How to close the default media player?

I have started the default media player using the following code:

Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
File file = new File(Environment.getExternalStorageDirectory()+("/background.mp3"));
intent.setDataAndType(Uri.fromFile(file), "audio/*");
startActivity(intent); 

But, when the file is played completely, I want to exit th开发者_JS百科e media player. How do we close the default media player which is started by 'intent'? I have tried using the "startActivityForResult()"... But i don't know where to set the "result"

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MediaPlayer Player2;
Player2= MediaPlayer.create(this, R.raw.music);
Player2.start();

button click event{

Player2.stop();
}

In this example i have use Mediaplayer and i have get my resource from raw folder (res/raw.music.mp3).

i have use stop(); method of media player to stop it

For more here

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you should have to use finish() after statring ur activity...

edit

use mp.release();

private static final String TAG = "VideoPlayer";

private MediaPlayer mp;
private SurfaceView mPreview;

private SurfaceHolder holder;
private ImageButton mPlay;
private ImageButton mPause;
private ImageButton mReset;
private ImageButton mStop;
private String current;

/**
 * Called when the activity is first created.
 */
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);

    setContentView(R.layout.main);

    // Set up the play/pause/reset/stop buttons
    mPreview = (SurfaceView) findViewById(R.id.surface);
    mPath = (EditText) findViewById(R.id.path);
    mPlay = (ImageButton) findViewById(R.id.play);
    mPause = (ImageButton) findViewById(R.id.pause);
    mReset = (ImageButton) findViewById(R.id.reset);
    mStop = (ImageButton) findViewById(R.id.stop);

    mPlay.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            playVideo();
        }
    });
    mPause.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            if (mp != null) {
                mp.pause();
            }
        }
    });
    mReset.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            if (mp != null) {
                mp.seekTo(0);
            }
        }
    });
    mStop.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            if (mp != null) {
                mp.stop();
                mp.release();
            }
        }
    });

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Thanks all for your reply, I got the problem... I had used:

File file = new File(Environment.getExternalStorageDirectory()+("/background.mp3"));

in my code. The Environment.getExternalStorageDirectory() was the problem!!! When i replaced it with "/sdcard/background.mp3" it works properly...