Dagger 2 Activity Injection

BaseActivity.java

/**
 * @author Fernando Franco Giráldez
 */
public abstract class BaseActivity<T> extends ComponentActivity {
    // ----------------------------------
    // ATTRIBUTES
    // ----------------------------------
    private T component;
    private ActivityComponent activityComponent;
    @Inject
    Foo foo

    // ----------------------------------
    // LIFE CYCLE
    // ----------------------------------
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        activityComponent = buildActivityComponent();
        component = buildComponent(activityComponent);
    }

    @Override
    public void onDestroy() {
        component = null;
        activityComponent = null
        super.onDestroy();
    }

    // ----------------------------------
    // INTERFACES IMPL
    // ----------------------------------
    protected abstract T buildComponent(ActivityComponent activityComponent);

    // ----------------------------------
    // PUBLIC API
    // ----------------------------------
    public T component() {
        return component;
    }
    // ----------------------------------
    // PRIVATE API
    // ----------------------------------
    private ActivityComponent buildActivityComponent() {
        return DaggerActivityComponent.builder()
                .applicationComponent(applicationComponent())
                .activityModule(new ActivityModule(this))
                .build();
    }

    private ApplicationComponent applicationComponent() {
        return ((MyApp) getApplication()).component();
    }
}

OtherActivity

/**
 * @author Fernando Franco Giráldez
 */
public class OtherActivity extends BaseActivity<OtherComponent> {
    // ----------------------------------
    // ATTRIBUTES
    // ----------------------------------
    @Inject
    Bar bar;

    // ----------------------------------
    // LIFECYCLE
    // ----------------------------------
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initialize();
        //other stuff
    }
    @Override
    protected OtherComponent buildComponent(final ActivityComponent activityComponent) {
        return DaggerOtherComponent.builder()
                .activityComponent(activityComponent)
                .build();
    }

    private void initialize() {
        component().inject(this);
    }
}

thx