登录异常SASL身份验证在android中使用机制DIGEST-MD5 asmack失败

使用DIGEST-MD5机制登录异常SASL身份验证失败

我使用这个代码,任何人都可以帮助我,或代码

try {
        if (xmppConnection == null) {
            ConnectionConfiguration config = new ConnectionConfiguration(
                    SERVER_HOST,SERVER_PORT,service_name);
            xmppConnection = new XMPPConnection(config);
            System.out.println("xmppConnection"+xmppConnection);
        }

        if (!xmppConnection.isConnected()) {
            xmppConnection.connect();
            System.out.println("ConnecTing");
        }

        System.out.println("facebook id get xmpp "+userName);

        if (!xmppConnection.isAuthenticated()) {
            xmppConnection.login(username,"123");
            System.out.println("User is authenticated ");

        }
        Presence presence = new Presence(Presence.Type.availablE);
        xmppConnection.sendPacket(presencE);
                 } catch (Exception E) {
        System.out.println("Login exception "+E);
        e.printStackTrace();
    }