version bump to 0.15

Thanks to Nabarl Wang, Davi Lopes, Matheus Silva Sales, Jhonatan Cardoso

.tx/config

@@ -1,5 +1,6 @@
 [main]
 host = https://www.transifex.com
+lang_map = he: iw, zh_CN: zh-rCN, zh_TW: zh-rTW, es_MX: es-rMX, pt_BR: pt-rBR, nb_NO: nb-rNO
 
 [unipatcher.strings_xml]
 file_filter = app/src/main/res/values-<lang>/strings.xml

README.md

@@ -8,28 +8,30 @@ UniPatcher is a ROM patcher for Android that supports IPS, IPS32, UPS, BPS, APS
 
 ### Additional features:
 
+* Creating XDelta3 patches
 * Fix checksum in Sega Mega Drive ROMs
 * Add/Delete SMC header in Super Nintendo ROMs
 
 ### Screenshots:
 
-<img src="/google-play/screenshot_1.png" width="350">
-<img src="/google-play/screenshot_2.png" width="350">
+<img src="/google-play/screenshot_1.png" width="350"> <img src="/google-play/screenshot_2.png" width="350">
 
 ### Install UniPatcher:
 
-[<img src="/google-play/badges/google-play.png" width="220">](https://play.google.com/store/apps/details?id=org.emunix.unipatcher)  [<img src="/google-play/badges/amazon.png" width="220">](http://www.amazon.com/gp/mas/dl/android?p=org.emunix.unipatcher)  [<img src="/google-play/badges/slideme.png" width="220">](http://slideme.org/application/unipatcher)
+[<img src="/google-play/badges/google-play.png" alt="Get it on Google Play" width="220">](https://play.google.com/store/apps/details?id=org.emunix.unipatcher) [<img src="/google-play/badges/f-droid.png" alt="Get it on F-Droid" width="220">](https://f-droid.org/app/org.emunix.unipatcher)
+
+[<img src="/google-play/badges/amazon.png" alt="Get it on Amazon" width="220">](http://www.amazon.com/gp/mas/dl/android?p=org.emunix.unipatcher)  [<img src="/google-play/badges/slideme.png" alt="Get it on SlideMe" width="220">](http://slideme.org/application/unipatcher)
 
 [... or get a Release APK here on GitHub](https://github.com/btimofeev/UniPatcher/releases)
 
-### How to contribute to UniPatcher:
+### Contribute:
 
-#### Report a bug or suggest a new feature
+#### Report a bug or suggest features
 
-Bugs and new features are being discussed on the GitHub [Issue Tracker](https://github.com/btimofeev/UniPatcher/issues).
+These are discussed on the GitHub [Issue Tracker](https://github.com/btimofeev/UniPatcher/issues).
 
-#### Help with translations
-If you want to translate UniPatcher into another language, you can visit the [Transifex project page](https://www.transifex.com/unipatcher/unipatcher/). 
+#### Translations
+Help translate UniPatcher into another language on the [Transifex project page](https://www.transifex.com/unipatcher/unipatcher/). 
 
 ### License
 UniPatcher is licensed under the GPL version 3. You can find the license text in the COPYING file.

app/build.gradle

@@ -1,13 +1,8 @@
-def versionMajor = 0
-def versionMinor = 13
-def versionPatch = 2
-def versionBuild = 0
-
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion '25.0.2'
+    compileSdkVersion 27
+    buildToolsVersion '27.0.1'
 
     signingConfigs {
         release
@@ -16,13 +11,17 @@ android {
     defaultConfig {
         applicationId "org.emunix.unipatcher"
         minSdkVersion 14
-        targetSdkVersion 25
-        versionCode versionMajor * 1000000 + versionMinor * 10000 + versionPatch * 100 + versionBuild
-        versionName "${versionMajor}.${versionMinor}.${versionPatch}"
+        targetSdkVersion 27
+        versionCode 150000
+        versionName "0.15"
+        vectorDrawables.useSupportLibrary = true
+        ndk {
+            abiFilters 'armeabi-v7a', 'x86'
+        }
         externalNativeBuild {
             cmake {
                 cppFlags ""
-                arguments "-DANDROID_PLATFORM=android-14"
+                arguments "-DANDROID_PLATFORM=android-14", "-DCMAKE_BUILD_TYPE=Release"
             }
         }
     }
@@ -36,6 +35,8 @@ android {
         }
     }
 
+    flavorDimensions "default"
+
     productFlavors {
         free {
             buildConfigField "String", "RATE_URL", "\"https://github.com/btimofeev/UniPatcher\""
@@ -75,6 +76,11 @@ android {
             path "CMakeLists.txt"
         }
     }
+
+    lintOptions {
+        disable 'MissingTranslation'
+    }
+
 }
 
 def Properties props = new Properties()
@@ -103,21 +109,18 @@ if (propFile.canRead()) {
 
 dependencies {
     testCompile 'junit:junit:4.12'
-    testCompile 'org.mockito:mockito-core:2.2.28'
+    testCompile 'org.mockito:mockito-core:2.12.0'
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:support-v4:25.1.1'
-    compile 'com.android.support:appcompat-v7:25.1.1'
-    compile 'com.android.support:cardview-v7:25.1.1'
-    compile 'com.android.support:preference-v14:25.1.1'
-    compile 'com.android.support:recyclerview-v7:25.1.1'
-    compile 'com.android.support:design:25.1.1'
-    compile 'com.google.firebase:firebase-core:10.0.1'
-    compile 'com.google.firebase:firebase-crash:10.0.1'
+    compile 'com.android.support:support-v4:27.0.2'
+    compile 'com.android.support:appcompat-v7:27.0.2'
+    compile 'com.android.support:cardview-v7:27.0.2'
+    compile 'com.android.support:preference-v14:27.0.2'
+    compile 'com.android.support:recyclerview-v7:27.0.2'
+    compile 'com.android.support:design:27.0.2'
+    compile 'com.android.support:support-v13:27.0.2' // used in material-dialogs
     compile 'commons-io:commons-io:2.5'
     compile 'org.sufficientlysecure:donations:2.5'
-    compile 'org.sufficientlysecure:html-textview:3.0'
+    compile 'org.sufficientlysecure:html-textview:3.5'
     compile 'org.commonjava.googlecode.markdown4j:markdown4j:2.2-cj-1.1'
-    compile 'com.afollestad.material-dialogs:core:0.9.2.3'
+    compile 'com.afollestad.material-dialogs:core:0.9.6.0'
 }
-
-apply plugin: 'com.google.gms.google-services'

app/google-services.json

@@ -1,53 +0,0 @@
-{
-  "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/src/main/AndroidManifest.xml

@@ -6,12 +6,11 @@
     <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="android.permission.INTERNET"/>
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 
     <application
+        android:name=".UniPatcher"
         android:allowBackup="false"
-        android:extractNativeLibs="false"
+        android:extractNativeLibs="true"
         android:fullBackupContent="false"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
@@ -43,6 +42,7 @@
                 <data android:pathPattern="/.*\\.dps"/>
                 <data android:pathPattern="/.*\\.xdelta"/>
                 <data android:pathPattern="/.*\\.xdelta3"/>
+                <data android:pathPattern="/.*\\.xd"/>
                 <data android:pathPattern="/.*\\.vcdiff"/>
                 <data android:host="*"/>
             </intent-filter>
@@ -69,10 +69,6 @@
             android:name=".WorkerService"
             android:exported="false"/>
 
-        <meta-data
-            android:name="com.google.android.gms.version"
-            android:value="@integer/google_play_services_version"/>
-
     </application>
 
-</manifest>
+</manifest>

app/src/main/cpp/xdelta3.c

@@ -2,7 +2,7 @@
 This file based on encode_decode_test.c from XDelta3 sources.
 
