Android : How to still plyaing mediaPlayer in android after press the home button and recevie phone call stop and resume again

Can you tell me how to still plyaing mediaPlayer in android when I press the home button of emulator or phone I want to do when recevie phone call stop video and resume video again that point how should do in this code.

    import android.net.Uri;
    import android.os.Bundle;
    import android.app.Activity;
    import android.content.Intent;
    import android.view.Menu;
    import android.view.View;
    import android.widget.MediaController;
    import android.widget.VideoView;

    public class VideoActivity2 extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);  
    setContentView(R.layout.activity_video2);

    VideoView videoView = (VideoView)this.findViewById(R.id.videoView2);
    videoView.setVideoURI(Uri.parse("android.resource://"+
    getPackageName() +"/"R.raw.song1));
    videoView.setMediaController(new MediaController(this));
    videoView.requestFocus();
    videoView.start();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.video_activity2, menu);
    return true;
    }

    public void startVideoActivity3(View v) {
    Intent intent = new Intent(VideoActivity2.this, VideoActivity3.class);
    startActivity(intent);
    }
    public void startVideoActivity(View v) {
    Intent intent = new Intent(VideoActivity2.this, VideoActivity.class);
    startActivity(intent);
    }
    public void startMainActivity(View v) {
    Intent intent = new Intent(VideoActivity2.this,    

    MainActivity.class);intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    intent.putExtra("EXIT", true);
    if (getIntent().getBooleanExtra("EXIT", false)) {
     finish();
    }
    startActivity(intent);
    }

   }