Init commit

.gitignore

@@ -0,0 +1,35 @@
+# built application files
+*.apk
+*.ap_
+
+# files for the dex VM
+*.dex
+
+# Java class files
+*.class
+
+# generated files
+bin/
+gen/
+/*/.externalNativeBuild/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Eclipse project files
+.classpath
+.project
+
+# Android Studio
+.idea/
+.gradle
+build
+/*/local.properties
+/*/out
+/*/*/build
+/*/*/production
+*.iml
+*.iws
+*.ipr
+*~
+*.swp

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "app/src/main/cpp/xdelta3"]
+	path = app/src/main/cpp/xdelta3
+	url = https://github.com/jmacd/xdelta

COPYING

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

app/CMakeLists.txt

@@ -0,0 +1,4 @@
+cmake_minimum_required(VERSION 3.4.1)
+add_library( xdelta3 SHARED src/main/cpp/xdelta3.c )
+find_library( log-lib log )
+target_link_libraries( xdelta3 ${log-lib} )

app/build.gradle

@@ -0,0 +1,83 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 24
+    buildToolsVersion '24.0.2'
+
+    signingConfigs {
+        release
+    }
+
+    defaultConfig {
+        applicationId "org.emunix.unipatcher"
+        minSdkVersion 14
+        targetSdkVersion 24
+        versionCode 100000
+        versionName "0.10"
+        externalNativeBuild {
+            cmake {
+                cppFlags ""
+                arguments "-DANDROID_PLATFORM=android-14"
+            }
+        }
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled true
+            proguardFile './proguard-android.txt'
+            signingConfig signingConfigs.release
+        }
+    }
+
+    externalNativeBuild {
+        cmake {
+            path "CMakeLists.txt"
+        }
+    }
+}
+
+def Properties props = new Properties()
+def propFile = file('../../signing.properties')
+if (propFile.canRead()){
+    props.load(new FileInputStream(propFile))
+
+    if (props!=null && props.containsKey('STORE_FILE') && props.containsKey('STORE_PASSWORD') &&
+            props.containsKey('KEY_ALIAS') && props.containsKey('KEY_PASSWORD')) {
+
+        println 'RELEASE BUILD SIGNING'
+
+        android.signingConfigs.release.storeFile = file(props['STORE_FILE'])
+        android.signingConfigs.release.storePassword = props['STORE_PASSWORD']
+        android.signingConfigs.release.keyAlias = props['KEY_ALIAS']
+        android.signingConfigs.release.keyPassword = props['KEY_PASSWORD']
+    } else {
+        println 'RELEASE BUILD NOT FOUND SIGNING PROPERTIES'
+
+        android.buildTypes.release.signingConfig = null
+    }
+} else {
+    println 'RELEASE BUILD NOT FOUND SIGNING FILE'
+    android.buildTypes.release.signingConfig = null
+}
+
+dependencies {
+    testCompile 'junit:junit:4.12'
+    testCompile 'org.mockito:mockito-core:1.10.19'
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile 'com.android.support:support-v4:24.2.0'
+    compile 'com.android.support:appcompat-v7:24.2.0'
+    compile 'com.android.support:cardview-v7:24.2.0'
+    compile 'com.android.support:preference-v14:24.2.0'
+    compile 'com.android.support:recyclerview-v7:24.2.0'
+    compile 'com.android.support:design:24.2.0'
+    compile 'com.google.firebase:firebase-ads:9.4.0'
+    compile 'com.google.firebase:firebase-core:9.4.0'
+    compile 'com.google.firebase:firebase-crash:9.4.0'
+    compile 'com.anjlab.android.iab.v3:library:1.0.32'
+    compile 'commons-io:commons-io:2.5'
+    compile 'org.sufficientlysecure:html-textview:2.0'
+    compile 'com.afollestad.material-dialogs:core:0.9.0.1'
+}
+
+apply plugin: 'com.google.gms.google-services'

app/google-services.json

@@ -0,0 +1,53 @@
+{
+  "project_info": {
+    "project_number": "32713218397",
+    "firebase_url": "https://unipatcher-897b3.firebaseio.com",
+    "project_id": "unipatcher-897b3",
+    "storage_bucket": "unipatcher-897b3.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:32713218397:android:4b0afdca1aa174e1",
+        "android_client_info": {
+          "package_name": "org.emunix.unipatcher"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "32713218397-h8ptc6lelg9l871v10pgq11ni8ejaavg.apps.googleusercontent.com",
+          "client_type": 1,
+          "android_info": {
+            "package_name": "org.emunix.unipatcher",
+            "certificate_hash": "C31CB23D974F426B38D7AF0848A6F1066FCF1FD9"
+          }
+        },
+        {
+          "client_id": "32713218397-bhgevevp6i5coukhnkti1g9cecnujuav.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyD_8JprF21wL7wpRV7JymLzlbHR-jUBZKI"
+        }
+      ],
+      "services": {
+        "analytics_service": {
+          "status": 2,
+          "analytics_property": {
+            "tracking_id": "UA-77394676-1"
+          }
+        },
+        "appinvite_service": {
+          "status": 1,
+          "other_platform_oauth_client": []
+        },
+        "ads_service": {
+          "status": 2
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}

app/proguard-android.txt

@@ -0,0 +1,59 @@
+# This is a configuration file for ProGuard.
+# http://proguard.sourceforge.net/index.html#manual/usage.html
+
+-dontusemixedcaseclassnames
+-dontskipnonpubliclibraryclasses
+-verbose
+
+# Optimization is turned off by default. Dex does not like code run
+# through the ProGuard optimize and preverify steps (and performs some
+# of these optimizations on its own).
+-dontoptimize
+-dontpreverify
+# Note that if you want to enable optimization, you cannot just
+# include optimization flags in your own project configuration file;
+# instead you will need to point to the
+# "proguard-android-optimize.txt" file instead of this one from your
+# project.properties file.
+
+-keepattributes *Annotation*
+-keep public class com.google.vending.licensing.ILicensingService
+-keep public class com.android.vending.licensing.ILicensingService
+
+-keep class com.android.vending.billing.**
+
+# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+# keep setters in Views so that animations can still work.
+# see http://proguard.sourceforge.net/manual/examples.html#beans
+-keepclassmembers public class * extends android.view.View {
+   void set*(***);
+   *** get*();
+}
+
+# We want to keep methods in Activity that could be used in the XML attribute onClick
+-keepclassmembers class * extends android.app.Activity {
+   public void *(android.view.View);
+}
+
+# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+
+-keepclassmembers class * implements android.os.Parcelable {
+  public static final android.os.Parcelable$Creator CREATOR;
+}
+
+-keepclassmembers class **.R$* {
+    public static <fields>;
+}
+
+# The support library contains references to newer platform versions.
+# Don't warn about those in case this app is linking against an older
+# platform version.  We know about them, and they are safe.
+-dontwarn android.support.**

app/src/main/AndroidManifest.xml

@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.emunix.unipatcher"
+    android:installLocation="auto">
+
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="com.android.vending.BILLING" />
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+    <application
+        android:allowBackup="false"
+        android:fullBackupContent="false"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="false"
+        android:theme="@style/AppTheme.NoActionBar">
+        <activity
+            android:name=".ui.activity.MainActivity"
+            android:label="@string/app_name"
+            android:launchMode="singleTask">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data android:scheme="file" />
+                <data android:mimeType="*/*" />
+                <data android:pathPattern="/.*\\.ips" />
+                <data android:pathPattern="/.*\\.ups" />
+                <data android:pathPattern="/.*\\.bps" />
+                <data android:pathPattern="/.*\\.ppf" />
+                <data android:pathPattern="/.*\\.dps" />
+                <data android:pathPattern="/.*\\.xdelta" />
+                <data android:pathPattern="/.*\\.xdelta3" />
+                <data android:pathPattern="/.*\\.vcdiff" />
+                <data android:host="*" />
+            </intent-filter>
+        </activity>
+
+        <activity
+            android:name=".ui.activity.FilePickerActivity"
+            android:label="@string/file_picker_activity_title" />
+
+        <activity
+            android:name=".ui.activity.SettingsActivity"
+            android:label="@string/settings_activity_title"
+            android:theme="@style/PreferenceTheme" />
+
+        <activity
+            android:name=".ui.activity.HelpActivity"
+            android:label="@string/help_activity_title" />
+
+        <meta-data
+            android:name="com.google.android.gms.version"
+            android:value="@integer/google_play_services_version" />
+
+        <activity
+            android:name="com.google.android.gms.ads.AdActivity"
+            android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
+            android:theme="@android:style/Theme.Translucent" />
+
+        <service
+            android:name=".WorkerService"
+            android:exported="false" />
+
+    </application>
+
+</manifest>

app/src/main/cpp/xdelta3

@@ -0,0 +1 @@
+Subproject commit a089d04bf19d21a8ac5e03a9066e5a2e36e0b87a

app/src/main/cpp/xdelta3.c

@@ -0,0 +1,174 @@
+/*
+This file based on encode_decode_test.c from XDelta3 sources.
+
+Copyright (C) 2007 Ralf Junker
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <jni.h>
+#include <stdio.h>
+#include <string.h>
+#include <android/log.h>
+
+#define SIZEOF_SIZE_T 4
+#define SIZEOF_UNSIGNED_LONG_LONG 8
+
+#include "xdelta3/xdelta3/xdelta3.h"
+#include "xdelta3/xdelta3/xdelta3.c"
+
+int apply(FILE *patch, FILE *in, FILE *out);
+
+const int ERR_UNABLE_OPEN_PATCH = -5001;
+const int ERR_UNABLE_OPEN_ROM = -5002;
+const int ERR_UNABLE_OPEN_OUTPUT = -5003;
+const int ERR_WRONG_CHECKSUM = -5010;
+
+int Java_org_emunix_unipatcher_patch_XDelta_xdelta3apply(JNIEnv *env,
+            jobject this,
+            jstring patchPath,
+            jstring romPath,
+            jstring outputPath)
+{
+    int ret = 0;
+    const char *patchName = (*env)->GetStringUTFChars(env, patchPath, NULL);
+    const char *romName = (*env)->GetStringUTFChars(env, romPath, NULL);
+    const char *outputName = (*env)->GetStringUTFChars(env, outputPath, NULL);
+
+    FILE *patchFile = fopen(patchName, "rb");
+    FILE *romFile = fopen(romName, "rb");
+    FILE *outputFile = fopen(outputName, "wb");
+
+    (*env)->ReleaseStringUTFChars(env, patchPath, patchName);
+    (*env)->ReleaseStringUTFChars(env, romPath, romName);
+    (*env)->ReleaseStringUTFChars(env, outputPath, outputName);
+
+    if (!patchFile)
+    {
+        return ERR_UNABLE_OPEN_PATCH;
+    }
+
+    if (!romFile)
+    {
+        fclose(patchFile);
+        return ERR_UNABLE_OPEN_ROM;
+    }
+
+    if (!outputFile)
+    {
+        fclose(patchFile);
+        fclose(romFile);
+        return ERR_UNABLE_OPEN_OUTPUT;
+    }
+
+    ret = apply(patchFile, romFile, outputFile);
+
+    fclose(patchFile);
+    fclose(romFile);
+    fclose(outputFile);
+    return ret;
+}
+
+int apply(FILE *patch, FILE *in, FILE *out)
+{
+    int BUFFER_SIZE = 32768;
+
+    int r, ret;
+    xd3_stream stream;
+    xd3_config config;
+    xd3_source source;
+    void* Input_Buf;
+    int Input_Buf_Read;
+
+    memset (&stream, 0, sizeof (stream));
+    memset (&source, 0, sizeof (source));
+
+    xd3_init_config(&config, 0);
+    config.winsize = BUFFER_SIZE;
+    xd3_config_stream(&stream, &config);
+
+    source.blksize = BUFFER_SIZE;
+    source.curblk = malloc(source.blksize);
+
+    /* Load 1st block of stream. */
+    r = fseek(in, 0, SEEK_SET);
+    if (r)
+        return r;
+    source.onblk = fread((void*)source.curblk, 1, source.blksize, in);
+    source.curblkno = 0;
+    xd3_set_source(&stream, &source);
+
+    Input_Buf = malloc(BUFFER_SIZE);
+
+    fseek(patch, 0, SEEK_SET);
+    do
+    {
+        Input_Buf_Read = fread(Input_Buf, 1, BUFFER_SIZE, patch);
+        if (Input_Buf_Read < BUFFER_SIZE)
+        {
+            xd3_set_flags(&stream, XD3_FLUSH | stream.flags);
+        }
+        xd3_avail_input(&stream, Input_Buf, Input_Buf_Read);
+
+        process:
+
+        ret = xd3_decode_input(&stream);
+
+        switch (ret)
+        {
+            case XD3_INPUT:
+                continue;
+
+            case XD3_OUTPUT:
+                r = fwrite(stream.next_out, 1, stream.avail_out, out);
+                if (r != (int)stream.avail_out)
+                    return r;
+                xd3_consume_output(&stream);
+                goto process;
+
+            case XD3_GETSRCBLK:
+                r = fseek(in, source.blksize * source.getblkno, SEEK_SET);
+                if (r)
+                    return r;
+                source.onblk = fread((void*)source.curblk, 1, source.blksize, in);
+                source.curblkno = source.getblkno;
+                goto process;
+
+            case XD3_GOTHEADER:
+            case XD3_WINSTART:
+            case XD3_WINFINISH:
+                goto process;
+
+            default:
+                __android_log_print(ANDROID_LOG_ERROR, "XDelta3", "Error %d: %s", ret, stream.msg);
+                if (stream.msg != NULL) {
+                    if (strcmp(stream.msg, "target window checksum mismatch") == 0)
+                        return ERR_WRONG_CHECKSUM;
+                }
+                return ret;
+        }
+    }
+    while (Input_Buf_Read == BUFFER_SIZE);
+
+    free(Input_Buf);
+
+    free((void*)source.curblk);
+    xd3_close_stream(&stream);
+    xd3_free_stream(&stream);
+
+    return 0;
+}

app/src/main/java/org/emunix/unipatcher/Globals.java

@@ -0,0 +1,51 @@
+/*
+Copyright (C) 2013-2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher;
+
+public class Globals {
+    private static final String KEY = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA384jTCBEuJ8nCWaC4S6AFrnMQN4mBlmkOXHV3Xg5hlFOl8TkVwiCfqz8r20yJpEy0IJ1+3QRnlq59zadUxbkD+PacJlGB/r2b3mbKfu+m0K+e/0aL6eWupjMSIyPgpnbN3uswiBEGUb4ytzYF53ZKTbLARnruQdMnjV6+VyfwMgpor/48anVQawDARBj/AIAj6VGtRHLmg6DmKDyOGQ7uCgXSv+ysnBKJjtIX/L/5nQgL8Q+9jsr2knuWY7j9BmrtpUXaDH3Kb50M1TOCKiqxPGa8lInOOIndABWxcpqmSMXP06SPYOanUlEH7lT0jjqpHpFNx8hRTT9xf652rgMJwIDAQAB";
+    private static String cmdArgument = null;
+    private static boolean isFullVersion = false;
+
+    public static String getCmdArgument() {
+        return cmdArgument;
+    }
+
+    public static void setCmdArgument(String cmdArgument) {
+        Globals.cmdArgument = cmdArgument;
+    }
+
+    public static boolean isFullVersion() {
+        return isFullVersion;
+    }
+
+    public static void setFullVersion() {
+        isFullVersion = true;
+    }
+
+    public static String getKey() {
+        return KEY;
+    }
+
+    public static final int ACTION_PATCHING = 1;
+    public static final int ACTION_SMD_FIX_CHECKSUM = 2;
+    public static final int ACTION_SNES_ADD_SMC_HEADER = 3;
+    public static final int ACTION_SNES_DELETE_SMC_HEADER = 4;
+}

