@SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setTheme(R.style.Theme_ColorScheme_Red);
        setContentView(R.layout.activity_main);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            TypedValue val = new TypedValue();
            getTheme().resolveAttribute(R.attr.designBase700, val, true);

            Window window = getWindow();
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            window.setStatusBarColor(val.data);
        }

        /** skip those lines because they're not important **/

        if (savedInstanceState == null) {
            MainFragment frag = new MainFragment();
            Bundle bundle = new Bundle();
            bundle.putBoolean(MainFragment.BUNDLE_ARG_FIRST_START, true);
            frag.setArguments(bundle);
            getSupportFragmentManager().beginTransaction().add(R.id.container, frag, MainFragment.TAG).commit();
        }
    }