content: /*
   * Copyright 2013 Chris Banes
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.zhaojian.jolly.tasks;
  
  import java.lang.ref.WeakReference;
  import java.util.ArrayList;
  import java.util.List;
  
  import android.content.Context;
  import android.database.Cursor;
  import android.os.AsyncTask;
  
  import com.zhaojian.jolly.model.MediaStoreBucket;
  import com.zhaojian.jolly.utils.MediaStoreCursorHelper;
  
  public class MediaStoreBucketsAsyncTask extends AsyncTask<Void, Void, List<MediaStoreBucket>> {
  
      public static interface MediaStoreBucketsResultListener {
  
          public void onBucketsLoaded(List<MediaStoreBucket> buckets);
      }
  
      private final WeakReference<Context> mContext;
      private final WeakReference<MediaStoreBucketsResultListener> mListener;
  
      public static void execute(Context context, MediaStoreBucketsResultListener listener) {
          new MediaStoreBucketsAsyncTask(context, listener).execute();
      }
  
      private MediaStoreBucketsAsyncTask(Context context, MediaStoreBucketsResultListener listener) {
          mContext = new WeakReference<Context>(context);
          mListener = new WeakReference<MediaStoreBucketsResultListener>(listener);
      }
  
      @Override
      protected List<MediaStoreBucket> doInBackground(Void... params) {
          ArrayList<MediaStoreBucket> result = null;
          Context context = mContext.get();
  
          if (null != context) {
              // Add 'All Photos' item
              result = new ArrayList<MediaStoreBucket>();
              result.add(MediaStoreBucket.getAllPhotosBucket(context));
  
              Cursor cursor = MediaStoreCursorHelper.openPhotosCursor(context,
                      MediaStoreCursorHelper.MEDIA_STORE_CONTENT_URI);
              if (null != cursor) {
                  MediaStoreCursorHelper.photosCursorToBucketList(cursor, result);
                  cursor.close();
              }
          }else{
   
          }
  
          return result;
      }
  
      @Override
      protected void onPostExecute(List<MediaStoreBucket> result) {
          super.onPostExecute(result);
  
          MediaStoreBucketsResultListener listener = mListener.get();
          if (null != listener) {
              listener.onBucketsLoaded(result);
          }
      }
  
  }
  