private void playAudio(String audioUri){

Uri uri = Uri.parse(audioUri);

mMediaPlayer = MediaPlayer.create(getApplicationContext(), uri);

try {

//在播放之前先判断playerMusic是否被占用，这样就不会报错了

if (mMediaPlayer != null) {

mMediaPlayer.stop();

}

mMediaPlayer.prepare();

mMediaPlayer.start();

} catch (IllegalStateException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

另一种解决办法：

try {
if (!isPlaying) {
isPlaying = true;
//装载资源
mediaPlayer = MediaPlayer.create(PlaySDMp3Activity.this, R.raw.trouble);
isReleased = false;
mediaPlayer.setLooping(true);

mediaPlayer.start();
mTextView.setText("当前正在播放音乐！");
}
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

MediaPlayer.create(context,resId)这个方式配置数据源后，就完成了初始化，所以不用prepare可以直接start了