如何从主活动运行java.class

我是Android开发的初学者，希望有人能帮我一点忙

我想连接到本地服务器（IP）。我在GitHub中找到了一个应该可以实现这种连接的代码。但问题是这是一个

java.class

，而不是在我的

main活动中。因此，当我现在在模拟器中运行我的应用程序时，什么都没有发生。如何从
main活动中运行
Java.class

资料来源如下：

类别：

public class CreateTunnelingLink
{

    /**
     * Local endpoint, replace the IP address with your actual address. The local socket address is important for
     * multi-homed clients (several network interfaces), or if the address via InetAddress.getLocalHost is not useful.
     */
    private static final InetSocketAddress local = new InetSocketAddress("192.168.10.13", 3671);

    /**
     * Specifies the KNXnet/IP server to access the KNX network, insert your server's actual host name or IP address,
     * e.g., "192.168.1.20". The default port is where most servers listen on for new connection requests.
     */
    private static final InetSocketAddress server = new InetSocketAddress("myKnxServer.myHome",
            KNXnetIPConnection.DEFAULT_PORT);

    public static void main(final String[] args)
    {
        System.out.println("This example establishes a tunneling connection to the KNXnet/IP server " + server);

        // A KNX tunneling link supports NAT (Network Address Translation) if required.
        // We also indicate that the KNX installation uses twisted-pair (TP) medium, with TP1 being the most common.
        // KNXNetworkLink is the base interface implemented by all supported Calimero links to a KNX network.
        try (KNXNetworkLink knxLink = KNXNetworkLinkIP.newTunnelingLink(local, server, false, TPSettings.TP1)) {
            System.out.println("Connection established to server " + knxLink.getName());
            System.out.println("Close connection again");
        }
        catch (KNXException | InterruptedException e) {
            // KNXException: all Calimero-specific checked exceptions are subtypes of KNXException

            // InterruptedException: longer tasks that might block are interruptible, e.g., connection procedures. In
            // such case, an instance of InterruptedException is thrown.
            // If a task got interrupted, Calimero will clean up its internal state and resources accordingly.
            // Any deviation of such behavior, e.g., where not feasible, is documented in the Calimero API.

            System.out.println("Error creating KNXnet/IP tunneling link: " + e);
        }
    }
}


主要活动：


public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }


}

试试这个

public class MainActivity extends AppCompatActivity {

    private static final InetSocketAddress local = new InetSocketAddress("192.168.10.13", 3671);
    private static final InetSocketAddress server = new InetSocketAddress("myKnxServer.myHome",
            KNXnetIPConnection.DEFAULT_PORT);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // call your method to do the task
        yourMethodForMakingConnection();
    }

// for better separation you can create a method for this task
private void yourMethodForMakingConnection() {
        System.out.println("This example establishes a tunneling connection to the KNXnet/IP server " + server);

        // A KNX tunneling link supports NAT (Network Address Translation) if required.
        // We also indicate that the KNX installation uses twisted-pair (TP) medium, with TP1 being the most common.
        // KNXNetworkLink is the base interface implemented by all supported Calimero links to a KNX network.
        try (KNXNetworkLink knxLink = KNXNetworkLinkIP.newTunnelingLink(local, server, false, TPSettings.TP1)) {
            System.out.println("Connection established to server " + knxLink.getName());
            System.out.println("Close connection again");
        }
        catch (KNXException | InterruptedException e) {
            // KNXException: all Calimero-specific checked exceptions are subtypes of KNXException

            // InterruptedException: longer tasks that might block are interruptible, e.g., connection procedures. In
            // such case, an instance of InterruptedException is thrown.
            // If a task got interrupted, Calimero will clean up its internal state and resources accordingly.
            // Any deviation of such behavior, e.g., where not feasible, is documented in the Calimero API.

            System.out.println("Error creating KNXnet/IP tunneling link: " + e);
        }
}


}

如果代码正确，这应该可以工作。将
Activities
的
onCreate
功能视为主要功能。对于这么小的任务，您不需要另一个类

或者，您也可以在
MainActivity
中的
onCreate
方法中创建该类的实例，然后调用
main
方法，建立该类与对象的连接

不管怎样，你都能做到

您可以了解更多关于的基础知识，以便更好地理解这一点。
您可以包含java类和主要活动的代码吗？我已经添加了代码，我在主要活动中没有做任何事情，因为我不知道应该做什么。嗨，现在我可以运行我的应用程序了，所以我认为这是可行的。但是我得到一个错误：
I/System.out:创建KNXnet/IP隧道链接时出错：tuwien.auto.calimero.KNXException:从/192.168.10.118:3671连接到/192.168.10.13:3671:套接字失败：EPERM（不允许操作）
。也许我把IP地址弄错了。我知道服务器是192.168.10.13:3671，电脑是192.168.10.118，但可能端口错误？请尝试从您的设备完全卸载应用程序，然后重新安装，确保您的清单文件中也有Internet权限，如果没有，请添加这两个：我已经尝试过，我的清单中有这两个。我知道这个错误，它和上次不一样<代码>：从/192.168.10.118:3671连接到/192.168.10.13:3671:bind失败：EADDRNOTAVAIL（无法分配请求的地址）
。我将接受您的答案，因为这是我首先要问的问题。是的，您不能在主线程上进行网络调用。您可以使用诸如Reformation之类的库来为您处理事情，但是您仍然需要学习如何利用代码，所以没有什么可以逃避的！