 Copyright (C) 2007 Ralf Junker
-Copyright (C) 2016 Boris Timofeev
+Copyright (C) 2016-2017 Boris Timofeev
 
 This file is part of UniPatcher.
 
@@ -30,18 +30,21 @@ along with UniPatcher.  If not, see <http://www.gnu.org/licenses/>.
 #include "xdelta3/xdelta3/xdelta3.h"
 #include "xdelta3/xdelta3/xdelta3.c"
 
-int apply(FILE *patch, FILE *in, FILE *out);
+int code(int encode, FILE *in, FILE *src, FILE *out, int ignoreChecksum);
 
 const int ERR_UNABLE_OPEN_PATCH = -5001;
 const int ERR_UNABLE_OPEN_ROM = -5002;
 const int ERR_UNABLE_OPEN_OUTPUT = -5003;
+const int ERR_UNABLE_OPEN_SOURCE = -5004;
+const int ERR_UNABLE_OPEN_MODIFIED = -5005;
 const int ERR_WRONG_CHECKSUM = -5010;
 
 int Java_org_emunix_unipatcher_patcher_XDelta_xdelta3apply(JNIEnv *env,
                                                          jobject this,
                                                          jstring patchPath,
                                                          jstring romPath,
-                                                         jstring outputPath) {
+                                                         jstring outputPath,
+                                                         jboolean ignoreChecksum) {
     int ret = 0;
     const char *patchName = (*env)->GetStringUTFChars(env, patchPath, NULL);
     const char *romName = (*env)->GetStringUTFChars(env, romPath, NULL);
@@ -70,7 +73,7 @@ int Java_org_emunix_unipatcher_patcher_XDelta_xdelta3apply(JNIEnv *env,
         return ERR_UNABLE_OPEN_OUTPUT;
     }
 
-    ret = apply(patchFile, romFile, outputFile);
+    ret = code(0, patchFile, romFile, outputFile, (int)ignoreChecksum);
 
     fclose(patchFile);
     fclose(romFile);
@@ -78,8 +81,50 @@ int Java_org_emunix_unipatcher_patcher_XDelta_xdelta3apply(JNIEnv *env,
     return ret;
 }
 
-int apply(FILE *patch, FILE *in, FILE *out) {
-    int BUFFER_SIZE = 32768;
+int Java_org_emunix_unipatcher_patcher_XDelta_xdelta3create(JNIEnv *env,
+                                                           jobject this,
+                                                           jstring patchPath,
+                                                           jstring sourcePath,
+                                                           jstring modifiedPath) {
+    int ret = 0;
+    const char *patchName = (*env)->GetStringUTFChars(env, patchPath, NULL);
+    const char *sourceName = (*env)->GetStringUTFChars(env, sourcePath, NULL);
+    const char *modifiedName = (*env)->GetStringUTFChars(env, modifiedPath, NULL);
+
+    FILE *patchFile = fopen(patchName, "wb");
+    FILE *sourceFile = fopen(sourceName, "rb");
+    FILE *modifiedFile = fopen(modifiedName, "rb");
+
+    (*env)->ReleaseStringUTFChars(env, patchPath, patchName);
+    (*env)->ReleaseStringUTFChars(env, sourcePath, sourceName);
+    (*env)->ReleaseStringUTFChars(env, modifiedPath, modifiedName);
+
+    if (!patchFile) {
+        return ERR_UNABLE_OPEN_PATCH;
+    }
+
+    if (!sourceFile) {
+        fclose(patchFile);
+        return ERR_UNABLE_OPEN_SOURCE;
+    }
+
+    if (!modifiedFile) {
+        fclose(patchFile);
+        fclose(sourceFile);
+        return ERR_UNABLE_OPEN_MODIFIED;
+    }
+
+    ret = code(1, modifiedFile, sourceFile, patchFile, 0);
+
+    fclose(patchFile);
+    fclose(sourceFile);
+    fclose(modifiedFile);
+    return ret;
+}
+
+
+int code(int encode, FILE *in, FILE *src, FILE *out, int ignoreChecksum) {
+    int BUFFER_SIZE = 0x1000;
 
     int r, ret;
     xd3_stream stream;
@@ -93,32 +138,37 @@ int apply(FILE *patch, FILE *in, FILE *out) {
 
     xd3_init_config(&config, 0);
     config.winsize = BUFFER_SIZE;
+    if (ignoreChecksum) {
+        config.flags |= XD3_ADLER32_NOVER;
+    }
     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);
+    r = fseek(src, 0, SEEK_SET);
     if (r)
         return r;
-    source.onblk = fread((void *) source.curblk, 1, source.blksize, in);
+    source.onblk = fread((void *) source.curblk, 1, source.blksize, src);
     source.curblkno = 0;
     xd3_set_source(&stream, &source);
 
     Input_Buf = malloc(BUFFER_SIZE);
 
-    fseek(patch, 0, SEEK_SET);
+    fseek(in, 0, SEEK_SET);
     do {
-        Input_Buf_Read = fread(Input_Buf, 1, BUFFER_SIZE, patch);
+        Input_Buf_Read = fread(Input_Buf, 1, BUFFER_SIZE, in);
         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);
+process:
+        if (encode)
+            ret = xd3_encode_input(&stream);
+        else
+            ret = xd3_decode_input(&stream);
 
         switch (ret) {
             case XD3_INPUT:
@@ -132,10 +182,10 @@ int apply(FILE *patch, FILE *in, FILE *out) {
                 goto process;
 
             case XD3_GETSRCBLK:
-                r = fseek(in, source.blksize * source.getblkno, SEEK_SET);
+                r = fseek(src, source.blksize * source.getblkno, SEEK_SET);
                 if (r)
                     return r;
-                source.onblk = fread((void *) source.curblk, 1, source.blksize, in);
+                source.onblk = fread((void *) source.curblk, 1, source.blksize, src);
                 source.curblkno = source.getblkno;
                 goto process;
 

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

@@ -0,0 +1,35 @@
+/*
+ Copyright (c) 2017 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 Action {
+    public static final int SELECT_ROM_FILE = 1;
+    public static final int SELECT_PATCH_FILE = 2;
+    public static final int SELECT_SOURCE_FILE = 3;
+    public static final int SELECT_MODIFIED_FILE = 4;
+    public static final int SELECT_HEADER_FILE = 5;
+
+    public static final int APPLY_PATCH = 101;
+    public static final int CREATE_PATCH = 102;
+    public static final int SMD_FIX_CHECKSUM = 103;
+    public static final int SNES_ADD_SMC_HEADER = 104;
+    public static final int SNES_DELETE_SMC_HEADER = 105;
+}

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

@@ -1,37 +0,0 @@
-/*
-Copyright (C) 2013-2017 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 String cmdArgument = null;
-
-    public static String getCmdArgument() {
-        return cmdArgument;
-    }
-
-    public static void setCmdArgument(String cmdArgument) {
-        Globals.cmdArgument = cmdArgument;
-    }
-
-    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

