android 播放音乐媒体文件（二）

MediaPlayer使用

官方文档：

https://developer.android.com/guide/topics/media/mediaplayer.html

示例代码：

首先网络音频资源别忘加权限

<uses-permission android:name="android.permission.INTERNET" />

如果需要保持屏幕常亮做如下设置：

uses the MediaPlayer.setScreenOnWhilePlaying() or MediaPlayer.setWakeMode()

加权限：<uses-permission android:name="android.permission.WAKE_LOCK" />

支持三种来源音频资源

• Local resources
• Internal URIs, such as one you might obtain from a Content Resolver
• External URLs (streaming)

简单地说是：apk里raw，sd卡，网络

example (saved in your application's res/raw/ directory):

MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.sound_file_1);
mediaPlayer.start(); 

// no need to call prepare(); create() does that for you

不需要调用prepare()方法，create()方法帮你做了。

Uri类型，sdcard等。示例如下：

Uri myUri = ....; // initialize Uri here
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource(getApplicationContext(), myUri);
mediaPlayer.prepare();
mediaPlayer.start();

网络上的：

String url = "http://........"; // your URL here
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource(url);
mediaPlayer.prepare(); // might take long! (for buffering, etc)可能需很较长时间，因为需要缓冲等
mediaPlayer.start();

示例项目代码：
https://github.com/googlesamples/android-SimpleMediaPlayer

生命周期图：