Android: Image over image

Use Relative or FrameLayout:

   <RelativeLayout 
          android:layout_width="wrap_content" 
          android:layout_height="wrap_content">

        <ImageView 
               android:layout_width="wrap_content" 
               android:layout_height="wrap_content"
               android:src="@drawable/thumbnail"/>
        <ImageView  
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:src="@drawable/play" 
               android:layout_alignParentBottom="true"
               android:layout_alignParentRight="true"/>

    </RelativeLayout>

or

<FrameLayout
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content">

      <ImageView 
           android:layout_width="wrap_content" 
           android:layout_height="wrap_content"
           android:src="@drawable/thumbnail"/>

      <ImageView 
           android:layout_width="wrap_content" 
           android:layout_height="wrap_content" 
           android:src="@drawable/play" 
           android:layout_gravity="bottom|right"/>

</FrameLayout>

What about using a FrameLayout or a RelativeLayout to stack the views..

Here follows some psaudo code:

<FrameLayout
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
>
<com.yourpackage.VideoPlayer
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
></VideoPlayer>

<!-- Adjust the layout position of the button with gravity, margins etc...  -->
<Button
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_gravity="bottom"
 android:text="Play"
/>

</FrameLayout>