app/src/main/java/org/emunix/unipatcher/Settings.java

@@ -0,0 +1,67 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.support.v7.preference.PreferenceManager;
+
+public class Settings {
+
+    public static String getLastRomDir(Context context) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        return prefs.getString("last_rom_directory", null);
+    }
+
+    public static void setLastRomDir(Context context, String directory) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.putString("last_rom_directory", directory);
+        editor.apply();
+    }
+
+    public static String getLastPatchDir(Context context) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        return prefs.getString("last_patch_directory", null);
+    }
+
+    public static void setLastPatchDir(Context context, String directory) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.putString("last_patch_directory", directory);
+        editor.apply();
+    }
+
+    public static String getRomDir(Context context) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        if (prefs.getBoolean("remember_last_directories", true)) {
+            return getLastRomDir(context);
+        } else
+            return prefs.getString("rom_directory", "/");
+    }
+
+    public static String getPatchDir(Context context) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        if (prefs.getBoolean("remember_last_directories", true)) {
+            return getLastPatchDir(context);
+        } else
+            return prefs.getString("patch_directory", "/");
+    }
+}

app/src/main/java/org/emunix/unipatcher/Utils.java

@@ -0,0 +1,156 @@
+/*
+Copyright (C) 2013-2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher;
+
+import android.Manifest;
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.os.Build;
+import android.os.StatFs;
+import android.support.v4.content.ContextCompat;
+import android.util.DisplayMetrics;
+import android.util.Log;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.FilenameUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Locale;
+
+public class Utils {
+    private static final String LOG_TAG = "Utils";
+
+    private static final int BUFFER_SIZE = 10240; // 10 Kb
+
+    public static String getAppVersion(Context context) {
+        String versionName = "N/A";
+        try {
+            PackageInfo pinfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
+            versionName = pinfo.versionName;
+        } catch (Exception e) {
+            Log.e(LOG_TAG, "App version is not available");
+        }
+        return versionName;
+    }
+
+    public static boolean hasStoragePermission(Context context) {
+        return ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE)
+                == PackageManager.PERMISSION_GRANTED;
+    }
+
+    public static boolean isOnline(Context context) {
+        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkInfo netInfo = cm.getActiveNetworkInfo();
+        return netInfo != null && netInfo.isConnectedOrConnecting();
+    }
+
+    public static int dpToPx(Context context, int dp) {
+        DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
+        return Math.round(dp * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
+    }
+
+    @TargetApi(18)
+    public static long getFreeSpace(File file) {
+        StatFs stat = new StatFs(file.getPath());
+        long bytesAvailable;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2)
+            bytesAvailable = stat.getAvailableBytes();
+        else
+            //noinspection deprecation
+            bytesAvailable = (long) stat.getBlockSize() * (long) stat.getAvailableBlocks();
+        return bytesAvailable;
+    }
+
+    public static void copyFile(Context context, File from, File to) throws IOException {
+        if (Utils.getFreeSpace(to.getParentFile()) < from.length())
+            throw new IOException(context.getString(R.string.notify_error_not_enough_space));
+
+        try {
+            FileUtils.copyFile(from, to);
+        } catch (IOException e) {
+            throw new IOException(context.getString(R.string.notify_error_could_not_copy_file));
+        }
+    }
+
+    public static void moveFile(Context context, File from, File to) throws IOException {
+        FileUtils.deleteQuietly(to);
+        if(!from.renameTo(to)) {
+            copyFile(context, from, to);
+            FileUtils.deleteQuietly(from);
+        }
+    }
+
+    public static void copy(InputStream from, OutputStream to, long size) throws IOException {
+        byte[] buffer = new byte[BUFFER_SIZE];
+        int c;
+        while (size > 0) {
+            if (size < BUFFER_SIZE) {
+                c = from.read(buffer, 0, (int) size);
+            } else {
+                c = from.read(buffer);
+            }
+            if (c != -1) {
+                to.write(buffer, 0, c);
+                size -= c;
+            } else {
+                copy(size, (byte) 0x0, to);
+                size = 0;
+            }
+        }
+    }
+
+    public static void copy(long count, byte b, OutputStream to) throws IOException {
+        byte[] buffer = new byte[BUFFER_SIZE];
+        Arrays.fill(buffer, b);
+        while (count > 0) {
+            if (count >= BUFFER_SIZE) {
+                to.write(buffer);
+                count -= BUFFER_SIZE;
+            } else {
+                to.write(buffer, 0, (int) count);
+                count = 0;
+            }
+        }
+    }
+
+    public static boolean isPatch(File file) {
+        String[] patches = {"ips", "ups", "bps", "ppf", "dps", "xdelta", "xdelta3", "vcdiff"};
+        String ext = FilenameUtils.getExtension(file.getName()).toLowerCase(Locale.getDefault());
+        for (String patch : patches) {
+            if (ext.equals(patch))
+                return true;
+        }
+        return false;
+    }
+
+    public static boolean isArchive(String path) {
+        String ext = FilenameUtils.getExtension(path).toLowerCase(Locale.getDefault());
+        return ext.equals("zip") || ext.equals("rar") || ext.equals("7z") || ext.equals("gz") || ext.equals("tgz");
+    }
+}

app/src/main/java/org/emunix/unipatcher/WorkerService.java

@@ -0,0 +1,251 @@
+/*
+Copyright (C) 2013-2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher;
+
+import android.app.IntentService;
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.os.PowerManager;
+import android.support.v4.app.NotificationCompat;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.FilenameUtils;
+import org.emunix.unipatcher.patch.BPS;
+import org.emunix.unipatcher.patch.DPS;
+import org.emunix.unipatcher.patch.IPS;
+import org.emunix.unipatcher.patch.PPF;
+import org.emunix.unipatcher.patch.Patch;
+import org.emunix.unipatcher.patch.PatchException;
+import org.emunix.unipatcher.patch.UPS;
+import org.emunix.unipatcher.patch.XDelta;
+import org.emunix.unipatcher.tools.RomException;
+import org.emunix.unipatcher.tools.SmdFixChecksum;
+import org.emunix.unipatcher.tools.SnesSmcHeader;
+import org.emunix.unipatcher.ui.activity.MainActivity;
+import org.emunix.unipatcher.ui.notify.Notify;
+import org.emunix.unipatcher.ui.notify.PatchingNotify;
+import org.emunix.unipatcher.ui.notify.SmdFixChecksumNotify;
+import org.emunix.unipatcher.ui.notify.SnesAddSmcHeaderNotify;
+import org.emunix.unipatcher.ui.notify.SnesDeleteSmcHeaderNotify;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Locale;
+
+public class WorkerService extends IntentService {
+
+    public WorkerService() {
+        super("WorkerService");
+    }
+
+    @Override
+    protected void onHandleIntent(Intent intent) {
+        // if user deny write storage permission
+        if (!Utils.hasStoragePermission(this)) {
+            Intent notificationIntent = new Intent(this, MainActivity.class);
+            NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
+            Notification notify = new NotificationCompat.Builder(this)
+                    .setContentTitle(getString(R.string.notify_error))
+                    .setContentText(getString(R.string.permissions_storage_error_notify_access_denied))
+                    .setSmallIcon(R.drawable.ic_stat_patching)
+                    .setContentIntent(PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT))
+                    .setAutoCancel(true)
+                    .build();
+            nm.notify(0, notify);
+            return;
+        }
+
+        PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
+        PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "UniPatcher");
+        wakeLock.acquire();
+
+        try {
+            int action = intent.getIntExtra("action", 0);
+            switch (action) {
+                case Globals.ACTION_PATCHING:
+                    actionPatching(intent);
+                    break;
+                case Globals.ACTION_SMD_FIX_CHECKSUM:
+                    actionSmdFixChecksum(intent);
+                    break;
+                case Globals.ACTION_SNES_ADD_SMC_HEADER:
+                    actionSnesAddSmcHeader(intent);
+                    break;
+                case Globals.ACTION_SNES_DELETE_SMC_HEADER:
+                    actionSnesDeleteSmcHeader(intent);
+                    break;
+            }
+        } finally {
+            wakeLock.release();
+        }
+    }
+
+    private void actionPatching(Intent intent) {
+        String errorMsg = null;
+        File romFile = new File(intent.getStringExtra("romPath"));
+        File patchFile = new File(intent.getStringExtra("patchPath"));
+        File outputFile = new File(intent.getStringExtra("outputPath"));
+        Patch patcher = null;
+
+        if(!fileExists(patchFile) || !fileExists(romFile))
+            return;
+
+        String ext = FilenameUtils.getExtension(patchFile.getName()).toLowerCase(Locale.getDefault());
+        if ("ips".equals(ext))
+            patcher = new IPS(this, patchFile, romFile, outputFile);
+        else if ("ups".equals(ext))
+            patcher = new UPS(this, patchFile, romFile, outputFile);
+        else if ("bps".equals(ext))
+            patcher = new BPS(this, patchFile, romFile, outputFile);
+        else if ("ppf".equals(ext))
+            patcher = new PPF(this, patchFile, romFile, outputFile);
+        else if ("dps".equals(ext))
+            patcher = new DPS(this, patchFile, romFile, outputFile);
+        else if ("xdelta".equals(ext) || "xdelta3".equals(ext) || "vcdiff".equals(ext))
+            patcher = new XDelta(this, patchFile, romFile, outputFile);
+        else
+            errorMsg = getString(R.string.notify_error_unknown_patch_format);
+
+        Notify notify = new PatchingNotify(this, outputFile.getName());
+
+        if (errorMsg != null) {
+            notify.showResult(errorMsg);
+            return;
+        }
+
+        startForeground(notify.getID(), notify.getNotifyBuilder().build());
+
+        try {
+            if ("ppf".equals(ext))
+                Utils.copyFile(this, romFile, outputFile);
+            patcher.apply();
+        } catch (PatchException | IOException e) {
+            if (Utils.getFreeSpace(outputFile.getParentFile()) == 0) {
+                errorMsg = getString(R.string.notify_error_not_enough_space);
+            } else {
+                errorMsg = e.getMessage();
+            }
+            FileUtils.deleteQuietly(outputFile);
+        } finally {
+            stopForeground(true);
+        }
+        notify.showResult(errorMsg);
+    }
+
+    private void actionSmdFixChecksum(Intent intent) {
+        String errorMsg = null;
+        File romFile = new File(intent.getStringExtra("romPath"));
+
+        if(!fileExists(romFile))
+            return;
+
+        SmdFixChecksum fixer = new SmdFixChecksum(this, romFile);
+
+        Notify notify = new SmdFixChecksumNotify(this, romFile.getName());
+        startForeground(notify.getID(), notify.getNotifyBuilder().build());
+
+        try {
+            fixer.fixChecksum();
+        } catch (RomException | IOException e) {
+            errorMsg = e.getMessage();
+        } finally {
+            stopForeground(true);
+        }
+        notify.showResult(errorMsg);
+    }
+
+    private void actionSnesAddSmcHeader(Intent intent) {
+        String errorMsg = null;
+
+        File romFile = new File(intent.getStringExtra("romPath"));
+        String headerPath = intent.getStringExtra("headerPath");
+
+        if(!fileExists(romFile))
+            return;
+
+        SnesSmcHeader worker = new SnesSmcHeader();
+
+        Notify notify = new SnesAddSmcHeaderNotify(this, romFile.getName());
+        startForeground(notify.getID(), notify.getNotifyBuilder().build());
+
+        try {
+            if (headerPath == null)
+                worker.addSnesSmcHeader(this, romFile);
+            else
+                worker.addSnesSmcHeader(this, romFile, new File(headerPath));
+        } catch (RomException | IOException e) {
+            if (Utils.getFreeSpace(romFile.getParentFile()) == 0) {
+                errorMsg = getString(R.string.notify_error_not_enough_space);
+            } else {
+                errorMsg = e.getMessage();
+            }
+        } finally {
+            stopForeground(true);
+        }
+        notify.showResult(errorMsg);
+    }
+
+    private void actionSnesDeleteSmcHeader(Intent intent) {
+        String errorMsg = null;
+
+        File romFile = new File(intent.getStringExtra("romPath"));
+
+        if(!fileExists(romFile))
+            return;
+
+        SnesSmcHeader worker = new SnesSmcHeader();
+
+        Notify notify = new SnesDeleteSmcHeaderNotify(this, romFile.getName());
+        startForeground(notify.getID(), notify.getNotifyBuilder().build());
+
+        try {
+            worker.deleteSnesSmcHeader(this, romFile);
+        } catch (RomException | IOException e) {
+            if (Utils.getFreeSpace(romFile.getParentFile()) == 0) {
+                errorMsg = getString(R.string.notify_error_not_enough_space);
+            } else {
+                errorMsg = e.getMessage();
+            }
+        } finally {
+            stopForeground(true);
+        }
+        notify.showResult(errorMsg);
+    }
+
+    private boolean fileExists(File f) {
+        if (!f.exists() || f.isDirectory()) {
+            Intent notificationIntent = new Intent(this, MainActivity.class);
+            String text = getString(R.string.notify_error_file_not_found).concat(": ").concat(f.getName());
+            NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
+            Notification notify = new NotificationCompat.Builder(this)
+                    .setContentTitle(getString(R.string.notify_error))
+                    .setContentText(text)
+                    .setSmallIcon(R.drawable.ic_stat_patching)
+                    .setContentIntent(PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT))
+                    .setAutoCancel(true)
+                    .build();
+            nm.notify(0, notify);
+            return false;
+        }
+        return true;
+    }
+}

app/src/main/java/org/emunix/unipatcher/ad/AdMobController.java

@@ -0,0 +1,97 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ad;
+
+import android.content.Context;
+import android.view.View;
+import android.widget.FrameLayout;
+
+import com.google.android.gms.ads.AdListener;
+import com.google.android.gms.ads.AdRequest;
+import com.google.android.gms.ads.AdView;
+
+import org.emunix.unipatcher.Globals;
+
+public class AdMobController implements AdsController {
+
+    private static final String ADMOB_ID = "ca-app-pub-2445378722408015/8831379284";
+    private AdView adView;
+    private final Context context;
+
+    public AdMobController(Context c, FrameLayout layout) {
+        context = c;
+        createView(layout);
+    }
+
+    public void createView(FrameLayout layout) {
+        adView = new AdView(context);
+        adView.setAdSize(com.google.android.gms.ads.AdSize.SMART_BANNER);
+        adView.setAdUnitId(ADMOB_ID);
+        AdRequest adRequest = new AdRequest.Builder()
+                .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
+                .addTestDevice("018B7216B142ABE97F9BFCD880C02EBC")  // htc one v
+                .addTestDevice("64F8D0EE579BA448E833172DB2D91CBB")  // lg nexus 5
+                .build();
+        adView.setAdListener(new AdListener() {
+            @Override
+            public void onAdLoaded() {
+                super.onAdLoaded();
+                if (Globals.isFullVersion()) {
+                    adView.setVisibility(View.GONE);
+                }
+            }
+            @Override
+            public void onAdOpened() {
+            }
+        });
+        adView.loadAd(adRequest);
+        layout.addView(adView);
+    }
+
+    public void show(boolean show) {
+        if (adView != null) {
+            if (!show) {
+                adView.setVisibility(View.GONE);
+            } else if (!Globals.isFullVersion()) {
+                adView.setVisibility(View.VISIBLE);
+            }
+        }
+    }
+
+    public void pause() {
+        if (adView != null) {
+            adView.pause();
+        }
+    }
+
+    public void resume() {
+        if (adView != null) {
+            adView.resume();
+        }
+    }
+
+    public void start() {}
+
+    public void destroy() {
+        if (adView != null) {
+            adView.destroy();
+        }
+    }
+}

app/src/main/java/org/emunix/unipatcher/ad/AdsController.java

@@ -0,0 +1,31 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ad;
+
+import android.widget.FrameLayout;
+
+interface AdsController {
+    void createView(FrameLayout layout);
+    void show(boolean show);
+    void start();
+    void destroy();
+    void resume();
+    void pause();
+}

