版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/wuzhong8809/article/details/78387865
android:background="?android:attr/selectableItemBackground"波纹有边界
android:background="?android:attr/selectableItemBackgroundBorderless"
android:background="?android:attr/selectableItemBackground"波纹有边界
android:background="?android:attr/selectableItemBackgroundBorderless"