你想在通知栏中显示你的应用通知吗？如果是，你应该试试这个软件包flutter_local_notifications: ^16.3.0
as you can show on top of image

要在Flutter中创建通知，您需要awesome_notifications包
在您的主.dart文件中：

AwesomeNotifications().initialize(
  // set the icon to null if you want to use the default app icon
  null,
  [
    NotificationChannel(
      channelGroupKey: 'channel_group_key',
      channelKey: 'channel_key',
      channelName: 'channel_name',
      channelDescription: 'channel_description',
      importance: NotificationImportance.Max,
    )
  ],
  debug: true,
);

字符串
仅限Android初始化：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example">
  <uses-permission android:name="android.permission.USE_FULL_SCREEN_INTENT" />
  <application>
    ...
     <activity
       android:name=".MainActivity"
       android:showOnLockScreen="true"
       android:showWhenLocked="true"
       android:turnScreenOn="true">
       ...
     </activity>
   ...
  </application>
</manifest>

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注意事项：在iOS上，你需要请求通知权限。在Android 11上，你需要请求fullScreenIntent。下面是代码（将其放入initState（）或其他）：

AwesomeNotifications().isNotificationAllowed().then(
  (isAllowed) {
    //It would be more appropriate if you can show your own dialog
    //to the user before requesting the notifications permissons.
    if (!isAllowed) {
      AwesomeNotifications().requestPermissionToSendNotifications(
        permissions: [
          NotificationPermission.Alert,
          NotificationPermission.Sound,
          NotificationPermission.Badge,
          NotificationPermission.Vibration,
          NotificationPermission.Light,
          NotificationPermission.FullScreenIntent,
        ],
      );
    }
  }
);

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以及如何创建通知，把它每当你需要消防通知：

AwesomeNotifications().createNotification(
  content: NotificationContent(
    id: 10,
    channelKey: 'channel key' //Same as above in initilize,
    title: title,
    body: body,
    wakeUpScreen: true,
    fullScreenIntent: true,
    criticalAlert: true,
    //Other parameters
  ),
);

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