[Android实例] Android ImageButton动画效果

imageButton.setOnTouchListener(new OnTouchListener(){ 

@Override 

public boolean onTouch(View v, MotionEvent event) { 

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

//更改为按下时的背景图片 

v.setBackgroundResource(R.drawable.pressed); 

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

//改为抬起时的图片 

v.setBackgroundResource(R.drawable.released); 

} 

return false; 

} 

});

<?xml version="1.0" encoding="UTF-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
<item android:state_pressed="false" android:drawable="@drawable/button_add" /> 
<item android:state_pressed="true" android:drawable="@drawable/button_add_pressed" /> 
<item android:state_focused="true" android:drawable="@drawable/button_add_pressed" /> 
<item android:drawable="@drawable/button_add" /> 
</selector>

 这个文件放在drawable目录下面。命名为button_add_x.xml
       使用的时候:

<ImageButton 
android:id="@+id/ImageButton" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:background="#00000000" 
android:src="@drawable/button_add_x" > 
</ImageButton>