how to stop media player in android

when open my apps gallery is running and set current gallery image to imageview and playing one audio file through media player if i come out of my aps even it is running

i tried to give mp.stop() and mp.release() in destroy method bu开发者_StackOverflow中文版t it wont work for me please suggest me

Thanks in Advance

aSwan

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i have updated my answer! to avoid the "-1´s" =P

   if (mp != null) {
        mp.stop();  // Stop play
        mp.release(); 
        mp = null; // set Media Player to null
   }