1<?xml version="1.0" encoding="utf-8"?>
2<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3    android:orientation="vertical"
4    android:layout_width="match_parent"
5    android:layout_height="match_parent">
6
7    <SurfaceView android:id="@+id/surface"
8        android:layout_width="wrap_content"
9        android:layout_height="wrap_content"
10        android:layout_gravity="center">
11    </SurfaceView>
12  
13</LinearLayout>