app/src/main/java/org/emunix/unipatcher/patch/BPS.java

@@ -0,0 +1,301 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.patch;
+
+import android.content.Context;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.IOUtils;
+import org.emunix.unipatcher.R;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.util.Arrays;
+import java.util.zip.CRC32;
+
+public class BPS extends Patch {
+
+    private static final byte[] MAGIC_NUMBER = {0x42, 0x50, 0x53, 0x31}; // "BPS1"
+    private static final byte SOURCE_READ = 0b00;
+    private static final byte TARGET_READ = 0b01;
+    private static final byte SOURCE_COPY = 0b10;
+    private static final byte TARGET_COPY = 0b11;
+
+    private ByteBuffer buffer = ByteBuffer.allocate(10485760); // 10mb
+
+    public BPS(Context context, File patch, File rom, File output) {
+        super(context, patch, rom, output);
+    }
+
+    @Override
+    public void apply() throws PatchException, IOException {
+
+        if (patchFile.length() < 19) {
+            throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+        }
+
+        FileChannel patch = null;
+        FileChannel rom = null;
+        FileChannel output = null;
+        BpsCrc bpsCrc;
+        try {
+            if (!checkMagic(patchFile))
+                throw new PatchException(context.getString(R.string.notify_error_not_bps_patch));
+
+            bpsCrc = readBpsCrc(context, patchFile);
+            if (bpsCrc.getPatchFileCRC() != bpsCrc.getRealPatchCRC())
+                throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+
+            long realRomCrc = FileUtils.checksumCRC32(romFile);
+            if (realRomCrc != bpsCrc.getInputFileCRC()) {
+                throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+            }
+
+            patch = new RandomAccessFile(patchFile, "r").getChannel();
+            patch.position(4); // skip magic
+
+            // decode rom size
+            long romSize = decode(patch);
+            rom = new RandomAccessFile(romFile, "r").getChannel();
+
+            // decode output size
+            long outputSize = decode(patch);
+            output = new RandomAccessFile(outputFile, "rw").getChannel();
+
+            // decode metadata size and skip
+            int metadataSize = (int) decode(patch);
+            for (int i = 0; i < metadataSize; i++) {
+                patch.position(patch.position() + metadataSize);
+            }
+
+            int romRelOffset = 0;
+            int outRelOffset = 0;
+            long offset;
+            long length;
+            byte mode;
+
+            while (patch.position() < patchFile.length() - 12) {
+                length = decode(patch);
+                mode = (byte) (length & 0b11);
+                length = (length >> 2) + 1;
+
+                switch (mode) {
+                    case SOURCE_READ:
+                        copy(rom, output.position(), length, output);
+                        break;
+                    case TARGET_READ:
+                        copy(patch, patch.position(), length, output);
+                        patch.position(patch.position() + length);
+                        break;
+                    case SOURCE_COPY:
+                    case TARGET_COPY:
+                        offset = decode(patch);
+                        byte negative = (byte) (offset & 1);
+                        offset >>= 1;
+                        if (negative == 1) offset = -offset;
+
+                        if (mode == SOURCE_COPY) {
+                            romRelOffset += offset;
+                            copy(rom, romRelOffset, length, output);
+                            romRelOffset += length;
+                        } else {
+                            outRelOffset += offset;
+                            copyTarget(output, outRelOffset, length);
+                            outRelOffset += length;
+                        }
+                }
+            }
+        } finally {
+            IOUtils.closeQuietly(patch);
+            IOUtils.closeQuietly(rom);
+            IOUtils.closeQuietly(output);
+        }
+
+        long realOutCrc = FileUtils.checksumCRC32(outputFile);
+        if (realOutCrc != bpsCrc.getOutputFileCRC())
+            throw new PatchException(context.getString(R.string.notify_error_wrong_checksum_after_patching));
+    }
+
+    // decode pointer
+    private long decode(FileChannel fc) throws IOException {
+        buffer.clear();
+        buffer.limit(1);
+        long offset = 0;
+        int shift = 1;
+        int c, x;
+        while (true) {
+            c = fc.read(buffer);
+            if (c < 1) throw new IOException("read < 1 byte");
+            x = buffer.get(0);
+            offset += (x & 0x7fL) * shift;
+            if ((x & 0x80) != 0) break;
+            shift <<= 7;
+            offset += shift;
+            buffer.flip();
+        }
+        buffer.clear();
+        return offset;
+    }
+
+    private void copy(FileChannel from, long pos, long size, FileChannel to) throws IOException {
+        buffer.clear();
+        int c1, c2;
+        while (size > 0) {
+            if (size < buffer.capacity())
+                buffer.limit((int) size);
+            c1 = from.read(buffer, pos);
+            buffer.flip();
+            c2 = to.write(buffer);
+            buffer.clear();
+            if (c1 != c2)
+                throw new IOException("Read and write a different number of bytes");
+            pos += c1;
+            size -= c1;
+        }
+    }
+
+    private void copyTarget(FileChannel fc, int offset, long size) throws IOException {
+        long bufSize = fc.position() + size - offset;
+        buffer.clear();
+        if (bufSize <= buffer.capacity()) {
+            buffer.limit((int) bufSize);
+            fc.read(buffer, offset);
+            buffer.position((int) (fc.position() - offset));
+            int bufferOffset = 0;
+            while (size-- != 0) {
+                buffer.put(buffer.get(bufferOffset++));
+            }
+            buffer.position((int) (fc.position() - offset));
+            fc.write(buffer);
+        } else { // very strange patch
+            buffer.limit(1);
+            while (size-- != 0) {
+                fc.read(buffer, offset);
+                buffer.flip();
+                fc.write(buffer);
+                buffer.flip();
+            }
+        }
+        buffer.clear();
+    }
+
+    public static boolean checkMagic(File f) throws IOException {
+        FileInputStream stream = null;
+        try {
+            stream = new FileInputStream(f);
+            byte[] buffer = new byte[4];
+            stream.read(buffer);
+            return Arrays.equals(buffer, MAGIC_NUMBER);
+        } finally {
+            IOUtils.closeQuietly(stream);
+        }
+    }
+
+    public static BpsCrc readBpsCrc(Context context, File f) throws PatchException, IOException {
+        BufferedInputStream stream = null;
+        try {
+            stream = new BufferedInputStream(new FileInputStream(f));
+            CRC32 crc = new CRC32();
+            int x;
+            for (long i = f.length() - 12; i != 0; i--) {
+                x = stream.read();
+                if (x == -1)
+                    throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+                crc.update(x);
+            }
+
+            long inputCrc = 0;
+            for (int i = 0; i < 4; i++) {
+                x = stream.read();
+                if (x == -1)
+                    throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+                crc.update(x);
+                inputCrc += ((long) x) << (i * 8);
+            }
+
+            long outputCrc = 0;
+            for (int i = 0; i < 4; i++) {
+                x = stream.read();
+                if (x == -1)
+                    throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+                crc.update(x);
+                outputCrc += ((long) x) << (i * 8);
+            }
+
+            long realPatchCrc = crc.getValue();
+            long patchCrc = readLong(stream);
+            if (patchCrc == -1)
+                throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+            return new BpsCrc(inputCrc, outputCrc, patchCrc, realPatchCrc);
+        } finally {
+           IOUtils.closeQuietly(stream);
+        }
+    }
+
+    private static long readLong(BufferedInputStream stream) throws IOException {
+        long result = 0;
+        int x;
+        for (int i = 0; i < 4; i++) {
+            x = stream.read();
+            if (x == -1)
+                return -1;
+            result += ((long) x) << (i * 8);
+        }
+        return result;
+    }
+
+    public static class BpsCrc {
+        private long inputFileCRC;
+        private long outputFileCRC;
+        private long patchFileCRC;
+        private long realPatchCRC;
+
+        public BpsCrc(long inputFileCRC, long outputFileCRC, long patchFileCRC, long realPatchCRC) {
+
+            this.inputFileCRC = inputFileCRC;
+            this.outputFileCRC = outputFileCRC;
+            this.patchFileCRC = patchFileCRC;
+            this.realPatchCRC = realPatchCRC;
+        }
+
+        public long getInputFileCRC() {
+            return inputFileCRC;
+        }
+
+        public long getOutputFileCRC() {
+            return outputFileCRC;
+        }
+
+        public long getPatchFileCRC() {
+            return patchFileCRC;
+        }
+
+        public long getRealPatchCRC() {
+            return realPatchCRC;
+        }
+
+    }
+
+}

app/src/main/java/org/emunix/unipatcher/patch/DPS.java

@@ -0,0 +1,127 @@
+/*
+Copyright (C) 2014, 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.patch;
+
+import android.content.Context;
+
+import org.apache.commons.io.IOUtils;
+import org.emunix.unipatcher.R;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+public class DPS extends Patch {
+
+    private static final int MIN_SIZE_PATCH = 136;
+    private static final int BUFFER_SIZE = 32768;
+    private static final int COPY_DATA = 0;
+    private static final int ENCLOSED_DATA = 1;
+
+    public DPS(Context context, File patch, File rom, File output) {
+        super(context, patch, rom, output);
+    }
+
+    @Override
+    public void apply() throws PatchException, IOException {
+
+		if (patchFile.length() < MIN_SIZE_PATCH) {
+		    throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+		}
+
+		BufferedInputStream patchStream = null;
+        RandomAccessFile romStream = null;
+        RandomAccessFile outputStream = null;
+
+        try {
+            patchStream = new BufferedInputStream(new FileInputStream(patchFile));
+
+            byte[] buffer = new byte[BUFFER_SIZE];
+
+            // check version of dps patch
+            long i = patchStream.read(buffer, 0, 198);
+            if (buffer[193] != 1)
+                throw new PatchException(context.getString(R.string.notify_error_not_dps_patch));
+
+            // verify rom
+            long romSize = getUInt(buffer, 194);
+            if (romSize != romFile.length())
+                throw new IOException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+
+            romStream = new RandomAccessFile(romFile, "r");
+            outputStream = new RandomAccessFile(outputFile, "rw");
+
+            int mode;
+            long offset;
+            long length;
+            while ((i = patchStream.read(buffer, 0, 5)) != -1) {
+                mode = buffer[0];
+                offset = getUInt(buffer, 1);
+                outputStream.seek(offset);
+
+                switch (mode) {
+                    case COPY_DATA:
+                        i = patchStream.read(buffer, 0, 8);
+                        offset = getUInt(buffer, 0);
+                        length = getUInt(buffer, 4);
+                        romStream.seek(offset);
+                        while (length > 0) {
+                            if (length < BUFFER_SIZE) {
+                                i = romStream.read(buffer, 0, (int) length);
+                                outputStream.write(buffer, 0, (int) i);
+                                length -= i;
+                            } else {
+                                i = romStream.read(buffer, 0, BUFFER_SIZE);
+                                outputStream.write(buffer, 0, (int) i);
+                                length -= i;
+                            }
+                        }
+                        break;
+                    case ENCLOSED_DATA:
+                        i = patchStream.read(buffer, 0, 4);
+                        length = getUInt(buffer, 0);
+                        while (length > 0) {
+                            if (length < BUFFER_SIZE) {
+                                i = patchStream.read(buffer, 0, (int) length);
+                                outputStream.write(buffer, 0, (int) i);
+                                length -= i;
+                            } else {
+                                i = patchStream.read(buffer, 0, BUFFER_SIZE);
+                                outputStream.write(buffer, 0, (int) i);
+                                length -= i;
+                            }
+                        }
+                        break;
+                }
+            }
+        } finally {
+            IOUtils.closeQuietly(romStream);
+            IOUtils.closeQuietly(outputStream);
+            IOUtils.closeQuietly(patchStream);
+        }
+    }
+
+    private long getUInt(byte[] a, int offset) {
+    	return 	((long)(a[offset] & 0xff)) + ((long)(a[offset + 1] & 0xff) << 8) +
+    			((long)(a[offset + 2] & 0xff) << 16) + ((long)(a[offset + 3] & 0xff) << 24);
+    }
+}

app/src/main/java/org/emunix/unipatcher/patch/IPS.java

@@ -0,0 +1,155 @@
+/*
+Copyright (C) 2013, 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.patch;
+
+import android.content.Context;
+
+import org.apache.commons.io.IOUtils;
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.Utils;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+
+public class IPS extends Patch {
+
+    private static final byte[] MAGIC_NUMBER = {0x50, 0x41, 0x54, 0x43, 0x48}; // "PATCH"
+
+    public IPS(Context context, File patch, File rom, File output) {
+        super(context, patch, rom, output);
+    }
+
+    @Override
+    public void apply() throws PatchException, IOException {
+
+        BufferedInputStream romStream = null;
+        BufferedInputStream patchStream = null;
+        BufferedOutputStream outputStream = null;
+
+        try {
+            romStream = new BufferedInputStream(new FileInputStream(romFile));
+            patchStream = new BufferedInputStream(new FileInputStream(patchFile));
+            outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));
+
+            long romSize = romFile.length();
+            int romPos = 0;
+            int outPos = 0;
+            int offset;
+            int size;
+
+            if (patchFile.length() < 14) {
+                throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+            }
+
+            // check magic string
+            byte[] magic = new byte[5];
+            size = patchStream.read(magic);
+            if (size != 5 || !Arrays.equals(magic, MAGIC_NUMBER))
+                throw new PatchException(context.getString(R.string.notify_error_not_ips_patch));
+
+            while (true) {
+                offset = readOffset(patchStream, 3);
+                if (offset < 0)
+                    throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+                if (offset == 0x454f46) { // EOF
+                    // truncate file or copy tail
+                    if (romPos < romSize) {
+                        offset = readOffset(patchStream, 3);
+                        if (offset != -1 && offset >= romPos) {
+                            size = offset - romPos;
+                        } else {
+                            size = (int) romSize - romPos;
+                        }
+                        Utils.copy(romStream, outputStream, size);
+                    }
+                    break;
+                }
+
+                if (offset <= romSize) {
+                    if (outPos < offset) {
+                        size = offset - outPos;
+                        Utils.copy(romStream, outputStream, size);
+                        romPos += size;
+                        outPos += size;
+                    }
+                } else {
+                    if (outPos < romSize) {
+                        size = (int) romSize - outPos;
+                        Utils.copy(romStream, outputStream, size);
+                        romPos += size;
+                        outPos += size;
+                    }
+                    if (outPos < offset) {
+                        size = offset - outPos;
+                        Utils.copy(size, (byte) 0x0, outputStream);
+                        outPos += size;
+                    }
+                }
+
+                size = (patchStream.read() << 8) + patchStream.read();
+                if (size != 0) {
+                    byte[] data = new byte[size];
+                    patchStream.read(data);
+                    outputStream.write(data);
+                    outPos += size;
+                } else { // RLE
+                    size = (patchStream.read() << 8) + patchStream.read();
+                    byte val = (byte) patchStream.read();
+                    byte[] data = new byte[size];
+                    Arrays.fill(data, val);
+                    outputStream.write(data);
+                    outPos += size;
+                }
+
+                if (offset <= romSize) {
+                    if (romPos + size > romSize) {
+                        romPos = (int) romSize;
+                    } else {
+                        // Не используй romStream.skip(size), оно по какой-то причине не всегда пропускает байты.
+                        byte[] buf = new byte[size];
+                        romStream.read(buf);
+                        romPos += size;
+                    }
+                }
+            }
+        } finally {
+            IOUtils.closeQuietly(romStream);
+            IOUtils.closeQuietly(patchStream);
+            IOUtils.closeQuietly(outputStream);
+        }
+    }
+
+    private int readOffset(InputStream stream, int numBytes) throws IOException {
+        int offset = 0;
+        while (numBytes-- != 0) {
+            int b = stream.read();
+            if (b == -1)
+                return -1;
+            offset = (offset << 8) + b;
+        }
+        return offset;
+    }
+}

