Use an edge-to-edge layout for Android Q

app/src/main/res/layout/activity_app_view.xml

@@ -2,10 +2,6 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:paddingBottom="@dimen/activity_vertical_margin"
-    android:paddingLeft="@dimen/activity_horizontal_margin"
-    android:paddingRight="@dimen/activity_horizontal_margin"
-    android:paddingTop="@dimen/activity_vertical_margin"
     tools:context=".AppView" >
 
     <FrameLayout
@@ -27,8 +23,6 @@
         android:layout_centerHorizontal="true"
         android:layout_alignParentTop="true"
         android:gravity="center"
-        android:paddingTop="0dp"
-        android:paddingBottom="10dp"
         android:textSize="28sp"/>
 
 </RelativeLayout>