Sound not stopped if start “on create” void

Question

public class Form1 extends ActionBarActivity { private MediaPlayer mp; Context context; ... setContentView(R.layout.activity_form1);

    if (mp==null) {
        context = this;
        mp = MediaPlayer.create(context, R.drawable.mainmenus);
        mp.setLooping(true);
        mp.start();
    };
.... public void startbook(View view) {

      mp.pause();
      mp.stop();
      mp.reset();
      mp.release();
      mp = null;

    Intent intent = new Intent(Form1.this, Form2.class);
    startActivity(intent);
}

If press button "startbook", sound not stop.

Answer 1

正确代码正确：public static MediaPlayer mp = null