app/src/main/java/org/emunix/unipatcher/patch/PPF.java

@@ -0,0 +1,267 @@
+/*
+Copyright (C) 2013 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.patch;
+
+import android.content.Context;
+
+import org.apache.commons.io.IOUtils;
+import org.emunix.unipatcher.R;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.Arrays;
+
+public class PPF extends Patch {
+
+//    private static final String LOG_TAG = "PPF";
+    private static final byte[] MAGIC_NUMBER = {0x50, 0x50, 0x46}; // "PPF" without version
+
+    private RandomAccessFile patchStream;
+    private RandomAccessFile outputStream;
+
+    public PPF(Context context, File patch, File rom, File output) {
+        super(context, patch, rom, output);
+    }
+
+    /**
+     * Check what PPF version we have.
+     *
+     * @param file PPF patch
+     * @return PPF patch version or 0 if the file is not a PPF patch
+     * @throws IOException
+     */
+    private int getPPFVersion(File file) throws IOException {
+        FileInputStream stream = null;
+        int version = 0;
+        try {
+            stream = new FileInputStream(file);
+            byte[] buffer = new byte[3];
+            stream.read(buffer);
+            if (Arrays.equals(buffer, MAGIC_NUMBER)) {
+                int b = stream.read();
+                if (b == 0x31) version = 1;
+                else if (b == 0x32) version = 2;
+                else if (b == 0x33) version = 3;
+            }
+        } finally {
+            IOUtils.closeQuietly(stream);
+        }
+        return version;
+    }
+
+    @Override
+    public void apply() throws PatchException, IOException {
+        if (patchFile.length() < 61) {
+            throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+        }
+
+        switch (getPPFVersion(patchFile)) {
+            case 1: applyPPF1(); break;
+            case 2: applyPPF2(); break;
+            case 3: applyPPF3(); break;
+            default: throw new PatchException(context.getString(R.string.notify_error_not_ppf_patch));
+        }
+    }
+
+    private void applyPPF1() throws IOException {
+        try {
+            patchStream = new RandomAccessFile(patchFile, "r");
+            outputStream = new RandomAccessFile(outputFile, "rw");
+
+            long dataEnd = patchFile.length();
+            int chunkSize;
+            byte[] chunkData = new byte[256];
+            long offset;
+
+            patchStream.seek(56);
+            while (patchStream.getFilePointer() < dataEnd) {
+                offset = readLittleEndianInt(patchStream);
+                chunkSize = patchStream.readUnsignedByte();
+                patchStream.read(chunkData, 0, chunkSize);
+                outputStream.seek(offset);
+                outputStream.write(chunkData, 0, chunkSize);
+            }
+        } finally {
+            IOUtils.closeQuietly(patchStream);
+            IOUtils.closeQuietly(outputStream);
+        }
+    }
+
+    private void applyPPF2() throws IOException, PatchException {
+        try {
+            patchStream = new RandomAccessFile(patchFile, "r");
+
+            // Check size of ROM
+            patchStream.seek(56);
+            long romSize = readLittleEndianInt(patchStream);
+            if (romSize != romFile.length()) {
+                throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+            }
+
+            outputStream = new RandomAccessFile(outputFile, "rw");
+
+            // Check binary block
+            byte[] patchBinaryBlock = new byte[1024];
+            byte[] romBinaryBlock = new byte[1024];
+            outputStream.seek(0x9320);
+            patchStream.read(patchBinaryBlock, 0, 1024);
+            outputStream.read(romBinaryBlock, 0, 1024);
+            if (!Arrays.equals(patchBinaryBlock, romBinaryBlock))
+                throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+
+            // Calculate end of patch data
+            long dataEnd = patchFile.length();
+            int sizeFileId = getSizeFileId(patchStream, 2);
+            if (sizeFileId > 0) {
+                dataEnd -= (18 + sizeFileId + 16 + 4);
+            }
+
+            // Apply patch
+            int chunkSize;
+            byte[] chunkData = new byte[256];
+            long offset;
+
+            patchStream.seek(1084);
+            while (patchStream.getFilePointer() < dataEnd) {
+                offset = readLittleEndianInt(patchStream);
+                chunkSize = patchStream.readUnsignedByte();
+                patchStream.read(chunkData, 0, chunkSize);
+                outputStream.seek(offset);
+                outputStream.write(chunkData, 0, chunkSize);
+            }
+        } finally {
+            IOUtils.closeQuietly(patchStream);
+            IOUtils.closeQuietly(outputStream);
+        }
+    }
+
+    private void applyPPF3() throws IOException, PatchException {
+        try {
+            patchStream = new RandomAccessFile(patchFile, "r");
+            outputStream = new RandomAccessFile(outputFile, "rw");
+
+            patchStream.seek(56);
+            byte imagetype = patchStream.readByte();
+            byte blockcheck = patchStream.readByte();
+            byte undo = patchStream.readByte();
+
+            // Check binary block
+            if (blockcheck == 0x01) {
+                byte[] patchBinaryBlock = new byte[1024];
+                byte[] romBinaryBlock = new byte[1024];
+                patchStream.seek(60);
+                if (imagetype == 0x01) {
+                    outputStream.seek(0x80A0);
+                } else {
+                    outputStream.seek(0x9320);
+                }
+                patchStream.read(patchBinaryBlock, 0, 1024);
+                outputStream.read(romBinaryBlock, 0, 1024);
+                if (!Arrays.equals(patchBinaryBlock, romBinaryBlock))
+                    throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+            }
+
+            // Calculate end of patch data
+            long dataEnd = patchFile.length();
+            int sizeFileId = getSizeFileId(patchStream, 3);
+            if (sizeFileId > 0) {
+                dataEnd -= (18 + sizeFileId + 16 + 2);
+            }
+
+            // Seek start address of patch data
+            if (blockcheck == 0x01) {
+                patchStream.seek(1084);
+            } else {
+                patchStream.seek(60);
+            }
+
+            // Apply patch
+            int chunkSize;
+            byte[] chunkData = new byte[512];
+            long offset;
+
+            while (patchStream.getFilePointer() < dataEnd) {
+                offset = readLittleEndianLong(patchStream);
+                //Log.d(LOG_TAG, String.valueOf(patchStream.getFilePointer()) + ' ' + String.valueOf(offset));
+                chunkSize = patchStream.readUnsignedByte();
+                patchStream.read(chunkData, 0, chunkSize);
+                if (undo == 0x01) patchStream.seek(patchStream.getFilePointer() + chunkSize);
+                outputStream.seek(offset);
+                outputStream.write(chunkData, 0, chunkSize);
+            }
+        } finally {
+            IOUtils.closeQuietly(patchStream);
+            IOUtils.closeQuietly(outputStream);
+        }
+    }
+
+    private long readLittleEndianLong(RandomAccessFile stream) throws IOException {
+        byte[] b = new byte[8];
+        stream.read(b);
+        long result = ((long)(b[7] & 0xff) << 56) + ((long)(b[6] & 0xff) << 48 ) +
+                ((long)(b[5] & 0xff) << 40) + ((long)(b[4] & 0xff) << 32 ) +
+                ((long)(b[3] & 0xff) << 24) + ((long)(b[2] & 0xff) << 16 ) +
+                ((long)(b[1] & 0xff) << 8) + ((long)b[0] & 0xff);
+        return result;
+    }
+
+    private int readLittleEndianInt(RandomAccessFile stream) throws IOException {
+        byte[] b = new byte[4];
+        stream.read(b);
+        return ((b[3] & 0xff) << 24) + ((b[2] & 0xff) <<16 ) +
+                ((b[1] & 0xff) << 8) + (b[0]&0xff);
+    }
+
+    /**
+     * Returns size of FileID
+     *
+     * @param stream stream of PPF file
+     * @param ppfVersion version of PPF patch
+     * @return size of FileID or 0
+     */
+    private int getSizeFileId(RandomAccessFile stream, int ppfVersion) throws IOException {
+        final byte[] magic = {0x2E, 0x44, 0x49, 0x5A}; // ".DIZ"
+        byte[] buffer = new byte[4];
+        int result;
+
+        if (ppfVersion == 2) {
+            stream.seek(stream.length() - 4 - 4);
+        } else {
+            stream.seek(stream.length() - 2 - 4);
+        }
+
+        stream.read(buffer, 0, 4);
+        if (!Arrays.equals(magic, buffer)) {
+            return 0;
+        }
+
+        if (ppfVersion == 2) {
+            result = readLittleEndianInt(stream);
+        } else {
+            result = stream.readUnsignedByte() + (stream.readUnsignedByte() << 8);
+        }
+
+        if (result > 3072) result = 3072;
+        return result;
+    }
+
+}

app/src/main/java/org/emunix/unipatcher/patch/Patch.java

@@ -0,0 +1,41 @@
+/*
+Copyright (C) 2013 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.patch;
+
+import android.content.Context;
+
+import java.io.File;
+import java.io.IOException;
+
+public abstract class Patch {
+    protected File patchFile = null;
+    protected File romFile = null;
+    protected File outputFile = null;
+    protected Context context = null;
+
+    public Patch(Context c, File patch, File rom, File output) {
+        context = c;
+        patchFile = patch;
+        romFile = rom;
+        outputFile = output;
+    }
+
+    public abstract void apply() throws PatchException, IOException;
+}

app/src/main/java/org/emunix/unipatcher/patch/PatchException.java

@@ -0,0 +1,31 @@
+/*
+Copyright (C) 2013 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.patch;
+
+public class PatchException extends Exception {
+
+    public PatchException() {
+        super();
+    }
+
+    public PatchException(String message) {
+        super(message);
+    }
+}

app/src/main/java/org/emunix/unipatcher/patch/UPS.java

@@ -0,0 +1,271 @@
+/*
+Copyright (C) 2013, 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.patch;
+
+import android.content.Context;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.IOUtils;
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.Utils;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.zip.CRC32;
+
+public class UPS extends Patch {
+
+    private static final byte[] MAGIC_NUMBER = {0x55, 0x50, 0x53, 0x31}; // "UPS1"
+    public UPS(Context context, File patch, File rom, File output) {
+        super(context, patch, rom, output);
+    }
+
+    @Override
+    public void apply() throws PatchException, IOException {
+
+        if (patchFile.length() < 18) {
+            throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+        }
+
+        BufferedInputStream patchStream = null;
+        BufferedInputStream romStream = null;
+        BufferedOutputStream outputStream = null;
+        UpsCrc upsCrc;
+        try {
+            if (!checkMagic(patchFile))
+                throw new PatchException(context.getString(R.string.notify_error_not_ups_patch));
+
+            upsCrc = readUpsCrc(context, patchFile);
+            if (upsCrc.getPatchFileCRC() != upsCrc.getRealPatchCRC())
+                throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+
+            patchStream = new BufferedInputStream(new FileInputStream(patchFile));
+            long patchPos = 0;
+            // skip magic
+            for (int i = 0; i < 4; i++) {
+                patchStream.read();
+            }
+            patchPos += 4;
+
+            // decode rom and output size
+            Pair p;
+            p = decode(patchStream);
+            long xSize = p.getValue();
+            patchPos += p.getSize();
+            p = decode(patchStream);
+            long ySize = p.getValue();
+            patchPos += p.getSize();
+
+            long realRomCrc = FileUtils.checksumCRC32(romFile);
+
+            if (romFile.length() == xSize && realRomCrc == upsCrc.getInputFileCRC()) {
+                // xSize, ySize, inCRC, outCRC not change
+            } else if (romFile.length() == ySize && realRomCrc == upsCrc.getOutputFileCRC()) {
+                // swap(xSize, ySize) and swap(inCRC, outCRC)
+                long tmp = xSize;
+                xSize = ySize;
+                ySize = tmp;
+                upsCrc.swapInOut();
+            } else {
+                throw new IOException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+            }
+
+            romStream = new BufferedInputStream(new FileInputStream(romFile));
+            outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));
+            long outPos = 0;
+
+            int x, y;
+            long offset = 0;
+            while (patchPos < patchFile.length() - 12) {
+                p = decode(patchStream);
+                offset += p.getValue();
+                patchPos += p.getSize();
+                if (offset > ySize) continue;
+                Utils.copy(romStream, outputStream, offset - outPos);
+                outPos += offset - outPos;
+                for (long i = offset; i < ySize; i++) {
+                    x = patchStream.read();
+                    patchPos++;
+                    offset++;
+                    if (x == 0x00) break; // chunk terminating byte - 0x00
+                    y = i < xSize ? romStream.read() : 0x00;
+                    outputStream.write(x ^ y);
+                    outPos++;
+                }
+            }
+            // write rom tail and trim
+            Utils.copy(romStream, outputStream, ySize - outPos);
+
+        } finally {
+            IOUtils.closeQuietly(patchStream);
+            IOUtils.closeQuietly(romStream);
+            IOUtils.closeQuietly(outputStream);
+        }
+
+        long realOutCrc = FileUtils.checksumCRC32(outputFile);
+        if (realOutCrc != upsCrc.getOutputFileCRC())
+            throw new PatchException(context.getString(R.string.notify_error_wrong_checksum_after_patching));
+    }
+
+    // decode pointer
+    private Pair decode(BufferedInputStream stream) throws PatchException, IOException {
+        long offset = 0;
+        long size = 0;
+        int shift = 1;
+        int x;
+        while (true) {
+            x = stream.read();
+            if (x == -1)
+                throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+            size++;
+            offset += (x & 0x7fL) * shift;
+            if ((x & 0x80) != 0) break;
+            shift <<= 7;
+            offset += shift;
+        }
+        return new Pair(offset, size);
+    }
+
+    public static boolean checkMagic(File f) throws IOException {
+        FileInputStream stream = null;
+        try {
+            stream = new FileInputStream(f);
+            byte[] buffer = new byte[4];
+            stream.read(buffer);
+            return Arrays.equals(buffer, MAGIC_NUMBER);
+        } finally {
+            IOUtils.closeQuietly(stream);
+        }
+    }
+
+    public static UpsCrc readUpsCrc(Context context, File f) throws PatchException, IOException {
+        BufferedInputStream stream = null;
+        try {
+            stream = new BufferedInputStream(new FileInputStream(f));
+            CRC32 crc = new CRC32();
+            int x;
+            for (long i = f.length() - 12; i != 0; i--) {
+                x = stream.read();
+                if (x == -1)
+                    throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+                crc.update(x);
+            }
+
+            long inputCrc = 0;
+            for (int i = 0; i < 4; i++) {
+                x = stream.read();
+                if (x == -1)
+                    throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+                crc.update(x);
+                inputCrc += ((long) x) << (i * 8);
+            }
+
+            long outputCrc = 0;
+            for (int i = 0; i < 4; i++) {
+                x = stream.read();
+                if (x == -1)
+                    throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+                crc.update(x);
+                outputCrc += ((long) x) << (i * 8);
+            }
+
+            long realPatchCrc = crc.getValue();
+            long patchCrc = readLong(stream);
+            if (patchCrc == -1)
+                throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
+            return new UpsCrc(inputCrc, outputCrc, patchCrc, realPatchCrc);
+        } finally {
+           IOUtils.closeQuietly(stream);
+        }
+    }
+
+    private static long readLong(BufferedInputStream stream) throws IOException {
+        long result = 0;
+        int x;
+        for (int i = 0; i < 4; i++) {
+            x = stream.read();
+            if (x == -1)
+                return -1;
+            result += ((long) x) << (i * 8);
+        }
+        return result;
+    }
+
+    public static class UpsCrc {
+        private long inputFileCRC;
+        private long outputFileCRC;
+        private long patchFileCRC;
+        private long realPatchCRC;
+
+        public UpsCrc(long inputFileCRC, long outputFileCRC, long patchFileCRC, long realPatchCRC) {
+
+            this.inputFileCRC = inputFileCRC;
+            this.outputFileCRC = outputFileCRC;
+            this.patchFileCRC = patchFileCRC;
+            this.realPatchCRC = realPatchCRC;
+        }
+
+        public long getInputFileCRC() {
+            return inputFileCRC;
+        }
+
+        public long getOutputFileCRC() {
+            return outputFileCRC;
+        }
+
+        public long getPatchFileCRC() {
+            return patchFileCRC;
+        }
+
+        public long getRealPatchCRC() {
+            return realPatchCRC;
+        }
+
+        public void swapInOut(){
+            long tmp;
+            tmp = inputFileCRC;
+            inputFileCRC = outputFileCRC;
+            outputFileCRC = tmp;
+        }
+    }
+
+    final class Pair {
+        private final long value;
+        private final long size;
+
+        public Pair(long value, long size) {
+            this.value = value;
+            this.size = size;
+        }
+
+        public long getValue() {
+            return value;
+        }
+
+        public long getSize() {
+            return size;
+        }
+    }
+}

