处理何时按下按钮，何时松开按钮

imageButton.setOnTouchListener(new OnTouchListener(){    

          @Override   

          public boolean onTouch(View v, MotionEvent event) {    

             if(event.getAction() == MotionEvent.ACTION_DOWN){    

                 //按下                                            

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

                 //抬起                                          

             }    

                   return false;    

          }    

       });