android的Material Design点击涟漪效果

<span style="font-size:18px;"><strong><?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="https://schemas.android.com/apk/res/android"
    xmlns:tools="https://schemas.android.com/tools"
    android:color="@color/orange"//点击效果
    tools:targetApi="lollipop">
    <item android:drawable="@color/white"></item>//背景色
</ripple></strong></span><span style="font-size:18px;"><strong><?xml ver