Question

我按照Facebook上的登录身份验证教程，将以下代码复制到我的Android应用程序

private Session.StatusCallback callback = 
    new Session.StatusCallback()
{
    @Override
    public void call(Session session, 
            SessionState state, Exception exception) {
        onSessionStateChange(session, state, exception);
    }
};

然而，它给了我以下错误：

Session.StatusCallback cannot be resolved to a type

导致以下错误：

callback cannot be resolved to a variable

还有其他地方Facebook API调用会给我带来错误，但它并不是所有的Facebook API调用。另一个我收到错误的地方如下：

Request request = Request.newMeRequest(session, 
                    new Request.GraphUserCallback() {
                @Override
                public void onCompleted(GraphUser user, Response response) {
                    // If the response is successful
                    if (session == Session.getActiveSession()) {
                        if (user != null) {
                            // Set the id for the ProfilePictureView
                            // view that in turn displays the profile picture.
                            Log.d("MainActivity", "onComplete() User logged in");
                            parent.owner = MainKickback.userConnection.add(new User(user.getId()));

                            EventFragment e = (EventFragment) fragments[UPCOMING_EVENTS];
                            e.populateEvents();
                        }
                    }
                    if (response.getError() != null) {
                        // Handle errors, will do so later.
                    }
                }
            });
            request.executeAsync();

它不识别Request.GraphUserCallback，然后执行executeAsync（）。我收到以下错误：

Request.GraphUserCallback cannot be resolved to a type
The method executeAsync() is undefined for the type DownloadManager.Request

有没有人对如何解决这个问题有任何建议？

提前感谢您的帮助!!

Answer 1

我和你的第一个问题一样，我通过删除

解决了这个问题

import android.service.textservice.SpellCheckerService.Session;

并添加

import com.facebook.Session;

Answer 2

我有一个类似的问题，问题是我在文件中有这两个导入

import android.app.DownloadManager.Request;
import android.service.textservice.SpellCheckerService.Session;

那些请求和会话模块覆盖

com.facebook.Session
com.facebook.Request

我实际上刚删除了两个android导入，一切运行良好。它们似乎没有被使用，但是eclipse因为一些奇怪的原因加入了它们。

根据你的输出判断

The method executeAsync() is undefined for the type DownloadManager.Request

我说这听起来好像你在某处发生了相同的进口，而且它们正在压倒facebook的进口。

Answer 3

在已经导入Volley框架的Request和Session类时遇到此问题。尝试使用包含Session和Request包名的类，它对我有用。请参阅下面的代码。

private com.facebook.Session.StatusCallback callback = 
    new com.facebook.Session.StatusCallback()
{
    @Override
    public void call(com.facebook.Session session, 
            SessionState state, Exception exception) {
        onSessionStateChange(session, state, exception);
    }
};

Answer 4

对于您的第一个问题，您使用哪种导入？我将它用于回调：

import com.facebook.Session.StatusCallback;

您使用的是哪个Facebook SDK？最新的？我正在使用最新的sdk 4.01但是这个sdk不支持这个pakage

Answer 5

我收到一条消息：“无法解析符号会话”。所以，问题出在非插件库“facebook”。我解决了这个问题。 1.打开项目结构（文件＆gt;项目结构）。 2.在左窗格中选择“模块”。 3.选择您的项目名称。 4.单击“依赖关系”选项卡。 5.单击底部的加号。选择“模块依赖关系”，然后单击“Facebook”。 6.按“确定”，然后按“确定”。

Answer 6

package com.vishal.example;

import com.facebook.Response;
import com.facebook.UiLifecycleHelper;
import com.facebook.Response;
import com.facebook.UiLifecycleHelper;
import com.facebook.Session;
import com.facebook.SessionState;
import com.facebook.model.GraphUser;
import com.facebook.Request;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends Activity 
{
    private UiLifecycleHelper uiHelper;
    private View otherView;
    private static final String TAG = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Set View that should be visible after log-in invisible initially
        otherView = (View) findViewById(R.id.other_views);
        otherView.setVisibility(View.GONE);
        // To maintain FB Login session
        uiHelper = new UiLifecycleHelper(this, callback);
        uiHelper.onCreate(savedInstanceState);
   }

   // Called when session changes
   private Session.StatusCallback callback = new Session.StatusCallback()
   {
       @Override
       public void call(Session session, SessionState state, Exception exception) 
       {
           onSessionStateChange(session, state, exception);
       }
   };

   // When session is changed, this method is called from callback method
    private void onSessionStateChange(Session session, SessionState state, Exception exception)
    {
         final TextView name = (TextView) findViewById(R.id.name);
         final TextView gender = (TextView) findViewById(R.id.gender);
         final TextView location = (TextView) findViewById(R.id.location);
         // When Session is successfully opened (User logged-in)
         if (state.isOpened())
         {
             Log.i(TAG, "Logged in...");
             // make request to the /me API to get Graph user
             Request.newMeRequest(session, new Request.GraphUserCallback() 
             {
                 // callback after Graph API response with user
                 @Override
                 public void onCompleted(GraphUser user, Response response)
                 {
                     if (user != null)
                     {
                         // Set view visibility to true
                        otherView.setVisibility(View.VISIBLE);
                        // Set User name 
                        name.setText("Hello " + user.getName());
                        // Set Gender
                        gender.setText("Your Gender: " + user.getProperty("gender").toString());
                        location.setText("Your Current Location: " + user.getLocation().getProperty("name").toString());
                     }
                }
            }).executeAsync();
         }
         else if(state.isClosed())
         {
             Log.i(TAG, "Logged out...");
             otherView.setVisibility(View.GONE);
         }
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
        uiHelper.onActivityResult(requestCode, resultCode, data);
        Log.i(TAG, "OnActivityResult...");
    }

    @Override
    public void onResume()
    {
        super.onResume();
        uiHelper.onResume();
    }

    @Override
    public void onPause()
    {
        super.onPause();
        uiHelper.onPause();
    }

    @Override
    public void onDestroy()
    {
        super.onDestroy();
        uiHelper.onDestroy();
    }

    @Override
    public void onSaveInstanceState(Bundle outState)
    {
        super.onSaveInstanceState(outState);
        uiHelper.onSaveInstanceState(outState);
    }
}

facebook sdk的参考链接，您可以下载并使用它。它为我工作 http://www.filedropper.com/facebooksdk

Answer 7

只需删除FB SDK并重新下载即可。您的SDK可能会被推送到git的其他人破坏。

Session.StatusCallback无法解析为某种类型--Facebook API

7 个答案: