FCM for android:应用程序在后台时弹出系统通知

问题描述

是否可以在屏幕顶部显示 Firebase 系统通知的弹出窗口(当应用程序在后台时)?为此，我使用 setPriority(Notification.PRIORITY_MAX) 在前台显示来自 onMessageReceived 的通知.

Is it possible to show popup for firebase system notification (when app is in background) on the top of screen? I use setPriority(Notification.PRIORITY_MAX) for this to show notifications from onMessageReceived in foreground.

我同时使用 notification 和 data 字段，因此我无法访问前台收到的通知.我尝试将 priority 设置为 high 并使用仅通知推送 - 没有任何帮助.

I use both notification and data fields, so I don't have access to received notification in foreground. I've tried setting priority to high and using notification-only pushes - nothing helps.

推荐答案

只有当你的应用在后台使用dataonMessageReceived中的消息> 仅有效载荷.

It is only possible to handle the message in onMessageReceived when your app is in background when using a data only payload.

在您的有效负载中同时使用 notification 和 data 时，预期的行为是 Android 系统将在应用程序处于后台时处理通知，无论是什么priority 的值.

When using both notification and data in your payload, the expected behavior is that the Android System will handle the notification when the app is in background, regardless of what is the value of your priority.

有关更多信息，请参阅 处理 Android 消息 上的官方文档详情.

See the official docs on Handling Android Messages for more details.

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