在Android中,如果设备中已经安装了Facebook,为什么Facebook注册不起作用?

我已尝试在应用程序中使用Facebook,这在未安装Facebook应用程序的设备上运行良好。但当设备上已经安装了Facebook时,这无法提供会话。

public void facebookSignIn(CallbackContext callContext){
    try {
        isFacebookLogin = true;
        getActivity().runOnUiThread(new Runnable() {
            public void run() {
                mConnectionProgressDialog.show();               }
        });
        this.callbackContext = callContext;
        Session.openActiveSession(this, true, new Session.StatusCallback() {
            // callback when session changes state
            @Override
            public void call(Session session, SessionState state, Exception exception) {
                Log.d("facebook","session open");
                if (session.isOpened()) {
                    // make request to the /me API
                    Request.newMeRequest(session, new Request.GraphUserCallback() {
                        // callback after Graph API response with user object
                        @Override
                        public void onCompleted(GraphUser user, Response response) {
                            if (user != null) {
                                String userID = user.getId();
                                callbackContext.success(userID);
                                Toast.makeText(MDLIVEMain.this, user.getName() + " is connected.", Toast.LENGTH_LONG).show();
                            } else {
                                // TODO: handle exception
                                callbackContext.error(MDLiveLocalizationSystem.localizedStringForKey("nat_authen_failure"));
                            }
                            getActivity().runOnUiThread(new Runnable() {
                                public void run() {
                                    mConnectionProgressDialog.dismiss();
                                }
                            });
                        }

                    }).executeAsync();
                }
            }
        });
    }catch (Exception e){
        e.printStackTrace();
        callbackContext.error(MDLiveLocalizationSystem.localizedStringForKey("nat_authen_failure"));
        GATrackingExceptions.trackExceptions(e.getLocalizedMessage(), MDLIVEMain.this);
        getActivity().runOnUiThread(new Runnable() {
            public void run() {
                mConnectionProgressDialog.dismiss();
            }
        });
    }
}

这是一个activityResult代码

  @Override
protected void onActivityResult(int requestCode, int responseCode, Intent intent) {
    try {
        CordovaPlugin callback = this.activityResultCallbacks;
        if (callback != null) {
            callback.onActivityResult(requestCode, responseCode, intent);
        }
        Log.d("isFacebookLogin",isFacebookLogin+"");
        if(isFacebookLogin){
            try {
                isFacebookLogin = false;
                Session.getActiveSession().onActivityResult(this, requestCode, responseCode, intent);
            }catch (Exception e){
                e.printStackTrace();
            }
        }else {
            if (requestCode == REQUEST_CODE_RESOLVE_ERR && responseCode == RESULT_OK) {
                mConnectionResult = null;
                mPlusClient.connect();
            }

            getActivity().runOnUiThread(new Runnable() {
                public void run() {
                    mConnectionProgressDialog.dismiss();
                }
            });

            if (requestCode == PASSCODE_RESULT_PAGE) {
                if (responseCode == RESULT_OK) {
                    activityVisible = true;
                    this.callbackContext.success(intent.getExtras().getString("passcode_pin"));
                } else {
                    this.callbackContext.success(intent.getExtras().getString("passcode_pin"));
                    isFromPasscodePage = true;
                }
            }
        }
    }catch (Exception e){
        e.printStackTrace();
    }
}