instanceId和getIdToken有什么区别 [英] What's the difference between instanceId and getIdToken

问题描述

我不明白两者之间有什么区别

I don't understand what's the difference between:

FirebaseAuth.getInstance().currentUser.getIdToken(true).addOnSuccessListener {
    Log.d("tag",it.token) // token #1
} 



FirebaseInstanceId.getInstance().instanceId.addOnSuccessListener {
    Log.d("tag", it.token) //token #2
}

这两种方法都返回一些令牌，它们之间有什么区别?

Both of these methods return some token, what is the difference between them?

推荐答案

getIdToken(boolean forceRefresh)

为用户获取Firebase身份ID令牌；在针对自己的后端进行身份验证时非常有用.

Fetches a Firebase Auth ID Token for the user; useful when authenticating against your own backend.

getIdToken在类FirebaseUser中，当您使用自己的服务器时，您可以使用令牌对用户进行身份验证.

The getIdToken is in class FirebaseUser, you use the token to authenticate the user when you are using your own server.

getInstanceId()返回您下载的应用程序的ID，在FCM中也使用该ID，以便能够将通知发送到已下载该应用程序的特定手机.

getInstanceId() returns the id of the app that you downloaded, it is also used in FCM to be able to send notifications to a specific phone that has the app downloaded.

实例ID稳定，除了以下情况:

Instance ID is stable except when:

1. 应用程序删除实例ID
2. 应用已在新设备上还原
3. 用户卸载/重新安装应用程序
4. 用户清除应用数据

https://firebase.google.com/docs/reference/android/com/google/firebase/iid/FirebaseInstanceId.html#getInstanceId()

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