3:Float Button(像Aide一样的悬浮按钮)
<com.gc.materialdesign.views.ButtonFloat
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="24dp"
android:background="#1E88E5"
materialdesign:animate="true"
materialdesign:iconDrawable="@drawable(图片)" />