无法与 aSmack 4.0.2 建立新连接

我正在学习 Android 编程，这几天我一直在努力解决这个问题。我正在编写一个应该连接到 XMPP 服务器的 Android 应用程序。我总是遇到同样的错误，并且真的不知道我做错了什么。我尝试过通过谷歌找到的示例代码，但也无法与它们建立连接。

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

    Context context = getApplicationContext();
    SmackAndroid.init(context);

    ConnectionConfiguration ConnectionConfiguration = new ConnectionConfiguration("192.168.0.101", 5222);
    ConnectionConfiguration.setDebuggerEnabled(true);
    XMPPConnection connection = new XMPPTCPConnection(ConnectionConfiguration);


  try {
    connection.connect();
} catch (ConnectionException e) {
    Log.e("ERROR", "ConnectionException", e);
    for (int i = 0; i < e.getFailedAddresses().size(); i++) {
        HostAddress element = e.getFailedAddresses().get(i);
        Log.e("ERROR", element.getErrorMessage().toString());
    }
} catch (Exception e) {
    Log.e("ERROR", "Exception", e);
}
   // Log into the server
   try {
    connection.login("user", "password", "SomeResource");
   } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

这是我收到的错误：

08-11 15:48:27.476: E/ERROR(11117): ConnectionException
08-11 15:48:27.476: E/ERROR(11117): org.jivesoftware.smack.SmackException$ConnectionException
08-11 15:48:27.476: E/ERROR(11117):     at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectUsingConfiguration(XMPPTCPConnection.java:433)
08-11 15:48:27.476: E/ERROR(11117):     at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectInternal(XMPPTCPConnection.java:808)
08-11 15:48:27.476: E/ERROR(11117):     at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:396)
08-11 15:48:27.476: E/ERROR(11117):     at com.example.gps_pubsub.MainActivity.onCreate(MainActivity.java:34)
08-11 15:48:27.476: E/ERROR(11117):     at android.app.Activity.performCreate(Activity.java:5047)
08-11 15:48:27.476: E/ERROR(11117):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
08-11 15:48:27.476: E/ERROR(11117):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2056)
08-11 15:48:27.476: E/ERROR(11117):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2117)
08-11 15:48:27.476: E/ERROR(11117):     at android.app.ActivityThread.access$700(ActivityThread.java:134)
08-11 15:48:27.476: E/ERROR(11117):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1218)
08-11 15:48:27.476: E/ERROR(11117):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-11 15:48:27.476: E/ERROR(11117):     at android.os.Looper.loop(Looper.java:137)
08-11 15:48:27.476: E/ERROR(11117):     at android.app.ActivityThread.main(ActivityThread.java:4867)
08-11 15:48:27.476: E/ERROR(11117):     at java.lang.reflect.Method.invokeNative(Native Method)
08-11 15:48:27.476: E/ERROR(11117):     at   java.lang.reflect.Method.invoke(Method.java:511)
08-11 15:48:27.476: E/ERROR(11117):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
08-11 15:48:27.476: E/ERROR(11117):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
08-11 15:48:27.476: E/ERROR(11117):     at dalvik.system.NativeStart.main(Native Method)
08-11 15:48:27.476: E/ERROR(11117): 192.168.0.101:5222 Exception: null

我还检查了防火墙是否允许连接，并尝试连接到 Hosted.im 服务而不是家庭服务器，结果相同。

I have this line added to MANIFEST:
<uses-permission android:name="android.permission.INTERNET"/>

我遇到了同样的问题，但在这里找到了解决方案：简单的 Asmack 程序无法运行 https://stackoverflow.com/questions/24482595/simple-asmack-program-not-working

解决方案是将连接代码放入单独的线程中。

public static final String HOST = "208.68.163.218"; //write your host name
public static final int PORT = 5222;

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

public void connect() {
    Thread t = new Thread(new Runnable() {

        @Override
        public void run() {
            Context context = getApplicationContext();
            SmackAndroid.init(context);
            ConnectionConfiguration ConnectionConfiguration = new ConnectionConfiguration(HOST, PORT);
            ConnectionConfiguration.setDebuggerEnabled(true);
            XMPPConnection connection = new XMPPTCPConnection(ConnectionConfiguration);     

            try {
                connection.connect();
            } catch (ConnectionException e) {
                e.printStackTrace();
            } catch (SmackException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (XMPPException e) {
                e.printStackTrace();
            }
        }
    });
    t.start();
}