服务器&客户端代码更改是一个选项！

Server & client-side code change is an option!

首先，你不能完全阻止它(没有法律行动:).使用 SSL/TLS，这将有助于嗅探的可能性.

First, you can't prevent it completely (without legal action :). Use SSL/TLS, that will help with the sniffing posibility.

如果应用程序是直接从您的服务器(而不是通过应用程序商店/第三方)下载的，您可以对其进行更多保护.当用户下载应用程序时，请确保用户已通过身份验证，生成一个密钥，将其包含在应用程序中，并在与该用户的所有进一步通信中使用它.黑客/小偷可以模仿，但他们需要通过他们的服务器来模拟登录和下载您的应用程序 - 您可以找到并阻止它.

If the app is downloaded directly from your server (not through an app store/third party) you can secure it a bit more. When a user downloads the application make sure the user is authenticated, generate a key, include it in the application and use it in all further communication with that user. The hacker/thief can mimic that, but they'll need to go through their server to simulate a login and download of your application -- you can find and block that.