@@ -69,4 +69,33 @@ public class Settings {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         return prefs.getString("output_directory", "");
     }
+
+    public static boolean getIgnoreChecksum(Context context) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        return prefs.getBoolean("ignore_checksum", false);
+    }
+
+    public static void setPatchingSuccessful(Context context, Boolean isSuccessful) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.putBoolean("patching_successful", isSuccessful);
+        editor.apply();
+    }
+
+    public static boolean getPatchingSuccessful(Context context) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        return prefs.getBoolean("patching_successful", false);
+    }
+
+    public static void setDontShowDonateSnackbarCount(Context context, int count) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.putInt("dont_show_donate_snackbar", count);
+        editor.apply();
+    }
+
+    public static int getDontShowDonateSnackbarCount(Context context) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        return prefs.getInt("dont_show_donate_snackbar", 0);
+    }
 }

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

@@ -0,0 +1,57 @@
+/*
+ Copyright (c) 2017 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.Application;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
+import android.os.Build;
+
+public class UniPatcher extends Application {
+    private static String appArgument = null;
+    public static final String NOTIFICATION_CHANNEL_ID = "notifications";
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        initNotificationChannel();
+    }
+
+    public static String getAppArgument() {
+        return appArgument;
+    }
+
+    public static void setAppArgument(String appArgument) {
+        UniPatcher.appArgument = appArgument;
+    }
+
+    public void initNotificationChannel() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
+            return;
+        }
+        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+        NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID,
+                getString(R.string.notification_channel_name),
+                NotificationManager.IMPORTANCE_DEFAULT);
+        manager.createNotificationChannel(channel);
+    }
+}

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

@@ -22,6 +22,7 @@ package org.emunix.unipatcher;
 import android.Manifest;
 import android.annotation.TargetApi;
 import android.content.Context;
+import android.content.Intent;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.os.Build;
@@ -48,6 +49,14 @@ public class Utils {
 
     private static final int BUFFER_SIZE = 10240; // 10 Kb
 
+    public static void startForegroundService(Context context, Intent intent) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
+            context.startService(intent);
+        } else {
+            context.startForegroundService(intent);
+        }
+    }
+
     public static String getAppVersion(Context context) {
         String versionName = "N/A";
         try {
@@ -152,7 +161,7 @@ public class Utils {
 
     public static boolean isPatch(File file) {
         String[] patches =
-                {"ips", "ups", "bps", "aps", "ppf", "dps", "ebp", "xdelta", "xdelta3", "vcdiff"};
+                {"ips", "ups", "bps", "aps", "ppf", "dps", "ebp", "xdelta", "xdelta3", "xd", "vcdiff"};
         String ext = FilenameUtils.getExtension(file.getName()).toLowerCase(Locale.getDefault());
         for (String patch : patches) {
             if (ext.equals(patch)) return true;

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

@@ -24,6 +24,7 @@ import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Intent;
+import android.os.Build;
 import android.os.PowerManager;
 import android.support.v4.app.NotificationCompat;
 
@@ -43,6 +44,7 @@ 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.CreatePatchNotify;
 import org.emunix.unipatcher.ui.notify.Notify;
 import org.emunix.unipatcher.ui.notify.PatchingNotify;
 import org.emunix.unipatcher.ui.notify.SmdFixChecksumNotify;
@@ -74,16 +76,19 @@ public class WorkerService extends IntentService {
         try {
             int action = intent.getIntExtra("action", 0);
             switch (action) {
-                case Globals.ACTION_PATCHING:
+                case Action.APPLY_PATCH:
                     actionPatching(intent);
                     break;
-                case Globals.ACTION_SMD_FIX_CHECKSUM:
+                case Action.CREATE_PATCH:
+                    actionCreatePatch(intent);
+                    break;
+                case Action.SMD_FIX_CHECKSUM:
                     actionSmdFixChecksum(intent);
                     break;
-                case Globals.ACTION_SNES_ADD_SMC_HEADER:
+                case Action.SNES_ADD_SMC_HEADER:
                     actionSnesAddSmcHeader(intent);
                     break;
-                case Globals.ACTION_SNES_DELETE_SMC_HEADER:
+                case Action.SNES_DELETE_SMC_HEADER:
                     actionSnesDeleteSmcHeader(intent);
                     break;
             }
@@ -141,31 +146,88 @@ public class WorkerService extends IntentService {
             patcher = new EBP(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))
+        else if ("xdelta".equals(ext) || "xdelta3".equals(ext) || "xd".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);
+            showErrorNotification(errorMsg);
             return;
         }
 
+        Notify notify = new PatchingNotify(this, outputFile.getName());
         startForeground(notify.getID(), notify.getNotifyBuilder().build());
 
         try {
             if ("ppf".equals(ext))
                 Utils.copyFile(this, romFile, outputFile);
-            patcher.apply();
+            patcher.apply(Settings.getIgnoreChecksum(this));
+            Settings.setPatchingSuccessful(this, true);
         } 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);
+            if (outputFile.isFile()) {
+                FileUtils.deleteQuietly(outputFile);
+            }
+        } finally {
+            stopForeground(true);
+        }
+        notify.showResult(errorMsg);
+    }
+
+    private void actionCreatePatch(Intent intent) {
+        String errorMsg = null;
+        File sourceFile = new File(intent.getStringExtra("sourcePath"));
+        File modifiedFile = new File(intent.getStringExtra("modifiedPath"));
+        File patchFile = new File(intent.getStringExtra("patchPath"));
+
+        if (!fileExists(sourceFile) || !fileExists(modifiedFile))
+            return;
+
+        // create output dir
+        try {
+            if (!patchFile.getParentFile().exists()) {
+                FileUtils.forceMkdirParent(patchFile);
+            }
+        } catch (IOException | SecurityException e) {
+            String text = getString(R.string.notify_error_unable_to_create_directory, patchFile.getParent());
+            showErrorNotification(text);
+            return;
+        }
+
+        // check access to output dir
+        try {
+            if (!patchFile.getParentFile().canWrite()) {
+                String text = getString(R.string.notify_error_unable_to_write_to_directory, patchFile.getParent());
+                showErrorNotification(text);
+                return;
+            }
+        } catch (SecurityException e) {
+            String text = getString(R.string.notify_error_unable_to_write_to_directory, patchFile.getParent());
+            showErrorNotification(text);
+            return;
+        }
+
+        XDelta patcher = new XDelta(this, patchFile, sourceFile, modifiedFile);
+
+        Notify notify = new CreatePatchNotify(this, patchFile.getName());
+
+        startForeground(notify.getID(), notify.getNotifyBuilder().build());
+
+        try {
+            patcher.create();
+            Settings.setPatchingSuccessful(this, true);
+        } catch (PatchException | IOException e) {
+            if (Utils.getFreeSpace(patchFile.getParentFile()) == 0) {
+                errorMsg = getString(R.string.notify_error_not_enough_space);
+            } else {
+                errorMsg = e.getMessage();
+            }
+            FileUtils.deleteQuietly(patchFile);
         } finally {
             stopForeground(true);
         }
@@ -264,15 +326,21 @@ public class WorkerService extends IntentService {
     private void showErrorNotification(String text) {
         Intent notificationIntent = new Intent(this, MainActivity.class);
         NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
-        Notification notify = new NotificationCompat.Builder(this)
+        Notification notify = new NotificationCompat.Builder(this, UniPatcher.NOTIFICATION_CHANNEL_ID)
                 .setContentTitle(getString(R.string.notify_error))
                 .setContentText(text)
-                .setSmallIcon(R.drawable.ic_stat_patching)
+                .setSmallIcon(R.drawable.ic_gamepad_variant_white_24dp)
                 .setContentIntent(PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT))
                 .setAutoCancel(true)
                 .setStyle(new NotificationCompat.BigTextStyle()
                         .bigText(text))
                 .build();
-        nm.notify(0, notify);
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
+            nm.notify(32768, notify);
+        } else {
+            startForeground(32768, notify);
+            stopForeground(STOP_FOREGROUND_DETACH);
+        }
     }
 }

app/src/main/java/org/emunix/unipatcher/patcher/APS.java

@@ -43,7 +43,7 @@ public class APS extends Patcher {
     }
 
     @Override
-    public void apply() throws PatchException, IOException {
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
         Patcher aps = null;
         switch (checkAPS(patchFile)) {
             case APS_N64_PATCH:
@@ -56,7 +56,7 @@ public class APS extends Patcher {
                 throw new PatchException(context.getString(R.string.notify_error_not_aps_patch));
         }
 
