使用自定义按钮登录 FACEBOOK

Question

我已经为 Facebook 登录实现了自定义按钮，一切都在发生，但我没有收到回电onSuccess，onCancel或者onError我可以得到返回的结果。

我用的是面子书SDK版com.facebook.android:facebook-android-sdk:4.1.0

下面是代码供参考

public class OnBoardingActivity extends AppCompatActivity {

    private final String TAG = OnBoardingActivity.class.getSimpleName();

    private final int TIME_DELAY = 2000;
    private CallbackManager mCallBackManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_onboarding);
        FacebookSdk.sdkInitialize(getApplicationContext());
        mCallBackManager = CallbackManager.Factory.create();

 final RelativeLayout facebookSignUp = (RelativeLayout)findViewById(R.id.facebook_signupButton);
        LoginManager.getInstance().registerCallback(mCallBackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                Log.d(TAG, " Login successfull +++  ");
            }

            @Override
            public void onCancel() {
                Log.d(TAG, " Login got canceled ");
            }

            @Override
            public void onError(FacebookException e) {
                Log.d(TAG, " Error in the login with exception is =  " + e);
            }
        });

           facebookSignUp.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                LoginManager.getInstance().logInWithReadPermissions(OnBoardingActivity.this, Arrays.asList("public_profile", "user_friends", "email"));
            }
        });

}

以下是 Facebook 登录的片段

<application>
  <!-- To use Facebook Login or Share below activity is declared -->
        <activity android:name="com.facebook.FacebookActivity"
            android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
            android:theme="@android:style/Theme.Translucent.NoTitleBar"
            android:label="@string/app_name" />

        <provider android:authorities="com.facebook.app.FacebookContentProvider1234"
            android:name="com.facebook.FacebookContentProvider"
            android:exported="true" />


        <meta-data
            android:name="com.facebook.sdk.ApplicationId"
            android:value="@string/facebook_app_id" />

    </application>

添加了 XML 布局 snipet

<RelativeLayout
            android:id="@+id/facebook_signupButton"
            android:layout_width="match_parent"
            android:layout_height="43dp"
            android:layout_marginTop="10dp"
            android:background="#3a569d">

            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_marginRight="15dip"
                android:layout_toLeftOf="@+id/login_with_facebook"
                android:scaleType="fitXY"
                android:src="@drawable/icon_facbook_small" />

            <TextView
                android:id="@+id/login_with_facebook"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:gravity="center"
                android:text="Login with facebook"
                android:textColor="@android:color/white" />

        </RelativeLayout>

Answer 1

为了让您的代码看起来更智能，您必须在设置布局之前先初始化 Facebook SDK

    FacebookSdk.sdkInitialize(getApplicationContext());

当使用单击按钮或在您的情况下布局调用方法执行整个功能

facebookSignUp.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Fblogin();
            }
        });

这里私有方法处理 Facebook 登录和回调

private void Fblogin()
{
    callbackmanager = CallbackManager.Factory.create();

    // Set permissions 
    LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("email","user_photos","public_profile"));

    LoginManager.getInstance().registerCallback(callbackmanager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {

                    System.out.println("Success");
                    GraphRequest.newMeRequest(
                            loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
                                @Override
                                public void onCompleted(JSONObject json, GraphResponse response) {
                                    if (response.getError() != null) {
                                        // handle error
                                        System.out.println("ERROR");
                                    } else {
                                        System.out.println("Success");
                                        try {

                                            String jsonresult = String.valueOf(json);
                                            System.out.println("JSON Result"+jsonresult);

                                            String str_email = json.getString("email");
                                            String str_id = json.getString("id");
                                            String str_firstname = json.getString("first_name");
                                            String str_lastname = json.getString("last_name");

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

                            }).executeAsync();

                }

                @Override
                public void onCancel() {
                    Log.d(TAG_CANCEL,"On cancel");
                }

                @Override
                public void onError(FacebookException error) { 
                    Log.d(TAG_ERROR,error.toString());
                }
    });
}

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

    callbackmanager.onActivityResult(requestCode, resultCode, data);
}

我为您提供完整的代码来解析您的 json 文件