所以我跟随着一个教程，使一个与Android工作室非常基本的聊天应用程序，但我得到的错误：

So I'm followin a tutorial to make a very basic chat app with Android Studio, but I'm getting the error:

错误：（131，45）错误：XMPPConnection是抽象的;不可能   实例

Error:(131, 45) error: XMPPConnection is abstract; cannot be instantiated

在下面一行：

ConnectionConfiguration connConfig = new ConnectionConfiguration(HOST, PORT, SERVICE);
         XMPPConnection connection = new XMPPConnection(connConfig); 

而我也得到了一些未处理的异常尝试使用XMPPConnection元素的时候。

And I'm also getting some "Unhandled exception" when trying to use XMPPConnection elements.

另外链接到教程： LINK

推荐答案

看起来啪4.0.0这样的改变。该文件还没有被更新。

Looks like this changed in Smack 4.0.0. The documentation still has not been updated.

和它看起来像他们将在拍击4.1再次进行更改：

And it looks like they will change it again in Smack 4.1:

What was     
Connection connection = new XMPPConnection()
is
XMPPConnection connection = new XMPPTCPConnection()
in Smack 4 and will become
AbstractXMPPConnection connection = new XMPPTCPConnection()
in Smack 4.1

请参阅此链接：https://igniterealtime.org/issues/browse/SMACK-574

还有用于SMACK 4.0升级指南：https://community.igniterealtime.org/docs/DOC-2703

There is also an upgrade guide for SMACK 4.0: https://community.igniterealtime.org/docs/DOC-2703

更新：

此外，看起来像新的拍击4.x的库将只使用Java 7及以上运行。 Java 6的向后兼容性被打破了。

Also, looks like the new Smack 4.x libraries will only run with Java 7 and above. Java 6 backwards compatibility is broken.