CTB 4-4

MainActivity.java

    public void changePos() {
        if (action_flg) {
            boxY -= 20;

        } else {
            boxY += 20;
        }
        box.setY(boxY);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            action_flg = true;

        } else if (event.getAction() == MotionEvent.ACTION_UP) {
            action_flg = false;

        }
        return true;
    }
}