public abstract class BaseActivity extends UniversiActivity {

    // Below are listed some of methods that are available in context of this activity.

    // FRAGMENTS

    // void setFragmentController(FragmentController);
    // void setFragmentFactory(FragmentFactory);

    // DIALOGS

    // boolean setDialogController(DialogController)
    // void setDialogFactory(DialogFactory)
    // void setDialogXmlFactory(@XmlRes int)
    // boolean showDialogWithId(int, DialogOptions)
    // boolean dismissDialogWithId(int)
    // boolean showXmlDialog(@XmlRes int, DialogOptions)
    // boolean dismissXmlDialog(@XmlRes)

    // PERMISSIONS

    // int checkSelfPermission(String)
    // boolean shouldShowRequestPermissionRationale(String)
    // void supportRequestPermissions(String[], int)

    // NETWORK CONNECTION

    // boolean isActiveNetworkConnected()

    // BASE IMPLEMENTATION

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // Specify default container id for default FragmentController.
        // The view container will be used to host root views of fragments shown via this controller.
        getFragmentController().setViewContainerId(R.id.container);
        super.onCreate(savedInstanceState);
    }

    @Override
    protected void onBindViews() {
        super.onBindViews();
        Butterknife.bind(this)
    }
}

@ContentView(R.layout.activity_sample)
public final class SampleActivity extends BaseActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Set navigational transition used to finish this activity whenever its
        // finishWithNavigationalTransition() is called.
        setNavigationalTransition(SampleNavigationalTransition.get());

        // Attach fragment factory providing Fragment instances for activity's default FragmentController.
        setFragmentFactory(new SampleFragments());
        // ... show initial fragment
        if (savedInstanceState == null) {
            getFragmentController().newRequest(SampleFragments.SAMPLE).immediate(true).execute();
        }

        // Attach dialog factory providing DialogFragment instances for activity's default DialogController.
        setDialogFactory(new SampleDialogs());
        // ... or
        setDialogXmlFactory(R.xml.sample_dialogs);
    }

    @OnClick(R.id.button)
    public void onButtonClick(@NonNull View button) {
        // ... show sample dialog by its corresponding id specified in R.xml.sample_dialogs Xml file
        // In case of SampleDialogs we would use some constant ID specified in such factory.
        showDialogWithId(R.id.sample_dialog);
        // ... dismiss the dialog later
        dismissDialogWithId(R.id.sample_dialog);
    }

    // ... this activity simply have access to all useful methods provided by UniversiActivity ...
}