BuildingModel.java

public class BuildingModel {
  private String mName;
  private String mAddress;
  
  public BuildingModel(String name, String address) {
    mName = name;
    mAddress = address;
  }
  
  public String getName() {
    return mName;
  }
  
  public String getAddress() {
    return mAddress;
  }
}

SupportLoaderTestCaseExampleLoader.java

public class BuildingLoader extends Loader<ArrayList<BuildingModel>> {
  private final String[] mBuildingNames;
  private ArrayList<BuildingModel> mBuildingArrayList;
  
  public BuildingLoader(Context context, String[] buildingNames) {
    super(context);
    mBuildingNames = buildingNames;
  }
  
  @Override
    protected void onStartLoading() {
        if (mBuildingArrayList != null) {
            deliverResult(mBuildingArrayList);
        } else {
            forceLoad();
        }

    }

    @Override
    protected void onForceLoad() {
        if (mBuildingArrayList != null) {
            deliverResult(mBuildingArrayList);
        }

        loadInBackground();
    }
    
    @Override
    protected void onReset() {
        mBuildingArrayList = null;
    }

    private void loadInBackground() {
      for (int x = 0; x < mBuildingNames.length; x++) {
        onGetDataForBuilding(mBuildingNames[x]);
      }
      
      deliverResult(mBuildingArrayList);
    }
    
    @VisibleForTesting
    protected void onGetDataForBuilding(String buildingName) {
      // Blocking call to a thirdparty REST API that accepts a building name
      // and returns the building address.
      BuildingModel resultBuilding = null;
      
      onSuccess(resultBuilding);
    }
    
    public void onSuccess(final BuildingModel buildingModel) {
      if (mBuildingArrayList == null) {
            mBuildingArrayList = new ArrayList<>();
        }
        mBuildingArrayList.add(buildingModel);
    }
}