Dagger 2-在运行时选择依赖项

Question

我需要在运行时选择LocationProvider的正确实现。都 GoogleLocationService和AndroidLocationService有它们自己的依存关系。

public interface LocationProvider{
   Observable<Location> getLocationProvider(Looper looper);
}

@ActivityScope
public class GoogleLocationService implements LocationProvider{

   ...

   @Inject
   public GoogleLocationService (...){
   }

}

@ActivityScope
public class AndroidLocationService implements LocationProvider{

   ...

   @Inject
   public AndroidLocationService (...){
   }

}

@ActivityScope   
public class LocationControl{

   LocationProvider locationProvider;

   @Inject
   public LocationControl(...){
      ...
   }

   public void start(){
      if(isGooglePlayServiceAvailable){
         locationProvider = new GoogleLocationService(...);
      } else {
         locationProvider = new AndroidLocationService(...);
      }
   }
}

使用Dagger 2满足这些依赖性的最佳方法是什么？ 我应该使用懒惰注射吗？

@ActivityScope   
public class LocationControl{

    @Inject
    Lazy<AndroidLocationService> androidlocationService;
    @Inject
    Lazy<GoogleLocationService> googlelocationService;

    LocationProvider locationProvider;

    @Inject
    public LocationControl(...){
       ...
    }

    public void start(){
       if(isGooglePlayServiceAvailable){
          locationProvider = googlelocationService.get();
       } else {
          locationProvider = androidLocationService.get();
       }
    }
 }

还是工厂？

@ActivityScope   
public class LocationControl{

   private final LocationProviderFactory locationProviderFactory;

   LocationProvider locationProvider;

   @Inject
   public LocationControl(LocationProviderFactory locationProviderFactory){
      this.locationProviderFactory = locationProviderFactory;
   }

   public void start(){
      if(isGooglePlayServiceAvailable){
         locationProvider = locationProviderFactory.getLocationProvider(google);
      } else {
         locationProvider = locationProviderFactory.getLocationProvider(android);
      }
   }
}

@ActivityScope
public class LocationProviderFactory{

   private final GoogleLocationService GoogleLocationService;
   private final AndroidLocationService AndroidLocationService;

   @Inject
   public LocationProviderFactory(GoogleLocationService googleLocationService, AndroidLocationService androidLocationService){
      this.googleLocationService = googleLocationService;
      this.androidLocationService = androidLocationService;
   }

   public LocationProvider getLocationProvider(condition){
       if(condition){
          return googleLocationService;
       } else {
          return androidLocationService;
       }
   }
}

或者也许有更好的方法？