Question

我使用aSmack和Openfire数据库制作聊天应用程序。现在我因为NullPointerException而堆叠，这是在我尝试登录时发生的。有人可以帮我解决这个问题吗？我真的不知道该怎么做。导致连接，loginUser，密码不为空。这些信息来自我的logcat。

org.jivesoftware.smack.tcp.XMPPTCPConnection@42c4fca0连接

AJ1 loginUser

密码54密码

我的代码：

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

            @Override
            public void run() {
                XMPPTCPConnectionConfiguration.Builder ConnectionConfiguration = XMPPTCPConnectionConfiguration.builder();
                ConnectionConfiguration.setServiceName("lucky");
                ConnectionConfiguration.setHost("192.168.100.5");
                ConnectionConfiguration.setPort(5222);
                ConnectionConfiguration.setSecurityMode(org.jivesoftware.smack.ConnectionConfiguration.SecurityMode.disabled);
                ConnectionConfiguration.setDebuggerEnabled(true);
                connection = new XMPPTCPConnection(ConnectionConfiguration.build());
                XMPPConnectionListener xmppConnectionListener = new XMPPConnectionListener();
                connection.addConnectionListener(xmppConnectionListener);
                try {

                    connection.connect();    //Error here

                } catch (SmackException.ConnectionException e) {
                  //  e.printStackTrace();
                    Log.e("Point_1","Exception " + e);
                } catch (SmackException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (XMPPException e) {
                    e.printStackTrace();
                }
            }
        });
        t.start();
    }
public class XMPPConnectionListener implements ConnectionListener {
        @Override
        public void connected(XMPPConnection connection) {
            if(!connection.isAuthenticated()){

                login();    //Error here

                Log.e("Point_login", "XMPPListener, login()");
            }
            connected = true;
            Log.e("Point_login", "XMPPListener, connected()");
        }

        @Override
        public void authenticated(XMPPConnection connection, boolean resumed) {
            loggedin = true;
            Log.e("Point_login", "XMPPListener, authenticated");
        }

        @Override
        public void connectionClosedOnError(Exception e) {
            Log.e("Point_login", "XMPPListener, connectinClosedOnError " + e);
            loggedin = false;
            connected = false;
            isChatCreated = false;
        }

        @Override
        public void connectionClosed() {
            loggedin = false;
            connected = false;
            isChatCreated = false;
            Log.e("Point_login", "XMPPListener, connectionClosed");
        }

        @Override
        public void reconnectingIn(int seconds) {
            loggedin = false;
            Log.e("Point_login", "XMPPListener, reconnectingIn");
        }

        @Override
        public void reconnectionFailed(Exception e) {
            loggedin = false;
            connected = false;
            isChatCreated = false;
            Log.e("Point_login", "XMPPListener, reconnectionFailed");
        }

        @Override
        public void reconnectionSuccessful() {
            loggedin = false;
            connected = true;
            isChatCreated = false;
            Log.e("Point_login", "XMPPListener, reconnectionSuccessful");
        }


    }
public void login(){
        try{
            Log.e("Point_login", String.valueOf(connection) + " connection");
            Log.e("Point_login", String.valueOf(loginUser) + " loginUser");
            Log.e("Point_login", String.valueOf(password) + " password");

            connection.login(loginUser,password);    //Error here

        }catch(SmackException.NotConnectedException e){
            Log.e("Login_1","Exception");
            for(int i=0;i<=5;i++){
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            Thread.sleep(1000);
                        }catch (InterruptedException e){
                            e.printStackTrace();
                        }
                    }
                }).start();
            }
        }catch(XMPPException | SmackException | IOException e){
            e.printStackTrace();
            Log.e("Login_1","2nd Exception");
        }
    }

我的logcat：

E/AndroidRuntime﹕ FATAL EXCEPTION: Thread-2634
    java.lang.NullPointerException
            at org.jivesoftware.smack.util.stringencoder.Base64.encode(Base64.java:64)
            at org.jivesoftware.smack.util.stringencoder.Base64.encode(Base64.java:60)
            at org.jivesoftware.smack.util.stringencoder.Base64.encodeToString(Base64.java:42)
            at org.jivesoftware.smack.sasl.SASLMechanism.authenticate(SASLMechanism.java:199)
            at org.jivesoftware.smack.sasl.SASLMechanism.authenticate(SASLMechanism.java:169)
            at org.jivesoftware.smack.SASLAuthentication.authenticate(SASLAuthentication.java:236)
            at org.jivesoftware.smack.tcp.XMPPTCPConnection.loginNonAnonymously(XMPPTCPConnection.java:365)
            at org.jivesoftware.smack.AbstractXMPPConnection.login(AbstractXMPPConnection.java:452)
            at org.jivesoftware.smack.AbstractXMPPConnection.login(AbstractXMPPConnection.java:427)
            at com.lets.dothis.myapplication.XMPP.login(XMPP.java:180)
            at com.lets.dothis.myapplication.XMPP$XMPPConnectionListener.connected(XMPP.java:206)
            at org.jivesoftware.smack.AbstractXMPPConnection.callConnectionConnectedListener(AbstractXMPPConnection.java:1152)
            at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectInternal(XMPPTCPConnection.java:841)
            at org.jivesoftware.smack.AbstractXMPPConnection.connect(AbstractXMPPConnection.java:360)
            at com.lets.dothis.myapplication.XMPP$1.run(XMPP.java:150)
            at java.lang.Thread.run(Thread.java:856)

谢谢。

Answer 1

在login（）方法中传递“XMPPConnection”对象，即“连接”，如登录（连接）

然后，IN .... connection.login（loginUser，password）; 用

替换该行

if(!connection.isAuthenticated())  
            login(connection, loginUser, passwordUser);  
else connection.login(loginUser, passwordUser);

我希望它能奏效。请不要与两个具有相同名称的对象发生冲突 XMPPConnection＆amp; XMPPTCPConnection，为简单起见，只需重命名一个。

<强>全球化志愿服务青年

http://xmpp-tutorials.blogspot.com.br/

请试试＆amp;如果还有任何例外，请告诉我。谢谢

无法登录，NullPointerException

1 个答案: