撤消个别权限后更新会话

I'm trying to give users an option to set/revoke publishing permission via checkbox (Facebook SDK for Android). Code is provided below. Everything works fine except that after revoking the code responsible for checking publishing permissions fails miserably.

我试图通过复选框(Facebook SDK for Android)为用户提供设置/撤销发布权限的选项。代码如下。一切正常,除了在撤销负责检查发布权限的代码失败后。

I understand that Session has no way of knowing if user has revoked any permissions after loggin in. What is the correct way to handle this kind of situation? Do I have to query available permissions manually, or is there a way to seamlessly recreate session with basic permissions?

我知道Session无法知道用户是否在登录后撤消了任何权限。处理这种情况的正确方法是什么?我是否必须手动查询可用权限,或者是否有办法使用基本权限无缝重新创建会话?

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    ...
    publishCheckbox = (CheckBox) view.findViewById(R.id.publishCheckbox);
        publishCheckbox.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View v) {
                CheckBox chb = (CheckBox) v;
                if (chb.isChecked() && checkForPublishPermission() == false){
                    requestPublishPermissions();                            
                }
                else{
                    removePublishPermissions();
                }   

            }

        });
    ...
}

private void requestPublishPermissions() {
    Session session = Session.getActiveSession();
    if ( session!= null && session.isOpened()){
        Session.NewPermissionsRequest newPermissionsRequest = new Session.NewPermissionsRequest(this, PERMISSIONS).setRequestCode(REAUTH_ACTIVITY_CODE);
        newPermissionsRequest.setCallback(callback);
        session.requestNewPublishPermissions(newPermissionsRequest);
    }               
}   

private void removePublishPermissions() {       
    Request r = new Request(Session.getActiveSession(), PUBLISH_ACTIONS_PERMISSION_PATH, null, HttpMethod.DELETE);
    r.setCallback(new Request.Callback() {

        @Override
        public void onCompleted(Response response) {
            publishCheckbox.setEnabled(true);                               
        }
    });
    r.executeAsync();
    publishCheckbox.setEnabled(false);
}

private boolean checkForPublishPermission(){
    boolean result = false;

    Session session = Session.getActiveSession();

    if (session == null || !session.isOpened()) {
        result = false;
    }
    else{
        List<String> permissions = session.getPermissions();
        if (permissions.containsAll(PERMISSIONS)) {
            result = true;
        }
    }       

    return(result);
}   

private void onSessionStateChange(Session session, SessionState state, Exception exception) {
    if (state.isOpened()) { 
        ...
        publishCheckbox.setChecked(checkForPublishPermission());
        ...
    } else if (state.isClosed()) {          
        ...                             
    }       
}

1 个解决方案

#1

Well I ended up requesting user permissions each time I needed such a check, something along these lines:

好吧,每次我需要这样的检查时,我最终都会请求用户权限,这些内容如下:

private void checkForPublishPermission(){
    mPublishCheckbox.setEnabled(false);
    Request r = new Request(Session.getActiveSession(), PUBLISH_ACTIONS_PERMISSION_PATH, null, HttpMethod.GET);
    r.setCallback(new Request.Callback() {

        @Override
        public void onCompleted(Response response) {
            if (response != null) {
                GraphObject o = response.getGraphObject();              
                    if ( o != null){
                        JSONArray data = o.getInnerJSONObject().optJSONArray("data");                       
                        mCanPublish = (data.optJSONObject(0).has("publish_actions"))?true:false;                            
                        mPublishCheckbox.setChecked(mCanPublish);                                                       
                    }
            }
            mPublishCheckbox.setEnabled(true);
        }
    });
    r.executeAsync();
}