Android - VideoView shows thumbnail of previous video
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I made a video player based on VideoView widget. The videos are loaded from internet.  
Everything works fine, except one little thing.  

I open a video, and while it is playing I click the "Next" button to advance to the next video. And the issue is that while the next video is loading, it shows me the thumbnail of previous video. 
I would like to not display any thumbnail, or at least the thumbnail of currently loading video, but deffinetly NOT the thumbnail of previous video.

So, is there a method like "flush()", or something like this to clear the videovideo and not show the thumbn. of previous video? Or at least why does it happen?