App completely restarting when launched by icon press in launcher

Question

I\'m in the process of trying to make a release build of my first android app to send to a few testers. However, I ran into a problem with it. When you exit the app and then

Answer 1

 // To prevent launching another instance of app on clicking app icon 
        if (!isTaskRoot()
                && getIntent().hasCategory(Intent.CATEGORY_LAUNCHER)
                && getIntent().getAction() != null
                && getIntent().getAction().equals(Intent.ACTION_MAIN)) {

            finish();
            return;
        }

write the above code in your launcher activity before calling setContentView. This will solve the problem