How to use

countInBackground

method

in

com.avos.avoscloud.AVQuery

protected int count(boolean needsLock) {
 final int[] value = {0};
 countInBackground(true, new CountCallback() {
  @Override
  public void done(int count, AVException e) {
   value[0] = count;
  }
 });
 return value[0];
}

protected int count(boolean needsLock) {
 final int[] value = {0};
 countInBackground(true, new CountCallback() {
  @Override
  public void done(int count, AVException e) {
   value[0] = count;
  }
 });
 return value[0];
}

/**
 * Counts the number of objects that match this query in a background thread. This does not use
 * caching.
 *
 * @param callback callback.done(count, e) will be called when the count completes.
 */
public void countInBackground(CountCallback callback) {
 this.countInBackground(false, callback);
}

/**
 * Counts the number of objects that match this query in a background thread. This does not use
 * caching.
 *
 * @param callback callback.done(count, e) will be called when the count completes.
 */
public void countInBackground(CountCallback callback) {
 this.countInBackground(false, callback);
}

/**
 * Counts the number of objects that match this query. This does not use caching.
 */
public int count() throws AVException {
 final int[] value = {0};
 countInBackground(true, new CountCallback() {
  @Override
  public void done(int count, AVException e) {
   if (e == null) {
    value[0] = count;
   } else {
    AVExceptionHolder.add(e);
   }
  }
  @Override
  protected boolean mustRunOnUIThread() {
   return false;
  }
 });
 if (AVExceptionHolder.exists()) {
  throw AVExceptionHolder.remove();
 }
 return value[0];
}

/**
 * Counts the number of objects that match this query. This does not use caching.
 */
public int count() throws AVException {
 final int[] value = {0};
 countInBackground(true, new CountCallback() {
  @Override
  public void done(int count, AVException e) {
   if (e == null) {
    value[0] = count;
   } else {
    AVExceptionHolder.add(e);
   }
  }
  @Override
  protected boolean mustRunOnUIThread() {
   return false;
  }
 });
 if (AVExceptionHolder.exists()) {
  throw AVExceptionHolder.remove();
 }
 return value[0];
}

/**
 * 从 server 获取未读消息的数量
 */
public void countUnreadRequests(final CountCallback countCallback) {
 AVQuery<AddRequest> addRequestAVQuery = AVObject.getQuery(AddRequest.class);
 addRequestAVQuery.setCachePolicy(AVQuery.CachePolicy.NETWORK_ONLY);
 addRequestAVQuery.whereEqualTo(AddRequest.TO_USER, LeanchatUser.getCurrentUser());
 addRequestAVQuery.whereEqualTo(AddRequest.IS_READ, false);
 addRequestAVQuery.countInBackground(new CountCallback() {
  @Override
  public void done(int i, AVException e) {
   if (null != countCallback) {
    unreadAddRequestsCount = i;
    countCallback.done(i, e);
   }
  }
 });
}