MyApplication.java

public class MyApplication extends Application implements HasActivitySubcomponentBuilders {

    @Inject
    Map<Class<? extends Activity>, ActivityComponentBuilder> activityComponentBuilders;

    private AppComponent appComponent;

    public static HasActivitySubcomponentBuilders get(Context context) {
        return ((HasActivitySubcomponentBuilders) context.getApplicationContext());
    }

    @Override
    public void onCreate() {
        super.onCreate();
        appComponent = DaggerAppComponent.create();
        appComponent.inject(this);
    }

    @Override
    public ActivityComponentBuilder getActivityComponentBuilder(Class<? extends Activity> activityClass) {
        return activityComponentBuilders.get(activityClass);
    }
}