On April 10, 2018, Google deprecated GCM. The GCM server and client APIs were removed on May 29, 2019, and currently any calls to those APIs can be expected to fail.
Google 雲端通訊 (已於 2018 年 4 月 10 日淘汰) 已停用,並從 Google 的 API 中移除。如需對等功能,請使用 Firebase 雲端通訊 (FCM),以便沿用可靠且可擴充的 GCM 基礎架構及許多新功能。