app/src/main/java/org/emunix/unipatcher/patch/XDelta.java

@@ -0,0 +1,99 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.patch;
+
+import android.content.Context;
+
+import org.apache.commons.io.IOUtils;
+import org.emunix.unipatcher.R;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.util.Arrays;
+
+public class XDelta extends Patch {
+
+    private static final int NO_ERROR = 0;
+    private static final int ERR_UNABLE_OPEN_PATCH = -5001;
+    private static final int ERR_UNABLE_OPEN_ROM = -5002;
+    private static final int ERR_UNABLE_OPEN_OUTPUT = -5003;
+    private static final int ERR_WRONG_CHECKSUM = -5010;
+    private static final int ERR_INVALID_INPUT = -17712;
+
+    public static native int xdelta3apply(String patchPath, String romPath, String outputPath);
+
+    public XDelta(Context context, File patch, File rom, File output) {
+        super(context, patch, rom, output);
+    }
+
+    @Override
+    public void apply() throws PatchException, IOException {
+        if (checkXDelta1(patchFile))
+            throw new PatchException(context.getString(R.string.notify_error_xdelta1_unsupported));
+
+        try {
+            System.loadLibrary("xdelta3");
+        } catch (UnsatisfiedLinkError e) {
+            throw new PatchException("Failed to load library libxdelta3.so");
+        }
+
+        int ret = xdelta3apply(patchFile.getPath(), romFile.getPath(), outputFile.getPath());
+
+        switch (ret) {
+            case NO_ERROR:
+                return;
+            case ERR_UNABLE_OPEN_PATCH:
+                throw new PatchException(context.getString(R.string.notify_error_unable_open_file)
+                        .concat(" ").concat(patchFile.getName()));
+            case ERR_UNABLE_OPEN_ROM:
+                throw new PatchException(context.getString(R.string.notify_error_unable_open_file)
+                        .concat(" ").concat(romFile.getName()));
+            case ERR_UNABLE_OPEN_OUTPUT:
+                throw new PatchException(context.getString(R.string.notify_error_unable_open_file)
+                        .concat(" ").concat(outputFile.getName()));
+            case ERR_WRONG_CHECKSUM:
+                throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+            case ERR_INVALID_INPUT:
+                throw new PatchException(context.getString(R.string.notify_error_not_xdelta3_patch));
+            default:
+                throw new PatchException("Unknown error");
+        }
+    }
+
+    public boolean checkXDelta1(File file) throws IOException {
+        String[] MAGIC_XDELTA1 = {"%XDELTA%", "%XDZ000%", "%XDZ001%",
+                "%XDZ002%", "%XDZ003%", "%XDZ004%"};
+
+        FileInputStream stream = null;
+        try {
+            stream = new FileInputStream(file);
+            byte[] magic = new byte[8];
+            stream.read(magic);
+            for (String xdelta1 : MAGIC_XDELTA1) {
+                if (Arrays.equals(magic, xdelta1.getBytes()))
+                    return true;
+            }
+        } finally {
+            IOUtils.closeQuietly(stream);
+        }
+        return false;
+    }
+}

app/src/main/java/org/emunix/unipatcher/tools/RomException.java

@@ -0,0 +1,31 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.tools;
+
+public class RomException extends Exception {
+
+    public RomException() {
+        super();
+    }
+
+    public RomException(String message) {
+        super(message);
+    }
+}

app/src/main/java/org/emunix/unipatcher/tools/SmdFixChecksum.java

@@ -0,0 +1,89 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.tools;
+
+import android.content.Context;
+
+import org.apache.commons.io.IOUtils;
+import org.emunix.unipatcher.R;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+public class SmdFixChecksum {
+
+    private Context context;
+    private File smdFile = null;
+
+    public SmdFixChecksum(Context c, File file) {
+        context = c;
+        smdFile = file;
+    }
+
+    private int calculateChecksum() throws RomException, IOException {
+        long length = smdFile.length();
+        if (length < 514) {
+            throw new RomException(context.getString(R.string.notify_error_not_smd_rom));
+        }
+
+        long sum = 0;
+        BufferedInputStream smdStream = null;
+        try {
+            smdStream = new BufferedInputStream(new FileInputStream(smdFile));
+
+            long c =  IOUtils.skip(smdStream, 512);
+            if (c != 512)
+                throw new IOException("Skip failed");
+
+            int b1, b2;
+            while (c < length) {
+                b1 = smdStream.read();
+                b2 = smdStream.read();
+                if (b1 == -1 || b2 == -1)
+                    throw new RomException(context.getString(R.string.notify_error_unexpected_end_of_file));
+
+                sum += (b1 << 8) + b2;
+                c += 2;
+            }
+        } finally {
+            IOUtils.closeQuietly(smdStream);
+        }
+
+        return (int) sum & 0xffff;
+    }
+
+    public void fixChecksum() throws RomException, IOException {
+        int sum = calculateChecksum();
+
+        RandomAccessFile smdStream = null;
+
+        try {
+            smdStream = new RandomAccessFile(smdFile, "rw");
+            smdStream.seek(0x18e);
+            smdStream.writeByte((sum >> 8) & 0xff);
+            smdStream.writeByte(sum & 0xff);
+        } finally {
+           IOUtils.closeQuietly(smdStream);
+        }
+    }
+}

app/src/main/java/org/emunix/unipatcher/tools/SnesSmcHeader.java

@@ -0,0 +1,125 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.tools;
+
+import android.content.Context;
+
+import org.apache.commons.io.IOUtils;
+import org.emunix.unipatcher.Utils;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.Arrays;
+
+public class SnesSmcHeader {
+
+    private final static int HEADER_SIZE = 512;
+
+    public boolean isHasSmcHeader(File romfile) {
+        long romSize = romfile.length();
+        return (romSize & 0x7fff) == 512;
+    }
+
+    public void deleteSnesSmcHeader(Context context, File romfile) throws IOException, RomException {
+        if (!isHasSmcHeader(romfile)) {
+            throw new RomException();
+        }
+
+        FileInputStream inputRom = null;
+        FileOutputStream outputRom = null;
+        FileOutputStream outputHeader = null;
+        File tmpfile;
+
+        try {
+            tmpfile = File.createTempFile(romfile.getName(), null, romfile.getParentFile());
+            File headerfile = new File(romfile.getPath()+".smc_header");
+
+            inputRom = new FileInputStream(romfile);
+            outputRom = new FileOutputStream(tmpfile);
+            outputHeader = new FileOutputStream(headerfile);
+
+            // write smc header in a file
+            byte[] header = new byte[HEADER_SIZE];
+            int length;
+            length = inputRom.read(header);
+            outputHeader.write(header, 0, length);
+
+            // write headerless rom in tmp file
+            byte[] buffer = new byte[32768];
+            while ((length = inputRom.read(buffer)) > 0) {
+                outputRom.write(buffer, 0, length);
+            }
+        } finally {
+            IOUtils.closeQuietly(inputRom);
+            IOUtils.closeQuietly(outputRom);
+            IOUtils.closeQuietly(outputHeader);
+        }
+
+        Utils.moveFile(context, tmpfile, romfile);
+    }
+
+    public void addSnesSmcHeader(Context context, File romfile, File headerfile) throws IOException, RomException {
+        if (isHasSmcHeader(romfile)) {
+            throw new RomException();
+        }
+
+        FileInputStream inputRom = null;
+        FileInputStream inputHeader = null;
+        FileOutputStream outputRom = null;
+        File tmpfile;
+
+        try {
+            tmpfile = File.createTempFile(romfile.getName(), null, romfile.getParentFile());
+
+            inputRom = new FileInputStream(romfile);
+            outputRom = new FileOutputStream(tmpfile);
+
+            // write header to tmp file
+            byte[] header = new byte[HEADER_SIZE];
+            int length;
+            if (headerfile == null) {
+                Arrays.fill(header, (byte) 0);
+                length = HEADER_SIZE;
+            } else {
+                inputHeader = new FileInputStream(headerfile);
+                length = inputHeader.read(header);
+            }
+            outputRom.write(header, 0, length);
+
+            // write headerless rom in tmp file
+            byte[] buffer = new byte[32768];
+            while ((length = inputRom.read(buffer)) > 0) {
+                outputRom.write(buffer, 0, length);
+            }
+        } finally {
+            IOUtils.closeQuietly(inputRom);
+            IOUtils.closeQuietly(inputHeader);
+            IOUtils.closeQuietly(outputRom);
+        }
+
+        Utils.moveFile(context, tmpfile, romfile);
+    }
+
+    public void addSnesSmcHeader(Context context, File romfile) throws IOException, RomException {
+        addSnesSmcHeader(context, romfile, null);
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/activity/FilePickerActivity.java

@@ -0,0 +1,440 @@
+/*
+Copyright (C) 2013, 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.activity;
+
+import android.Manifest;
+import android.app.Activity;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.os.Environment;
+import android.support.annotation.NonNull;
+import android.support.v4.app.ActivityCompat;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.Toolbar;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.afollestad.materialdialogs.MaterialDialog;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.FilenameUtils;
+import org.emunix.unipatcher.Globals;
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.Utils;
+import org.emunix.unipatcher.ad.AdMobController;
+import org.emunix.unipatcher.ui.adapter.FilePickerAdapter;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+import java.util.zip.CRC32;
+
+
+public class FilePickerActivity extends AppCompatActivity implements FilePickerAdapter.OnItemClickListener {
+
+    private AdMobController ad;
+    private RecyclerView list;
+    private FilePickerAdapter listAdapter;
+    private TextView permissionErrorText;
+
+    private TextView crc32;
+    private TextView md5;
+    private TextView sha1;
+
+    private List<FileEntry> fileList = new ArrayList<>();
+    private File currentDir;
+    private String savedCurrentDir;
+    private String intentDir;
+
+    private static final int REQUEST_PERMISSION_WRITE_STORAGE = 1;
+
+    private static final String CRC32 = "CRC32";
+    private static final String MD5 = "MD5";
+    private static final String SHA1 = "SHA-1";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_file_picker);
+
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        try {
+            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+        } catch (NullPointerException e) {/* empty */} // TODO log
+
+        String title = getIntent().getStringExtra("title");
+        if (title == null)
+            title = getString(R.string.file_picker_activity_title);
+        getSupportActionBar().setTitle(title);
+
+        intentDir = getIntent().getStringExtra("directory");
+
+        if (savedInstanceState != null) {
+            savedCurrentDir = savedInstanceState.getString("currentDirectory");
+        }
+
+        permissionErrorText = (TextView) findViewById(R.id.empty_view);
+
+        list = (RecyclerView) findViewById(R.id.list);
+        try {
+            list.setHasFixedSize(true);
+        } catch (NullPointerException e) {/* TODO log */}
+        RecyclerView.LayoutManager listLayoutManager = new LinearLayoutManager(this);
+        list.setLayoutManager(listLayoutManager);
+        listAdapter = new FilePickerAdapter(fileList);
+        list.setAdapter(listAdapter);
+        listAdapter.setOnItemClickListener(this);
+
+        requestStoragePermission();
+
+        // Load ads
+        if (!Globals.isFullVersion()) {
+            FrameLayout adView = (FrameLayout) findViewById(R.id.adView);
+            ad = new AdMobController(this, adView);
+            if (!Utils.isOnline(this))
+                ad.show(false);
+        }
+    }
+
+    @Override
+    public void onItemClick(View view, int position) {
+        if (position < 0 || position > fileList.size()) // fix 'fast tapping' crash
+            return;
+
+        String fileName = fileList.get(position).getName();
+        if (position == 0 && fileName.equals("..")) {
+            browseTo(currentDir.getParentFile());
+        } else {
+            browseTo(new File(currentDir.getPath() + File.separator + fileName));
+        }
+    }
+
+    @Override
+    public void onItemLongClick(View view, int position) {
+        String fileName = currentDir.getPath() + File.separator + fileList.get(position).getName();
+        showFileDetails(fileName);
+    }
+
+    private void readListOfFiles() {
+        if (savedCurrentDir != null) {
+            currentDir = new File(savedCurrentDir);
+        } else if (intentDir == null) {
+            currentDir = getExternalOrRoot();
+        } else {
+            currentDir = new File(intentDir);
+        }
+
+        if (!currentDir.canRead()) {
+            String err = getString(R.string.file_picker_activity_error_unable_read_dir);
+            err = String.format(err, currentDir.getAbsolutePath());
+            Toast.makeText(this, err, Toast.LENGTH_SHORT).show();
+
+            currentDir = getExternalOrRoot();
+        }
+
+        browseTo(currentDir);
+    }
+
+    private File getExternalOrRoot() {
+        Boolean isSDPresent = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
+        if (isSDPresent) {
+            return Environment.getExternalStorageDirectory().getAbsoluteFile();
+        } else {
+            return new File("/");
+        }
+    }
+
+    private static File[] sortFiles(File[] files) {
+        Comparator<File> comp = new Comparator<File>() {
+            public int compare(File f1, File f2) {
+                if (f1.isDirectory() && !f2.isDirectory()) {
+                    return -1;
+                } else if (!f1.isDirectory() && f2.isDirectory()) {
+                    return 1;
+                } else {
+                    return f1.compareTo(f2);
+                }
+            }
+        };
+        Arrays.sort(files, comp);
+        return files;
+    }
+
+    private void browseTo(final File dir) {
+        if (dir.isDirectory()) {
+            currentDir = dir;
+            fillFileList(sortFiles(dir.listFiles()));
+        } else {
+            Intent intent = new Intent();
+            intent.putExtra("path", dir.getAbsolutePath());
+            setResult(Activity.RESULT_OK, intent);
+            finish();
+        }
+    }
+
+    private void fillFileList(File[] files) {
+        int size = fileList.size();
+        fileList.clear();
+        listAdapter.notifyItemRangeRemoved(0, size);
+
+        FileEntry entry;
+
+        if (currentDir.getParent() != null && currentDir.getParentFile().canRead()) {
+            entry = new FileEntry();
+            entry.setIcon(R.drawable.ic_folder_upload_grey600_24dp);
+            entry.setName("..");
+            fileList.add(entry);
+        }
+
+        for (File file : files) {
+            if (file.isHidden() || !file.canRead())
+                continue;
+            if (file.isDirectory()) {
+                entry = new FileEntry();
+                entry.setIcon(R.drawable.ic_folder_grey600_24dp);
+                entry.setName(file.getName());
+                fileList.add(entry);
+            } else {
+                entry = new FileEntry();
+                if (Utils.isPatch(file)){
+                    entry.setIcon(R.drawable.ic_healing_grey600_24dp);
+                } else {
+                    entry.setIcon(R.drawable.ic_insert_drive_file_grey600_24dp);
+                }
+                entry.setName(file.getName());
+                fileList.add(entry);
+            }
+        }
+
+        listAdapter.notifyItemRangeInserted(0, fileList.size());
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                // This is called when the Home (Up) button is pressed in the Action Bar.
+                finish();
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle savedInstanceState) {
+        super.onSaveInstanceState(savedInstanceState);
+        if (Utils.hasStoragePermission(this))
+            savedInstanceState.putString("currentDirectory", currentDir.getAbsolutePath());
+    }
+
+    @Override
+    public void onPause() {
+        if (ad != null) {
+            ad.pause();
+        }
+        super.onPause();
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (ad != null) {
+            ad.resume();
+        }
+    }
+
+    @Override
+    public void onDestroy() {
+        if (ad != null) {
+            ad.destroy();
+        }
+        super.onDestroy();
+    }
+
+    private void requestStoragePermission() {
+        if (!Utils.hasStoragePermission(this)) {
+            ActivityCompat.requestPermissions(this,
+                    new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
+                    REQUEST_PERMISSION_WRITE_STORAGE);
+        } else {
+            readListOfFiles();
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode,
+                                           @NonNull String[] permissions,
+                                           @NonNull int[] grantResults) {
+        if (requestCode == REQUEST_PERMISSION_WRITE_STORAGE) {
+            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                showPermissionError(false);
+                readListOfFiles();
+            } else {
+                showPermissionError(true);
+            }
+        }
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+    }
+
+    private void showPermissionError(boolean on) {
+        if (on) {
+            list.setVisibility(View.GONE);
+            if (ad != null)
+                ad.show(false);
+            permissionErrorText.setVisibility(View.VISIBLE);
+        } else {
+            permissionErrorText.setVisibility(View.GONE);
+            if (ad != null)
+                ad.show(true);
+            list.setVisibility(View.VISIBLE);
+        }
+    }
+
+    private void showFileDetails(String filename) {
+        MaterialDialog dialog = new MaterialDialog.Builder(this)
+                .title(R.string.file_properties_dialog_title)
+                .customView(R.layout.fragment_file_details, true)
+                .negativeText(R.string.file_properties_dialog_close_button)
+                .build();
+
+        TextView name = (TextView) dialog.getCustomView().findViewById(R.id.name_value);
+        name.setText(FilenameUtils.getName(filename));
+
+        TextView path = (TextView) dialog.getCustomView().findViewById(R.id.path_value);
+        path.setText(FilenameUtils.getPath(filename));
+
+        File file = new File(filename);
+        long filesize = file.length();
+
+        TextView size = (TextView) dialog.getCustomView().findViewById(R.id.size_value);
+        String svFmt = getString(R.string.file_properties_dialog_size_value);
+        size.setText(String.format(svFmt, FileUtils.byteCountToDisplaySize(filesize), filesize));
+
+        crc32 = (TextView) dialog.getCustomView().findViewById(R.id.crc32_value);
+        md5 = (TextView) dialog.getCustomView().findViewById(R.id.md5_value);
+        sha1 = (TextView) dialog.getCustomView().findViewById(R.id.sha1_value);
+        new FileChecksumsTask().execute(file);
+
+        dialog.show();
+    }
+
+    static public class FileEntry {
+        private int icon;
+        private String name;
+
+        public int getIcon() {
+            return icon;
+        }
+
+        public void setIcon(int icon) {
+            this.icon = icon;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+    }
+
+    private class FileChecksumsTask extends AsyncTask<File, Void, HashMap<String, String>> {
+        @Override
+        protected HashMap<String, String> doInBackground(File... params) {
+            HashMap<String, String> checksum = null;
+            try {
+                if (params.length > 0)
+                    checksum = getFileChecksums(params[0]);
+            } catch (NoSuchAlgorithmException | IOException | IllegalArgumentException e) {
+                e.printStackTrace();
+            }
+            return checksum;
+        }
+
+        @Override
+        protected void onPostExecute(HashMap<String, String> result) {
+            super.onPostExecute(result);
+            if (result != null) {
+                crc32.setText(result.get(CRC32));
+                md5.setText(result.get(MD5));
+                sha1.setText(result.get(SHA1));
+            } else {
+                crc32.setText("-");
+                md5.setText("-");
+                sha1.setText("-");
+            }
+        }
+
+        private HashMap<String, String> getFileChecksums(File file) throws IOException, NoSuchAlgorithmException, IllegalArgumentException
+        {
+            if (file.isDirectory())
+                throw new IllegalArgumentException("Unable calculate checksum for directory");
+
+            FileInputStream fis = new FileInputStream(file);
+
+            CRC32 crc32Digest = new CRC32();
+            MessageDigest md5Digest = MessageDigest.getInstance("MD5");
+            MessageDigest sha1Digest = MessageDigest.getInstance("SHA-1");
+
+            byte[] byteArray = new byte[32768];
+            int bytesCount = 0;
+            while ((bytesCount = fis.read(byteArray)) != -1) {
+                crc32Digest.update(byteArray, 0, bytesCount);
+                md5Digest.update(byteArray, 0, bytesCount);
+                sha1Digest.update(byteArray, 0, bytesCount);
+            }
+            fis.close();
+
+            String crc32 = Long.toHexString(crc32Digest.getValue());
+            String md5 = bytesToHexString(md5Digest.digest());
+            String sha1 = bytesToHexString(sha1Digest.digest());
+
+            HashMap<String, String> checksum = new HashMap<>();
+            checksum.put(CRC32, crc32);
+            checksum.put(MD5, md5);
+            checksum.put(SHA1, sha1);
+            return checksum;
+        }
+
+        private String bytesToHexString(byte[] bytes) {
+            StringBuilder sb = new StringBuilder();
+            for(int i = 0; i < bytes.length ;i++) {
+                sb.append(Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1));
+            }
+            return sb.toString();
+        }
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/activity/HelpActivity.java

