Once, I was playing with a number of Chinese tablets and trying different ROMs on them as they are technically the same hardware I've had some problems getting the hard buttons to work though, so I wrote this application to detect key events and print them out.
The app was scanned for viruses and it was found 100% secure. Alexandros Schillings is the developer of KeyEvent Display that can be found in the Tools category. Over 10K users set up this application and its most recent update was released on Feb 21, 2012.
The average rating for the app is 4.4 on Google Play. You are able to download the .apk setup package of KeyEvent Display 0.0.4 free of charge and read users' reviews on Droid Informer. This application size doesn't exceed 53 KB.