Android Facebook 访问 token 为空

Question

我可以通过我的应用程序进行连接(我可以在我的在线个人资料首选项中看到已向该应用程序授予权限)。我通过应用程序登录，但是当我想获取我的访问 token 时，它返回为 null...

这是我的应用程序的 onCreate 方法:

@Override
public void onCreate() {
    super.onCreate();
    getFbKeyHash();
    FacebookSdk.sdkInitialize(getApplicationContext(), new FacebookSdk.InitializeCallback() {
        @Override
        public void onInitialized() {
            if(AccessToken.getCurrentAccessToken() == null){
                System.out.println("not logged in yet");
                isFBLogged = false;
            } else {
                isFBLogged = true;
                System.out.println("Logged in");
            }
        }
    });
    callbackManager = CallbackManager.Factory.create();
    AppEventsLogger.activateApp(this);
}

在我的 Activity 中，我使用这种方法:

LoginManager.getInstance().logInWithPublishPermissions(FacebookTest.this, Arrays.asList("publish_actions"));

这是我的 list 文件:

<?xml version="1.0" encoding="utf-8"?>

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

<application
    android:name=".MyApplication"
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <meta-data
        android:name="com.facebook.sdk.ApplicationId"
        android:value="@string/facebook_app_id" />
    <provider
        android:authorities="com.facebook.app.FacebookContentProvider"
        android:name="com.facebook.FacebookContentProvider"
        android:exported="true"/>

    <activity android:name=".Activity.FacebookTest">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".Activity.MainActivity" />
</application>

知道为什么我没有任何访问 token 吗？

Answer 1

检查这段代码:

public class MainActivity extends AppCompatActivity {


    private CallbackManager callbackManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        FacebookSdk.sdkInitialize(getApplicationContext());
        setContentView(R.layout.activity_main);

        LoginButton loginButton = (LoginButton) findViewById(R.id.login_button);
        loginButton.setReadPermissions(Arrays.asList("public_profile", "email",
                    "user_birthday"));



        callbackManager = CallbackManager.Factory.create();
        LoginManager.getInstance().registerCallback(callbackManager, callback);
    }

    FacebookCallback<LoginResult> callback = new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
           // success
        }

        @Override
        public void onCancel() {
            // cancel
        }

        @Override
        public void onError(FacebookException error) {
            // error
        }
    };



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