samples/ApiDemos/res/layout/mediaplayer_1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <Button android:id="@+id/localvideo"
        android:layout_height="wrap_content"
        android:layout_width="match_parent" 
        android:text="@string/local_video" 
    />
    
    <Button android:id="@+id/streamvideo"
        android:layout_height="wrap_content"
        android:layout_width="match_parent" 
        android:text="@string/stream_video" 
    />
    
    <Button android:id="@+id/localaudio"
        android:layout_height="wrap_content"
        android:layout_width="match_parent" 
        android:text="@string/local_audio" 
    />
    
    <Button android:id="@+id/resourcesaudio"
        android:layout_height="wrap_content"
        android:layout_width="match_parent" 
        android:text="@string/res_audio" 
    />
    
</LinearLayout>