overflow-menu.md

androidx 溢出菜单分析

溢出菜单按钮：OverflowMenuButton

appcompat/appcompat/src/main/java/androidx/appcompat/widget/ActionMenuPresenter.java

溢出菜单：

appcompat/appcompat/src/main/java/androidx/appcompat/widget/MenuPopupWindow.java

    android:background="?selectableItemBackground"
    android:clickable="true"
    android:focusable="true"