Hàm - Hàm sự kiện chạm vào button

// sự kiện chạm cho button    

    public static void SuKienChamButton(Button btn,final Integer beginResource ,final Integer Resource) {
        btn.setOnTouchListener(new View.OnTouchListener() {
            @Override            

            public boolean onTouch(View v, MotionEvent event) {
                //imvBackActionBar.setBackgroundColor(Color.parseColor("#FF6E9BF5"));                

                 switch (event.getAction()) {
                    case MotionEvent.ACTION_DOWN: {
                        Button bt = (Button) v;
                        //overlay is black with transparency of 0x77 (119)                       

                        bt.setBackgroundResource(beginResource);
                        bt.invalidate();
                        break;
                    }
                    case MotionEvent.ACTION_UP:
                    case MotionEvent.ACTION_CANCEL: {
                        Button bt = (Button) v;
                        //clear the overlay                        

                        bt.setBackgroundResource(Resource);
                        bt.invalidate();
                        break;
                    }
                }
                return false;
            }
        });
    }