session.isOpened（）返回false，即使成功登录到Facebook [英] session.isOpened() returns false even if successfully logged in to Facebook

问题描述

我是Facebook +本机Android的新手。我乖乖地按照他们网站上的步骤，但是即使我使用Facebook登录，我仍然继续在session.isOpened（）方法中收到false结果。我相信我已经正确设置了哈希键，程序包名称和类名。你能帮我一下这段代码中的问题吗？

  public class MainActivity extends Activity {
 
 @Override 
 public void onCreate（Bundle savedInstanceState）{
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
 
 //开始Facebook登录
 Session.openActiveSession（this，true，new Session.StatusCallback（）{
 
 //当会话更改状态$ b $时回调b @Override 
 public void call（Session session，SessionState state，Exception exception）{
 
 if（session.isOpened（））{
 
 //请求到/ me API 
 Request.executeMeRequestAsync（session，new Request.GraphUserCallback（）{
 
 //在用户对象的Graph API响应后回调
 @Override 
 public void onCompleted（GraphUser user，Response response）{
 if（user！= null）{
 TextView welcome =（TextView）findViewById（R.id.welcome）; 
 welcome.setText Hello+ user.getName（）+！）; 
} 
} 
}）; 
} 
} 
}）; 
 
 
} 
 
 @Override 
 public void onActivityResult（int requestCode，int resultCode，Intent data）{
 super.onActivityResult（requestCode ，resultCode，data）; 
 Session.getActiveSession（）。onActivityResult（this，requestCode，resultCode，data）; 
} 
  

解决方案

解决这个问题。

我的Facebook应用程序设置中设置的错误的哈希键出现问题。

要正确生成哈希键，请使用java6，因为Facebook需要此版本。我尝试使用java7，但没有起作用。

请参阅下面的正确步骤，生成由 Vizzz

LINK

I am new to Facebook + native Android. I obediently followed the steps in their website but I keep on receiving "false" result in session.isOpened() method even if I successfully logged in using Facebook. I believe I have set correctly the hash key, package name and class name. Could you please help me what's the problem in this code?

public class MainActivity extends Activity {

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

    // start Facebook Login
    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.getName() + "!");
              }
            }
          });
        }
      }
    });


  }

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

解决方案

Yes, finally I was able to solve this.

The problem sprung from the incorrect hash key I set in my Facebook App Settings.

To correctly generate hash key, use java6 because Facebook requires this version. I tried using java7 but it didn't work.

Please see below the correct steps in generating hash key answered by Vizzz

LINK

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