@@ -0,0 +1,110 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.activity;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.support.design.widget.TabLayout;
+import android.support.v4.view.PagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.widget.Toast;
+
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.ui.adapter.HelpPagerAdapter;
+
+public class HelpActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_help);
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+
+        TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
+        tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.help_activity_faq_tab_title)));
+        tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.help_activity_changelog_tab_title)));
+        tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.help_activity_about_tab_title)));
+        tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
+
+        final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
+        final PagerAdapter adapter = new HelpPagerAdapter(getSupportFragmentManager(), tabLayout.getTabCount());
+        viewPager.setAdapter(adapter);
+        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
+        tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
+            @Override
+            public void onTabSelected(TabLayout.Tab tab) {
+                viewPager.setCurrentItem(tab.getPosition());
+            }
+
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+
+            }
+
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {
+
+            }
+        });
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.activity_help, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                finish();
+                return true;
+            case R.id.action_send_feedback:
+                sendFeedback();
+                return true;
+            case R.id.action_visit_website:
+                Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.app_site)));
+                startActivity(browserIntent);
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private void sendFeedback() {
+        Intent feedbackIntent = new Intent(Intent.ACTION_SEND);
+        feedbackIntent.setType("message/rfc822");
+        feedbackIntent.putExtra(Intent.EXTRA_EMAIL, new String[]{getString(R.string.app_email)});
+        feedbackIntent.putExtra(Intent.EXTRA_SUBJECT, getString(R.string.app_name));
+        try {
+            startActivity(Intent.createChooser(feedbackIntent, getString(R.string.send_feedback_dialog_title)));
+        } catch (android.content.ActivityNotFoundException ex) {
+            Toast.makeText(this, R.string.send_feedback_error_no_email_apps, Toast.LENGTH_SHORT).show();
+        }
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/activity/MainActivity.java

@@ -0,0 +1,271 @@
+/*
+Copyright (C) 2013-2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.activity;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Handler;
+import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.NavigationView;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentTransaction;
+import android.support.v4.view.GravityCompat;
+import android.support.v4.widget.DrawerLayout;
+import android.support.v7.app.ActionBarDrawerToggle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.util.Log;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.Toast;
+
+import com.anjlab.android.iab.v3.BillingProcessor;
+import com.anjlab.android.iab.v3.TransactionDetails;
+import com.google.firebase.analytics.FirebaseAnalytics;
+
+import org.emunix.unipatcher.BuildConfig;
+import org.emunix.unipatcher.Globals;
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.Utils;
+import org.emunix.unipatcher.ad.AdMobController;
+import org.emunix.unipatcher.ui.dialog.RateThisApp;
+import org.emunix.unipatcher.ui.fragment.ActionFragment;
+import org.emunix.unipatcher.ui.fragment.PatchingFragment;
+import org.emunix.unipatcher.ui.fragment.SmdFixChecksumFragment;
+import org.emunix.unipatcher.ui.fragment.SnesSmcHeaderFragment;
+
+public class MainActivity extends AppCompatActivity
+     implements NavigationView.OnNavigationItemSelectedListener {
+    private static final String LOG_TAG = "org.emunix.unipatcher";
+
+    private static final String SKU_FULL = "full";
+    private static final String SKU_REMOVE_ADS = "ad";
+    private boolean readyToPurchase = false;
+    private BillingProcessor bp;
+    private AdMobController ad;
+    private FirebaseAnalytics firebaseAnalytics;
+    private Context context;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        context = this;
+        setContentView(R.layout.activity_main);
+
+        firebaseAnalytics = FirebaseAnalytics.getInstance(this);
+        if (BuildConfig.DEBUG)
+            firebaseAnalytics.setAnalyticsCollectionEnabled(false);
+
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+
+        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
+        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
+                this, drawer, toolbar, R.string.nav_drawer_open, R.string.nav_drawer_close);
+        drawer.addDrawerListener(toggle);
+        toggle.syncState();
+
+        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
+        fab.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                FragmentManager fragmentManager = getSupportFragmentManager();
+                ActionFragment fragment = (ActionFragment) fragmentManager.findFragmentById(R.id.content_frame);
+                if (fragment != null){
+                    boolean ret = fragment.runAction();
+                }
+                //Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
+                //        .setAction("Action", null).show();
+            }
+        });
+
+        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
+        navigationView.setNavigationItemSelectedListener(this);
+
+        if (savedInstanceState == null) {
+            selectDrawerItem(0);
+        }
+
+        parseArgument();
+        bp = new BillingProcessor(this, Globals.getKey(), new BillingProcessor.IBillingHandler() {
+            @Override
+            public void onBillingInitialized() {
+                Log.d(LOG_TAG, "Billing initialized");
+                readyToPurchase = true;
+                if (bp.isPurchased(SKU_FULL) || bp.isPurchased(SKU_REMOVE_ADS)) {
+                    setFullVersion();
+                }
+            }
+            @Override
+            public void onProductPurchased(String productId, TransactionDetails details) {
+                Log.d(LOG_TAG, "Item purchased: " + productId);
+                complain(getString(R.string.purchase_successful));
+                setFullVersion();
+            }
+            @Override
+            public void onBillingError(int errorCode, Throwable error) {
+                if (errorCode != 110) // cancel purchase
+                    complain("Billing error: " + Integer.toString(errorCode));
+            }
+            @Override
+            public void onPurchaseHistoryRestored() {
+                for(String sku : bp.listOwnedProducts())
+                    Log.d(LOG_TAG, "Owned Managed Product: " + sku);
+                if (bp.isPurchased(SKU_FULL) || bp.isPurchased(SKU_REMOVE_ADS)) {
+                    setFullVersion();
+                }
+            }
+        });
+        RateThisApp.launch(this);
+
+        // Load ads
+        if (!Globals.isFullVersion()) {
+            Handler adHandler = new Handler();
+            adHandler.postDelayed(new Runnable() {
+                @Override
+                public void run() {
+                    FrameLayout adView = (FrameLayout) findViewById(R.id.adView);
+                    ad = new AdMobController(context, adView);
+                    if (!Utils.isOnline(context))
+                        ad.show(false);
+                }
+            }, 1000);
+        }
+    }
+
+    @Override
+    public boolean onNavigationItemSelected(MenuItem item) {
+        int id = item.getItemId();
+
+        if (id == R.id.nav_apply_patch) {
+            selectDrawerItem(0);
+        } else if (id == R.id.nav_smd_fix_checksum) {
+            selectDrawerItem(1);
+        } else if (id == R.id.nav_snes_add_del_smc_header) {
+            selectDrawerItem(2);
+        }
+
+        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
+        drawer.closeDrawer(GravityCompat.START);
+
+        if (id == R.id.nav_settings) {
+            Intent settingsIntent = new Intent(this, SettingsActivity.class);
+            startActivity(settingsIntent);
+        } else if (id == R.id.nav_rate) {
+            RateThisApp.rate(this);
+        } else if (id == R.id.nav_buy) {
+            buyFullVersion();
+        } else if (id == R.id.nav_share) {
+            shareApp();
+        } else if (id == R.id.nav_help) {
+            Intent helpIntent = new Intent(this, HelpActivity.class);
+            startActivity(helpIntent);
+        }
+
+        return true;
+    }
+
+    private void selectDrawerItem(int position) {
+        // update the main content by replacing fragments
+        Fragment fragment;
+        switch (position) {
+            case 1: fragment = new SmdFixChecksumFragment(); break;
+            case 2: fragment = new SnesSmcHeaderFragment(); break;
+            default: fragment = new PatchingFragment();
+        }
+
+        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
+        ft.setCustomAnimations(R.anim.slide_from_bottom, android.R.anim.fade_out);
+        ft.replace(R.id.content_frame, fragment).commit();
+    }
+
+    private void parseArgument() {
+        try {
+            String arg = getIntent().getData().getPath();
+            Globals.setCmdArgument(arg);
+            Log.d(LOG_TAG, "Cmd argument: " + arg);
+        } catch (NullPointerException e) {
+            Log.e(LOG_TAG, "NullPointerException in argument fetching");
+        }
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data){
+        Log.d(LOG_TAG, "onActivityResult(" + requestCode + "," + resultCode + "," + data);
+        if (!bp.handleActivityResult(requestCode, resultCode, data))
+            super.onActivityResult(requestCode, resultCode, data);
+    }
+
+    private void shareApp() {
+        Intent shareIntent = new Intent(Intent.ACTION_SEND);
+        shareIntent.setType("text/plain");
+        shareIntent.putExtra(Intent.EXTRA_SUBJECT, getString(R.string.app_name));
+        shareIntent.putExtra(Intent.EXTRA_TEXT, getString(R.string.share_text) + "https://play.google.com/store/apps/details?id=org.eminix.unipatcher");
+        startActivity(Intent.createChooser(shareIntent, getString(R.string.share_dialog_title)));
+    }
+
+    private void buyFullVersion() {
+        if (readyToPurchase)
+            bp.purchase(this, SKU_REMOVE_ADS);
+        else
+            complain("Billing not initialized.");
+    }
+
+    private void setFullVersion() {
+        Globals.setFullVersion();
+        if (ad != null)
+            ad.show(false);
+    }
+
+    private void complain(String message) {
+        Log.d(LOG_TAG, message);
+        Toast.makeText(this, message, Toast.LENGTH_LONG).show();
+    }
+
+    @Override
+    public void onPause() {
+        if (ad != null) {
+            ad.pause();
+        }
+        super.onPause();
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (ad != null) {
+            ad.resume();
+        }
+    }
+
+    @Override
+    public void onDestroy() {
+        if (bp != null) {
+            bp.release();
+        }
+        if (ad != null) {
+            ad.destroy();
+        }
+        super.onDestroy();
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/activity/SettingsActivity.java

@@ -0,0 +1,55 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.activity;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.MenuItem;
+
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.ui.fragment.SettingsFragment;
+
+public class SettingsActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_settings);
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+
+        getSupportFragmentManager().beginTransaction()
+                .replace(R.id.content, new SettingsFragment())
+                .commit();
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                finish();
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/adapter/FilePickerAdapter.java

@@ -0,0 +1,99 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.adapter;
+
+import android.graphics.Typeface;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.ui.activity.FilePickerActivity;
+
+import java.util.List;
+
+public class FilePickerAdapter extends RecyclerView.Adapter<FilePickerAdapter.ViewHolder> {
+    private List<FilePickerActivity.FileEntry> data;
+    private static OnItemClickListener listener;
+
+    public interface OnItemClickListener {
+        void onItemClick(View v, int position);
+        void onItemLongClick(View v, int position);
+    }
+
+    public void setOnItemClickListener(OnItemClickListener listener) {
+        FilePickerAdapter.listener = listener;
+    }
+
+    public static class ViewHolder extends RecyclerView.ViewHolder {
+        private TextView name;
+        private ImageView icon;
+
+        public ViewHolder(final View view) {
+            super(view);
+            name = (TextView) view.findViewById(R.id.row_text);
+            icon = (ImageView) view.findViewById(R.id.row_image);
+            view.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    if (listener != null)
+                        listener.onItemClick(view, getLayoutPosition());
+                }
+            });
+
+            view.setOnLongClickListener(new View.OnLongClickListener() {
+                @Override
+                public boolean onLongClick(View v) {
+                    if (listener != null)
+                        listener.onItemLongClick(view, getLayoutPosition());
+                    return true;
+                }
+            });
+
+            Typeface roboto_light = Typeface.createFromAsset(name.getContext().getAssets(), "fonts/Roboto-Light.ttf");
+            name.setTypeface(roboto_light);
+        }
+    }
+
+    public FilePickerAdapter(List<FilePickerActivity.FileEntry> data) {
+        this.data = data;
+    }
+
+    @Override
+    public FilePickerAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.file_picker_row_item, parent, false);
+        return new ViewHolder(v);
+    }
+
+    @Override
+    public void onBindViewHolder(ViewHolder holder, int position) {
+        FilePickerActivity.FileEntry entry = data.get(position);
+        holder.name.setText(entry.getName());
+        holder.icon.setImageResource(entry.getIcon());
+    }
+
+    @Override
+    public int getItemCount() {
+        return data.size();
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/adapter/HelpPagerAdapter.java

@@ -0,0 +1,59 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.adapter;
+
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentStatePagerAdapter;
+
+import org.emunix.unipatcher.ui.fragment.AboutFragment;
+import org.emunix.unipatcher.ui.fragment.ChangelogFragment;
+import org.emunix.unipatcher.ui.fragment.FaqFragment;
+
+public class HelpPagerAdapter extends FragmentStatePagerAdapter {
+    int numOfTabs;
+
+    public HelpPagerAdapter(FragmentManager manager, int numOfTabs) {
+        super(manager);
+        this.numOfTabs = numOfTabs;
+    }
+
+    @Override
+    public Fragment getItem(int position) {
+        switch (position) {
+            case 0:
+                FaqFragment tab1 = new FaqFragment();
+                return tab1;
+            case 1:
+                ChangelogFragment tab2 = new ChangelogFragment();
+                return tab2;
+            case 2:
+                AboutFragment tab3 = new AboutFragment();
+                return tab3;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    public int getCount() {
+        return numOfTabs;
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/dialog/RateThisApp.java

