android - 如何在 Android 上使用 Smack

Question

我有以下代码使用 smack 4.1.0 与 xmpp 服务器 im.koderoot.net 连接，此主机/服务正在为我使用 smack3.1.0 和 smacx3.1.0 的 java 应用程序工作，但在 java 中，当我我正在使用它抛出以下异常的 jar

09-01 18:29:18.921: E/SMACK EXCEPTION(1577): org.jivesoftware.smack.SmackException$ConnectionException: The following addresses failed: im.koderoot.net:5222 Exception: null

主 Activity .java

package com.example.zzxmpp;


import java.io.IOException;

import org.jivesoftware.smack.ConnectionListener;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.XMPPException;

import org.jivesoftware.smack.tcp.XMPPTCPConnection;
import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener{

    private XMPPTCPConnection mConnection;
    private Button connect;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        connect = (Button) findViewById(R.id.button1);
        connect.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
          XMPPTCPConnectionConfiguration.XMPPTCPConnectionConfigurationBuilder builder = XMPPTCPConnectionConfiguration.builder();
            builder.setServiceName("im.koderoot.net");
            builder.setPort(5222);
            builder.setResource("SmackAndroidTestClient");
            builder.setUsernameAndPassword("xxxx", "xxxx");
            builder.setRosterLoadedAtLogin(true);


            mConnection = new XMPPTCPConnection(builder.build());
            //Set ConnectionListener here to catch initial connect();
          //  mConnection.addConnectionListener(this);

            try {
                mConnection.connect();
                mConnection.login();
                Toast.makeText(getApplicationContext(), "Sucess", Toast.LENGTH_LONG).show();
            } catch (SmackException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), "Smack Exception"+e, Toast.LENGTH_LONG).show();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), "IO Exception"+e, Toast.LENGTH_LONG).show();
            } catch (XMPPException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), "XMPP Exception"+e, Toast.LENGTH_LONG).show();
            }

    }


}

我在项目中有以下 .jar 文件

smack-android-4.1.0-alpha6.jar

smack-tcp-4.1.0-alpha6.jar

minidns-0.1.1.jar

smack-sasl-provided-4.1.0-alpha6.jar

smack-core-4.1.0-alpha6.jar

smack-resolver-minidns-4.1.0-alpha6.jar

jxmpp-util-cache-0.4.0-alpha2.jar

jxmpp-core-0.4.0.jar

我自己找到了以下可行的解决方案

将所有jar文件替换为asmack-2010.05.07.jar和asmack-jse-buddycloud-2010.12.11.jar

并将代码更改为以下内容

package com.demo.xmppchat;

import java.util.ArrayList;
import java.util.Collection;

import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.Roster;
import org.jivesoftware.smack.RosterEntry;
import org.jivesoftware.smack.SASLAuthentication;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.filter.MessageTypeFilter;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.util.StringUtils;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;

public class XMPPChatDemoActivity extends Activity {

    public static final String HOST = "im.koderoot.net";
    public static final int PORT = 5222;
    //public static final String SERVICE = "slogin.oscar.aol.com";

    public static final String USERNAME = "XXXXXXX";
    public static final String PASSWORD = "XXXXXX";

    private XMPPConnection connection;
    private ArrayList<String> messages = new ArrayList<String>();
    private Handler mHandler = new Handler();

    private EditText recipient;
    private EditText textMessage;
    private ListView listview;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        recipient = (EditText) this.findViewById(R.id.toET);
        textMessage = (EditText) this.findViewById(R.id.chatET);
        listview = (ListView) this.findViewById(R.id.listMessages);
        setListAdapter();

        // Set a listener to send a chat text message
        Button send = (Button) this.findViewById(R.id.sendBtn);
        send.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                String to = recipient.getText().toString();
                String text = textMessage.getText().toString();

