Android 设置水波纹的点击效果 简单

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:color="#FF21272B"
tools:targetApi="lollipop">
<item>
<shape android:shape="rectangle">
<solid android:color="#FFFFFF" />
<corners android:radius="4dp" />
</shape>
</item>
</ripple>