监听文件上传进度

OpenIM.iMManager.setUploadFileListener(
  OnUploadFileListener(
    onUploadProgress: (id, fileSize, streamSize, storageSize) {
      updateFileProgress(id, streamSize, fileSize);
    },
    onComplete: (id, size, url, type) {
      completeFileUpload(id, size, url, type);
    },
  ),
);