I asked pokerstars support but they haven't got back to me and last time I had a problem they where very vauge with there answer if you havent got a helpful thing to say why comment I thought it would be alot mote help getting an answer from someone who has had the same problem it that ok with you
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You might be lucky and find someone here that has had the same problem but I think that you are more likely to find a solution on a software forum. You say that PokerStars are a bit vague so have a look round the page that you get the download from and see if you can see the name of the people that wrote the software (in case it isn't Pokerstars themselves). If you can see one try googling their name to find their site and see if they have a support forum.
If not, you could try one of the more general Android support forums, or a Nexus one if it exists, and ask your question there. (Put in the image as you did here as that is likely to help someone identify the problem).
Good luck.
Just found a Nexus 4 forum here (
http://www.nexus4forum.com/forum/nexus-4-support-forum/) I have no idea if it is any good but worth a try.