@@ -0,0 +1,89 @@
+/*
+Copyright (C) 2013 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.dialog;
+
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.net.Uri;
+import android.support.v7.app.AlertDialog;
+
+import org.emunix.unipatcher.R;
+
+public class RateThisApp {
+
+    private final static int LAUNCHES_UNTIL_PROMPT = 7;
+
+    public static void launch(Context context) {
+        SharedPreferences preferences = context.getSharedPreferences("RateThisApp", 0);
+        if (preferences.getBoolean("dont_show_again", false))
+            return;
+
+        SharedPreferences.Editor editor = preferences.edit();
+        long launchCount = preferences.getLong("launch_count", 0) + 1;
+        editor.putLong("launch_count", launchCount);
+
+        if (launchCount % LAUNCHES_UNTIL_PROMPT == 0)
+            showDialog(context);
+
+        editor.apply();
+    }
+
+    public static void rate(Context context) {
+        String packageName = context.getApplicationContext().getPackageName();
+        Intent rateAppIntent = new Intent(Intent.ACTION_VIEW);
+        rateAppIntent.setData(Uri.parse("market://details?id=" + packageName));
+        if (context.getPackageManager().queryIntentActivities(rateAppIntent, 0).size() == 0) {
+            // Market app is not installed. Open web browser
+            rateAppIntent.setData(Uri.parse("https://play.google.com/store/apps/details?id=" + packageName));
+        }
+        context.startActivity(rateAppIntent);
+        dontShowDialogAgain(context);
+    }
+
+    private static void showDialog(final Context context) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        builder.setTitle(R.string.rate_dialog_title);
+        builder.setMessage(R.string.rate_dialog_message);
+        builder.setPositiveButton(R.string.rate_dialog_ok, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialogInterface, int i) {
+                rate(context);
+            }
+        });
+
+        builder.setNegativeButton(R.string.rate_dialog_later, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialogInterface, int i) {
+                dialogInterface.cancel();
+            }
+        });
+        AlertDialog dialog = builder.create();
+        dialog.show();
+    }
+
+    private static void dontShowDialogAgain(Context context) {
+        SharedPreferences preferences = context.getSharedPreferences("RateThisApp", 0);
+        SharedPreferences.Editor editor = preferences.edit();
+        editor.putBoolean("dont_show_again", true);
+        editor.apply();
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/fragment/AboutFragment.java

@@ -0,0 +1,49 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.fragment;
+
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.Utils;
+import org.sufficientlysecure.htmltextview.HtmlResImageGetter;
+import org.sufficientlysecure.htmltextview.HtmlTextView;
+
+public class AboutFragment extends Fragment {
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_about, container, false);
+
+        TextView versionText = (TextView) view.findViewById(R.id.versionText);
+        versionText.setText(getString(R.string.help_activity_about_tab_version, Utils.getAppVersion(getActivity())));
+        HtmlTextView aboutText = (HtmlTextView) view.findViewById(R.id.aboutText);
+        aboutText.setHtml(R.raw.about, new HtmlResImageGetter(aboutText));
+
+        return view;
+    }
+
+}

app/src/main/java/org/emunix/unipatcher/ui/fragment/ActionFragment.java

@@ -0,0 +1,28 @@
+/*
+Copyright (C) 2014, 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.fragment;
+
+import android.support.v4.app.Fragment;
+
+public abstract class ActionFragment extends Fragment {
+
+    public abstract boolean runAction();
+}
+

app/src/main/java/org/emunix/unipatcher/ui/fragment/ChangelogFragment.java

@@ -0,0 +1,49 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.fragment;
+
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.emunix.unipatcher.R;
+import org.sufficientlysecure.htmltextview.HtmlResImageGetter;
+import org.sufficientlysecure.htmltextview.HtmlTextView;
+
+public class ChangelogFragment extends Fragment {
+
+    public ChangelogFragment() {
+        // Required empty public constructor
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_changelog, container, false);
+
+        HtmlTextView changelogText = (HtmlTextView) view.findViewById(R.id.changelogText);
+        changelogText.setHtml(R.raw.changelog, new HtmlResImageGetter(changelogText));
+
+        return view;
+    }
+
+}

app/src/main/java/org/emunix/unipatcher/ui/fragment/FaqFragment.java

@@ -0,0 +1,45 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.fragment;
+
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.emunix.unipatcher.R;
+import org.sufficientlysecure.htmltextview.HtmlResImageGetter;
+import org.sufficientlysecure.htmltextview.HtmlTextView;
+
+public class FaqFragment extends Fragment {
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_faq, container, false);
+
+        HtmlTextView faqText = (HtmlTextView) view.findViewById(R.id.faqText);
+        faqText.setHtml(R.raw.faq, new HtmlResImageGetter(faqText));
+
+        return view;
+    }
+
+}

app/src/main/java/org/emunix/unipatcher/ui/fragment/PatchingFragment.java

@@ -0,0 +1,268 @@
+/*
+Copyright (C) 2014, 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.fragment;
+
+import android.app.Activity;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.graphics.Typeface;
+import android.os.Bundle;
+import android.support.v7.app.AlertDialog;
+import android.support.v7.widget.CardView;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.EditText;
+import android.widget.FrameLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import org.apache.commons.io.FilenameUtils;
+import org.emunix.unipatcher.Globals;
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.Settings;
+import org.emunix.unipatcher.Utils;
+import org.emunix.unipatcher.WorkerService;
+import org.emunix.unipatcher.ui.activity.FilePickerActivity;
+
+import java.io.File;
+
+public class PatchingFragment extends ActionFragment implements View.OnClickListener {
+
+    private static final String LOG_TAG = "org.emunix.unipatcher";
+
+    private static final int SELECT_ROM_FILE = 1;
+    private static final int SELECT_PATCH_FILE = 2;
+    private TextView romNameTextView;
+    private TextView patchNameTextView;
+    private TextView outputNameTextView;
+    private String romPath = null;
+    private String patchPath = null;
+    private String outputPath = null;
+
+    public PatchingFragment() {}
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.patching_fragment, container, false);
+
+        romNameTextView = (TextView) view.findViewById(R.id.romNameTextView);
+        patchNameTextView = (TextView) view.findViewById(R.id.patchNameTextView);
+        outputNameTextView = (TextView) view.findViewById(R.id.outputNameTextView);
+
+        CardView patchCardView = (CardView) view.findViewById(R.id.patchCardView);
+        patchCardView.setOnClickListener(this);
+        CardView romCardView = (CardView) view.findViewById(R.id.romCardView);
+        romCardView.setOnClickListener(this);
+        CardView outputCardView = (CardView) view.findViewById(R.id.outputCardView);
+        outputCardView.setOnClickListener(this);
+
+        restoreState(savedInstanceState);
+
+        setFonts(view);
+
+        // Set action bar title
+        getActivity().setTitle(R.string.nav_apply_patch);
+
+        return view;
+    }
+
+    public void onActivityCreated(Bundle savedInstanceState) {
+        super.onActivityCreated(savedInstanceState);
+        parseArgument();
+    }
+
+    private void parseArgument() {
+        patchPath = Globals.getCmdArgument();
+        if (patchPath != null) {
+            patchNameTextView.setText(new File(patchPath).getName());
+        }
+    }
+
+    private void setFonts(View view) {
+        TextView patchLabel = (TextView) view.findViewById(R.id.patchLabel);
+        TextView romLabel = (TextView) view.findViewById(R.id.romLabel);
+        TextView outputLabel = (TextView) view.findViewById(R.id.outputLabel);
+
+        Typeface roboto_light = Typeface.createFromAsset(getActivity().getAssets(), "fonts/Roboto-Light.ttf");
+
+        patchLabel.setTypeface(roboto_light);
+        romLabel.setTypeface(roboto_light);
+        outputLabel.setTypeface(roboto_light);
+        patchNameTextView.setTypeface(roboto_light);
+        romNameTextView.setTypeface(roboto_light);
+        outputNameTextView.setTypeface(roboto_light);
+    }
+
+    private void restoreState(Bundle savedInstanceState) {
+        if (savedInstanceState != null){
+            romPath = savedInstanceState.getString("romPath");
+            patchPath = savedInstanceState.getString("patchPath");
+            outputPath = savedInstanceState.getString("outputPath");
+            if (romPath != null)
+                romNameTextView.setText(new File(romPath).getName());
+            if (patchPath != null)
+                patchNameTextView.setText(new File (patchPath).getName());
+            if (outputPath != null)
+                outputNameTextView.setText(new File(outputPath).getName());
+        }
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle savedInstanceState) {
+        super.onSaveInstanceState(savedInstanceState);
+        savedInstanceState.putString("romPath", romPath);
+        savedInstanceState.putString("patchPath", patchPath);
+        savedInstanceState.putString("outputPath", outputPath);
+    }
+
+    @Override
+    public void onClick(View view){
+        Intent intent = new Intent(getActivity(), FilePickerActivity.class);
+        switch (view.getId()) {
+            case R.id.patchCardView:
+                intent.putExtra("title", getString(R.string.file_picker_activity_title_select_patch));
+                intent.putExtra("directory", Settings.getPatchDir(getActivity()));
+                startActivityForResult(intent, SELECT_PATCH_FILE);
+                break;
+            case R.id.romCardView:
+                intent.putExtra("title", getString(R.string.file_picker_activity_title_select_rom));
+                intent.putExtra("directory", Settings.getRomDir(getActivity()));
+                startActivityForResult(intent, SELECT_ROM_FILE);
+                break;
+            case R.id.outputCardView:
+                renameOutputRom();
+                break;
+        }
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data){
+        Log.d(LOG_TAG, "onActivityResult(" + requestCode + "," + resultCode + "," + data);
+        if (resultCode == Activity.RESULT_OK) {
+            String path = data.getStringExtra("path");
+            File fpath = new File(path);
+
+            if (Utils.isArchive(path)) {
+                Toast.makeText(getActivity(), R.string.main_activity_toast_archives_not_supported, Toast.LENGTH_LONG).show();
+            }
+
+            switch (requestCode) {
+                    case SELECT_ROM_FILE:
+                        romPath = path;
+                        romNameTextView.setVisibility(View.VISIBLE);
+                        romNameTextView.setText(fpath.getName());
+                        Settings.setLastRomDir(getActivity(), fpath.getParent());
+                        outputPath = makeOutputPath(path);
+                        outputNameTextView.setText(new File(outputPath).getName());
+                        break;
+                    case SELECT_PATCH_FILE:
+                        patchPath = path;
+                        patchNameTextView.setVisibility(View.VISIBLE);
+                        patchNameTextView.setText(fpath.getName());
+                        Settings.setLastPatchDir(getActivity(), fpath.getParent());
+                        break;
+            }
+        }
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+
+    private String makeOutputPath(String fullname) {
+        String dir = FilenameUtils.getPath(fullname);
+        String baseName = FilenameUtils.getBaseName(fullname);
+        String ext = FilenameUtils.getExtension(fullname);
+        return FilenameUtils.concat(dir, baseName.concat(" [patched].").concat(ext));
+    }
+
+    public boolean runAction(){
+        if (romPath == null & patchPath == null){
+            Toast.makeText(getActivity(), getString(R.string.main_activity_toast_rom_and_patch_not_selected), Toast.LENGTH_LONG).show();
+            return false;
+        } else if (romPath == null){
+            Toast.makeText(getActivity(), getString(R.string.main_activity_toast_rom_not_selected), Toast.LENGTH_LONG).show();
+            return false;
+        } else if (patchPath == null){
+            Toast.makeText(getActivity(), getString(R.string.main_activity_toast_patch_not_selected), Toast.LENGTH_LONG).show();
+            return false;
+        }
+
+        Intent intent = new Intent(getActivity(), WorkerService.class);
+        intent.putExtra("action", Globals.ACTION_PATCHING);
+        intent.putExtra("romPath", romPath);
+        intent.putExtra("patchPath", patchPath);
+        intent.putExtra("outputPath", outputPath);
+        getActivity().startService(intent);
+
+        Toast.makeText(getActivity(), R.string.toast_patching_started_check_notify,Toast.LENGTH_SHORT).show();
+        return true;
+    }
+
+    private void renameOutputRom(){
+        if (romPath == null) {
+            Toast.makeText(getActivity(), getString(R.string.main_activity_toast_rom_not_selected), Toast.LENGTH_LONG).show();
+            return;
+        }
+
+        AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity());
+        dialog.setTitle(R.string.dialog_rename_title);
+        final EditText input = new EditText(getActivity());
+        input.setText(outputNameTextView.getText());
+
+        // add left and right margins to EditText.
+        FrameLayout container = new FrameLayout(getActivity());
+        FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+        int dp_24 = Utils.dpToPx(getActivity(), 24);
+        params.setMargins(dp_24, 0, dp_24, 0);
+        input.setLayoutParams(params);
+        container.addView(input);
+        dialog.setView(container);
+
+        dialog.setPositiveButton(R.string.dialog_rename_ok, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                String newName = input.getText().toString();
+                if (newName.equals(romNameTextView.getText())) {
+                    Toast.makeText(getActivity(), R.string.dialog_rename_error_same_name, Toast.LENGTH_LONG).show();
+                    return;
+                }
+                if (newName.contains("/")) {
+                    newName = newName.replaceAll("/", "_");
+                    Toast.makeText(getActivity(), R.string.dialog_rename_error_invalid_chars, Toast.LENGTH_LONG).show();
+                }
+                outputNameTextView.setText(newName);
+                outputPath = new File(romPath).getParent().concat(File.separator).concat(newName);
+            }
+        });
+        dialog.setNegativeButton(R.string.dialog_rename_cancel, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                dialog.cancel();
+            }
+        });
+
+        dialog.show();
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/fragment/SettingsFragment.java

@@ -0,0 +1,33 @@
+/*
+Copyright (C) 2016 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.fragment;
+
+import android.os.Bundle;
+import android.support.v7.preference.PreferenceFragmentCompat;
+
+import org.emunix.unipatcher.R;
+
+public class SettingsFragment extends PreferenceFragmentCompat {
+
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        setPreferencesFromResource(R.xml.preferences, rootKey);
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/fragment/SmdFixChecksumFragment.java

