public class MainActivity extends AppCompatActivity {
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    MediaPlayer mp = MediaPlayer.create(this, R.raw.music);
    Button ImageButton = (Button) findViewById(R.id.button);
    ImageButton.setOnTouchListener(new View.OnTouchListener() {
        @Override

        public boolean onTouch(View v, MotionEvent event) {

            switch(event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    mp.start;

                    break;
                case MotionEvent.ACTION_UP:
                    mp.stop;

                    break;
            }
            return false;
        }
    });
}