Flutter 一些Package记录 1

1. styled_widget

使用扩展方法提升开发效率，增强代码可读性

示例代码:

Icon(OMIcons.home, color: Colors.white)
  .padding(all: 10)
  .decorated(color: Color(0xff7AC1E7), shape: BoxShape.circle)
  .padding(all: 15)
  .decorated(color: Color(0xffE8F2F7), shape: BoxShape.circle)
  .padding(all: 20)
  .card(
    elevation: 10,
    shape: RoundedRectangleBorder(
      borderRadius: BorderRadius.circular(20),
    ),
  )
  .alignment(Alignment.center)
  .backgroundColor(Color(0xffEBECF1));

2. intl

提供国际化和本地化工具。可以用来格式化数字和日期

示例代码:

//格式化日期
var dateFormat = DateFormat("yyyy/MM/dd HH:mm:ss");
print(dateFormat.format(DateTime.now()));

3. logger

简单易用、美观的日志输出。

示例代码:

var logger = Logger();
logger.d("Logger is working!");

4. html_unescape

HTML特殊字符解码

实例代码:

var unescape = HtmlUnescape();
var text = unescape.convert("<strong>This "escaped" string");
print(text);

5. json_path

通过路径解析JSON

示例代码:

import 'dart:convert';

import 'package:json_path/json_path.dart';

void main() {
  final json = jsonDecode('''
{
  "store": {
    "book": [
      {
        "category": "reference",
        "author": "Nigel Rees",
        "title": "Sayings of the Century",
        "price": 8.95
      },
      {
        "category": "fiction",
        "author": "Evelyn Waugh",
        "title": "Sword of Honour",
        "price": 12.99
      },
      {
        "category": "fiction",
        "author": "Herman Melville",
        "title": "Moby Dick",
        "isbn": "0-553-21311-3",
        "price": 8.99
      },
      {
        "category": "fiction",
        "author": "J. R. R. Tolkien",
        "title": "The Lord of the Rings",
        "isbn": "0-395-19395-8",
        "price": 22.99
      }
    ],
    "bicycle": {
      "color": "red",
      "price": 19.95
    }
  }
}  
  ''');

  final prices = JsonPath(r'$..price');

  print('All prices in the store:');

  /// The following code will print:
  ///
  /// $['store']['book'][0]['price']:    8.95
  /// $['store']['book'][6]['price']:    12.99
  /// $['store']['book'][7]['price']:    8.99
  /// $['store']['book'][8]['price']:    22.99
  /// $['store']['bicycle']['price']:    19.95
  prices
      .read(json)
      .map((match) => '${match.path}:\t${match.value}')
      .forEach(print);
}

6. translator

封装谷歌翻译API，国内可用

示例代码:

final translator = GoogleTranslator();
final input = "Здравствуйте. Ты в порядке?";
translator.translate(input, from: 'ru', to: 'en').then(print);
// prints Hello. Are you okay?
var translation = await translator.translate("Dart is very cool!", to: 'pl');
print(translation);
// prints Dart jest bardzo fajny!
print(await "example".translate(to: 'pt'));
// prints exemplo

7. puppeteer

用于通过 DevTools 协议自动化 Chrome 浏览器(主要用于爬虫)