MediaPlayer从/ res / raw播放下一首曲目

Question

I'm making an lullaby app.Initially there are two tracks in my /res/raw folder. On completing first track I want it to play next track. i did this using onCompletionListener.But it is showing force close error. Below is my code for that. So can anyone tell me how to do that?

public class PlayRandom extends Activity implements OnCompletionListener{
        MediaPlayer mp;
    int rnum;
    TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.playrandom);
                mp.setOnCompletionListener(this);
        mp = MediaPlayer.create(this, R.raw.lullaby1);
        mp.start();     
    }
    @Override
    public void finish() {
        // TODO Auto-generated method stub
        super.finish();
        mp.stop();
    }
    public void onCompletion(MediaPlayer mp) {
        // TODO Auto-generated method stub
        File pdfFile = new File("res/raw/lullaby2.mp3");
        Uri path = Uri.fromFile(pdfFile);
        mp.stop();
        try{
            mp.setDataSource(getApplicationContext(), path);
        mp.prepare();
        mp.start();
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SecurityException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }   
    }
}

---

I tried this but still its not working. That meand there's something wrong in OnClickListener.

public class PlayRandom extends Activity implements OnCompletionListener{
    MediaPlayer mp;
int rnum;
TextView tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.playrandom);
            mp.setOnCompletionListener(this);
    mp = MediaPlayer.create(this, R.raw.lullaby1);
    mp.start();     
}
@Override
public void finish() {
    // TODO Auto-generated method stub
    super.finish();
    mp.stop();
}
public void onCompletion(MediaPlayer mp) {
    // TODO Auto-generated method stub
    Toast.makeText(this,"Yuppieee!!", Toast.LENGTH_SHORT);
}

}

Answer 1

use AssetFileDescriptor for playing file from raw folder:

   AssetFileDescriptor afdes = getAssets().openRawResourceFd(R.raw.lullaby2);
    mp.reset();
    mp.setDataSource(afdes.getFileDescriptor(), afdes.getStartOffset(), afdes.getLength());
    mp.prepare();
    mp.start();