android - GCM registrationId 稀有字符

Question

我在我的 Android 应用程序中使用类 com.google.android.gcm.GCMBaseIntentService及其方法onRegistered(Context context, String registrationId) .

最近这个方法开始获取registrationId的值，开头是一个稀有的字符串，比如|ID|1|: dSyzRPhBqSg: ，后跟正确的 GCM id。

我不知道这是什么原因。可能是最近开始使用Firebase SDK的缘故。

有什么想法吗？

谢谢

编辑:onRegistered 的代码

@Override
protected void onRegistered(final Context context, String registrationId) {
    Log.i(TAG, "Device registered: regId = " + registrationId);
}

Answer 1

这称为规范 ID。在 Firebase 文档中说:

A canonical registration ID is the registration token of the last registration requested by the client app . This is the ID that the server should use when sending messages to the device.

If you try to send a message using an old registration token, GCM will process the request as usual, but it will include the canonical ID in the registration_id field of the response. Make sure to replace the registration token stored in your server with this canonical ID, as eventually the old registration token will stop working.

这是因为客户端应用会触发同一设备的多次注册。