How to use

orderByDescending

method

in

com.avos.avoscloud.AVQuery

private UpdateInfo getNewestUpdateInfo() throws AVException {
 AVQuery<UpdateInfo> query = AVObject.getQuery(UpdateInfo.class);
 query.setLimit(1);
 query.orderByDescending(UpdateInfo.VERSION);
 if (policy != null) {
  query.setCachePolicy(policy);
 }
 List<UpdateInfo> updateInfos = query.find();
 if (updateInfos.size() > 0) {
  return updateInfos.get(0);
 }
 return null;
}

/**
 * 从服务器查看是否需要下载图片
 *
 * @param callBack
 */
public void isDownloadImage(final IsDownloadCallBack callBack) {
  AVQuery<AVObject> query = new AVQuery<AVObject>(CLASS_NAME);
  query.orderByDescending(ID);
  query.setLimit(1);
  query.findInBackground(new FindCallback<AVObject>() {
    @Override
    public void done(List<AVObject> list, AVException e) {
      if (null == e) {
        if (list.size() == 1) {
          if (sp.getInt("image", -1) < list.get(0).getInt(ID)) {
            callBack.done(true, list.get(0));
          } else {
            callBack.done(false, null);
          }
        } else
          callBack.done(false, null);
      } else
        callBack.done(false, null);
    }
  });
}

query.orderByDescending(VERSION_NAME);
query.whereGreaterThan(VERSION_NAME, getVersionName());
query.findInBackground(new FindCallback<AVObject>() {

private void loadMoreFriend(int skip, final int limit, final boolean isRefresh) {
 AVQuery<LeanchatUser> q = LeanchatUser.getQuery(LeanchatUser.class);
 q.whereContains(LeanchatUser.USERNAME, searchName);
 q.limit(Constants.PAGE_SIZE);
 q.skip(skip);
 LeanchatUser user = LeanchatUser.getCurrentUser();
 List<String> friendIds = new ArrayList<String>(FriendsManager.getFriendIds());
 friendIds.add(user.getObjectId());
 q.whereNotContainedIn(Constants.OBJECT_ID, friendIds);
 q.orderByDescending(Constants.UPDATED_AT);
 q.setCachePolicy(AVQuery.CachePolicy.NETWORK_ELSE_CACHE);
 q.findInBackground(new FindCallback<LeanchatUser>() {
  @Override
  public void done(List<LeanchatUser> list, AVException e) {
   UserCacheUtils.cacheUsers(list);
   recyclerView.setLoadComplete(null == list ? null : list.toArray(), false);
   if (null != e) {
    showToast(e.getMessage());
   }
  }
 });
}

public void findAddRequests(int skip, int limit, FindCallback findCallback) {
 LeanchatUser user = LeanchatUser.getCurrentUser();
 AVQuery<AddRequest> q = AVObject.getQuery(AddRequest.class);
 q.include(AddRequest.FROM_USER);
 q.skip(skip);
 q.limit(limit);
 q.whereEqualTo(AddRequest.TO_USER, user);
 q.orderByDescending(AVObject.CREATED_AT);
 q.setCachePolicy(AVQuery.CachePolicy.NETWORK_ELSE_CACHE);
 q.findInBackground(findCallback);
}

 q.whereNear(LeanchatUser.LOCATION, geoPoint);
} else {
 q.orderByDescending(Constants.UPDATED_AT);