图片做按钮

1. ImageButton btn = (ImageButton)findViewById(R.id.imageButton1);          
2. btn.setOnTouchListener(new View.OnTouchListener(){            
3.     public boolean onTouch(View v, MotionEvent event) {               
4.             if(event.getAction() == MotionEvent.ACTION_DOWN){       
5.                //重新设置按下时的背景图片  
6.                ((ImageButton)v).setImageDrawable(getResources().getDrawable(R.drawable.android_btn_pressed));                              
7.             }else if(event.getAction() == MotionEvent.ACTION_UP){       
8.                 //再修改为抬起时的正常图片  
9.                 ((ImageButton)v).setImageDrawable(getResources().getDrawable(R.drawable.android_btn));     
10.             }  
11.             return false;       
12.     }       
13. });