Stop application from running in background?

How to stop application from running in background in android? I want my application to start fresh everytime it loads. How to do it programatically.

How do I permanently stop apps running in the background Android?

Here's how: Go to Settings > General > Background App Refresh. From the list of apps shown, use the toggle to turn Background App Refresh on or off for each app.

Override onStop method of your activity:

@Override
public void onStop(){
    super.onStop();
    finish();
}

But I think it's a bad idea to restart your app each time. It's better to override onStart method, and handle "restart" here.

Actually, your app doesn't "run" in background. Android OS keeps it in memory, or saves state of your activity to device (and then you can load it, using savedInstanceState param in onCreate method).