-        aps.apply();
+        aps.apply(ignoreChecksum);
     }
 
     public int checkAPS(File file) throws PatchException, IOException {

app/src/main/java/org/emunix/unipatcher/patcher/APS_GBA.java

@@ -77,7 +77,7 @@ public class APS_GBA extends Patcher {
     }
 
     @Override
-    public void apply() throws PatchException, IOException {
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
         long fileSize1, fileSize2, bytesLeft, offset;
         int crc, patchCrc1, patchCrc2, pCount, oCount;
         boolean isOriginal = false;
@@ -138,7 +138,8 @@ public class APS_GBA extends Patcher {
                 } else if (crc == patchCrc2) {
                     isModified = true;
                 } else {
-                    throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+                    if (!ignoreChecksum)
+                        throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
                 }
                 if (isOriginal && isModified)
                     throw new PatchException(context.getString(R.string.notify_error_not_aps_patch));
@@ -153,7 +154,7 @@ public class APS_GBA extends Patcher {
 
         if (isOriginal) {
             Utils.truncateFile(outputFile, fileSize2);
-        } else {
+        } else if (isModified) {
             Utils.truncateFile(outputFile, fileSize1);
         }
     }

app/src/main/java/org/emunix/unipatcher/patcher/APS_N64.java

@@ -47,7 +47,7 @@ public class APS_N64 extends Patcher {
     }
 
     @Override
-    public void apply() throws PatchException, IOException {
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
         BufferedInputStream romStream = null;
         BufferedInputStream patchStream = null;
         BufferedOutputStream outputStream = null;
@@ -96,8 +96,10 @@ public class APS_N64 extends Patcher {
                 int country = patchStream.read();
                 byte[] crc = new byte[8];
                 patchStream.read(crc);
-                if (!validateROM(endianness, cardID, country, crc))
-                    throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+                if (!ignoreChecksum) {
+                    if (!validateROM(endianness, cardID, country, crc))
+                        throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+                }
                 // skip bytes for future expansion
                 byte[] skip = new byte[5];
                 patchStream.read(skip);

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

@@ -50,7 +50,7 @@ public class BPS extends Patcher {
     }
 
     @Override
-    public void apply() throws PatchException, IOException {
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
 
         if (patchFile.length() < 19) {
             throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
@@ -68,9 +68,11 @@ public class BPS extends Patcher {
             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));
+            if (!ignoreChecksum) {
+                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();
@@ -133,9 +135,11 @@ public class BPS extends Patcher {
             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));
+        if(!ignoreChecksum) {
+            long realOutCrc = FileUtils.checksumCRC32(outputFile);
+            if (realOutCrc != bpsCrc.getOutputFileCRC())
+                throw new PatchException(context.getString(R.string.notify_error_wrong_checksum_after_patching));
+        }
     }
 
     // decode pointer

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

@@ -42,7 +42,7 @@ public class DPS extends Patcher {
     }
 
     @Override
-    public void apply() throws PatchException, IOException {
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
 
         if (patchFile.length() < MIN_SIZE_PATCH) {
             throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
@@ -63,9 +63,11 @@ public class DPS extends Patcher {
                 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));
+            if (!ignoreChecksum) {
+                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");

app/src/main/java/org/emunix/unipatcher/patcher/EBP.java

@@ -68,12 +68,12 @@ public class EBP extends Patcher {
     }
 
     @Override
-    public void apply() throws PatchException, IOException {
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
         File cleanRom = File.createTempFile("rom", null, context.getCacheDir());
         File ipsPatch = File.createTempFile("patch", null, context.getCacheDir());
         try {
             Utils.copyFile(context, romFile, cleanRom);
-            prepareCleanRom(cleanRom);
+            prepareCleanRom(cleanRom, ignoreChecksum);
 
             EBPtoIPS(patchFile, ipsPatch);
 
@@ -85,7 +85,7 @@ public class EBP extends Patcher {
         }
     }
 
-    private void prepareCleanRom(File file) throws IOException, PatchException {
+    private void prepareCleanRom(File file, boolean ignoreChecksum) throws IOException, PatchException {
         // delete smc header
         SnesSmcHeader smc = new SnesSmcHeader();
         try {
@@ -95,8 +95,10 @@ public class EBP extends Patcher {
         }
 
         // check rom size and remove unused expanded space
-        if (file.length() < EB_CLEAN_ROM_SIZE)
-            throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+        if (!ignoreChecksum) {
+            if (file.length() < EB_CLEAN_ROM_SIZE)
+                throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+        }
         if (file.length() > EB_CLEAN_ROM_SIZE && checkExpanded(file))
             removeExpanded(file);
 

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

@@ -50,6 +50,10 @@ public class IPS extends Patcher {
     }
 
     @Override
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
+        apply();
+    }
+
     public void apply() throws PatchException, IOException {
         BufferedInputStream romStream = null;
         BufferedInputStream patchStream = null;

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

@@ -68,7 +68,7 @@ public class PPF extends Patcher {
     }
 
     @Override
-    public void apply() throws PatchException, IOException {
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
         if (patchFile.length() < 61) {
             throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
         }
@@ -78,10 +78,10 @@ public class PPF extends Patcher {
                 applyPPF1();
                 break;
             case 2:
-                applyPPF2();
+                applyPPF2(ignoreChecksum);
                 break;
             case 3:
-                applyPPF3();
+                applyPPF3(ignoreChecksum);
                 break;
             default:
                 throw new PatchException(context.getString(R.string.notify_error_not_ppf_patch));
@@ -112,15 +112,17 @@ public class PPF extends Patcher {
         }
     }
 
-    private void applyPPF2() throws IOException, PatchException {
+    private void applyPPF2(boolean ignoreChecksum) 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));
+            if (!ignoreChecksum) {
+                if (romSize != romFile.length()) {
+                    throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+                }
             }
 
             outputStream = new RandomAccessFile(outputFile, "rw");
@@ -131,8 +133,10 @@ public class PPF extends Patcher {
             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));
+            if (!ignoreChecksum) {
+                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();
@@ -160,7 +164,7 @@ public class PPF extends Patcher {
         }
     }
 
