Android编程动态按钮实现方法

btn3 = (ImageButton) findViewById(R.id.ImageButton03);
btn3.setOnTouchListener(touchListener3);
View.OnTouchListener touchListener = new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
ImageButton imageBtn = (ImageButton) v;
if(event.getAction() == MotionEvent.ACTION_DOWN){
//更改为按下时的背景图片
imageBtn .setImageResource(R.drawable.pressed);
}else if(event.getAction() == MotionEvent.ACTION_UP){
//改为抬起时的图片
imageBtn .setImageResource(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>

<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>