问题描述

FCM 令牌何时到期?是6个月吗?

不过它不会过期.如果发生以下情况之一，它会自行更新.

根据 https://firebase.google.com/docs/cloud-消息传递/android/客户端:

1. -应用删除Instance ID
2. -应用在新设备上恢复
3. -用户卸载/重新安装应用程序
4. -用户清除应用数据.

<块引用>

监控令牌生成

每当生成新令牌时都会触发 onTokenRefreshcallback，因此在其上下文中调用 getToken 可确保您正在访问一个当前可用的注册令牌.确保您已添加服务到您的清单，然后在上下文中调用 getTokenonTokenRefresh，并记录如下所示的值:

@Override公共无效 onTokenRefresh() {//获取更新的 InstanceID 令牌.字符串 refreshedToken = FirebaseInstanceId.getInstance().getToken();Log.d(TAG, "刷新令牌:" + refreshedToken);//如果要向此应用程序实例发送消息或//在服务器端管理此应用订阅，发送//实例 ID 令牌到您的应用服务器.sendRegistrationToServer(refreshedToken);}

编辑

onTokenRefresh() 现在已弃用.onNewToken()<应该使用/a>.

When do FCM tokens expire? Is it at 6 months?

It doesn't expire though. It renews itself if one of the following happens.

According to https://firebase.google.com/docs/cloud-messaging/android/client:

1. -The app deletes Instance ID
2. -The app is restored on a new device
3. -The user uninstalls/reinstall the app
4. -The user clears app data.

Monitor token generation

The onTokenRefreshcallback fires whenever a new token is generated, so calling getToken in its context ensures that you are accessing a current, available registration token. Make sure you have added the service to your manifest, then call getToken in the context of onTokenRefresh, and log the value as shown:

@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);
}

EDIT

onTokenRefresh() is now deprecated. onNewToken() should be used instead.

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