myFireBaseInstanceIdService.java中未出现在日志中的firbaseInstance.get

Question

我在https://firebase.google.com/docs/cloud-messaging/android/client上按照说明进行了指示，以在Android上设置Firebase Cloud Messaging Client App。我已经编辑了我的应用程序的清单，以包括MyFireBaseMessagingService和MyFireBaseInstanceIdService服务。我正在尝试访问设备注册令牌。这是我的MyFirebaseInstanceIDService.java文件的内容（代码从https://github.com/firebase/quickstart-android/quickstart-android/blob/master/message/messagg/papp/src/src/main/java/java/java/google/google/firebase/firebase/quickstart/quickstart/fcm/myFireBaseInstanceIdService.java）：

/**
 * Copyright 2016 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.[myapp];
import android.util.Log;
import com.google.firebase.iid.FirebaseInstanceId;
import com.google.firebase.iid.FirebaseInstanceIdService;
public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
    private static final String TAG = "MyFirebaseIIDService";
    /**
     * Called if InstanceID token is updated. This may occur if the security of
     * the previous token had been compromised. Note that this is called when the InstanceID token
     * is initially generated so this is where you would retrieve the token.
     */
    // [START refresh_token]
    @Override
    public void onTokenRefresh() {
        // Get updated InstanceID token.
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
        Log.d(TAG, "Refreshed token: " + refreshedToken);
        // If you want to send messages to this application instance or
        // manage this apps subscriptions on the server side, send the
        // Instance ID token to your app server.
        sendRegistrationToServer(refreshedToken);
        // TODO: Implement this method to send any registration to your app's servers.
        System.out.println("Registration.onTokenRefresh TOKEN: " + refreshedToken );
    }
    // [END refresh_token]
    /**
     * Persist token to third-party servers.
     *
     * Modify this method to associate the user's FCM InstanceID token with any server-side account
     * maintained by your application.
     *
     * @param token The new token.
     */
    private void sendRegistrationToServer(String token) {
        // TODO: Implement this method to send token to your app server.
    }
}

由于我正在使用Log.d(TAG, "Refreshed token: " + refreshedToken);，因此我希望从Android Studio中的Android显示器中看到令牌，但我看不到它。您知道我需要做什么，以使onTokenRefresh()方法被调用，以便执行FirebaseInstanceId.getInstance().getToken()并可以生成令牌？谢谢。

Answer 1

您是否在清单中注册了该服务？通常，当使用Android Studio时，这通常会自动发生，但请确保它在参考文献

Answer 2

onTokenRefresh仅在更新令牌时才调用。您应该使用FirebaseInstanceId.getInstance().getInstanceId()请求它。FirebaseInstanceId.getInstance().getToken()被弃用并阻止 - 因此，从onCreate调用它真的是坏主意，因为它将引入挂在主/UI线程上

我只需要从我的应用的第一个活动中使用它：

@Override
protected void onCreate(Bundle savedInstanceState) {
    // Get token
    String token = FirebaseInstanceId.getInstance().getToken();
    System.out.println("Token obtained from [MyFirstActivity].java: "+token+" Token received successfully.");
}

在Android显示器中，我可以看到与此类似的东西：

11-27 11:08:49.213 10730-10730/com.[myapp] I/System.out: Token obtained from [MyFirstActivity].java: f95EVa9yfbo:APA91bFm56ZuQLWYSDDgPlkf4a88Lu6Gp4DoXVDJ5dRIlnjDncq0UdNnlSi7wxbbut6YX7Z1kmvyS3bzk_Zrl-1doHCw5XFeOXTthNzo4sXASWqQjHdfuA3pH3Js4wlbf_CnRkw5Mzao Token received successfully.