downloadThumbImage method
下载缩略图
@param target 聊天对象, JMSingle | JMGroup | JMChatRoom @param messageId 本地数据库中的消息 id,非 serverMessageId
Implementation
Future<Map> downloadThumbImage({
@required dynamic target,
@required String messageId,
}) async {
Map param = target.toJson();
param['messageId'] = messageId;
Map resJson = await _channel.invokeMethod('downloadThumbImage', param..removeWhere((key, value) => value == null));
return {
'messageId': resJson['messageId'],
'filePath': resJson['filePath']
};
}