There is a new version of the arduino controller android app available in google play. This app will cost you a beer for my effort but it has a some new features and it will let you costumize it so it looks specialy disigned for your arduino project.
Changes made to this version:
-The size of the webview automaticaly ajusts to the content
-Improved use of resources and battery usage
-URL and IP support (eg. www.mysite.com or 143.34.175.45)
-Custom activity name (the name you see on the main screen of the app)
-More buttons (32!)
-Buttons are hidden when you dont use them
-Strings can contain all alpha numeric symbols
Arduino Controller Pro can be found in google play.
And the example sketch on dropbox.