这两个是一样的。
现在有个更好的选择,升级一下 app-server,里面包含的 server sdk 是 1.3.2 版本,支持直接构建并发送 ImageMessageContent
等具体的消息,而不用直接构建 MessagePayload
类似下面这种发送:
ImageMessageContent imageMessageContent = new ImageMessageContent();
String thumbnailBase64edData = "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";
imageMessageContent.setThumbnailBytes(Base64.getDecoder().decode(thumbnailBase64edData));
imageMessageContent.setRemoteMediaUrl("https://media.wfcoss.cn/firechat/image_message_sample.jpg");
payload = imageMessageContent.encode();
resultSendMessage = MessageAdmin.sendMessage(sender, conversation, payload, (List)null);
更多示例,请参考 server sdk
里面的 Main