使用 Facebook 登录我的应用程序：使用 Facebook 应用程序时出错

Question

Here is the Screenshot 使用 Facebook 凭据登录我的应用程序无法通过浏览器正常工作。但是通过 Facebook 应用程序登录时会出错。它不会自动重定向到我的应用程序，而是通过显示 "The page you requested cannot be displayed right now. It may be temporarily unavailable.....". 那样保留在 Facebook 中。提前致谢。这是我的登录活动：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
        FacebookSdk.sdkInitialize(getApplicationContext());
        setContentView(R.layout.activity_log);
        loginButton = (LoginButton) findViewById(R.id.login_button);
        loginButton.setReadPermissions("email");
        mail = (EditText) findViewById(R.id.log_mail);
        pass = (EditText) findViewById(R.id.log_pass);
        callbackManager = CallbackManager.Factory.create();


        accessTokenTracker = new AccessTokenTracker() {
            @Override
            protected void onCurrentAccessTokenChanged(
                    AccessToken oldAccessToken,
                    AccessToken currentAccessToken) {
                // Set the access token using
                // currentAccessToken when it's loaded or set.
            }
        };
        // If the access token is available already assign it.
        accessToken = AccessToken.getCurrentAccessToken();

        AppEventsLogger.activateApp(this);
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {

                Toast.makeText(getApplicationContext(), "Logged in with fb", Toast.LENGTH_SHORT).show();

                System.out.println("onSuccess");


                String accessToken = loginResult.getAccessToken().getToken();
                Log.i("", accessToken);

                GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {

                    @Override
                    public void onCompleted(JSONObject object, GraphResponse response) {
                        Log.i("LoginActivity", response.toString());
                        // Get facebook data from login
                        Bundle bFacebookData = getFacebookData(object);
                        mail_id= bFacebookData.getString("email");
                        prof_pic= bFacebookData.getString("profile_pic");
                        f_name=bFacebookData.getString("first_name");
                        l_name=bFacebookData.getString("last_name");
                        bFacebookData.putString("img",prof_pic);
                        bFacebookData.putString("mail_id",mail_id);
                        bFacebookData.putString("fname",f_name);
                        bFacebookData.putString("lname",l_name);


                        Intent i = new Intent(LogActivity.this, HomeActivity.class);
//
                            i.putExtras(bFacebookData);
                            startActivity(i);
                        //
                        Toast.makeText(getApplicationContext(),mail_id,Toast.LENGTH_LONG).show();



                    }
                });
                Bundle parameters = new Bundle();
                parameters.putString("fields", "id, first_name, last_name, email,gender, birthday, location"); // Parámetros que pedimos a facebook
                request.setParameters(parameters);
                request.executeAsync();

            }

            @Override
            public void onCancel() {
                Toast.makeText(getApplicationContext(), "Log in Cancelled..!!", Toast.LENGTH_SHORT).show();

            }

            @Override
            public void onError(FacebookException error) {
                Toast.makeText(getApplicationContext(), "Error in log in,error is : " + error, Toast.LENGTH_SHORT).show();

            }

        });


    }

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

    @Override
    public void onDestroy() {
        super.onDestroy();
        accessTokenTracker.stopTracking();
    }

    private Bundle getFacebookData(JSONObject object) {

        try {
            Bundle bundle = new Bundle();
            String id = object.getString("id");

            try {
                URL profile_pic = new URL("https://graph.facebook.com/" + id + "/picture?width=200&height=150");
                Log.i("profile_pic", profile_pic + "");
                bundle.putString("profile_pic", profile_pic.toString());

            } catch (MalformedURLException e) {
                e.printStackTrace();
                return null;
            }

            bundle.putString("idFacebook", id);
            if (object.has("first_name"))
                bundle.putString("first_name", object.getString("first_name"));
            if (object.has("last_name"))
                bundle.putString("last_name", object.getString("last_name"));
            if (object.has("email"))
                bundle.putString("email", object.getString("email"));
            if (object.has("gender"))
                bundle.putString("gender", object.getString("gender"));
            if (object.has("birthday"))
                bundle.putString("birthday", object.getString("birthday"));
            if (object.has("location"))
                bundle.putString("location", object.getJSONObject("location").getString("name"));
            return bundle;
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }

Answer 1

在基于模块的 gradle 文件中添加以下依赖项

compile 'com.facebook.android:facebook-android-sdk:4.7.0'

在 setContentView 之前初始化 facebook sdk

FacebookSdk.sdkInitialize(YourActivity.this);

在onCreate中添加如下代码：

  callbackManager = CallbackManager.Factory.create();
        LoginManager.getInstance().registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                if (CommonConstants.mDebug) Log.v(TAG, "onSuccess");

                final String accessToken = loginResult.getAccessToken().getToken();
                if (CommonConstants.mDebug) Log.v(TAG, accessToken);
                GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
                    @Override
                    public void onCompleted(JSONObject object, GraphResponse response) {

                    }
                });
                Bundle parameters = new Bundle();
                parameters.putString("fields", "id,first_name,last_name,email,gender, birthday");
                request.setParameters(parameters);
                request.executeAsync();
            }

            @Override
            public void onCancel() {
                if (CommonConstants.mDebug) Log.v(TAG, "onCancel");
                if (ViewDialog.kProgressHUD.isShowing()) {
                    ViewDialog.hideProgress();
                }
            }

            @Override
            public void onError(FacebookException error) {
                if (CommonConstants.mDebug) Log.v(TAG, error.toString());
            }
        });

在 onActivityResult 中添加以下内容：

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

Answer 2

因为我使用的是最新版本的 android-facebook-sdk，我更新了我的 phone 中的 facebook 应用程序，它解决了 issue.Thanks 每个人的 support.cheers!!

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