https://answer.freetools.me/tags/fcm/ Recent content in FCM on Answer Hugo -- 0.152.2 zh-cn Sun, 15 Mar 2026 01:42:17 +0800 https://answer.freetools.me/%E6%8E%A8%E9%80%81%E9%80%9A%E7%9F%A5%E4%B8%BA%E4%BD%95%E6%80%BB%E6%98%AF%E6%85%A2%E5%8D%8A%E6%8B%8D%E4%BB%8E%E6%8C%81%E4%B9%85%E8%BF%9E%E6%8E%A5%E5%88%B0%E5%8E%82%E5%95%86%E5%AE%9A%E5%88%B6%E7%9A%84%E4%BA%8C%E5%8D%81%E5%B9%B4%E6%8A%80%E6%9C%AF%E5%8D%9A%E5%BC%88/ Sun, 15 Mar 2026 01:42:17 +0800 https://answer.freetools.me/%E6%8E%A8%E9%80%81%E9%80%9A%E7%9F%A5%E4%B8%BA%E4%BD%95%E6%80%BB%E6%98%AF%E6%85%A2%E5%8D%8A%E6%8B%8D%E4%BB%8E%E6%8C%81%E4%B9%85%E8%BF%9E%E6%8E%A5%E5%88%B0%E5%8E%82%E5%95%86%E5%AE%9A%E5%88%B6%E7%9A%84%E4%BA%8C%E5%8D%81%E5%B9%B4%E6%8A%80%E6%9C%AF%E5%8D%9A%E5%BC%88/ 从2009年APNs诞生到现代Android Doze模式，深度解析推送通知延迟的六大技术根源。涵盖持久连接架构、消息优先级机制、OEM厂商定制限制、中国市场FCM屏蔽问题，以及从Token管理到优先级降级的完整优化策略。