活动的Facebook登录失败？

Question

我在一个活动中有一个自定义按钮，用于允许用户通过Facebook登录。 我的点击代码如下所示：

    CallbackManager callback = CallbackManager.Factory.create();
    List<String> permissions = Arrays.asList("email","public_profile");
    LoginManager.getInstance().logInWithReadPermissions(this,permissions);
    LoginManager.getInstance().registerCallback(callback, new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            setUserLoggedIn(PrefUtils.Values.LOG_IN_METHOD_FACEBOOK);
        }

        @Override
        public void onCancel() {
            // todo: something
        }

        @Override
        public void onError(FacebookException error) {
            Logger.d("TAG",error.getMessage());
        }
    });  

但是，不会显示FB登录对话框。 相反，我最终看到一个错误对话框，要求我登录。 我以为这将启动显示用户名和密码编辑文本的对话框。

如何获得该登录对话框？

Answer 1

单击自定义fb按钮打开fb_login对话框

fb_login_button.performClick();

Answer 2

事实证明，文档中没有提到一小步。 从调试密钥库计算完哈希后，您必须在开发人员资料中单击“添加平台”，然后选择“ Android”并按照屏幕上的说明进行操作。

Answer 3

将其放在按钮上，单击onClick（）方法

Fblogin.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View view) {


               LoginManager.getInstance().logInWithReadPermissions(context,

            Arrays.asList("email", "user_photos", "public_profile"));
    }
});



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

Answer 4

将您的回调设为全局变量，即在您的以下将其初始化

        FacebookSdk.sdkInitialize(getApplicationContext());

还要重写您的活动的OnActivityForResult方法，并按如下所示添加callback.onActivityResult（requestCode，resultCode，data）。

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

希望这可以帮助。 如果没有让我知道。

Answer 5

做这个步骤

1. 在开始时声明此变量

   公共CallbackManager callbackManager;

2. 呼叫波纹管功能

   私人无效initializeFacebookSdk（）{

     FacebookSdk.sdkInitialize(getApplicationContext()); callbackManager = CallbackManager.Factory.create(); } 

3. 在按钮上单击调用此功能

   受保护的void connectToFacebook（）{

     LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("email", "user_photos", "user_friends", "public_profile", "user_birthday")); LoginManager.getInstance().registerCallback(callbackManager, new FacebookCallback<LoginResult>() { @Override public void onSuccess(final LoginResult loginResult) { // App code GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() { @Override public void onCompleted(JSONObject json, GraphResponse response) { Log.v("FaceBook Response :", response.toString()); } }); Bundle parameters = new Bundle(); parameters.putString("fields", "id,name,first_name,last_name,gender, birthday,email,link,picture"); request.setParameters(parameters); request.executeAsync(); } @Override public void onCancel() { Log.v("LoginActivity", "cancel"); } @Override public void onError(FacebookException exception) { Utils.showToast(mActivity, "" + exception); } }); } 

Answer 6

在这里，我正在分享我的工作代码。 希望对您有帮助。

在您的应用程序类内部oncreate

 FacebookSdk.sdkInitialize(getApplicationContext());

然后将facebook LoginButton放入您的布局，并将其可见性设置为“消失”。 然后在自定义按钮的onclick中编写以下代码：

btnFBLogin.performClick(); //btnFBLogin is the Facebook LoginButton.

初始化LoginButton后不要忘记添加此内容

btnLoginFB.setReadPermissions(Arrays.asList("email", "user_birthday"));  

并在初始化callbackmanager之后在oncreate中调用此函数。

callbackManager = CallbackManager.Factory.create();
registerfb_callback();

这是registerfb_callback（）函数

 /*Registering fb callback*/
private void registerfb_callback(){

    btnLoginFB.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {

        @Override
        public void onSuccess(LoginResult loginResult) {

            showProgressDialog(); //Show dialog as your wish

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

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

                @Override
                public void onCompleted(JSONObject object, GraphResponse response) {

        //Here I am logging out after completing the call.
                    LoginManager.getInstance().logOut();

                    progressDialog.hide();

                    try {
                        if(object != null) {

                            System.out.println("GraphResponse" + response.toString());
                            System.out.println("JSONObjectResponse" + object.toString());
                            Log.i("Activity", response.toString());

                            // Get facebook data from login
                            Bundle bFacebookData = getFacebookData(object);



                        }
                    }catch (Exception e){                     
                        e.printStackTrace();
                    }

                }


            });

            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() {
            System.out.println("onCancel");
        }

        @Override
        public void onError(FacebookException exception) {
            Toast.makeText(Registration.this,"Network Error! Please try again!",Toast.LENGTH_LONG).show();

            System.out.println("onError"+exception.toString());
        }


    });

}

从JSON对象获取解析的数据

/*Parsing facebook data from JSON Object*/
private Bundle getFacebookData(JSONObject object) {
    Bundle bundle = new Bundle();
    try {

        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 bundle;
}

最后是onActivityResult

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

希望它会有所帮助:)