-    private void applyPPF3() throws IOException, PatchException {
+    private void applyPPF3(boolean ignoreChecksum) throws IOException, PatchException {
         try {
             patchStream = new RandomAccessFile(patchFile, "r");
             outputStream = new RandomAccessFile(outputFile, "rw");
@@ -182,8 +186,10 @@ public class PPF extends Patcher {
                 }
                 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));
+                if (!ignoreChecksum) {
+                    if (!Arrays.equals(patchBinaryBlock, romBinaryBlock))
+                        throw new PatchException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+                }
             }
 
             // Calculate end of patch data

app/src/main/java/org/emunix/unipatcher/patcher/Patcher.java

@@ -37,5 +37,5 @@ public abstract class Patcher {
         outputFile = output;
     }
 
-    public abstract void apply() throws PatchException, IOException;
+    public abstract void apply(boolean ignoreChecksum) throws PatchException, IOException;
 }

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

@@ -44,7 +44,7 @@ public class UPS extends Patcher {
     }
 
     @Override
-    public void apply() throws PatchException, IOException {
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
 
         if (patchFile.length() < 18) {
             throw new PatchException(context.getString(R.string.notify_error_patch_corrupted));
@@ -90,7 +90,9 @@ public class UPS extends Patcher {
                 ySize = tmp;
                 upsCrc.swapInOut();
             } else {
-                throw new IOException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+                if (!ignoreChecksum) {
+                    throw new IOException(context.getString(R.string.notify_error_rom_not_compatible_with_patch));
+                }
             }
 
             romStream = new BufferedInputStream(new FileInputStream(romFile));
@@ -125,9 +127,11 @@ public class UPS extends Patcher {
             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));
+        if (!ignoreChecksum) {
+            long realOutCrc = FileUtils.checksumCRC32(outputFile);
+            if (realOutCrc != upsCrc.getOutputFileCRC())
+                throw new PatchException(context.getString(R.string.notify_error_wrong_checksum_after_patching));
+        }
     }
 
     // decode pointer

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

@@ -1,5 +1,5 @@
 /*
-Copyright (C) 2016 Boris Timofeev
+Copyright (C) 2016-2017 Boris Timofeev
 
 This file is part of UniPatcher.
 
@@ -35,17 +35,20 @@ public class XDelta extends Patcher {
     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_UNABLE_OPEN_SOURCE = -5004;
+    private static final int ERR_UNABLE_OPEN_MODIFIED = -5005;
     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 static native int xdelta3apply(String patchPath, String romPath, String outputPath, boolean ignoreChecksum);
+    public static native int xdelta3create(String patchPath, String sourcePath, String modifiedPath);
 
     public XDelta(Context context, File patch, File rom, File output) {
         super(context, patch, rom, output);
     }
 
     @Override
-    public void apply() throws PatchException, IOException {
+    public void apply(boolean ignoreChecksum) throws PatchException, IOException {
         if (checkXDelta1(patchFile))
             throw new PatchException(context.getString(R.string.notify_error_xdelta1_unsupported));
 
@@ -55,7 +58,7 @@ public class XDelta extends Patcher {
             throw new PatchException(context.getString(R.string.notify_error_failed_load_lib_xdelta3));
         }
 
-        int ret = xdelta3apply(patchFile.getPath(), romFile.getPath(), outputFile.getPath());
+        int ret = xdelta3apply(patchFile.getPath(), romFile.getPath(), outputFile.getPath(), ignoreChecksum);
 
         switch (ret) {
             case NO_ERROR:
@@ -78,6 +81,32 @@ public class XDelta extends Patcher {
         }
     }
 
+    public void create() throws PatchException, IOException {
+        try {
+            System.loadLibrary("xdelta3");
+        } catch (UnsatisfiedLinkError e) {
+            throw new PatchException(context.getString(R.string.notify_error_failed_load_lib_xdelta3));
+        }
+
+        int ret = xdelta3create(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_SOURCE:
+                throw new PatchException(context.getString(R.string.notify_error_unable_open_file)
+                        .concat(" ").concat(romFile.getName()));
+            case ERR_UNABLE_OPEN_MODIFIED:
+                throw new PatchException(context.getString(R.string.notify_error_unable_open_file)
+                        .concat(" ").concat(outputFile.getName()));
+            default:
+                throw new PatchException(context.getString(R.string.notify_error_unknown));
+        }
+    }
+
     public boolean checkXDelta1(File file) throws IOException {
         String[] MAGIC_XDELTA1 = {"%XDELTA%", "%XDZ000%", "%XDZ001%",
                 "%XDZ002%", "%XDZ003%", "%XDZ004%"};

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

@@ -29,6 +29,7 @@ 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.CardView;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.Toolbar;
@@ -63,6 +64,7 @@ public class FilePickerActivity extends AppCompatActivity implements FilePickerA
     private RecyclerView list;
     private FilePickerAdapter listAdapter;
     private TextView permissionErrorText;
+    private CardView card;
 
     private TextView crc32;
     private TextView md5;
@@ -104,6 +106,7 @@ public class FilePickerActivity extends AppCompatActivity implements FilePickerA
         permissionErrorText = (TextView) findViewById(R.id.empty_view);
 
         list = (RecyclerView) findViewById(R.id.list);
+        card = (CardView) findViewById(R.id.card);
         try {
             list.setHasFixedSize(true);
         } catch (NullPointerException e) {/* TODO log */}
@@ -201,7 +204,7 @@ public class FilePickerActivity extends AppCompatActivity implements FilePickerA
 
         if (currentDir.getParent() != null && currentDir.getParentFile().canRead()) {
             entry = new FileEntry();
-            entry.setIcon(R.drawable.ic_folder_upload_grey600_24dp);
+            entry.setIcon(R.drawable.folder_upload);
             entry.setName("..");
             fileList.add(entry);
         }
@@ -211,15 +214,15 @@ public class FilePickerActivity extends AppCompatActivity implements FilePickerA
                 continue;
             if (file.isDirectory()) {
                 entry = new FileEntry();
-                entry.setIcon(R.drawable.ic_folder_grey600_24dp);
+                entry.setIcon(R.drawable.folder);
                 entry.setName(file.getName());
                 fileList.add(entry);
             } else {
                 entry = new FileEntry();
                 if (Utils.isPatch(file)) {
-                    entry.setIcon(R.drawable.ic_healing_grey600_24dp);
+                    entry.setIcon(R.drawable.healing);
                 } else {
-                    entry.setIcon(R.drawable.ic_insert_drive_file_grey600_24dp);
+                    entry.setIcon(R.drawable.file);
                 }
                 entry.setName(file.getName());
                 fileList.add(entry);
@@ -274,11 +277,11 @@ public class FilePickerActivity extends AppCompatActivity implements FilePickerA
 
     private void showPermissionError(boolean on) {
         if (on) {
-            list.setVisibility(View.GONE);
+            card.setVisibility(View.GONE);
             permissionErrorText.setVisibility(View.VISIBLE);
         } else {
             permissionErrorText.setVisibility(View.GONE);
-            list.setVisibility(View.VISIBLE);
+            card.setVisibility(View.VISIBLE);
         }
     }
 

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

@@ -25,6 +25,7 @@ import android.net.Uri;
 import android.os.Bundle;
 import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.NavigationView;
+import android.support.design.widget.Snackbar;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
@@ -35,29 +36,27 @@ import android.support.v7.app.AppCompatActivity;
 import android.support.v7.app.AppCompatDelegate;
 import android.support.v7.preference.PreferenceManager;
 import android.support.v7.widget.Toolbar;
-import android.util.Log;
 import android.view.MenuItem;
 import android.view.View;
 
