After injection

@Enhanced
public class MyClass {

  @SystemService
  NotificationManager notificationManager;

  @Inject
  MyOtherClass dependency;

  public MyClass() {
    // notificationManager and dependency are null
  }

  @AfterInject
  public void doSomethingAfterInjection() {
    // notificationManager and dependency are set
  }

}

@EActivity
public class MyActivity extends Activity {

  @SystemService
  NotificationManager notificationManager;

  @Inject
  MyOtherClass dependency;

  public MyActivity() {
    // notificationManager and dependency are null
  }

  @AfterInject
  public void doSomethingAfterInjection() {
    // notificationManager and dependency are set
  }

}