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"
build.gradle 調整 buildscript { repositories { maven{ url 'http://maven.aliyun.com/nexus/content/grou