How to always start from a startup activity on Android?

Question

There are three different cases:

1) A user launches an app, navigates in it, pressed home and click on the app icon again to launch our app again.

2) A user

Answer 1

1) define a public static normalPause = true variable in a Class.

2) in onPause method of all of your activities set it false (I am worry. We might not be in a normal pause)

2) in onCreate method of all of your activities set it true (Do not worry. We are in a normal pause)

3) in onResume of all of your Activities:

if(!Utilities.normalPause)
{
    this.finish()
}

Enjoy!