触摸涟漪效应在这里超越了界限.这是怎么做到的？
编辑：我只能在5.0上工作.
解决方法
我从几个地方读到：
If you want to apply the standard ripple effect on Android 5.0: API 21
or more,which should not be limited to your view (unbounded ripple),
just apply to your View background :
android:background="?android:attr/selectableItemBackgroundBorderless"
