Android: Image over image

I have a video thumbnail and when you click on it, the video starts playing in the YouTube player.

This works, but It's not clear that you have to click on the thumbnail to play, therefore, I want to draw a play button image over the thumbnail in the bottom right corner. How would I go about this?

I currently have the thumbnail in a Drawable object and the play button in my drawable resource directory.

I tried stuff with bitmaps and canvas but it's quite hard and I don't know if this is the way to go.