android - 何时使用 Facebook 的新 Android SDK 3.0 请求权限？

Question

随着 Facebook 的新 Android SDK 3.0(几天前发布)，身份验证过程发生了变化。

那么如何请求“friends_hometown”等读取权限？

以下代码是我尝试的方式 - 但我很确定这不是你应该这样做的方式:

版本 1:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Session.openActiveSession(this, true, new Session.StatusCallback() { // start Facebook login
        @Override
        public void call(Session session, SessionState state, Exception exception) { // callback for session state changes
            if (session.isOpened()) {
                List<String> permissions = new ArrayList<String>();
                permissions.add("friends_hometown");
                session.requestNewReadPermissions(new Session.NewPermissionsRequest(FBImport.this, permissions));
                Request.executeGraphPathRequestAsync(session, "me/friends/?access_token="+session.getAccessToken()+"&fields=id,name,hometown", new Request.Callback() {
                    ...
                });
            }
        }
    });
}

版本 2:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Session currentSession = Session.getActiveSession();
    if (currentSession == null || currentSession.getState().isClosed()) {
        Session session = Session.openActiveSession(this, true, fbStatusCallback); // PROBLEM: NO PERMISSIONS YET BUT CALLBACK IS EXECUTED ON OPEN
        currentSession = session;
    }
    if (currentSession != null && !currentSession.isOpened()) {
        OpenRequest openRequest = new OpenRequest(this).setCallback(fbStatusCallback); // HERE IT IS OKAY TO EXECUTE THE CALLBACK BECAUSE WE'VE GOT THE PERMISSIONS
        if (openRequest != null) {
            openRequest.setDefaultAudience(SessionDefaultAudience.FRIENDS);
            openRequest.setPermissions(Arrays.asList("friends_hometown"));
            openRequest.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);
            currentSession.openForRead(openRequest);
        }
    }
}

我正在做的是在 session 打开后立即请求权限 - 但此时代码已经开始一个 Graph API 请求，因此权限请求来晚了......

您不能在初始化 session 的同时请求权限吗？

Answer 1

我能够让它工作。这是对您的第 2 版示例的修改。 link Jesse 也提供了很多帮助。

这是我在验证用户身份时运行的代码:

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;
    }

    if (!mCurrentSession.isOpened()) {
        Session.OpenRequest openRequest = null;
        openRequest = new Session.OpenRequest(SignUpChoices.this);

        if (openRequest != null) {
            openRequest.setDefaultAudience(SessionDefaultAudience.FRIENDS);
            openRequest.setPermissions(Arrays.asList("user_birthday", "email", "user_location"));
            openRequest.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);

            mCurrentSession.openForRead(openRequest);
        }
    }else {
        Request.executeMeRequestAsync(mCurrentSession, new Request.GraphUserCallback() {
              @Override
              public void onCompleted(GraphUser user, Response response) {
                  Log.w("myConsultant", user.getId() + " " + user.getName() + " " + user.getInnerJSONObject());
              }
            });
    }
}

为了测试，我在从 Facebook 身份验证返回后通过以下代码运行它:

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

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

          // callback after Graph API response with user object
          @Override
          public void onCompleted(GraphUser user, Response response) {
              Log.w("myConsultant", user.getId() + " " + user.getName() + " " + user.getInnerJSONObject());
          }
        });
    }
}