I want to make a program where I can play the bass guitar

My graduation work was also on a guitar app, so it's nice to see you. You'll have to find the guitar sound source separately.

To accept the event when you stroke, instead of click-listener, I remember using a motion event for the touchlistener.

For the guitar, divide the smartphone screen into six equal parts and place each line If you implement a motion event that corresponds to each line and put in a playback event, It will.

You can use Soundpool or Midiapi to play the song. You can add a vibration event along with the music playing.

If you look carefully for guitars, there are some open sources, so please refer to them.

You can also define the button as OnTouchListener.

It's a basic framework.

btn_Touch.setOnTouchListener(new View.OnTouchListener() {

@Override

public boolean onTouch(View v, MotionEvent event) {

    switch (event.getAction()) {

    case MotionEvent.ACTION_DOWN:
                    // When you click
        break;            

    case MotionEvent.ACTION_MOVE:
                // Drag, move
        break;

    case MotionEvent.ACTION_UP:
              // When you hit your hand
        break;

    default:

        break;
    }

    return false;
}

});