with Relative Layout and test

Author: cs-joy

FaceDetection/app/src/main/res/drawable/friends.jpg

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout 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"
@@ -8,23 +8,21 @@
 
     <ImageView
         android:id="@+id/imgVO"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="95dp"
+        android:layout_width="279dp"
+        android:layout_height="416dp"
+        android:src="@drawable/friends"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        tools:srcCompat="@tools:sample/avatars" />
+        android:layout_centerHorizontal="true"/>
 
     <Button
         android:id="@+id/btnDetect"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginBottom="76dp"
         android:text="Detect"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="@+id/imgVO"
-        app:layout_constraintStart_toStartOf="@+id/imgVO"
-        app:layout_constraintTop_toBottomOf="@+id/imgVO" />
+        android:layout_centerHorizontal="true"
+        android:layout_below="@id/imgVO"/>
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+</RelativeLayout>