Remove media service example (#6264)
This example is misleading because it relies on the old services model. Let's remove it until #6263 is fixed.
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Adam Barth
GitHub
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67254ef626
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0975d04972
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// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'package:flutter_services/media.dart' as mojom;
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter/http.dart' as http;
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import 'package:mojo/core.dart' as core;
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// All of these sounds are marked as public domain at soundbible.
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const String chimes = "http://soundbible.com/grab.php?id=2030&type=wav";
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const String chainsaw = "http://soundbible.com/grab.php?id=1391&type=wav";
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const String stag = "http://soundbible.com/grab.php?id=2073&type=wav";
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const String frogs = "http://soundbible.com/grab.php?id=2033&type=wav";
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const String rattle = "http://soundbible.com/grab.php?id=2037&type=wav";
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const String iLoveYou = "http://soundbible.com/grab.php?id=2045&type=wav";
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class PianoKey {
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PianoKey(this.color, this.soundUrl);
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final Color color;
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final String soundUrl;
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final mojom.MediaPlayerProxy player = new mojom.MediaPlayerProxy.unbound();
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bool get isPlayerOpen => player.ctrl.isOpen;
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void down() {
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if (!isPlayerOpen) return;
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player.seekTo(0);
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player.start();
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}
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void up() {
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if (!isPlayerOpen) return;
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player.pause();
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}
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Future<Null> load(mojom.MediaServiceProxy mediaService) async {
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try {
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mediaService.createPlayer(player);
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http.Response response = await http.get(soundUrl);
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core.MojoDataPipe pipe = new core.MojoDataPipe();
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core.DataPipeFiller.fillHandle(pipe.producer, response.bodyBytes.buffer.asByteData());
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player.prepare(pipe.consumer, (bool ignored) { });
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} catch (e) {
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print("Error: failed to load sound file $soundUrl");
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player.close();
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}
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}
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}
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class PianoApp extends StatelessWidget {
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final List<PianoKey> keys = <PianoKey>[
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new PianoKey(Colors.red[500], chimes),
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new PianoKey(Colors.orange[500], chainsaw),
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new PianoKey(Colors.yellow[500], stag),
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new PianoKey(Colors.green[500], frogs),
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new PianoKey(Colors.blue[500], rattle),
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new PianoKey(Colors.purple[500], iLoveYou),
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];
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Future<Null> loadSounds() async {
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mojom.MediaServiceProxy mediaService = shell.connectToApplicationService(
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'mojo:media_service', mojom.MediaService.connectToService
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);
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try {
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List<Future<Null>> pending = <Future<Null>>[];
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for (PianoKey key in keys)
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pending.add(key.load(mediaService));
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await Future.wait(pending);
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} finally {
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mediaService.close();
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}
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}
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@override
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Widget build(BuildContext context) {
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List<Widget> children = <Widget>[];
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for (PianoKey key in keys) {
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children.add(new Flexible(
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child: new Listener(
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child: new Container(
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decoration: new BoxDecoration(backgroundColor: key.color)
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),
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onPointerCancel: (_) => key.up(),
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onPointerDown: (_) => key.down(),
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onPointerUp: (_) => key.up()
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)
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));
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}
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return new Column(children: children);
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}
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}
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Widget statusBox(Widget child) {
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const Color mediumGray = const Color(0xff555555);
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const Color darkGray = const Color(0xff222222);
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return new Center(
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child: new Container(
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decoration: const BoxDecoration(
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boxShadow: const <BoxShadow>[
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const BoxShadow(
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color: mediumGray, offset: const Offset(6.0, 6.0), blurRadius: 5.0)
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],
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backgroundColor: darkGray
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),
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height: 90.0,
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padding: const EdgeInsets.all(8.0),
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margin: const EdgeInsets.symmetric(horizontal: 50.0),
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child: new Center(child: child)
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)
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);
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}
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Widget splashScreen() {
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return statusBox(
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new Text(
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'Loading sound files!',
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style: new TextStyle(fontSize: 18.0)
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)
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);
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}
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Future<Null> main() async {
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runApp(splashScreen());
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PianoApp app = new PianoApp();
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// use "await" to make sure the sound files are loaded before we show the ui.
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await app.loadSounds();
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runApp(app);
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// runApp() returns immediately so you can't put application cleanup code
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// here. Android apps can be killed at any time, so there's also no way to
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// catch a close event to do cleanup. Therefore, although we appear to be
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// leaking the "player" handles, this is working as intended and the operating
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// system will clean up when the activity is killed.
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}
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