要获取访问令牌，您必须先登录

to get access token first you have to login

fb.authorize(FacebookActivity.this, new String[] {"xmpp_login"},Facebook.FORCE_DIALOG_AUTH, new DialogListner());

SASLXFacebookPlatformMecha 类

SASLXFacebookPlatformMecha class

import java.io.IOException;
import java.net.URLEncoder;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Map;

import org.apache.harmony.javax.security.auth.callback.CallbackHandler;
import org.apache.harmony.javax.security.sasl.Sasl;
import org.jivesoftware.smack.SASLAuthentication;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.sasl.SASLMechanism;
import org.jivesoftware.smack.util.Base64;

public class SASLXFacebookPlatformMecha extends SASLMechanism {

private static final String NAME = "X-FACEBOOK-PLATFORM";

private String apiKey = "";
private String access_token = "";

/**
 * Constructor.
 */
public SASLXFacebookPlatformMecha(SASLAuthentication saslAuthentication) {
    super(saslAuthentication);
}

@Override
protected void authenticate() throws IOException, XMPPException {

    getSASLAuthentication().send(new AuthMechanism(NAME, ""));
}

@Override
public void authenticate(String apiKey, String host, String acces_token)
        throws IOException, XMPPException {
    if (apiKey == null || acces_token == null) {
        throw new IllegalArgumentException("Invalid parameters");
    }

    this.access_token = acces_token;
    this.apiKey = apiKey;
    this.hostname = host;

    String[] mechanisms = { NAME };
    Map<String, String> props = new HashMap<String, String>();
    this.sc = Sasl.createSaslClient(mechanisms, null, "xmpp", host, props,
            this);
    authenticate();
}

@Override
public void authenticate(String username, String host, CallbackHandler cbh)
        throws IOException, XMPPException {
    String[] mechanisms = { NAME };
    Map<String, String> props = new HashMap<String, String>();
    this.sc = Sasl.createSaslClient(mechanisms, null, "xmpp", host, props,
            cbh);
    authenticate();
}

@Override
protected String getName() {
    return NAME;
}

@Override
public void challengeReceived(String challenge) throws IOException {
    byte[] response = null;

    if (challenge != null) {
        String decodedChallenge = new String(Base64.decode(challenge));
        Map<String, String> parameters = getQueryMap(decodedChallenge);

        String version = "1.0";
        String nonce = parameters.get("nonce");
        String method = parameters.get("method");

        long callId = new GregorianCalendar().getTimeInMillis();

        String composedResponse = "api_key="
                + URLEncoder.encode(apiKey, "utf-8") + "&call_id=" + callId
                + "&method=" + URLEncoder.encode(method, "utf-8")
                + "&nonce=" + URLEncoder.encode(nonce, "utf-8")
                + "&access_token="
                + URLEncoder.encode(access_token, "utf-8") + "&v="
                + URLEncoder.encode(version, "utf-8");

        response = composedResponse.getBytes("utf-8");
    }

    String authenticationText = "";

    if (response != null) {
        authenticationText = Base64.encodeBytes(response,
                Base64.DONT_BREAK_LINES);
    }

    // Send the authentication to the server
    getSASLAuthentication().send(new Response(authenticationText));
}

private Map<String, String> getQueryMap(String query) {
    Map<String, String> map = new HashMap<String, String>();
    String[] params = query.split("\&");

    for (String param : params) {
        String[] fields = param.split("=", 2);
        map.put(fields[0], (fields.length > 1 ? fields[1] : null));
    }

    return map;
}
}

我创建了 ChatManager 类

I created ChatManager class

import org.jivesoftware.smack.Chat;
import org.jivesoftware.smack.ChatManagerListener;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.MessageListener;
import org.jivesoftware.smack.Roster;
import org.jivesoftware.smack.RosterListener;
import org.jivesoftware.smack.SASLAuthentication;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.packet.Presence.Type;
import org.jivesoftware.smackx.pubsub.PresenceState;

public class FacebookChatManager {

private static FacebookChatManager chatManager;
private XMPPConnection connection;
private final String SERVER = "chat.facebook.com";
private final int PORT = 5222;
private final String FACEBOOK_MECHANISM = "X-FACEBOOK-PLATFORM";
private RosterListener rosterListner;

private FacebookChatManager(RosterListener rosterListner)
{
    this.rosterListner = rosterListner;
    ConnectionConfiguration connFig = new ConnectionConfiguration(SERVER,
            PORT);
    connFig.setSASLAuthenticationEnabled(true);
    connection = new XMPPConnection(connFig);
    //setup facebook authentication mechanism
    SASLAuthentication.registerSASLMechanism(FACEBOOK_MECHANISM,
            SASLXFacebookPlatformMecha.class);
    SASLAuthentication.supportSASLMechanism(FACEBOOK_MECHANISM, 0);
}

public static FacebookChatManager getInstance(RosterListener rosterListner)
{
    if(chatManager == null)
    {
        chatManager =  new FacebookChatManager(rosterListner);
    }
    return chatManager;
}

public boolean connect()
{
    try {
        connection.connect();
        return true;
    } catch (XMPPException e) {
        e.printStackTrace();
        connection.disconnect();
    }
    return false;
}

public void disConnect()
{
    connection.disconnect();
}

public boolean logIn(String apiKey, String accessToken)
{
    try {
        connection.login(apiKey, accessToken);
        setPresenceState(Presence.Type.available, "");
        connection.getRoster().addRosterListener(rosterListner);
        return true;
    } catch (XMPPException e) {
        connection.disconnect();
        e.printStackTrace();
    }
    return false;
}

public Roster getRoster()
{
    return connection.getRoster();
}

public Chat createNewChat(String user, MessageListener messageListner)
{
    return connection.getChatManager().createChat(user, messageListner);
}

public void registerNewIncomingChatListner(ChatManagerListener chatManagerListner)
{
    connection.getChatManager().addChatListener(chatManagerListner);
}

public void setPresenceState(Type precenseType, String status)
{
    Presence presence = new Presence(precenseType);
    presence.setStatus(status);
    connection.sendPacket(presence);
}

public Presence getUserPresence(String userId)
{
    return connection.getRoster().getPresence(userId);
}
}

在使用 FacebookChatManager 类的最后，请注意 rosterListnr 用于获取有关您朋友状态更改的信息，根据需要实现一个

at the end to use that FacebookChatManager class note that rosterListnr is used to get info about your friends state change implement one as you want

FacebookChatManager facebookChatManager = FacebookChatManager.getInstance(rosterListner);

if (facebookChatManager.connect()) {
            if (facebookChatManager.logIn(FacebookActivity.APP_ID,
                    access_token)) {
                return facebookChatManager.getRoster();
            }
        }