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

   1 <?xml version="1.0" encoding="utf-8"?>
   2 <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   3     xmlns:app="http://schemas.android.com/apk/res-auto"
   4     xmlns:tools="http://schemas.android.com/tools"
   5     android:layout_width="match_parent"
   6     android:layout_height="match_parent"
   7     tools:context=".MainActivity">
   8
   9     <Button
  10         android:id="@+id/button"
  11         android:layout_width="wrap_content"
  12         android:layout_height="wrap_content"
  13         android:layout_marginBottom="18dp"
  14         android:layout_marginEnd="149dp"
  15         android:layout_marginStart="147dp"
  16         android:text="@string/btn"
  17         app:layout_constraintBottom_toBottomOf="parent"
  18         app:layout_constraintEnd_toEndOf="parent"
  19         app:layout_constraintStart_toStartOf="parent" />
  20
  21     <SurfaceView
  22         android:id="@+id/surfaceView"
  23         android:layout_width="335dp"
  24         android:layout_height="421dp"
  25         android:layout_marginEnd="5dp"
  26         android:layout_marginStart="5dp"
  27         android:layout_marginTop="10dp"
  28         app:layout_constraintEnd_toEndOf="parent"
  29         app:layout_constraintStart_toStartOf="parent"
  30         app:layout_constraintTop_toTopOf="parent" />
  31
  32 </android.support.constraint.ConstraintLayout>