EnhanceAsPresenter.md

Enhance as Presenter

Enhance Activities

Since MVP Plugin v1.0.0

To start using MVP features in a activity, annotate it with @EMvpPresenter:

@EActivity
@EMvpPresenter
public class MyActivity extends Activity {

}

Enhance Fragments

Since MVP Plugin v1.0.0

To start using MVP features in a fragment, annotate it with @EMvpPresenter:

@EFragment
@EMvpPresenter
public class MyFragment extends Fragment {

}

Inject Views

You can inject new instance of a bean annotated with @EMvpView. View can already be used in @AfterView annotation.

@MvpView
MyView myView;

@AfterView
void onAfterViews() {
    myView.showSomething();
}

Start other Activities

Since MVP Plugin v1.0.0

You can inject an instance of an activity builder to launch activities without static method access.

@MvpActivity
ActivityLauncher<AnyActivity_.IntentBuilder_> anyActivity;

void onEvent() {
    anyActivity.intent(this).start();
}    

You can use all common builder functions from origin AndroidAnnotations to build intent and start activity with it.

Inject Fragments (other Presenters)

Since MVP Plugin v1.0.0

You can inject new instance of a fragment annotated with @EMvpPresenter. If you have declared your fragments in your layouts then AndroidAnnotations provide similar functionality with annotations like @FragmentById (TODO link).

Origin AndroidAnnotations doesn't provide annotations to inject new fragment instances. Mostly because creating new fragment instance needs extra logic sometime e.g. setting some initial values. But often it is enough to just build it, so we can show it anytime if we want.

@MvpView
MyView myView;

@MvpFragment
AnyFragment anyFragment;

@AfterViews
void initView() {
    myView.showFragment(mainFragment);
}

Example view for showing fragments:

interface Callback {
    FragmentManager getSupportFragmentManager();
}

@ViewById(R.id.container)
FrameLayout container;

void showFragment(Fragment fragment) {
    callback.getSupportFragmentManager().beginTransaction().add(container.getId(), fragment, null).commit();
    callback.getSupportFragmentManager().executePendingTransactions();
}
    

Inject parent Presenter

Since MVP Plugin v1.0.0

With @MvpCallback you can automatically let inject the back reference to parent presenter instance.

interface Callback {
    void onChildEvent();
}

@MvpCallback
Callback callback;

void onEvent() {
    callback.onChildEvent();
}