-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.Settings;
+import org.emunix.unipatcher.UniPatcher;
 import org.emunix.unipatcher.ui.fragment.ActionFragment;
+import org.emunix.unipatcher.ui.fragment.CreatePatchFragment;
 import org.emunix.unipatcher.ui.fragment.PatchingFragment;
 import org.emunix.unipatcher.ui.fragment.SmdFixChecksumFragment;
 import org.emunix.unipatcher.ui.fragment.SnesSmcHeaderFragment;
 
+import java.util.Random;
+
 import static android.support.v7.app.AppCompatDelegate.MODE_NIGHT_AUTO;
 import static android.support.v7.app.AppCompatDelegate.MODE_NIGHT_NO;
 import static android.support.v7.app.AppCompatDelegate.MODE_NIGHT_YES;
 
 public class MainActivity extends AppCompatActivity
         implements NavigationView.OnNavigationItemSelectedListener {
-    private static final String LOG_TAG = "org.emunix.unipatcher";
-
-    private FirebaseAnalytics firebaseAnalytics;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -65,10 +64,6 @@ public class MainActivity extends AppCompatActivity
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        firebaseAnalytics = FirebaseAnalytics.getInstance(this);
-        if (BuildConfig.DEBUG)
-            firebaseAnalytics.setAnalyticsCollectionEnabled(false);
-
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
@@ -87,8 +82,6 @@ public class MainActivity extends AppCompatActivity
                 if (fragment != null) {
                     boolean ret = fragment.runAction();
                 }
-                //Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
-                //        .setAction("Action", null).show();
             }
         });
 
@@ -100,6 +93,7 @@ public class MainActivity extends AppCompatActivity
         }
 
         parseArgument();
+        showDonateSnackbar();
     }
 
     private void setTheme() {
@@ -124,10 +118,12 @@ public class MainActivity extends AppCompatActivity
 
         if (id == R.id.nav_apply_patch) {
             selectDrawerItem(0);
-        } else if (id == R.id.nav_smd_fix_checksum) {
+        } else if (id == R.id.nav_create_patch) {
             selectDrawerItem(1);
-        } else if (id == R.id.nav_snes_add_del_smc_header) {
+        } else if (id == R.id.nav_smd_fix_checksum) {
             selectDrawerItem(2);
+        } else if (id == R.id.nav_snes_add_del_smc_header) {
+            selectDrawerItem(3);
         }
 
         DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
@@ -139,8 +135,7 @@ public class MainActivity extends AppCompatActivity
         } else if (id == R.id.nav_rate) {
             rateApp();
         } else if (id == R.id.nav_donate) {
-            Intent donateIntent = new Intent(this, DonateActivity.class);
-            startActivity(donateIntent);
+            showDonateActivity();
         } else if (id == R.id.nav_share) {
             shareApp();
         } else if (id == R.id.nav_help) {
@@ -156,9 +151,12 @@ public class MainActivity extends AppCompatActivity
         Fragment fragment;
         switch (position) {
             case 1:
-                fragment = new SmdFixChecksumFragment();
+                fragment = new CreatePatchFragment();
                 break;
             case 2:
+                fragment = new SmdFixChecksumFragment();
+                break;
+            case 3:
                 fragment = new SnesSmcHeaderFragment();
                 break;
             default:
@@ -173,13 +171,51 @@ public class MainActivity extends AppCompatActivity
     private void parseArgument() {
         try {
             String arg = getIntent().getData().getPath();
-            Globals.setCmdArgument(arg);
-            Log.d(LOG_TAG, "Cmd argument: " + arg);
+            UniPatcher.setAppArgument(arg);
         } catch (NullPointerException e) {
-            Log.e(LOG_TAG, "NullPointerException in argument fetching");
+            // The application is not opened from the file manager
         }
     }
 
+    private void showDonateSnackbar() {
+        // don't show snackbar if the user did not patch the file successfully
+        if (!Settings.getPatchingSuccessful(this))
+            return;
+
+        // don't show snackbar some time if the user swiped off it before
+        int count = Settings.getDontShowDonateSnackbarCount(this);
+        if (count != 0) {
+            Settings.setDontShowDonateSnackbarCount(this, --count);
+            return;
+        }
+
+        // don't show snackbar each time you open the application
+        if (new Random().nextInt(6) != 0)
+            return;
+
+        Snackbar.make(findViewById(R.id.content_frame), R.string.main_activity_donate_snackbar_text, Snackbar.LENGTH_INDEFINITE)
+                    .setAction(R.string.main_activity_donate_snackbar_button, new View.OnClickListener() {
+                        @Override
+                        public void onClick(View v) {
+                            showDonateActivity();
+                        }
+                    })
+                    .addCallback(new Snackbar.Callback() {
+                        @Override
+                        public void onDismissed(Snackbar snackbar, int event) {
+                            if (event == Snackbar.Callback.DISMISS_EVENT_SWIPE) {
+                                Settings.setDontShowDonateSnackbarCount(getApplicationContext(), 30);
+                            }
+                        }
+                    }
+                    ).show();
+    }
+
+    private void showDonateActivity() {
+        Intent donateIntent = new Intent(this, DonateActivity.class);
+        startActivity(donateIntent);
+    }
+
     private void shareApp() {
         Intent shareIntent = new Intent(Intent.ACTION_SEND);
         shareIntent.setType("text/plain");

