up

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

@@ -1,13 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.coordinatorlayout.widget.CoordinatorLayout
+<androidx.constraintlayout.widget.ConstraintLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
-        xmlns:tools="http://schemas.android.com/tools"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        tools:context=".ui.main.MainActivity">
-
-    <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         app:layout_behavior="@string/appbar_scrolling_view_behavior">
@@ -29,4 +23,3 @@
 
 </androidx.constraintlayout.widget.ConstraintLayout>
 
-</androidx.coordinatorlayout.widget.CoordinatorLayout>