MyFirebaseInstanceIDService.java 中的 FirebaseInstanceId.getInstance().getToken() 未出现在日志中答案

【问题标题】：FirebaseInstanceId.getInstance().getToken() in MyFirebaseInstanceIDService.java not appearning in the logMyFirebaseInstanceIDService.java 中的 FirebaseInstanceId.getInstance().getToken() 未出现在日志中
【发布时间】：2018-05-10 23:38:59
【问题描述】：

我正在按照https://firebase.google.com/docs/cloud-messaging/android/client 的说明在 Android 上设置 Firebase 云消息传递客户端应用程序。我已经编辑了我的应用清单以包含 MyFirebaseMessagingService 和 MyFirebaseInstanceIDService 服务。我现在正在尝试访问设备注册令牌。这是我的MyFirebaseInstanceIDService.java文件的内容（代码取自https://github.com/firebase/quickstart-android/blob/master/messaging/app/src/main/java/com/google/firebase/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.
    }
}

由于我使用的是Log.d(TAG, "Refreshed token: " + refreshedToken);，我希望在 Android Studio 的 Android 监视器中看到令牌，但我看不到它。你知道我需要做什么才能调用onTokenRefresh() 方法以便执行FirebaseInstanceId.getInstance().getToken() 并生成令牌吗？谢谢。

【问题讨论】：

标签： android push-notification firebase-cloud-messaging android-push-notification

【解决方案1】：

我只需要在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 Monitor 中，我可以看到类似这样的内容：

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.

【讨论】：

【解决方案2】：

您是否在清单中注册了该服务？这通常会在使用 android studio 时自动发生，但请确保它存在，如 reference 中所述

【讨论】：

我按照firebase.google.com/docs/cloud-messaging/android/client 的说明进行操作，是的，我确实使用以下代码在我的清单中注册了MyFirebaseInstanceIDService：<service android:name="com.couponclub.MyFirebaseInstanceIDService"> <intent-filter> <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/> </intent-filter> </service>

【解决方案3】：

onTokenRefresh 仅在更新令牌时调用。您应该使用FirebaseInstanceId.getInstance().getInstanceId() 请求它。 FirebaseInstanceId.getInstance().getToken() 已被弃用并阻塞 - 所以，从 onCreate 调用它真的是个坏主意，因为它会引入挂在 main/ui 线程上

【讨论】：