@@ -0,0 +1,152 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.fragment;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.graphics.Typeface;
+import android.os.Bundle;
+import android.support.v7.widget.CardView;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import org.emunix.unipatcher.Globals;
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.Settings;
+import org.emunix.unipatcher.Utils;
+import org.emunix.unipatcher.WorkerService;
+import org.emunix.unipatcher.ui.activity.FilePickerActivity;
+
+import java.io.File;
+
+public class SmdFixChecksumFragment extends ActionFragment implements View.OnClickListener {
+    private static final String LOG_TAG = "org.emunix.unipatcher";
+
+    private static final int SELECT_ROM_FILE = 1;
+
+    private TextView romNameTextView;
+    private TextView fixChecksumInfoTextview;
+    private String romPath = null;
+
+    public SmdFixChecksumFragment() {}
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.smd_fix_checksum_fragment, container, false);
+
+        romNameTextView = (TextView) view.findViewById(R.id.romNameTextView);
+        fixChecksumInfoTextview = (TextView) view.findViewById(R.id.fixChecksumInfoTextView);
+
+        CardView romCardView = (CardView) view.findViewById(R.id.romCardView);
+        romCardView.setOnClickListener(this);
+
+        restoreState(savedInstanceState);
+
+        setFonts(view);
+
+        // Set action bar title
+        getActivity().setTitle(R.string.nav_smd_fix_checksum);
+
+        return view;
+    }
+
+    private void setFonts(View view) {
+        TextView romLabel = (TextView) view.findViewById(R.id.romLabel);
+
+        Typeface roboto_light = Typeface.createFromAsset(getActivity().getAssets(), "fonts/Roboto-Light.ttf");
+
+        romLabel.setTypeface(roboto_light);
+        romNameTextView.setTypeface(roboto_light);
+        fixChecksumInfoTextview.setTypeface((roboto_light));
+    }
+
+    private void restoreState(Bundle savedInstanceState) {
+        if (savedInstanceState != null){
+            romPath = savedInstanceState.getString("romPath");
+            if (romPath != null)
+                romNameTextView.setText(new File(romPath).getName());
+        }
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle savedInstanceState) {
+        super.onSaveInstanceState(savedInstanceState);
+        savedInstanceState.putString("romPath", romPath);
+    }
+
+    @Override
+    public void onClick(View view){
+        Intent intent = new Intent(getActivity(), FilePickerActivity.class);
+        switch (view.getId()) {
+            case R.id.romCardView:
+                intent.putExtra("title", getString(R.string.file_picker_activity_title_select_rom));
+                intent.putExtra("directory", Settings.getRomDir(getActivity()));
+                startActivityForResult(intent, SELECT_ROM_FILE);
+                break;
+        }
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data){
+        Log.d(LOG_TAG, "onActivityResult(" + requestCode + "," + resultCode + "," + data);
+        if (resultCode == Activity.RESULT_OK) {
+            String path = data.getStringExtra("path");
+
+            if (Utils.isArchive(path)) {
+                Toast.makeText(getActivity(), R.string.main_activity_toast_archives_not_supported, Toast.LENGTH_LONG).show();
+            }
+
+            switch (requestCode) {
+                case SELECT_ROM_FILE:
+                    romPath = path;
+                    romNameTextView.setVisibility(View.VISIBLE);
+                    romNameTextView.setText(new File(path).getName());
+                    Settings.setLastRomDir(getActivity(), new File(path).getParent());
+                    break;
+            }
+        }
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+
+    public boolean runAction(){
+        if (romPath == null){
+            Toast.makeText(getActivity(), getString(R.string.main_activity_toast_rom_not_selected), Toast.LENGTH_LONG).show();
+            return false;
+        }
+
+        Intent intent = new Intent(getActivity(), WorkerService.class);
+        intent.putExtra("action", Globals.ACTION_SMD_FIX_CHECKSUM);
+        intent.putExtra("romPath", romPath);
+        getActivity().startService(intent);
+
+        Toast.makeText(getActivity(), R.string.notify_smd_fix_checksum_started_check_notify,Toast.LENGTH_SHORT).show();
+        return true;
+    }
+}
+

app/src/main/java/org/emunix/unipatcher/ui/fragment/SnesSmcHeaderFragment.java

@@ -0,0 +1,201 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.fragment;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.graphics.Typeface;
+import android.os.Bundle;
+import android.support.v7.widget.CardView;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import org.emunix.unipatcher.Globals;
+import org.emunix.unipatcher.R;
+import org.emunix.unipatcher.Settings;
+import org.emunix.unipatcher.Utils;
+import org.emunix.unipatcher.WorkerService;
+import org.emunix.unipatcher.tools.SnesSmcHeader;
+import org.emunix.unipatcher.ui.activity.FilePickerActivity;
+
+import java.io.File;
+
+public class SnesSmcHeaderFragment extends ActionFragment implements View.OnClickListener {
+    private static final String LOG_TAG = "org.emunix.unipatcher";
+    private static final int SELECT_ROM_FILE = 1;
+    private static final int SELECT_HEADER_FILE = 2;
+
+    private TextView romNameTextView;
+    private TextView headerNameTextView;
+    private TextView headerInfoTextView;
+    private CardView headerCardView;
+    private String romPath = null;
+    private String headerPath = null;
+
+    private int action = 0;
+
+    public SnesSmcHeaderFragment() {}
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.snes_smc_header_fragment, container, false);
+
+        romNameTextView = (TextView) view.findViewById(R.id.romNameTextView);
+        headerNameTextView = (TextView) view.findViewById(R.id.headerNameTextView);
+        headerInfoTextView = (TextView) view.findViewById(R.id.headerInfoTextView);
+        
+        CardView romCardView = (CardView) view.findViewById(R.id.romCardView);
+        romCardView.setOnClickListener(this);
+        headerCardView = (CardView) view.findViewById(R.id.headerCardView);
+        headerCardView.setOnClickListener(this);
+
+        restoreState(savedInstanceState);
+
+        setFonts(view);
+
+        // Set action bar title
+        getActivity().setTitle(R.string.nav_snes_add_del_smc_header);
+
+        return view;
+    }
+
+    private void setFonts(View view) {
+        TextView romLabel = (TextView) view.findViewById(R.id.romLabel);
+        TextView headerLabel = (TextView) view.findViewById(R.id.headerLabel);
+
+        Typeface roboto_light = Typeface.createFromAsset(getActivity().getAssets(), "fonts/Roboto-Light.ttf");
+
+        romLabel.setTypeface(roboto_light);
+        romNameTextView.setTypeface(roboto_light);
+        headerLabel.setTypeface(roboto_light);
+        headerNameTextView.setTypeface(roboto_light);
+        headerInfoTextView.setTypeface(roboto_light);
+    }
+
+    private void restoreState(Bundle savedInstanceState) {
+        if (savedInstanceState != null){
+            romPath = savedInstanceState.getString("romPath");
+            headerPath = savedInstanceState.getString("headerPath");
+            action = savedInstanceState.getInt("action");
+            if (action == Globals.ACTION_SNES_ADD_SMC_HEADER) {
+                headerInfoTextView.setText(R.string.snes_smc_header_will_be_added);
+                headerCardView.setVisibility(View.VISIBLE);
+            } else if (action == Globals.ACTION_SNES_DELETE_SMC_HEADER) {
+                headerInfoTextView.setText(R.string.snes_smc_header_will_be_removed);
+                headerCardView.setVisibility(View.GONE);
+            }
+            if (romPath != null)
+                romNameTextView.setText(new File(romPath).getName());
+            if (headerPath != null)
+                headerNameTextView.setText(new File(headerPath).getName());
+        }
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle savedInstanceState) {
+        super.onSaveInstanceState(savedInstanceState);
+        savedInstanceState.putString("romPath", romPath);
+        savedInstanceState.putString("headerPath", headerPath);
+        savedInstanceState.putInt("action", action);
+    }
+
+    @Override
+    public void onClick(View view){
+        Intent intent = new Intent(getActivity(), FilePickerActivity.class);
+        switch (view.getId()) {
+            case R.id.romCardView:
+                intent.putExtra("title", getString(R.string.file_picker_activity_title_select_rom));
+                intent.putExtra("directory", Settings.getRomDir(getActivity()));
+                startActivityForResult(intent, SELECT_ROM_FILE);
+                break;
+            case R.id.headerCardView:
+                intent.putExtra("title", getString(R.string.file_picker_activity_title_select_header));
+                startActivityForResult(intent, SELECT_HEADER_FILE);
+                break;
+        }
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data){
+        Log.d(LOG_TAG, "onActivityResult(" + requestCode + "," + resultCode + "," + data);
+        if (resultCode == Activity.RESULT_OK) {
+            String path = data.getStringExtra("path");
+
+            if (Utils.isArchive(path)) {
+                Toast.makeText(getActivity(), R.string.main_activity_toast_archives_not_supported, Toast.LENGTH_LONG).show();
+            }
+
+            switch (requestCode) {
+                case SELECT_ROM_FILE:
+                    romPath = path;
+                    romNameTextView.setVisibility(View.VISIBLE);
+                    romNameTextView.setText(new File(path).getName());
+                    Settings.setLastRomDir(getActivity(), new File(path).getParent());
+                    SnesSmcHeader checker = new SnesSmcHeader();
+                    if (checker.isHasSmcHeader(new File(path))) {
+                        action = Globals.ACTION_SNES_DELETE_SMC_HEADER;
+                        headerCardView.setVisibility(View.GONE);
+                        headerInfoTextView.setText(R.string.snes_smc_header_will_be_removed);
+                    } else {
+                        action = Globals.ACTION_SNES_ADD_SMC_HEADER;
+                        headerCardView.setVisibility(View.VISIBLE);
+                        headerInfoTextView.setText(R.string.snes_smc_header_will_be_added);
+                    }
+                    headerPath = null;
+                    headerNameTextView.setText(R.string.main_activity_tap_to_select);
+                    break;
+                case SELECT_HEADER_FILE:
+                    headerPath = path;
+                    headerNameTextView.setText(new File(path).getName());
+                    break;
+            }
+        }
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+
+    public boolean runAction(){
+        if (romPath == null){
+            Toast.makeText(getActivity(), getString(R.string.main_activity_toast_rom_not_selected), Toast.LENGTH_LONG).show();
+            return false;
+        }
+
+        Intent intent = new Intent(getActivity(), WorkerService.class);
+        intent.putExtra("action", action);
+        intent.putExtra("romPath", romPath);
+        intent.putExtra("headerPath", headerPath);
+        getActivity().startService(intent);
+
+        if (action == Globals.ACTION_SNES_ADD_SMC_HEADER) {
+            Toast.makeText(getActivity(), R.string.notify_snes_add_smc_header_stared_check_noify, Toast.LENGTH_SHORT).show();
+        } else {
+            Toast.makeText(getActivity(), R.string.notify_snes_delete_smc_header_stared_check_noify, Toast.LENGTH_SHORT).show();
+        }
+        return true;
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/notify/Notify.java

@@ -0,0 +1,81 @@
+/*
+Copyright (C) 2013 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+package org.emunix.unipatcher.ui.notify;
+
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.support.v4.app.NotificationCompat;
+import android.support.v4.app.NotificationManagerCompat;
+
+import org.emunix.unipatcher.ui.activity.MainActivity;
+
+public abstract class Notify {
+    protected static int count = 1;
+    protected final int ID = count;
+    protected Context context;
+
+    protected NotificationCompat.Builder notifyBuilder;
+    protected NotificationManagerCompat notifyMng;
+
+    public Notify(Context c) {
+        context = c;
+        count++;
+
+        Intent notificationIntent = new Intent(context, MainActivity.class);
+        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
+        notifyBuilder = new NotificationCompat.Builder(context);
+        notifyBuilder.setContentIntent(PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT));
+        //notifyMng = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
+        notifyMng = NotificationManagerCompat.from(context);
+    }
+
+    public void show() {
+        notifyMng.notify(ID, notifyBuilder.build());
+    }
+
+    public int getID() {
+        return ID;
+    }
+
+    public NotificationCompat.Builder getNotifyBuilder() {
+        return notifyBuilder;
+    }
+
+    public void showResult(String message) {
+        if (message == null) {
+            setCompleted();
+        } else {
+            setFailed(message);
+        }
+        show();
+    }
+
+    public abstract void setCompleted();
+    public abstract void setFailed(String message);
+
+    public void setProgress(boolean isEnabled) {
+        notifyBuilder.setProgress(0, 0, isEnabled);
+    }
+
+    public void setSticked(boolean isSticked) {
+        notifyBuilder.setAutoCancel(!isSticked);
+        notifyBuilder.setOngoing(isSticked);
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/notify/PatchingNotify.java

@@ -0,0 +1,56 @@
+/*
+Copyright (C) 2013 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.notify;
+
+import android.content.Context;
+import android.support.v4.app.NotificationCompat;
+
+import org.emunix.unipatcher.R;
+
+public class PatchingNotify extends Notify {
+
+    public PatchingNotify(Context c, String text) {
+        super(c);
+        notifyBuilder.setSmallIcon(R.drawable.ic_stat_patching);
+        notifyBuilder.setContentTitle(context.getString(R.string.notify_applying_patch));
+        notifyBuilder.setContentText(text);
+        notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(text));
+        setSticked(true);
+        setProgress(true);
+    }
+
+    @Override
+    public void setCompleted() {
+        setProgress(false);
+        setSticked(false);
+        notifyBuilder.setTicker(context.getText(R.string.notify_patching_complete));
+        notifyBuilder.setContentTitle(context.getText(R.string.notify_patching_complete));
+    }
+
+    @Override
+    public void setFailed(String message) {
+        setProgress(false);
+        setSticked(false);
+        notifyBuilder.setTicker(context.getText(R.string.notify_error));
+        notifyBuilder.setContentTitle(context.getString(R.string.notify_error));
+        notifyBuilder.setContentText(message);
+        notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(message));
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/notify/SmdFixChecksumNotify.java

@@ -0,0 +1,56 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.notify;
+
+import android.content.Context;
+import android.support.v4.app.NotificationCompat;
+
+import org.emunix.unipatcher.R;
+
+public class SmdFixChecksumNotify extends Notify {
+
+    public SmdFixChecksumNotify(Context c, String text) {
+        super(c);
+        notifyBuilder.setSmallIcon(R.drawable.ic_stat_patching);
+        notifyBuilder.setContentTitle(context.getString(R.string.notify_smd_fix_checksum_in_progress));
+        notifyBuilder.setContentText(text);
+        notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(text));
+        setSticked(true);
+        setProgress(true);
+    }
+
+    @Override
+    public void setCompleted() {
+        setProgress(false);
+        setSticked(false);
+        notifyBuilder.setTicker(context.getText(R.string.notify_smd_fix_checksum_complete));
+        notifyBuilder.setContentTitle(context.getText(R.string.notify_smd_fix_checksum_complete));
+    }
+
+    @Override
+    public void setFailed(String message) {
+        setProgress(false);
+        setSticked(false);
+        notifyBuilder.setTicker(context.getText(R.string.notify_error));
+        notifyBuilder.setContentTitle(context.getString(R.string.notify_error));
+        notifyBuilder.setContentText(message);
+        notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(message));
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/notify/SnesAddSmcHeaderNotify.java

@@ -0,0 +1,55 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.notify;
+
+import android.content.Context;
+import android.support.v4.app.NotificationCompat;
+
+import org.emunix.unipatcher.R;
+
+public class SnesAddSmcHeaderNotify extends Notify {
+    public SnesAddSmcHeaderNotify(Context c, String text) {
+        super(c);
+        notifyBuilder.setSmallIcon(R.drawable.ic_stat_patching);
+        notifyBuilder.setContentTitle(context.getString(R.string.notify_snes_add_smc_header_in_progress));
+        notifyBuilder.setContentText(text);
+        notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(text));
+        setSticked(true);
+        setProgress(true);
+    }
+
+    @Override
+    public void setCompleted() {
+        setProgress(false);
+        setSticked(false);
+        notifyBuilder.setTicker(context.getText(R.string.notify_snes_add_smc_header_complete));
+        notifyBuilder.setContentTitle(context.getText(R.string.notify_snes_add_smc_header_complete));
+    }
+
+    @Override
+    public void setFailed(String message) {
+        setProgress(false);
+        setSticked(false);
+        notifyBuilder.setTicker(context.getText(R.string.notify_error));
+        notifyBuilder.setContentTitle(context.getString(R.string.notify_error));
+        notifyBuilder.setContentText(message);
+        notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(message));
+    }
+}

app/src/main/java/org/emunix/unipatcher/ui/notify/SnesDeleteSmcHeaderNotify.java

@@ -0,0 +1,55 @@
+/*
+Copyright (C) 2014 Boris Timofeev
+
+This file is part of UniPatcher.
+
+UniPatcher is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+UniPatcher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.emunix.unipatcher.ui.notify;
+
+import android.content.Context;
+import android.support.v4.app.NotificationCompat;
+
+import org.emunix.unipatcher.R;
+
+public class SnesDeleteSmcHeaderNotify extends Notify {
+    public SnesDeleteSmcHeaderNotify(Context c, String text) {
+        super(c);
+        notifyBuilder.setSmallIcon(R.drawable.ic_stat_patching);
+        notifyBuilder.setContentTitle(context.getString(R.string.notify_snes_delete_smc_header_in_progress));
+        notifyBuilder.setContentText(text);
+        notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(text));
+        setSticked(true);
+        setProgress(true);
+    }
+
+    @Override
+    public void setCompleted() {
+        setProgress(false);
+        setSticked(false);
+        notifyBuilder.setTicker(context.getText(R.string.notify_snes_delete_smc_header_complete));
+        notifyBuilder.setContentTitle(context.getText(R.string.notify_snes_delete_smc_header_complete));
+    }
+
+    @Override
+    public void setFailed(String message) {
+        setProgress(false);
+        setSticked(false);
+        notifyBuilder.setTicker(context.getText(R.string.notify_error));
+        notifyBuilder.setContentTitle(context.getString(R.string.notify_error));
+        notifyBuilder.setContentText(message);
+        notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(message));
+    }
+}

app/src/main/res/anim/slide_from_bottom.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:interpolator="@android:anim/decelerate_interpolator">
+
+    <translate
+        android:fromYDelta="100%"
+        android:toYDelta="0"
+        android:duration="500" />
+
+</set>