DART lang上的通知-Chrome打包的应用 [英] Notification at DART lang - Chrome Packaged App

问题描述

我想在DART构建的Chrome打包应用中使用通知。

I want to use notification in Chrome Packaged app, built by DART.

我的pubspec.yaml是：

my pubspec.yaml is:

dependencies:
    browser: any
    chrome: any
transformers:
    - chrome

我的main.dart是：

my main.dart is:

import 'dart:html';
import 'package:chrome/chrome_app.dart' as chrome;

void main() {
   ....
     NotificationOptions notOptions = {
       'message':  'this is a notification message'

     };

chrome.notifications.create('id1', notOptions).then((id) => print('notification created'));
....
}

它给了我一个问题：未定义class'NotificationOptions'

it gave me a problem: "Undefined class 'NotificationOptions'"

如果我在导入程序包的行中删除了 as chrome，则chrome.notifications.create（。 ..）尚未定义 chrome。

if I removed the "as chrome" in the line importing the package, then I'm getting an error at chrome.notifications.create(...) tilling that 'chrome' is undefined.

我在这里犯了什么错误，以及为chrome通知定义选项的正确方法是什么！

what mistake I made here, and what is the correct way to define the options for chrome notifications!

推荐答案

如果在导入中使用作为chrome ，则必须在引用中添加对标识符的前缀此程序包带有 chrome 。

If you use as chrome in the import you have to prefix references to identifiers in this package with chrome.

这不是有效的Dart语法

This is not valid Dart syntax

 NotificationOptions notOptions = {
   'message':  'this is a notification message'

 };

也许应该是

import 'dart:html';
import 'package:chrome/chrome_app.dart' as chrome;

void main() {
 .....
     chrome.NotificationOptions notOptions = new chrome.NotificationOptions(type: chrome.TemplateType.BASIC,
    iconUrl:'/icon.png',title:'notification title', message:  'this is a notification message');

  chrome.notifications.create('id1', notOptions).then((id) => print('notification created'));
  ....
}

manifiedt.json还应包含权限，例如：

also the manifiest.json should include permission, as:

  "permissions": ["notifications"],

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