finish example

lib/main.dart

@@ -1,111 +1,109 @@
+import 'package:audioplayers/audio_cache.dart';
+import 'package:audioplayers/audioplayers.dart';
 import 'package:flutter/material.dart';
 
-void main() => runApp(MyApp());
+typedef void OnError(Exception exception);
 
-class MyApp extends StatelessWidget {
-  // This widget is the root of your application.
+void main() {
+  runApp(new MaterialApp(home: new ExampleApp()));
+}
+
+class ExampleApp extends StatefulWidget {
   @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      title: 'Flutter Demo',
-      theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // Try running your application with "flutter run". You'll see the
-        // application has a blue toolbar. Then, without quitting the app, try
-        // changing the primarySwatch below to Colors.green and then invoke
-        // "hot reload" (press "r" in the console where you ran "flutter run",
-        // or simply save your changes to "hot reload" in a Flutter IDE).
-        // Notice that the counter didn't reset back to zero; the application
-        // is not restarted.
-        primarySwatch: Colors.blue,
+  _ExampleAppState createState() => new _ExampleAppState();
+}
+
+class _ExampleAppState extends State<ExampleApp> {
+  Duration _duration = new Duration();
+  Duration _position = new Duration();
+  AudioPlayer advancedPlayer;
+  AudioCache audioCache;
+
+  @override
+  void initState(){
+    super.initState();
+    initPlayer();
+  }
+
+  void initPlayer(){
+    advancedPlayer = new AudioPlayer();
+    audioCache = new AudioCache(fixedPlayer: advancedPlayer);
+
+    advancedPlayer.durationHandler = (d) => setState(() {
+      _duration = d;
+    });
+
+    advancedPlayer.positionHandler = (p) => setState(() {
+    _position = p;
+    });
+  }
+
+  String localFilePath;
+
+  Widget _tab(List<Widget> children) {
+    return Center(
+      child: Container(
+        padding: EdgeInsets.all(16.0),
+        child: Column(
+          children: children
+              .map((w) => Container(child: w, padding: EdgeInsets.all(6.0)))
+              .toList(),
+        ),
       ),
-      home: MyHomePage(title: 'Flutter Demo Home Page'),
     );
   }
-}
 
-class MyHomePage extends StatefulWidget {
-  MyHomePage({Key key, this.title}) : super(key: key);
+  Widget _btn(String txt, VoidCallback onPressed) {
+    return ButtonTheme(
+        minWidth: 48.0,
+        child: RaisedButton(child: Text(txt), onPressed: onPressed));
+  }
 
-  // This widget is the home page of your application. It is stateful, meaning
-  // that it has a State object (defined below) that contains fields that affect
-  // how it looks.
+  Widget slider() {
+    return Slider(
+        value: _position.inSeconds.toDouble(),
+        min: 0.0,
+        max: _duration.inSeconds.toDouble(),
+        onChanged: (double value) {
+          setState(() {
+            seekToSecond(value.toInt());
+            value = value;
+          });});
+  }
 
-  // This class is the configuration for the state. It holds the values (in this
-  // case the title) provided by the parent (in this case the App widget) and
-  // used by the build method of the State. Fields in a Widget subclass are
-  // always marked "final".
+  Widget localAsset() {
+    return _tab([
+      Text('Play Local Asset \'audio.mp3\':'),
+      _btn('Play', () => audioCache.play('audio.mp3')),
+      _btn('Pause',() => advancedPlayer.pause()),
+      _btn('Stop', () => advancedPlayer.stop()),
+      slider()
+    ]);
+  }
 
-  final String title;
+  void seekToSecond(int second){
+    Duration newDuration = Duration(seconds: second);
 
-  @override
-  _MyHomePageState createState() => _MyHomePageState();
-}
-
-class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
-
-  void _incrementCounter() {
-    setState(() {
-      // This call to setState tells the Flutter framework that something has
-      // changed in this State, which causes it to rerun the build method below
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
-    });
+    advancedPlayer.seek(newDuration);
   }
 
   @override
   Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
-    return Scaffold(
-      appBar: AppBar(
-        // Here we take the value from the MyHomePage object that was created by
-        // the App.build method, and use it to set our appbar title.
-        title: Text(widget.title),
-      ),
-      body: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        child: Column(
-          // Column is also layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Invoke "debug painting" (press "p" in the console, choose the
-          // "Toggle Debug Paint" action from the Flutter Inspector in Android
-          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
-          // to see the wireframe for each widget.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            Text(
-              'You have pushed the button this many times:',
-            ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.display1,
-            ),
-          ],
+    return DefaultTabController(
+      length: 1,
+      child: Scaffold(
+        appBar: AppBar(
+          bottom: TabBar(
+            tabs: [
+              Tab(text: 'Local Asset'),
+            ],
+          ),
+          title: Text('audioplayers Example'),
+        ),
+        body: TabBarView(
+          children: [localAsset()],
         ),
       ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
     );
   }
-}
+}

pubspec.yaml

@@ -15,6 +15,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  audioplayers: ^0.7.8
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
@@ -25,6 +26,7 @@ dev_dependencies:
     sdk: flutter
 
 
+
 # For information on the generic Dart part of this file, see the
 # following page: https://www.dartlang.org/tools/pub/pubspec
 
@@ -36,6 +38,8 @@ flutter:
   # the material Icons class.
   uses-material-design: true
 
+  assets:
+    - assets/
   # To add assets to your application, add an assets section, like this:
   # assets:
   #  - images/a_dot_burr.jpeg