Android 当我按Back键或转到其他活动时，如何停止MediaPlayer而不出错
我创建了一个卡拉OK应用程序。但是我不能停止MediaPlayer而不出错。当我按下“后退”按钮回家时，我会听到“对不起，应用程序已停止工作”，如果我尝试启动另一个活动，同样的情况也会发生 这是我的密码Android 当我按Back键或转到其他活动时，如何停止MediaPlayer而不出错,android,media-player,Android,Media Player,我创建了一个卡拉OK应用程序。但是我不能停止MediaPlayer而不出错。当我按下“后退”按钮回家时，我会听到“对不起，应用程序已停止工作”，如果我尝试启动另一个活动，同样的情况也会发生 这是我的密码 public class Main extends Activity implements MediaPlayerControl, OnClickListener { private MediaController mMediaController; private MediaPlayer mM
public class Main extends Activity implements MediaPlayerControl, OnClickListener {
private MediaController mMediaController;
private MediaPlayer mMediaPlayer;
public TextView subtitles;
Handler mHandler = new Handler();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
subtitles = (TextView) findViewById(R.id.subs1);
Button btnvol = (Button) findViewById(R.id.volc);
btnvol.setOnClickListener(this);
mMediaPlayer = new MediaPlayer();
mMediaController = new MediaController(this);
mMediaController.setMediaPlayer(Main.this);
mMediaController.setAnchorView(findViewById(R.id.audioView));
try {
mMediaPlayer
.setDataSource(
this,
Uri.parse("android.resource://com.app.audioplayer/raw/buchatri"));
mMediaPlayer.prepare();
} catch (IllegalStateException e){
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
final long currentPos = mMediaPlayer.getCurrentPosition();
if (currentPos < 5130) {
subtitles.setText("Stupid");
} else if (currentPos > 5130 && currentPos < 10572) {
subtitles.setText("Sorry");
} else if (currentPos > 10572 && currentPos < 10597) {
subtitles.setText("555+");
} else if (currentPos > 15312 && currentPos < 18478) {
subtitles.setText("OMG");
} else if (currentPos > 18478 && currentPos < 24191) {
subtitles.setText("AFK");
} else if (currentPos > 24191 && currentPos < 28137) {
subtitles.setText("Help me !");
} else if (currentPos > 28137 && currentPos < 29500) {
subtitles.setText("Oh no !");
}
mHandler.sendEmptyMessageDelayed(0, 1);
}
};
mHandler.sendEmptyMessage(0);
mMediaPlayer.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
mHandler.post(new Runnable() {
public void run() {
mMediaController.show(0);
mMediaPlayer.start();
}
});
}
});
}
protected void onDestroy() {
super.onDestroy();
mMediaPlayer.stop();
mMediaPlayer.release();
}
public boolean canPause() {
return true;
}
public boolean canSeekBackward() {
return true;
}
public boolean canSeekForward() {
return true;
}
public int getBufferPercentage() {
int percentage = (mMediaPlayer.getCurrentPosition() * 100)
/ mMediaPlayer.getDuration();
return percentage;
}
public int getCurrentPosition() {
return mMediaPlayer.getCurrentPosition();
}
public int getDuration() {
return mMediaPlayer.getDuration();
}
public boolean isPlaying() {
return mMediaPlayer.isPlaying();
}
@Override
public void pause() {
// TODO Auto-generated method stub
super.onPause();
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.stop();
}
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
public void seekTo(int pos) {
mMediaPlayer.seekTo(pos);
}
public void start() {
mMediaPlayer.start();
}
public boolean onTouchEvent(MotionEvent event) {
mMediaController.show(0);
return false;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
private void releaseMediaPlayer() {
if (mMediaPlayer != null) {
mMediaPlayer.release();
mMediaPlayer = null;
}
}
首先尝试
mMediaPlayer.stop（）mMediaPlayer.release（）