如果您不想使用依赖注入，请考虑这个问题。
这是一个最小的例子，留下了很多东西有待改进！
在这个例子中，我们不会传递 Context 因为这可能会导致内存泄漏（如果处理不彻底），但会造成 FusedLocationProviderClient 并将其传递给viewmodel和存储库。
注意：避免传递与android相关的东西，比如 Context , View 的视图模型和较低的层。它将使测试和重构变得更容易，因为您对android的依赖更少。
在活动中，您将获得viewmodel并创建 FusedLocationProviderClient :

public class YourActivity : Activity() {

  private FusedLocationProviderClient locationProvider = LocationServices.getFusedLocationProviderClient(this.applicationContext);

  // Either you pass FusedLocationProviderClient via constructor to the ViewModel, or via a setter later
  private YourViewModel viewModel = // ...       

  override void onCreate() {
     super.onCreate();
     // if you wanna set the locationProvider via setter
     viewModel.setLocationProvider(locationProvider); // this should not leak when the activity finishes as there is no reference to the Activity or its view 
  }
}

然后在viewmodel中 locationProvider 通过构造器或设置器：

public class YourViewModel extends ViewModel {

  // You can either create a new LocationRepository in the viewModel,
  // or you can pass an instance via Constructor (which I recommend for better testability)
  // or you pass it via a setter
  private LocationRepository locationRepository;

  public YourViewModel(FusedLocationProviderClient locationProvider) {
    locationRepository = new LocationRepository(locationProvider);
  }

  // alternatively using a setter
  public void setFusedLocationProviderClient(FusedLocationProviderClient locationProvider) {
    locationRepository = new LocationRepository(locationProvider);
  }

  // this function calls your repository
  public void foo() {
    // ensure LocationRepository is initialized or you will get a Nullpointer here,
    // or check if (locationRepository != null) { ... } before accessing it
    localRepository.test()
  }

  @Override
  public void onCleared() {
    // do cleanup
    // stop ongoing work (in your repository)
    // unregister listeners (in your repository)
  } 
}

public class LocationRepository {

  private FusedLocationProviderClient locationProvider;

  public LocationRepository(FusedLocationProviderClient locationProvider) {
    this.locationProvider = locationProvider;
  }

  public void test() {
    // ... now you can use FusedLocationProviderClient (without the need of having a context
  }