android.support.v4.app.LoaderManager#LoaderCallbacks ( )源码实例Demo

private void loadWeather(boolean restart) {
    mWeatherLayout.setVisibility(View.INVISIBLE);
    mErrorLayout.setVisibility(View.GONE);
    mLoadingView.showLoadingIndicator();
    LoaderManager.LoaderCallbacks<City> callbacks = new WeatherCallbacks();
    if (restart) {
        getSupportLoaderManager().restartLoader(R.id.weather_loader_id, Bundle.EMPTY, callbacks);
    } else {
        getSupportLoaderManager().initLoader(R.id.weather_loader_id, Bundle.EMPTY, callbacks);
    }
}
 

/**
 * Init Loader Manager for fragment
 * @param fragment fragment
 * @param callbacks callbacks
 * @param args arguments for loader construction
 * @param <T>
 */
public <T> LoaderManagerCreator(Fragment fragment, LoaderManager.LoaderCallbacks<T> callbacks, Bundle args) {
    this(
            fragment.getActivity().getApplicationContext(),
            fragment.getLoaderManager(),
            (int) HashUtil.longHash(((Object) fragment).getClass(), fragment.getArguments(), callbacks),
            callbacks,
            args
    );
}
 

/**
 * Init Loader Manager for Activity
 * @param activity activity
 * @param callbacks callbacks
 * @param args arguments for loader construction
 * @param <T>
 */
public <T> LoaderManagerCreator(FragmentActivity activity, LoaderManager.LoaderCallbacks<T> callbacks, Bundle args) {
    this(
            activity.getApplicationContext(),
            activity.getSupportLoaderManager(),
            (int) HashUtil.longHash(((Object) activity).getClass(), activity.getIntent(), callbacks),
            callbacks,
            args
    );
}
 

/**
 * Init LoaderManager for Fragment.
 * @param fragment fragment
 * @param callbacks Loader callbacks
 * @param <T> usually Cursor
 */
public <T> LoaderManagerCreator(Fragment fragment, LoaderManager.LoaderCallbacks<T> callbacks) {
    this(fragment, callbacks, null);

}
 

/**
 * Init LoaderManager for Activity.
 * @param activity activity
 * @param callbacks Loader callbacks
 * @param <T> usually Cursor
 */
public <T> LoaderManagerCreator(FragmentActivity activity, LoaderManager.LoaderCallbacks<T> callbacks) {
    this(activity, callbacks, null);
}
 

/**
 * Init Loader Manager
 * @param context context
 * @param loaderManager loader manager
 * @param loaderId loader id
 * @param callbacks callbacks
 * @param args arguments for loader construction
 * @param <T>
 */
public <T> LoaderManagerCreator(Context context, LoaderManager loaderManager, int loaderId, LoaderManager.LoaderCallbacks<T> callbacks, Bundle args) {
    loaderManager.initLoader(loaderId, args, callbacks);
}