Android navigate back to Application from Android Settings

Extending upon Ufkoku's answer, I used a periodic check on the status of the permission. To get the user back, I used startActivityForResult and finishActivity.

Sample Code : I used this for the "USAGE_ACCESS_SETTINGS".

var intent = Intent("android.settings.USAGE_ACCESS_SETTINGS")
intent.data = Uri.fromParts("package", "com.example.app", null)
startActivityForResult(intent,101)

var timer = Timer(true)
timer.scheduleAtFixedRate(object: TimerTask(){
    override fun run(){
        if(checkUsageAccessPermission()){ // checkUsageAccessPermission() is a helper function
            finishActivity(101)
            cancel()                    
        }
    }
}, 0, 1000)

Ok, so after trying about a millions things, I have come up with 3 different ways to improve my problem.

1) Was provided by @CommonsWare, by removing the FLAG_ACTIVITY_NEW_TASK, it prevented an inconsistent number of back presses needed, and means every time the user would only have to press back twice.

2) Upon further research into the flags, I found that using three combined:

Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
                    intent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
                    startActivity(intent);

reduced the number of back presses required to 1 single back press. This is simple and reasonable user friendly.

3) Using a handler to continuously check for the required permission after the settings intent has fired. This seems a like a bit of a hack, and I can't believe there is not a better way to do this, but it works exactly as it works when using a Google App. Ie, as soon as you switch the toggle to on, it exits the Android Settings page, and returns to your application, where you left off. I am using:

Handler handler = new Handler();

Runnable checkSettingOn = new Runnable() {

    @Override
    //@TargetApi(23)
    public void run() {
        Log.d(TAG, "run: 1");
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
            Log.d(TAG, "run: 2");
            return;
        }
        if (isAccessGranted()) {
            Log.d(TAG, "run: 3");
            //You have the permission, re-launch MainActivity
            Intent i = new Intent(MainActivity.this, MainActivity.class);
            Log.d(TAG, "run: 4");
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
            startActivity(i);
            return;
        }
        handler.postDelayed(this, 200);
    }
};

Then when you fire the intent to get to the Android settings page, just be sure to start the handler:

handler.postDelayed(checkSettingOn, 1000);

Hope this helps someone else with a similar issue.

After you have started Settings activity you can run periodical task, that is invoked every, for example 500ms, and checks if permission is granted.
Mark your setup activity with flag singleTask/singleInstance, and start it, if permission is granted. Existing instance of activity will be moved to top.

I did this for notifications access permission.