Question

我尝试将Facebook Android sdk从2.0升级到3.0，但我遇到了一个问题，这是我的情况：

我有一个webview，当用户点击“Facebook登录”时，我会执行以下代码：

SharedPreferences mPrefs = act.getPreferences(Context.MODE_PRIVATE);
String access_token =  mPrefs.getString("access_token", null);
session = Session.getActiveSession();
if (session == null){
     session = new Session(act.getApplicationContext());
     if(access_token != null){
          SharedPreferences.Editor editor = mPrefs.edit();
      editor.putString("access_token", null);
      editor.commit();
      AccessToken accessToken = AccessToken.createFromExistingAccessToken(access_token,null, null, null, null);
          session.open(accessToken, callback);
      Session.setActiveSession(session);
     }
}
Session.OpenRequest request = new Session.OpenRequest(act);
String[] permissions = {"email, user_likes, user_checkins, publish_checkins, publish_stream"};
request.setPermissions(Arrays.asList(permissions));
request.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);
request.setCallback(callback);
session.openForPublish(request);

并在同一个类（扩展Activity）上，我得到了这段代码：

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

当用户点击按钮时，一切正常：facebook对话框打开，需要权限，对话框关闭。问题是Session.getActiveSession（）返回null，而不是返回instanciated。详细说明，它会返回：

{who=null, request=64206, result=-1, data=Intent { (has extras) }}

Facebook Android sdk 3.0：活动结果的会话为空

0 个答案: