BottomNavigationView设置下方按键点击背景颜色

1.创建ButtonNavigationView的xml资源文件

?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="#FE4D64" android:state_checked="true" />
    <item android:color="@color/black_overlay" android:state_checked="false" />
</selector>

2.在布局中引用即可

 

<android.support.design.widget.BottomNavigationView
    android:id="@+id/navigation"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?android:attr/windowBackground"
    app:itemIconTint="@drawable/navigation_item"
    app:itemTextColor="@drawable/navigation_item"
    app:menu="@menu/navigation" />