Ripple水波纹

#Material Design使用
ripple水波纹
BottomNavigationView
##1.Ripple水波纹效果 爸爸原文链接

继承关系

java.lang.Object

↳ android.graphics.drawable.Drawable

↳ android.graphics.drawable.LayerDrawable

↳ android.graphics.drawable.RippleDrawable

Added in API level 21(android 5.0)

ripple配合selector使用可以创造出更加多变的点击反馈效果

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="#721632">
<item android:state_pressed="false">
<shape android:shape="rectangle">
<solid android:color="@color/white"/>
</shape>
</item>
</ripple>