Question

我使用切换按钮播放音频文件。当我选中切换按钮时，app会播放音乐。当音乐结束时，我希望它自动取消选中切换按钮。我能怎么做？这是我演奏的音乐方法：

MediaPlayer mp = null;
protected void playmusic(String theText) {
    if (mp != null) {
        mp.reset();
        mp.release();
    }
    if (theText.length() > 2) {

        mp = MediaPlayer.create(this, Uri.parse(theText));
    } else { mp = MediaPlayer.create(this, R.drawable.afart11);
    }
    mp.start();
 }

这是我的切换按钮：

tg = (ToggleButton) findViewById(R.id.toggleButton1);
    tg.setOnClickListener(this);
...
...
case R.id.toggleButton1:
        if (tg.isChecked()) {
            playmusic(Setting.set);
             else {
            mp.stop();
        }

Answer 1

将onCompletionListener设置为MediaPlayer

mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener(){
    @Override 
    public void onCompletion(MediaPlayer mp){
        tg.setChecked(false);
    }
});

Answer 2

实施OnCompletionListener并致电mp.setOnCompletionListener(this)。歌曲结束时会调用回调方法onCompletion(MediaPlayer mp)。

public class YourActivity extends Activity implements OnCompletionListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //media player code
        mp.setOnCompletionListener(this);
    }

    @Override
    public void onCompletion(MediaPlayer mp) {  
        //your code when song completes
    }

}

如何在音乐停止时取消选中切换按钮？

2 个答案: