Music does not play after clicking back key and returning to activity in Android

I am trying to play Audio using videoView using MediaController. The Audio is playing well, when I click back key the controls returns to previous state. But when I select activity again from launch screen, activity appears but music doesnot play. Can anyone help me in sorting out this issue? The code is as follows:

public void onCreate(Bundle savedInstanceS开发者_Go百科tate) {  
        super.onCreate(savedInstanceState);
        setContentView(R.layout.video);

        videoView = (VideoView)this.findViewById(R.id.videoView);
      videoView.setVideoPath("http://www.pocketjourney.com/downloads/pj/video/famous.3gp");
        final MediaController mc = new MediaController(this);
        videoView.setMediaController(mc);
        videoView.setVideoURI(Uri.parse("http://www.pocketjourney.com/downloads/pj/tutorials/audio.mp3"));


        videoView.requestFocus();
        videoView.start();
        videoView.setMediaController(new MediaController(this)
        {
            public void hide()
            {
                System.out.println("HIDEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEHELLLOO");
                mc.show();
            }
        });




}


public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if (keyCode == KeyEvent.KEYCODE_BACK) {        
        moveTaskToBack(true); 
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

Thanks in Advance

If you are trying to play the music only when the activity is in the foreground, you want to start and stop the music in onResume and onPause, not onCreate.

Take a look at the Activity Lifecycle. OnCreate is only invoked once when the activity is created. If the activity goes into the background and then reappears, it may not be called.

# use this code...the song plays even if the user presses his back button #

public void playAudio(){
    MediaPlayer mp = new MediaPlayer();
    try {
        mp.setDataSource("/sdcard/fileaudio.mp3");
        mp.prepare();
        mp.start();
    } catch (IllegalArgumentException 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();
    }   

    mp.setOnCompletionListener(new OnCompletionListener() {

        @Override
        public void onCompletion(MediaPlayer mp) {
            // TODO Auto-generated method stub
            //playAudio();   
        }   
    });   

}
public void onBackPressed() {
    Intent intent = new Intent();
    intent
        .setAction(Intent.ACTION_MAIN)
        .addCategory(Intent.CATEGORY_HOME)
        .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(intent);

    finish();
}