title: Start an activity when a particular text is entered in the application
body: <p>Here is what i need:
  I need to start an activity when a particular password is entered or a button is long pressed in the home screen of my app.
  I have a registration page where the user can register..
  but suppose it is the admin who is using the page he may enter a particular sequence of text and it will take him to that screen..
  please not i don't provide any text box for the admin to enter the password..there should be some listener in background which waits for this particular event..
  can you guide me on how this can be implemented?</p>