实现多层抽屉菜单，点击其中一项会动画打开该抽屉--第三方开源--MultiCardMenu

下载地址：https://github.com/wujingchao/MultiCardMenu

<net.wujingchao.android.view.MultiCardMenu
        xmlns:simple="http://schemas.android.com/apk/res-auto"
        android:id="@+id/multi_card_menu"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        simple:background_layout="@layout/background_view"
        simple:margin_top="50dp"
        simple:fade="true"
        simple:title_bar_height_display="20dp"
        simple:title_bar_height_no_display="60dp"
        simple:boundary="true"
        simple:move_distance_to_trigger="30dip"
        simple:animator_duration="300">

            ....(Your ChildViews)

   </net.wujingchao.android.view.MultiCardMenu>