java - 从 Android 更新 Facebook

Question

我运行了以下脚本并且运行良好。我想知道的是。如果我不必实现它，为什么 facebook 会给我一个 key ，因为我没有在下面这样做。

    Facebook facebook = new Facebook("APP_ID"); // Application ID of your app at facebook
    boolean isLoggedIn = false;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);


        //Implementing SSO
        facebook.authorize(this, new String[]{"publish_stream"}, new DialogListener(){

            @Override
            public void onComplete(Bundle values) {
                //control comes here if the login was successful
//              Facebook.TOKEN is the key by which the value of access token is stored in the Bundle called 'values'
                Log.d("COMPLETE","AUTH COMPLETE. VALUES: "+values.size());
                Log.d("AUTH TOKEN","== "+values.getString(Facebook.TOKEN));
                updateStatus(values.getString(Facebook.TOKEN));
            }

            @Override
            public void onFacebookError(FacebookError e) {
                Log.d("FACEBOOK ERROR","FB ERROR. MSG: "+e.getMessage()+", CAUSE: "+e.getCause());
            }

            @Override
            public void onError(DialogError e) {
                Log.e("ERROR","AUTH ERROR. MSG: "+e.getMessage()+", CAUSE: "+e.getCause());
            }

            @Override
            public void onCancel() {
                Log.d("CANCELLED","AUTH CANCELLED");
            }
        });
    }

    //updating Status
    public void updateStatus(String accessToken){
        try {
            Bundle bundle = new Bundle();
            bundle.putString("message", "test update"); //'message' tells facebook that you're updating your status
            bundle.putString(Facebook.TOKEN,accessToken);
            //tells facebook that you're performing this action on the authenticated users wall, thus 
//          it becomes an update. POST tells that the method being used is POST
            String response = facebook.request("me/feed",bundle,"POST");
            Log.d("UPDATE RESPONSE",""+response);
        } catch (MalformedURLException e) {
            Log.e("MALFORMED URL",""+e.getMessage());
        } catch (IOException e) {
            Log.e("IOEX",""+e.getMessage());
        }
    }

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

        Log.d("onActivityResult","onActivityResult");
        facebook.authorizeCallback(requestCode, resultCode, data);
    }

Answer 1

最可能的原因是您已经登录此应用程序，或者之前已使用 Facebook 应用程序登录，因此 Facebook 已为您分配了一个访问 token - 在应用程序明确签署之前该 token 一直有效关闭，或者用户禁用应用程序访问(在 Facebook 服务器端用户配置文件中)。

因此，当您进行授权时，底层 Facebook SDK 只需检索访问 token ，您无需登录。

您可以通过为您的用户转到 Facebook 并进行帐户设置(右上角的下拉菜单)，然后进行应用程序(在左侧)并禁用您的应用程序的访问来禁用访问 token 。此时，当您下次运行您的应用时，用户将必须登录 Facebook 并授权您的应用。