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

@@ -0,0 +1,259 @@
+/*
+ Copyright (c) 2017 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.Action;
+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 CreatePatchFragment extends ActionFragment implements View.OnClickListener {
+
+    private static final String LOG_TAG = "org.emunix.unipatcher";
+
+    private TextView sourceNameTextView;
+    private TextView modifiedNameTextView;
+    private TextView patchNameTextView;
+    private String sourcePath = null;
+    private String modifiedPath = null;
+    private String patchPath = null;
+
+    public CreatePatchFragment() {
+    }
+
+    @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.create_patch_fragment, container, false);
+
+        sourceNameTextView = (TextView) view.findViewById(R.id.sourceFileNameTextView);
+        modifiedNameTextView = (TextView) view.findViewById(R.id.modifiedFileNameTextView);
+        patchNameTextView = (TextView) view.findViewById(R.id.patchFileNameTextView);
+
+        CardView sourceCardView = (CardView) view.findViewById(R.id.sourceFileCardView);
+        sourceCardView.setOnClickListener(this);
+        CardView modifiedCardView = (CardView) view.findViewById(R.id.modifiedFileCardView);
+        modifiedCardView.setOnClickListener(this);
+        CardView patchCardView = (CardView) view.findViewById(R.id.patchFileCardView);
+        patchCardView.setOnClickListener(this);
+
+        restoreState(savedInstanceState);
+
+        setFonts(view);
+
+        // Set action bar title
+        getActivity().setTitle(R.string.nav_create_patch);
+
+        return view;
+    }
+
+    private void setFonts(View view) {
+        TextView sourceLabel = (TextView) view.findViewById(R.id.sourceFileLabel);
+        TextView modifiedLabel = (TextView) view.findViewById(R.id.modifiedFileLabel);
+        TextView patchLabel = (TextView) view.findViewById(R.id.patchFileLabel);
+
+        Typeface roboto_light = Typeface.createFromAsset(getActivity().getAssets(), "fonts/Roboto-Light.ttf");
+
+        sourceLabel.setTypeface(roboto_light);
+        modifiedLabel.setTypeface(roboto_light);
+        patchLabel.setTypeface(roboto_light);
+        sourceNameTextView.setTypeface(roboto_light);
+        modifiedNameTextView.setTypeface(roboto_light);
+        patchNameTextView.setTypeface(roboto_light);
+    }
+
+    private void restoreState(Bundle savedInstanceState) {
+        if (savedInstanceState != null) {
+            sourcePath = savedInstanceState.getString("sourcePath");
+            modifiedPath = savedInstanceState.getString("modifiedPath");
+            patchPath = savedInstanceState.getString("patchPath");
+            if (sourcePath != null)
+                sourceNameTextView.setText(new File(sourcePath).getName());
+            if (modifiedPath != null)
+                modifiedNameTextView.setText(new File(modifiedPath).getName());
+            if (patchPath != null)
+                patchNameTextView.setText(new File(patchPath).getName());
+        }
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle savedInstanceState) {
+        super.onSaveInstanceState(savedInstanceState);
+        savedInstanceState.putString("sourcePath", sourcePath);
+        savedInstanceState.putString("modifiedPath", modifiedPath);
+        savedInstanceState.putString("patchPath", patchPath);
+    }
+
+    @Override
+    public void onClick(View view) {
+        Intent intent = new Intent(getActivity(), FilePickerActivity.class);
+        switch (view.getId()) {
+            case R.id.sourceFileCardView:
+                intent.putExtra("title", getString(R.string.file_picker_activity_title_select_source_file));
+                intent.putExtra("directory", Settings.getRomDir(getActivity()));
+                startActivityForResult(intent, Action.SELECT_SOURCE_FILE);
+                break;
+            case R.id.modifiedFileCardView:
+                intent.putExtra("title", getString(R.string.file_picker_activity_title_select_modified_file));
+                intent.putExtra("directory", Settings.getRomDir(getActivity()));
+                startActivityForResult(intent, Action.SELECT_MODIFIED_FILE);
+                break;
+            case R.id.patchFileCardView:
+                renamePatchFile();
+                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);
+
+            switch (requestCode) {
+                case Action.SELECT_SOURCE_FILE:
+                    sourcePath = path;
+                    sourceNameTextView.setVisibility(View.VISIBLE);
+                    sourceNameTextView.setText(fpath.getName());
+                    Settings.setLastRomDir(getActivity(), fpath.getParent());
+                    break;
+                case Action.SELECT_MODIFIED_FILE:
+                    modifiedPath = path;
+                    modifiedNameTextView.setVisibility(View.VISIBLE);
+                    modifiedNameTextView.setText(fpath.getName());
+                    Settings.setLastRomDir(getActivity(), fpath.getParent());
+                    patchPath = makeOutputPath(path);
+                    patchNameTextView.setText(new File(patchPath).getName());
+                    break;
+            }
+        }
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+
+    private String makeOutputPath(String fullname) {
+        String dir = Settings.getOutputDir(getActivity());
+        if (dir.equals("")) { // get ROM directory
+            dir = FilenameUtils.getFullPath(fullname);
+        }
+        String baseName = FilenameUtils.getBaseName(fullname);
+        return FilenameUtils.concat(dir, baseName.concat(".xdelta"));
+    }
+
+    public boolean runAction() {
+        if (sourcePath == null & modifiedPath == null) {
+            Toast.makeText(getActivity(), getString(R.string.create_patch_fragment_toast_source_and_modified_not_selected), Toast.LENGTH_LONG).show();
+            return false;
+        } else if (sourcePath == null) {
+            Toast.makeText(getActivity(), getString(R.string.create_patch_fragment_toast_source_not_selected), Toast.LENGTH_LONG).show();
+            return false;
+        } else if (modifiedPath == null) {
+            Toast.makeText(getActivity(), getString(R.string.create_patch_fragment_toast_modified_not_selected), Toast.LENGTH_LONG).show();
+            return false;
+        }
+
+        Intent intent = new Intent(getActivity(), WorkerService.class);
+        intent.putExtra("action", Action.CREATE_PATCH);
+        intent.putExtra("sourcePath", sourcePath);
+        intent.putExtra("modifiedPath", modifiedPath);
+        intent.putExtra("patchPath", patchPath);
+        Utils.startForegroundService(getActivity(), intent);
+
+        Toast.makeText(getActivity(), R.string.toast_create_patch_started_check_notify, Toast.LENGTH_SHORT).show();
+        return true;
+    }
+
+    private void renamePatchFile() {
+        if (modifiedPath == null) {
+            Toast.makeText(getActivity(), getString(R.string.create_patch_fragment_toast_modified_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(patchNameTextView.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("")) {
+                    Toast.makeText(getActivity(), R.string.dialog_rename_error_empty_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();
+                }
+                String newPath = new File(patchPath).getParent().concat(File.separator).concat(newName);
+                if (FilenameUtils.equals(newPath, sourcePath) || FilenameUtils.equals(newPath, modifiedPath)) {
+                    Toast.makeText(getActivity(), R.string.dialog_rename_error_same_name, Toast.LENGTH_LONG).show();
+                    return;
+                }
+                patchNameTextView.setText(newName);
+                patchPath = newPath;
+            }
+        });
+        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/PatchingFragment.java

@@ -36,9 +36,10 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import org.apache.commons.io.FilenameUtils;
-import org.emunix.unipatcher.Globals;
+import org.emunix.unipatcher.Action;
 import org.emunix.unipatcher.R;
 import org.emunix.unipatcher.Settings;
+import org.emunix.unipatcher.UniPatcher;
 import org.emunix.unipatcher.Utils;
 import org.emunix.unipatcher.WorkerService;
 import org.emunix.unipatcher.ui.activity.FilePickerActivity;
@@ -49,8 +50,6 @@ public class PatchingFragment extends ActionFragment implements View.OnClickList
 
     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;
@@ -97,7 +96,7 @@ public class PatchingFragment extends ActionFragment implements View.OnClickList
     }
 
     private void parseArgument() {
-        patchPath = Globals.getCmdArgument();
+        patchPath = UniPatcher.getAppArgument();
         if (patchPath != null) {
             patchNameTextView.setText(new File(patchPath).getName());
         }
@@ -147,12 +146,12 @@ public class PatchingFragment extends ActionFragment implements View.OnClickList
             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);
+                startActivityForResult(intent, Action.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);
+                startActivityForResult(intent, Action.SELECT_ROM_FILE);
                 break;
             case R.id.outputCardView:
                 renameOutputRom();
@@ -172,7 +171,7 @@ public class PatchingFragment extends ActionFragment implements View.OnClickList
             }
 
             switch (requestCode) {
-                case SELECT_ROM_FILE:
+                case Action.SELECT_ROM_FILE:
                     romPath = path;
                     romNameTextView.setVisibility(View.VISIBLE);
                     romNameTextView.setText(fpath.getName());
@@ -180,7 +179,7 @@ public class PatchingFragment extends ActionFragment implements View.OnClickList
                     outputPath = makeOutputPath(path);
                     outputNameTextView.setText(new File(outputPath).getName());
                     break;
-                case SELECT_PATCH_FILE:
+                case Action.SELECT_PATCH_FILE:
                     patchPath = path;
                     patchNameTextView.setVisibility(View.VISIBLE);
                     patchNameTextView.setText(fpath.getName());
@@ -214,11 +213,11 @@ public class PatchingFragment extends ActionFragment implements View.OnClickList
         }
 
