Simplest and efficient solution is to use a chat sdk. There are plenty of chat as a service solution available which provides the chat sdk along with backend. Have a look at https://www.applozic.com/docs/android-chat-sdk.html
我将使用 Google Talk API 构建 XMPP 客户端。这样，注册&c。为您处理；您不必担心维护用户数据库、连接、正常运行时间等。
I would use the Google Talk API to build an XMPP client. That way, registration &c. are handled for you; you don't have to worry about maintaining a user database, connectivity, uptime, and so forth.
Sai, The simplest way to make chat application is to make through web services. If want to make using web services then let me know,i will guide you step by step.
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最简单有效的解决方案是使用聊天 sdk。有很多可用的聊天即服务解决方案，它们提供聊天 sdk 和后端。看看 https://www.applozic.com/docs/android-chat -sdk.html
Github Android SDK：https://github.com/AppLozic/Applozic -Android-SDK
下面的教程会有帮助：
https://dzone.com/articles/add-chat-using -5 分钟内应用
Simplest and efficient solution is to use a chat sdk. There are plenty of chat as a service solution available which provides the chat sdk along with backend. Have a look at https://www.applozic.com/docs/android-chat-sdk.html
Github Android SDK: https://github.com/AppLozic/Applozic-Android-SDK
Below tutorial will be of help:
https://dzone.com/articles/add-chat-using-applozic-in-5-mins
我将使用 Google Talk API 构建 XMPP 客户端。这样，注册&c。为您处理；您不必担心维护用户数据库、连接、正常运行时间等。
I would use the Google Talk API to build an XMPP client. That way, registration &c. are handled for you; you don't have to worry about maintaining a user database, connectivity, uptime, and so forth.
Sai，制作聊天应用程序的最简单方法是通过网络服务来制作。
如果想使用网络服务，请告诉我，我将逐步指导您。
Sai, The simplest way to make chat application is to make through web services.
If want to make using web services then let me know,i will guide you step by step.
您可以使用 xmpp 协议进行简单的聊天应用程序，该应用程序由 smack api 支持。
请查看链接。 过时的示例
更新：
以上教程的更新代码在这里
You can use xmpp protocol for simple chat application which is supported by smack api.
Please look at the link. OUTDATED SAMPLE
UPDATE :
Updated code of above tutorial is here
如果您希望在应用程序中实现聊天功能，也许 这篇文章可以帮助你。
If you are looking forward to implement chat functionality in your application, maybe this Post can help you.
您可以使用 opentalkon 聊天 api https://github.com/OpenTalkOn/ 构建自己的聊天应用程序OpenTalkOn-Android-Chat-API
opentalkon api 非常简单。
消息发送
您可以使用 doSendMessage(TADataHandler handler, Long room_id, String msg, Long transact_id) 方法轻松发送消息。
消息接收
您可以使用setClientInterfaceMsgHandler（MessageHandler handler）方法轻松注册用于接收消息的处理程序。
我推荐使用 opentalkon api！
you can build your own chat app with opentalkon chat api https://github.com/OpenTalkOn/OpenTalkOn-Android-Chat-API
opentalkon api is very simple.
Message Send
You can easily send message with doSendMessage(TADataHandler handler, Long room_id, String msg, Long transact_id) method.
Message Receive
You can easily register handler for receiving message with setClientInterfaceMsgHandler (MessageHandler handler) method.
I recommend to use opentalkon api!