1、网络库 dio
dio: ^5.4.0
import 'package:dio/dio.dart'; final dio = Dio(); void getHttp() async { final response = await dio.get('https://dart.dev'); print(response); }
2、JSON解析
json_serializable: ^6.7.1
json_annotation: ^4.8.1
build_runner: ^2.4.7
新建一个模型 test_model.dart
import 'package:json_annotation/json_annotation.dart'; part 'test_model.g.dart'; @JsonSerializable() class TestModel { String name = ""; int age = 0; double height = 0; TestModel({required this.name, required this.age, required this.height}); factory TestModel.fromJson(Map<String, dynamic> json) => _$TestModelFromJson(json); Map<String, dynamic> toJson() => _$TestModelToJson(this); }
终端执行
dart run build_runner build
3、获取文件路径
path_provider: ^2.1.1
void _downlodUrl() async { var url = 'https://sample-videos.com/video123/flv/240/big_buck_bunny_240p_10mb.flv'; var path = await getDownloadsDirectory(); print("ios paht:$path"); String savePath = "${path?.path}/temp.mp4"; print(savePath); Dio().download(url, savePath,onReceiveProgress: (c,t) { var progress = "${(c / t * 100)}%"; print(progress); }); }
4、数据存储
shared_preferences: ^2.2.2
// Obtain shared preferences.
final SharedPreferences prefs = await SharedPreferences.getInstance();
// Save an integer value to 'counter' key.
await prefs.setInt('counter', 10);
// Save an boolean value to 'repeat' key.
await prefs.setBool('repeat', true);
// Save an double value to 'decimal' key.
await prefs.setDouble('decimal', 1.5);
// Save an String value to 'action' key.
await prefs.setString('action', 'Start');
// Save an list of strings to 'items' key.
await prefs.setStringList('items', <String>['Earth', 'Moon', 'Sun']);
//获取
// Try reading data from the 'counter' key. If it doesn't exist, returns null.
final int? counter = prefs.getInt('counter');
// Try reading data from the 'repeat' key. If it doesn't exist, returns null.
final bool? repeat = prefs.getBool('repeat');
// Try reading data from the 'decimal' key. If it doesn't exist, returns null.
final double? decimal = prefs.getDouble('decimal');
// Try reading data from the 'action' key. If it doesn't exist, returns null.
final String? action = prefs.getString('action');
// Try reading data from the 'items' key. If it doesn't exist, returns null.
final List<String>? items = prefs.getStringList('items');// Remove data for the 'counter' key.await prefs.remove('counter');
5.图片快速加载
flutter_gen_runner: ^5.3.2
yaml中添加
build_runner: ^2.4.7 flutter_gen_runner: ^5.3.2
yaml添加图片路径
导入库后执行命令
dart run build_runner build
更新图片
flutter clean
dart run build_runner build
使用
Assets.asset.image.img1.image()
6.打开相册、相机
image_picker: ^1.0.6
在项目中添加相应的权限
如果运行报错、先用xdode运行程序、把权限授权了在运行
void openAlbum() async{ final ImagePicker picker = ImagePicker(); // Pick an image. final XFile? image = await picker.pickImage(source: ImageSource.gallery); } }
7.局部刷新框架 getX
get: ^4.6.6
1.修改 MaterialApp 为 GetMaterialApp
2.Controller继承与GetXController
class MinePageController extends GetxController { //GetX改造步骤3:给变量值添加.obs var_backgroundurl = Assets.image.defaultPhotopath.obs String get backgroundUrl => _backgroundUrl.value set backgroundUrl(String url) => _backgroundUrlvalue = url
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