Android app that plays video in a loop

This app will most likely be used on 7 inch android tablets running ICS.I need the app to play a video (mp4, avi, mpg) in a loop that the user sets up. Then allows the user to create an icon on the android desktop for that specific video. Once the icon is pressed from the desktop the video will play in the continous loop that the user setup. If anyone tries to disrupt the video, the program will then ask for a passcode to exit the video. I need there to be some sort of locking feature in this app. I understand about pressing the home key and getting back to the desktop. If home key is pressed it needs to act like the tablet was sleeping and ask for a code. Worse case have it link up with the screen lock built into the android OS. Also, before app is installed on any device a code needs to provided for app to install. If you want you can create a database of 100's of keys at least 10 characters using case sensitive letters and numbers. Worse case if someone gets smart they may attempt to get the app off the tablet and they won't have the code. Also make sure once the code is in it won't be easy to find . Also I would like three attempts of a code and then the software either uninstalls itself or restarts the tablet. This might be overkill so we can discuss. This will insure me that no one can use the program besides myself. Thanks!!