Added saving/loading

lib/Entry.dart

@@ -7,12 +7,12 @@ class Entry {
   Entry(this.date, this.whatYouDid);
 
   Entry.fromJson(Map<String, dynamic> json)
-    : date = json['date'],
+    : date = DateTime.parse(json['date']),
       whatYouDid = json['whatyoudid'];
 
   Map<String, dynamic> toJson() =>
       {
-        'date': date,
+        'date': date.toString(),
         'whatyoudid': whatYouDid,
       };
 

lib/FileLoader.dart

@@ -0,0 +1,36 @@
+import 'dart:async';
+import 'dart:io';
+
+import 'package:path_provider/path_provider.dart';
+
+class FileLoader {
+  Future<String> get _localPath async {
+    final directory = await getApplicationDocumentsDirectory();
+
+    return directory.path;
+  }
+
+  Future<File> get _localFile async {
+    final path = await _localPath;
+    return new File('$path/days.json');
+  }
+
+  Future<File> writeFile(String data) async {
+    final file = await _localFile;
+
+    return file.writeAsString(data);
+  }
+
+  Future<String> readFile() async {
+    try {
+      final file = await _localFile;
+
+      String contents = await file.readAsString();
+
+      return contents;
+    } catch (e) {
+      throw OSError("File not found");
+    }
+  }
+
+}

lib/NoZeroDays.dart

@@ -1,7 +1,9 @@
 import 'dart:async';
+import 'dart:convert';
 
 import 'package:flutter/material.dart';
 import 'package:nomorezerodays/Entry.dart';
+import 'package:nomorezerodays/FileLoader.dart';
 
 class NoZeroDays extends StatefulWidget {
   NoZeroDays({Key key, this.title}) : super(key: key);
@@ -86,7 +88,6 @@ class _NoZeroDaysState extends State<NoZeroDays> {
                             .add(new Entry(newValue, entry.whatYouDid));
                       });
                     }
-                    ;
                     Navigator.pop(context);
                   }).catchError((err) {
                     Scaffold.of(context).showSnackBar(
@@ -121,6 +122,30 @@ class _NoZeroDaysState extends State<NoZeroDays> {
     }));
   }
 
+  void _save() {
+    FileLoader f = new FileLoader();
+
+    f.writeFile(json.encode(_zerodayslist));
+
+  }
+
+  void _load() {
+    FileLoader f = new FileLoader();
+
+    f.readFile().then((s) {
+      print(s);
+      setState(() {
+        List<Entry> newList = <Entry>[];
+        List<dynamic> tempList = json.decode(s);
+
+        for (var i = 0; i < tempList.length; ++i) {
+          newList.add(Entry.fromJson(tempList[i]));
+        }
+        _zerodayslist = newList;
+      });
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     // This method is rerun every time setState is called, for instance as done
@@ -132,6 +157,10 @@ class _NoZeroDaysState extends State<NoZeroDays> {
     return new Scaffold(
       appBar: new AppBar(
         title: new Text(widget.title),
+        actions: <Widget>[
+          new IconButton(icon: new Icon(Icons.save), onPressed: _save),
+          new IconButton(icon: new Icon(Icons.file_upload), onPressed: _load),
+        ]
       ),
       body: new Scaffold(body: new ListView.builder(
         itemBuilder: (context, entry) {

nomorezerodays.iml

@@ -10,5 +10,6 @@
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" name="Dart SDK" level="project" />
     <orderEntry type="library" name="Dart Packages" level="project" />
+    <orderEntry type="library" name="Flutter Plugins" level="project" />
   </component>
 </module>

pubspec.lock

@@ -214,6 +214,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.5.1"
+  path_provider:
+    dependency: "direct main"
+    description:
+      name: path_provider
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.4.0"
   plugin:
     dependency: transitive
     description:
@@ -375,3 +382,4 @@ packages:
     version: "2.1.13"
 sdks:
   dart: ">=2.0.0-dev.52.0 <=2.0.0-edge.af1436931b93e755d38223c487d33a0a1f5eadf5"
+  flutter: ">=0.1.4 <2.0.0"

pubspec.yaml

@@ -10,6 +10,8 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^0.1.0
 
+  path_provider: ^0.4.0
+
 dev_dependencies:
   flutter_test:
     sdk: flutter