方便以后复制 (直接复制在一个资源文件中就行了) ,就是偷懒 ==
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true">
<shape
android:shape="rectangle">
<solid android:color="#50ff4200"/>
<corners android:radius="5dp"/>
<padding
android:bottom="5dp"
android:left="15dp"
android:right="15dp"
android:top="5dp">
</padding>
</shape>
</item>
<item android:state_pressed="false">
<shape
android:shape="rectangle">
<solid android:color="#ff4200"/>
<corners android:radius="5dp"/>
<padding
android:bottom="5dp"
android:left="15dp"
android:right="15dp"
android:top="5dp">
</padding>
</shape>
</item>
</selector>