         Intent intent = new Intent(getActivity(), WorkerService.class);
-        intent.putExtra("action", Globals.ACTION_PATCHING);
+        intent.putExtra("action", Action.APPLY_PATCH);
         intent.putExtra("romPath", romPath);
         intent.putExtra("patchPath", patchPath);
         intent.putExtra("outputPath", outputPath);
-        getActivity().startService(intent);
+        Utils.startForegroundService(getActivity(), intent);
 
         Toast.makeText(getActivity(), R.string.toast_patching_started_check_notify, Toast.LENGTH_SHORT).show();
         return true;
@@ -248,6 +247,10 @@ public class PatchingFragment extends ActionFragment implements View.OnClickList
             @Override
             public void onClick(DialogInterface dialog, int which) {
                 String newName = input.getText().toString();
+                if (newName.equals("")) {
+                    Toast.makeText(getActivity(), R.string.dialog_rename_error_empty_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();

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

@@ -31,7 +31,7 @@ import android.view.ViewGroup;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import org.emunix.unipatcher.Globals;
+import org.emunix.unipatcher.Action;
 import org.emunix.unipatcher.R;
 import org.emunix.unipatcher.Settings;
 import org.emunix.unipatcher.Utils;
@@ -43,7 +43,6 @@ 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;
@@ -108,7 +107,7 @@ public class SmdFixChecksumFragment extends ActionFragment implements View.OnCli
             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);
+                startActivityForResult(intent, Action.SELECT_ROM_FILE);
                 break;
         }
     }
@@ -124,7 +123,7 @@ public class SmdFixChecksumFragment extends ActionFragment implements View.OnCli
             }
 
             switch (requestCode) {
-                case SELECT_ROM_FILE:
+                case Action.SELECT_ROM_FILE:
                     romPath = path;
                     romNameTextView.setVisibility(View.VISIBLE);
                     romNameTextView.setText(new File(path).getName());
@@ -142,9 +141,9 @@ public class SmdFixChecksumFragment extends ActionFragment implements View.OnCli
         }
 
         Intent intent = new Intent(getActivity(), WorkerService.class);
-        intent.putExtra("action", Globals.ACTION_SMD_FIX_CHECKSUM);
         intent.putExtra("romPath", romPath);
-        getActivity().startService(intent);
+        intent.putExtra("action", Action.SMD_FIX_CHECKSUM);
+        Utils.startForegroundService(getActivity(), 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

@@ -31,7 +31,7 @@ import android.view.ViewGroup;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import org.emunix.unipatcher.Globals;
+import org.emunix.unipatcher.Action;
 import org.emunix.unipatcher.R;
 import org.emunix.unipatcher.Settings;
 import org.emunix.unipatcher.Utils;
@@ -43,8 +43,6 @@ 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;
@@ -104,10 +102,10 @@ public class SnesSmcHeaderFragment extends ActionFragment implements View.OnClic
             romPath = savedInstanceState.getString("romPath");
             headerPath = savedInstanceState.getString("headerPath");
             action = savedInstanceState.getInt("action");
-            if (action == Globals.ACTION_SNES_ADD_SMC_HEADER) {
+            if (action == 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) {
+            } else if (action == Action.SNES_DELETE_SMC_HEADER) {
                 headerInfoTextView.setText(R.string.snes_smc_header_will_be_removed);
                 headerCardView.setVisibility(View.GONE);
             }
@@ -133,11 +131,11 @@ public class SnesSmcHeaderFragment extends ActionFragment implements View.OnClic
             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);
+                startActivityForResult(intent, Action.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);
+                startActivityForResult(intent, Action.SELECT_HEADER_FILE);
                 break;
         }
     }
@@ -153,25 +151,25 @@ public class SnesSmcHeaderFragment extends ActionFragment implements View.OnClic
             }
 
             switch (requestCode) {
-                case SELECT_ROM_FILE:
+                case Action.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;
+                        action = 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;
+                        action = 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:
+                case Action.SELECT_HEADER_FILE:
                     headerPath = path;
                     headerNameTextView.setText(new File(path).getName());
                     break;
@@ -190,9 +188,9 @@ public class SnesSmcHeaderFragment extends ActionFragment implements View.OnClic
         intent.putExtra("action", action);
         intent.putExtra("romPath", romPath);
         intent.putExtra("headerPath", headerPath);
-        getActivity().startService(intent);
+        Utils.startForegroundService(getActivity(), intent);
 
-        if (action == Globals.ACTION_SNES_ADD_SMC_HEADER) {
+        if (action == 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();

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

@@ -0,0 +1,57 @@
+/*
+ Copyright (c) 2017 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 CreatePatchNotify extends Notify {
+
+    public CreatePatchNotify(Context c, String text) {
+        super(c);
+        notifyBuilder.setSmallIcon(R.drawable.ic_gamepad_variant_white_24dp);
+        notifyBuilder.setContentTitle(context.getString(R.string.notify_creating_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_create_patch_complete));
+        notifyBuilder.setContentTitle(context.getText(R.string.notify_create_patch_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/Notify.java

@@ -24,6 +24,7 @@ import android.content.Intent;
 import android.support.v4.app.NotificationCompat;
 import android.support.v4.app.NotificationManagerCompat;
 
+import org.emunix.unipatcher.UniPatcher;
 import org.emunix.unipatcher.ui.activity.MainActivity;
 
 public abstract class Notify {
@@ -40,9 +41,8 @@ public abstract class Notify {
 
         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 = new NotificationCompat.Builder(context, UniPatcher.NOTIFICATION_CHANNEL_ID);
         notifyBuilder.setContentIntent(PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT));
-        //notifyMng = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
         notifyMng = NotificationManagerCompat.from(context);
     }
 

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

@@ -28,7 +28,7 @@ public class PatchingNotify extends Notify {
 
     public PatchingNotify(Context c, String text) {
         super(c);
-        notifyBuilder.setSmallIcon(R.drawable.ic_stat_patching);
+        notifyBuilder.setSmallIcon(R.drawable.ic_gamepad_variant_white_24dp);
         notifyBuilder.setContentTitle(context.getString(R.string.notify_applying_patch));
         notifyBuilder.setContentText(text);
         notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(text));

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

@@ -28,7 +28,7 @@ public class SmdFixChecksumNotify extends Notify {
 
     public SmdFixChecksumNotify(Context c, String text) {
         super(c);
-        notifyBuilder.setSmallIcon(R.drawable.ic_stat_patching);
+        notifyBuilder.setSmallIcon(R.drawable.ic_gamepad_variant_white_24dp);
         notifyBuilder.setContentTitle(context.getString(R.string.notify_smd_fix_checksum_in_progress));
         notifyBuilder.setContentText(text);
         notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(text));

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

@@ -27,7 +27,7 @@ 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.setSmallIcon(R.drawable.ic_gamepad_variant_white_24dp);
         notifyBuilder.setContentTitle(context.getString(R.string.notify_snes_add_smc_header_in_progress));
         notifyBuilder.setContentText(text);
         notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(text));

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

@@ -27,7 +27,7 @@ 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.setSmallIcon(R.drawable.ic_gamepad_variant_white_24dp);
         notifyBuilder.setContentTitle(context.getString(R.string.notify_snes_delete_smc_header_in_progress));
         notifyBuilder.setContentText(text);
         notifyBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(text));