<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
	android:id="@+id/launcher_activity_root"
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	android:padding="8dp">
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
	android:id="@+id/launcher_activity_root"
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	android:padding="8dp">
</LinearLayout>
Change root element to LinearLayout
Change root element to LinearLayout
