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当用户单击按钮时，我需要一些代码来自动更新用户的 facebook 状态 [已经提到的字符串值]！我正在使用 facebook sdk3.6.0。

万事俱备，出发！！我有两个 java 类，一个用于主菜单 [Main.java，其中包括按钮]，另一个在选项菜单 [FbConnect.java- 用户可以在其中连接到 facebook，令牌将保存到共享偏好]。现在的事情是，首先用户进入选项菜单并单击 FbConnect.java 菜单项并连接到 facebook，然后返回主菜单。当用户点击主菜单中的按钮时，状态消息必须自动更新到 Facebook，无需重新登录或执行任何操作！

如何将 access_token 和相关值获取到主菜单？

用正确的android代码帮助我！

我的 FbConnect.java 类。

package com.alvin.hii;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import com.facebook.*;
import com.facebook.android.DialogError;
import com.facebook.android.Facebook;
import com.facebook.android.Facebook.DialogListener;
import com.facebook.android.FacebookError;
import com.facebook.model.*;

public class FbConnect extends Activity {
    private Facebook facebook;
    private String messageToPost;
    private static final String APP_ID = "my_appid";
    private static final String[] PERMISSIONS = new String[] { "publish_stream" };
    private static final String TOKEN = "access_token";
    private static final String EXPIRES = "expires_in";
    private static final String KEY = "facebook-credentials";


      @Override
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.facebook);

        facebook = new Facebook(APP_ID);
        restoreCredentials(facebook);

        Session.openActiveSession(this, true, new Session.StatusCallback() {

            // callback when session changes state
            @Override
            public void call(Session session, SessionState state, Exception exception) {
              if (session.isOpened()) {

                // make request to the /me API
                Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {

                  // callback after Graph API response with user object
                  @Override
                  public void onCompleted(GraphUser user, Response response) {
                    if (user != null) {
                      TextView welcome = (TextView) findViewById(R.id.welcome);
                      welcome.setText("Hello " +user +"!");
                    }
                  }
                });
              }
            }
          });
        }

        @Override
        public void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
        }






    public boolean saveCredentials(Facebook facebook) {
        Editor editor = getApplicationContext().getSharedPreferences(KEY, Context.MODE_PRIVATE).edit();
        editor.putString(TOKEN, facebook.getAccessToken());
        editor.putLong(EXPIRES, facebook.getAccessExpires());
        return editor.commit();
    }

    public boolean restoreCredentials(Facebook facebook) {
        SharedPreferences sharedPreferences = getApplicationContext().getSharedPreferences(KEY, Context.MODE_PRIVATE);
        facebook.setAccessToken(sharedPreferences.getString(TOKEN, null));
        facebook.setAccessExpires(sharedPreferences.getLong(EXPIRES, 0));
        return facebook.isSessionValid();
    }





    class LoginDialogListener implements DialogListener {
        public void onComplete(Bundle values) {
            saveCredentials(facebook);

        }

        public void onFacebookError(FacebookError error) {
            showToast("Authentication with Facebook failed!");
        }

        public void onError(DialogError error) {
            showToast("Authentication with Facebook failed!");
        }

        public void onCancel() {
            showToast("Authentication with Facebook cancelled!");
        }
    }

    private void showToast(String message) {
        Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT)
                    .show();
    }
}

我的 Main.java 类

package com.alvin.hii;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class Main extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);



        Button hee = (Button) findViewById(R.id.button1);
        hee.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {





facebook.authorize(this, new String[]{"publish_stream"}, new DialogListener(){

        @Override
        public void onComplete(Bundle values) {
            updateStatus(values.getString(Facebook.TOKEN));
        }

        @Override
        public void onFacebookError(FacebookError e) {
            Log.d("FACEBOOK ERROR","FB ERROR. MSG: "+e.getMessage()+", CAUSE: "+e.getCause());
        }

        @Override
        public void onError(DialogError e) {
            Log.e("ERROR","AUTH ERROR. MSG: "+e.getMessage()+", CAUSE: "+e.getCause());
        }

        @Override
        public void onCancel() {
            Log.d("CANCELLED","AUTH CANCELLED");
        }
    });



//updating Status
public void updateStatus(String accessToken){
    try {
        Bundle bundle = new Bundle();
        bundle.putString("message", "test update");
        bundle.putString(Facebook.TOKEN,accessToken);
        String response = facebook.request("me/feed",bundle,"POST");
        Log.d("UPDATE RESPONSE",""+response);
    } catch (MalformedURLException e) {
        Log.e("MALFORMED URL",""+e.getMessage());
    } catch (IOException e) {
        Log.e("IOEX",""+e.getMessage());
    }
}

}









@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // TODO Auto-generated method stub
       MenuInflater inflator = getMenuInflater();
       inflator.inflate(R.menu.my_menu, menu);
    return true;
}

   @Override
public boolean onOptionsItemSelected(MenuItem item) {
    // TODO Auto-generated method stub
       if(item.getItemId() == R.id.fb)
       {
           Intent fb = new Intent(Main.this, FbConnect.class);
           startActivity(fb);
       }
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