è¿éæ两个æ§ä»¶ï¼ä¸ä¸ªæ¯èæ¯çViewï¼ä¸ä¸ªæ¯å¾çæé®ImageButtonï¼å¯¹ImageButtonæ·»å setOnTouchListenerçå¬å¨ï¼å¨éé¢å¤æï¼
if(event.getAction() == MotionEvent.ACTION_DOWN){
bg.setBackgroundResource(R.drawable.campus);
}
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