How to use

SaveCallback

in

cn.leancloud.callback

 protected final void internalDone0(T returnValue, AVException e) {
  done(e);
 }
}

 @Override
 public void done(AVException e) {
  file.put(FILE_META, metaData);
  if (callback != null) {
   callback.internalDone(e);
  }
 }
});

 @Override
 public void done(AVException e) {
  if (e != null) {
   callback.internalDone(e);
  } else {
   fulFillFileInfo(callback);
  }
 }
}));

protected void upload(final SaveCallback callback) {
 if (actualFile != null) {
  actualFile.saveInBackground().subscribe(ObserverBuilder.buildSingleObserver(new SaveCallback() {
   @Override
   public void done(AVException e) {
    if (e != null) {
     callback.internalDone(e);
    } else {
     fulFillFileInfo(callback);
    }
   }
  }));
 } else {
  callback.internalDone(new AVException(new RuntimeException("cannot find the file!")));
 }
}

protected void getAdditionalMetaData(Map<String, Object> meta, SaveCallback callback) {
 if (!this.hasAdditionalMetaAttr) {
  callback.internalDone(null);
 } else if (!StringUtil.isEmpty(actualFile.getUrl()) && localFile == null
      && !isExternalAVFile(actualFile)) {
  OkHttpClient client = PaasClient.getGlobalOkHttpClient();
  Request.Builder builder = new Request.Builder();
  try {
   Response rawResponse = client.newCall(builder.url(actualFile.getUrl() + getQueryName()).get().build()).execute();
   String content = rawResponse.body().string();
   com.alibaba.fastjson.JSONObject response = JSON.parseObject(content);
   com.alibaba.fastjson.JSONObject formatInfo = response.getJSONObject(FORMAT);
   parseAdditionalMetaData(meta, formatInfo);
   callback.internalDone(null);
  } catch (IOException ex) {
   callback.internalDone(new AVException(ex));
  } catch (Exception e1) {
   callback.internalDone(new AVException(e1));
  }
 } else {
  callback.internalDone(null);
 }
}

protected void fulFillFileInfo(final SaveCallback callback) {
 // fulfill the file info map with AVFile
 if (actualFile != null) {
  file = getFile() == null ? new HashMap<String, Object>() : getFile();
  file.put(OBJECT_ID, actualFile.getObjectId());
  file.put(FILE_URL, actualFile.getUrl());
  file.remove(LOCAL_PATH);
  final Map<String, Object> metaData =
      getFileMetaData() == null ? new HashMap<String, Object>() : getFileMetaData();
  if (!metaData.containsKey(FILE_SIZE)) {
   metaData.put(FILE_SIZE, actualFile.getSize());
  }
  getAdditionalMetaData(metaData, new SaveCallback() {
   @Override
   public void done(AVException e) {
    file.put(FILE_META, metaData);
    if (callback != null) {
     callback.internalDone(e);
    }
   }
  });
 } else {
  callback.internalDone(new AVException(new RuntimeException("cannot find the file!")));
 }
}