Jacek Kwiecień
Written by Jacek Kwiecień
Android Developer
Published May 28, 2015

Killing an Android app from anywhere

Ever wondered what would be a simple solution to killing an Android application? That’s right – there is none, Google has its reasons for that. As usually, there is a hack…

Right now every decent Android developer probably thinks I lost my mind. That’s true: there is no need for exit buttons in our Android apps. This behaviour is just as Google wants it to be. And that’s why there is no easy way to kill the app from the activity which is not the last standing.

As usually, there is a workarround. Please do not use it to implement close buttons in your apps.
This is something for special occasions. I use this method to kill an app, if a user decides to do not pay for an expired subscription.

Instruction for an app kill

It’s fairly simple, if you understand Android activities flow.

  • To kill the app you basically need to finish() all the activities that the app had opened before.
  • If we finish the first activity that our app opened on the startup, the app closes.
  • To do this from any Activity we need to open our first Activity with the flag FLAG_ACTIVITY_CLEAR_TOP and some extra that will inform our first Activity to finish() itself on the startup.

Here is how the killing method would look like:

This is how the first Activity kills itself when needed.

That’s it, the app should close and get us to the home screen.

Here is the github repository with the sample app demonstrating this technique.

Cheers!

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Written by Jacek Kwiecień
Android Developer
Published May 28, 2015