Android 无法连接到xmpp服务器

我试着用xmpp连接Gmail服务器。它成功了。但是当我试着连接我的本地xmpp服务器时它不起作用。这是代码片段

// Create a connection
    SmackConfiguration.setPacketReplyTimeout(500);

    ConnectionConfiguration connConfig =
            new ConnectionConfiguration("ubuntu", 5222,"ubuntu");
    XMPPConnection connection = new XMPPConnection(connConfig);

    try {
        connection.connect();
        Log.i("XMPPClient", "[SettingsDialog] Connected to " + connection.getHost());
    } catch (XMPPException ex) {
        Log.e("XMPPClient", "[SettingsDialog] Failed to connect to " + connection.getHost());
        Log.e("XMPPClient", ex.toString());
        xmppClient.setConnection(null);
    }

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您的android internetbrowser能否从本地服务器读取html页面？您是否尝试使用ip而不是

http://ubuntu/index.htm

？我现在使用的是IP地址，我工作过。谢谢