旋转屏幕时如何使用装载程序

Question

我尝试使用Loaders而不是AsyncTask.I无法弄清楚如何在旋转屏幕时正确组织保存状态。我从Json收到信息并尝试创建列表。

public class FragmentWeatherTestApplication extends Fragment
        implements LoaderManager.LoaderCallbacks<List<WeatherItem>> {
@Override
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    getLoaderManager().initLoader(0,null,this).forceLoad();
}

 ...

@Override
public Loader<List<WeatherItem>> onCreateLoader(int id, Bundle args) {
    Log.i(TAG, "onCreateLoader");
    return new FetchWeatherLoader(getActivity());
}

@Override
public void onLoadFinished(Loader<List<WeatherItem>> loader, List<WeatherItem> data) {
    Log.i(TAG, "onLoadFinished");
    mItems = data;
    setupAdapter();
}

@Override
public void onLoaderReset(Loader<List<WeatherItem>> loader) {
    Log.i(TAG, "onLoaderReset");
}

   .... 


  private static class FetchWeatherLoader extends AsyncTaskLoader<List<WeatherItem>>{

    public FetchWeatherLoader(Context context) {
        super(context);
    }

    @Override
    public List<WeatherItem> loadInBackground() {
        return new OpenWeatherFetch().fetchItems();
    }
}