                Log.i("XMPPChatDemoActivity", "Sending text " + text + " to " + to);
                Message msg = new Message(to, Message.Type.chat);
                msg.setBody(text);              
                if (connection != null) {
                    connection.sendPacket(msg);
                    messages.add(connection.getUser() + ":");
                    messages.add(text);
                    setListAdapter();
                }
            }
        });

        connect();
    }

    /**
     * Called by Settings dialog when a connection is established with the XMPP
     * server
     * 
     * @param connection
     */
    public void setConnection(XMPPConnection connection) {
        this.connection = connection;
        if (connection != null) {
            // Add a packet listener to get messages sent to us
            PacketFilter filter = new MessageTypeFilter(Message.Type.chat);
            connection.addPacketListener(new PacketListener() {
                @Override
                public void processPacket(Packet packet) {
                    Message message = (Message) packet;
                    if (message.getBody() != null) {
                        String fromName = StringUtils.parseBareAddress(message
                                .getFrom());
                        Log.i("XMPPChatDemoActivity", "Text Recieved " + message.getBody()
                                + " from " + fromName );
                        messages.add(fromName + ":");
                        messages.add(message.getBody());
                        // Add the incoming message to the list view
                        mHandler.post(new Runnable() {
                            public void run() {
                                setListAdapter();
                            }
                        });
                    }
                }
            }, filter);
        }
    }

    private void setListAdapter() {
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                R.layout.listitem, messages);
        listview.setAdapter(adapter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        try {
            if (connection != null)
                connection.disconnect();
        } catch (Exception e) {

        }
    }

    public void connect() {

        final ProgressDialog dialog = ProgressDialog.show(this,
                "Connecting...", "Please wait...", false);

        Thread t = new Thread(new Runnable() {

            @Override
            public void run() {
                // Create a connection
                ConnectionConfiguration connConfig = new ConnectionConfiguration(
                        HOST, PORT);//, SERVICE);
                XMPPConnection connection = new XMPPConnection(connConfig);

                try {
                    connection.connect();
                    Log.i("XMPPChatDemoActivity",
                            "Connected to " + connection.getHost());
                } catch (XMPPException ex) {
                    Log.e("XMPPChatDemoActivity", "Failed to connect to "
                            + connection.getHost());
                    Log.e("XMPPChatDemoActivity", ex.toString());
                    setConnection(null);
                }
                try {
                    SASLAuthentication.supportSASLMechanism("PLAIN", 0);
                    connection.login(USERNAME, PASSWORD);
                    Log.i("XMPPChatDemoActivity",
                            "Logged in as " + connection.getUser());

                    // Set the status to available
                    Presence presence = new Presence(Presence.Type.available);
                    connection.sendPacket(presence);
                    setConnection(connection);

                    Roster roster = connection.getRoster();
                    Collection<RosterEntry> entries = roster.getEntries();
                    for (RosterEntry entry : entries) {
                        Log.d("XMPPChatDemoActivity",
                                "--------------------------------------");
                        Log.d("XMPPChatDemoActivity", "RosterEntry " + entry);
                        Log.d("XMPPChatDemoActivity",
                                "User: " + entry.getUser());
                        Log.d("XMPPChatDemoActivity",
                                "Name: " + entry.getName());
                        Log.d("XMPPChatDemoActivity",
                                "Status: " + entry.getStatus());
                        Log.d("XMPPChatDemoActivity",
                                "Type: " + entry.getType());
                        Presence entryPresence = roster.getPresence(entry
                                .getUser());


                        Log.d("XMPPChatDemoActivity", "Presence Status: "
                                + entryPresence.getStatus());
                        Log.d("XMPPChatDemoActivity", "Presence Type: "
                                + entryPresence.getType());
                        Presence.Type type = entryPresence.getType();
                        if (type == Presence.Type.available)
                            Log.d("XMPPChatDemoActivity", "Presence AVIALABLE");
                        Log.d("XMPPChatDemoActivity", "Presence : "
                                + entryPresence);

                    }
                } catch (XMPPException ex) {
                    Log.e("XMPPChatDemoActivity", "Failed to log in as "
                            + USERNAME);
                    Log.e("XMPPChatDemoActivity", ex.toString());
                    setConnection(null);
                }

                dialog.dismiss();
            }
        });
        t.start();
        dialog.show();
    }
}

Answer 1

无法访问主机时抛出 ConnectionException。

检查以下内容可能对您有帮助。

1. 忘记在 list 文件中添加权限(我经常这样做)

使用权限 android:name="android.permission.INTERNET"

1. 检查它是否可以从您的 Android 设备 ping im.koderoot.net
2. 添加 e.printStackTrace(); at exception catch 会给出更多提示

我刚刚在 im.koderoot.net 上注册并使用 smack4.1.3 连接没有问题。

还有一点是您的代码从长远来看会导致 ANR(应用程序无响应)，但这是另一个话题。