data-access-app-block

I have to develop an app locker for Android where the user can block apps and other users can not access these apps without an access key. I have installed an app but I don't know how to lock this app. Please suggest me something. This is not how stack overflow works. You can not ask a complete solution without even trying anything. For the most basic version of your app, you need to perform three functions. Get a list of all the installed apps on device and show them in a ListView with check box. If the user checks any app, add the app to a different list say BlockedAppsList(which will be the