android - onactivityresult facebook android sdk 3.0 中的数据始终为空

Question

经过大量调试后，我在过去 8 小时内一直遇到此错误，我发现通过 Intent 返回的数据在我的 onActivityResult 方法中为空。

这是我用来登录的代码。

signInWithFacebook(); 方法在我的 Activity 中通过按钮调用，

 Session mCurrentSession;
 SessionTracker mSessionTracker; 

 private void signInWithFacebook() {

    mSessionTracker = new SessionTracker(getBaseContext(), new StatusCallback() {

        @Override
        public void call(Session session, SessionState state, Exception exception) {
        }
    }, null, false);

    String applicationId = Utility.getMetadataApplicationId(getBaseContext());
    mCurrentSession = mSessionTracker.getSession();


    if (mCurrentSession == null || mCurrentSession.getState().isClosed()) {
        mSessionTracker.setSession(null);
        Session session = new Session.Builder(getBaseContext()).setApplicationId(applicationId).build();
        Session.setActiveSession(session);
        mCurrentSession = session;

        System.out.println("session closed or null"+mCurrentSession);
    }
    if (!mCurrentSession.isOpened()) {
        Session.OpenRequest openRequest = null;
        openRequest = new Session.OpenRequest(loginScreen.this);

        if (openRequest != null) {
            openRequest.setPermissions(Arrays.asList("user_birthday", "email", "user_location"));
            openRequest.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);
            mCurrentSession.openForRead(openRequest);
            //mCurrentSession.openForPublish(openRequest);
            System.out.println("1111");
        }
    }else {
        Request.executeMeRequestAsync(mCurrentSession, new Request.GraphUserCallback() {
              @Override
              public void onCompleted(GraphUser user, Response response) {

                    System.out.println("..reached here...");
                    String json=user.getInnerJSONObject().toString();

                    try {
                        JSONObject fbJson=new JSONObject(json);
                        Email=fbJson.getString("email");
                        Name=fbJson.getString("name");
                        Id=fbJson.getString("id");
                    } catch (JSONException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    System.out.println("22222");

                    if(mProgressDialog1!=null)
                    mProgressDialog1.dismiss();

                    DisplayrogressDialog("Signing in ");
                    new LoginThread(Email, "","facebook",Id).start();

                    /*Intent mIntent = new Intent(loginScreen.this, SelectCourseActivity.class);
                    mIntent.putExtra("fbid", Id);
                    mIntent.putExtra("fbemail", Email);
                    mIntent.putExtra("fbname", Name);
                    mIntent.putExtra("signupvia", "facebook");
                    mIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NO_HISTORY);
                    startActivity(mIntent);*/

              }
            });
    }
}

然后第一次调用 onActivityResult 方法时数据值为 null 但下次当我单击同一个按钮时它返回具有一些值的数据并且我能够登录，这不会发生在某些地方但是一些设备

public void onActivityResult(int requestCode, int resultCode, Intent data) {
              super.onActivityResult(requestCode, resultCode, data);

              if(mProgressDialog1!=null)
              mProgressDialog1.setMessage("Connecting to Studycopter...");

              else
              DisplayrogressDialogFB("Connecting to Studycopter...","Facebook"); 


              System.out.println(" value of getactive session "+Session.getActiveSession().getState()+" data "+ data);

              if(Session.getActiveSession().getState().equals("OPENING"))
              {
                  mCurrentSession=Session.openActiveSession(this);  
              }


              Session.getActiveSession().onActivityResult(loginScreen.this, requestCode, resultCode, data);


              mCurrentSession=Session.getActiveSession();

              if(mCurrentSession==null)
              {
                  mCurrentSession=Session.openActiveSession(this);
              } 


              if (mCurrentSession.isOpened()) {

                Request.executeMeRequestAsync(mCurrentSession, new Request.GraphUserCallback() {

                      @Override
                      public void onCompleted(GraphUser user, Response response) {

                            String json=user.getInnerJSONObject().toString();

                            try {
                                JSONObject fbJson=new JSONObject(json);
                                Email=fbJson.getString("email");
                                Name=fbJson.getString("name");
                                Id=fbJson.getString("id");
                            } catch (JSONException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }

                            new FbFurther().execute("");

                      }
                    });

                }
            }

Answer 1

请不要使用 SessionTracker。它位于 com.facebook.internal 包中，不适合外部使用。它可以随时更改或消失，而无需任何向后兼容性保证。只需使用 Session 类，您就应该能够完成所需的一切。

其次，您似乎正试图在 onActivityResult 方法中执行一些 session 管理逻辑。您应该将所有这些逻辑移动到 Session.StatusCallback 中，并且只将 onActivityResult 传递给 session ，例如:

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