1. dio: ^2.1.4
    flutter的http请求库，支持get、post请求，支持添加拦截器，支持添加请求头
 2. shared_preferences
    数据库持久化的库，保存轻量级的用户数据。对应android的SharedPreferences，对应ios的NSUserDefaults
 3. crypto: ^2.0.6
    数据加密库，MD5,DES加密，项目中使用MD5的加密
 4.event_bus: ^1.0.1
    事件分发总线库,使用StreamController实现的，对标Android的EventBus
 5. flutter_webview_plugin: ^0.3.5
    webview 加载库
 6. flutter_html: ^0.10.4
    HTML富文本加载库
 7. flutter_swiper: ^1.1.6
     flutter的图片轮播库
 8.image_picker: ^0.6.1+4
     图片选择库，支持相册，拍照功能
 9. image_cropper: ^1.0.2
    图片修剪的库
 10. fluro: ^1.3.4
     控制路由跳转的库
 11. sqflite: ^1.1.5
     数据库的库
 12.path_provider: ^1.1.0
     访问文件路径的库
 13. permission_handler: ^3.1.0
     权限请求的库
 14. fluttertoast: ^3.1.0
     toast 的库
 15. video_player: ^0.10.0+2
     视频播放的库
 16. auto_orientation: ^0.0.2
     转屏（竖屏，横屏）的库
 17.extended_image: ^0.5.5
    图片的三级缓存的库
 18.url_launcher: ^5.0.2
    打电话，邮箱 ，短信的库
 19. intl: ^0.15.7
     国际化
 20.chewie: ^0.9.7
    对video_player的封装，视频控制器，控制栏和全屏的功能

english_words 随机生成单词

dependencies:
  flutter:
    sdk: flutter
  english_words:

import "package:english_words/english_words.dart";
void main(){
    // generateWordPairs 随机生成2个单词
  var s1 = generateWordPairs().take(2);
  print(s1); //(floorguide, pangrief)
  print(s1.toList()); //[coldpond, madjudge]
  print(s1.map((e) => e.asPascalCase).toList()); //[StrictFirm, LightRim]
  // 生成指定单词
  var word = new WordPair('book', 'go');
  print(word); //bookgo
  print(word.asPascalCase); //BookGo
  // 随机生成一个单词
  var w2 = new WordPair.random();
  print(w2); //stillpitch
  print((w2).asPascalCase); //StillPitch  帕斯卡命名法(首字母大写)，后续单字的首字母都用大写字母
  print((w2).asCamelCase); //stillPitch   骆驼式命名法(首字母小写)，后续单字的首字母都用大写字母
  print((w2).asLowerCase); //stillpitch
  print((w2).asUpperCase); //STILLPITCH
  print((w2).asString); //stillpitch
}

crypto 加密

https://pub.dev/packages/crypto

安装依赖

dependencies:
  crypto: ^2.1.5

导入

import 'package:crypto/crypto.dart';

A set of cryptographic hashing functions implemented in pure Dart
The following hashing algorithms are supported:

• SHA-1
• SHA-224
• SHA-256
• SHA-384
• SHA-512
• MD5
• HMAC (i.e. HMAC-MD5, HMAC-SHA1, HMAC-SHA256)

Digest on a single input

To hash a list of bytes, invoke the convert method on the sha1, sha256 or md5 objects.

import 'package:crypto/crypto.dart';
import 'dart:convert'; // for the utf8.encode method
import 'package:convert/convert.dart';
void main() {
  var bytes = utf8.encode("foobar"); // data being hashed
  //等同于：
  var bytes = Utf8Encoder().convert("foobar");
  var digest = md5.convert(bytes);
  return hex.encode(digest.bytes);    //hex 需要 import 'package:convert/convert.dart';
  //等同于
  return digest.toString();
  print(bytes);
  print(digest);
  print(digest.bytes); 
}
//md5.convert(utf8.encode('foobar')).toString()

示例

import 'dart:convert';
import 'package:convert/convert.dart';
void main(){
  String generateMd5(String data) {
    var bytes = utf8.encode(data);
    var digest = md5.convert(bytes);
    return hex.encode(digest.bytes);
  }
  String getSign(Map paramerter) {
    var Key = '密钥';
    var timestamp = DateTime.now().millisecondsSinceEpoch;
    var versionNumber = 'app-V1';
    paramerter['timestamp'] = timestamp.toString();
    paramerter['versionNumber'] = versionNumber;
    // 存储所有的key
    List<String> allKeys = [];
    paramerter.forEach((key, value) {
      allKeys.add(key + value);
    });
    // key排序
    allKeys.sort((a, b) => a.compareTo(b));
    // 数组转string
    String pairString = allKeys.join('');
    // 拼接ABC是你的密钥
    String sign = Key + pairString + Key;
    // hash
    String signString = generateMd5(sign).toUpperCase();
    //String signString = md5.convert(utf8.encode(sign)).toString().toUpperCase();  //直接写也可以
    return signString;
  }
  var formData = {'adCode': '000000'};
  formData['sign'] = getSign(formData);
  print(formData);
  //{adCode: 000000, timestamp: 1607246978538, versionNumber: app-V1, sign: 4DB9FB09BEC1B8681BF426BFA73B9FDF}
};

webview_flutter

https://pub.dev/packages/webview_flutter

安装依赖

dependencies:
  webview_flutter: ^1.0.7

导入

import 'package:webview_flutter/webview_flutter.dart';

使用

webview_page.dart

import 'package:flutter/material.dart';
import 'package:app1/pages/web_view/webview_template.dart';
class WebviewPage extends StatelessWidget {
  WebviewPage({
    key,
    @required this.url,
    this.title,
    this.showAppBar,
  }) : super(key: key);
  final String url;
  final String title;
  final bool showAppBar;
  @override
  Widget build(BuildContext context) {
    return WebViewTemplate(
      url: url,
      title: title,
      showAppBar: showAppBar,
    );
  }
}

webview_template.dart

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
import 'package:app1/coms/loading/ELoading.dart';
class WebViewTemplate extends StatefulWidget {
  WebViewTemplate({
    key,
    @required this.url,
    this.title,
    this.showAppBar,
  }) : super(key: key);
  final String url;
  final String title;
  final bool showAppBar;
  @override
  _WebViewTemplateState createState() => _WebViewTemplateState();
}
class _WebViewTemplateState extends State<WebViewTemplate> {
  @override
  void initState() {
    super.initState();
    // Enable hybrid composition.
    if (Platform.isAndroid) WebView.platform = SurfaceAndroidWebView();
  }
  onPageStarted(url) {
    ELoading.show(status: "加载中...");
  }
  onPageFinished(url) {
    ELoading.destroy();
  }
  @override
  dispose() {
    super.dispose();
    ELoading.destroy();
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: (widget.showAppBar) ? AppBar(title: Text(widget.title)) : null,
      body: WebView(
        initialUrl: widget.url,
        javascriptMode: JavascriptMode.unrestricted,
        onPageStarted: onPageStarted,
        onPageFinished: onPageFinished,
      ),
    );
  }
}