RootBeer example

MainActivity.java

@Override
    protected void onCreate(Bundle savedInstanceState) {
        SplashScreen.show(this);

        if (!BuildConfig.DEBUG && !BuildConfig.SKIP_ROOT_CHECK) {
            RootBeer rootBeer = new RootBeer(this);
            if (rootBeer.isRootedWithoutBusyBoxCheck()) { // isRooted has false positives (OnePlus devices and MotoE)
                AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setMessage("You cannot use this app on a rooted device.")
                .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        exitApp();
                    }
                })
                .setOnDismissListener(new DialogInterface.OnDismissListener() {
                    @Override
                    public void onDismiss(DialogInterface dialog) {
                        exitApp();
                    }
                })
                .show();
            }
        }

        super.onCreate(savedInstanceState);
    }

    private void exitApp()
    {
        if (Build.VERSION.SDK_INT >= 21) {
           finishAndRemoveTask();
        } else {
           finish();
        }

        System.exit(0);
    }