如何通过http请求为Android设置动态图标反应本地Firebase

Question

[嗨，我正在尝试使用https://fcm.googleapis.com/fcm/send api通过http request.im设置自定义图标，并尝试发送通知，但我成功了，但问题是我无法定义自定义图标。它没有显示或正在显示默认的android图标。另外，如果我可以将base64字符串作为图标发送，那将很棒。我的代码如下：

{
"to": "dSqZ9U3IA3o:APA91bHR5XRI48k9AUOYR_W3-zxGU1IIffu7amhUtzbaad1ZIoVWrURLDkAZZA49_J_zWKQz7bWbzEckHbOTmonkyNmmRHjxk-mrDw5IDzU9weLF3Wfkghz4RJRQjv8RsSWFUMlHba2w",
  "notification" : {
    "title": "string",
    "body": "string",
    "icon": "https://cdn4.iconfinder.com/data/icons/ionicons/512/icon-camera-512.png",
    "color": "string",
    "sound": "string",
    "image": "https://cdn4.iconfinder.com/data/icons/ionicons/512/icon-camera-512.png"
  }
}

或

"icon":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAABEklEQVQ4T43TPyuHURjG8c+vlMUqm2xIkomMhEGieAPCIn8yKZKUyWIhYZBiUCZeALMMShayGWRRilBKp4560nkez1nPub/3ue7ruivKnQa0oQutqEUfXiol6sdRgzf0YAOXv3X/ARZwjVtMYfFvwyLAGjbxhD1M47MsYBRfOMUYbnCVkpv3g31M4Bu7mEl1D8AUoANNOEAjurGdN+wUYBDVOEEn2ssAQkF97DIU9V6gHy04i3f3eUMcQS8e4/C2ou91mMM7mrGKuywkK2EFh3hI6A2pC+k7KrKxCjsIycueIG0Sy2VsDHoHsJ55HGycxUcZQHiTDdE8zmOck07mBWkJz3jFcdHC5QHC9g3HoRYu7A9AKzMRgaU+zgAAAABJRU5ErkJggg=="

Answer 1

下载png文件并将文件放置在android / app / src / main / res / drawable中，作为notification_icon.png

显示时

{
"to": "dSqZ9U3IA3o:APA91bHR5XRI48k9AUOYR_W3-zxGU1IIffu7amhUtzbaad1ZIoVWrURLDkAZZA49_J_zWKQz7bWbzEckHbOTmonkyNmmRHjxk-mrDw5IDzU9weLF3Wfkghz4RJRQjv8RsSWFUMlHba2w",
  "notification" : {
    "title": "string",
    "body": "string",
    "icon": "notification_icon",
    "color": "string",
    "sound": "string",
    "image": "https://cdn4.iconfinder.com/data/icons/ionicons/512/icon-camera-512.png"
  }
}