gistfile1.txt

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        browserFragment = getBrowserFragment();
        if (browserFragment == null) {
            browserFragment = new BrowserFragment();
            getSupportFragmentManager().beginTransaction()
                    .replace(R.id.container, browserFragment)
                    .commit();
        }
        browserFragment.loadUrl("http://google.com");
    }

    private BrowserFragment getBrowserFragment() {
        Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.container);
        if (fragment != null && BrowserFragment.class.getName().equals(fragment.getClass().getName())) {
            return (BrowserFragment) fragment;
        }
        return null;
    }