String jsonString = await rootBundle.loadString(filePath); return jsonDecode(jsonString); } 上面的代码定义了一个函数loadJsonFromAssets,它将文件路径作为输入并返回解析为Map<String, dynamic>的Future。该函数使用rootBundle.loadString方法将 JSON 文件作为字符串加载,然后使用dart:convert库中的jsonDecode将字符串...
Future<void> readJson() async { final String response = await rootBundle.loadString('assets/sample.json'); final data = await json.decode(response); // ... } 在pubspec.yaml文件的资产部分声明json文件: flutter: assets: - assets/sample.json main.dart import 'package:flutter/material.dart'...
第一种 使用rootBundle import'package:flutter/services.dart';rootBundle.loadString('assets/data/sort_0.json').then((value){_mGoodsSort=json.decode(value);setState((){_mList=_mGoodsSort;});});rootBundle.loadString('assets/data/sort_1.json').then((value){_mGoodsSort1=json.decode(value);}...
factory JsonItem.fromJson(Map<String, dynamic> json) { return JsonItem(name: json['name'], id: json['id']); } } E/flutter (20466): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: Unable to load asset: /data/user/0/com.example.play/cache/file_picker/sample.jso...
从Flutter上的assets文件夹中读取现有数据库的数据,遇到错误时,可以按照以下步骤进行处理: 确保数据库文件已正确放置在Flutter项目的assets文件夹中。可以在项目的pubspec.yaml文件中添加以下代码来声明数据库文件: 代码语言:txt 复制 flutter: assets: - assets/database.db 这里假设数据库文...
readAsset(BuildContext context) async { //方式一 String jsonStr = await DefaultAssetBundle.of(context).loadString("assets/students.json"); print("jsonStr: $jsonStr"); var list = json.decode(jsonStr); for (var e in list) { print(e); ...
So therefore it es easy to load the config file from the assets and have it ready before the app starts. Future<String> loadFromAsset(String name) async { String content = await rootBundle.loadString("assets/cfg/$name.json"); return content; } I wrote a simple flutter package for that...
Since your localization files are in JSON format, you'll need to add .json to your file path. Future load()async{StringjsonStringValues =awaitrootBundle.loadString('assets/languages/${locale.languageCode}.json');// add .json at the endMap<String,dynamic> mappedJson = jsonDecode(json...
final response = await rootBundle.loadString('assets/en_us.json'); final original = utf8.encode(response); final compressed = gzip.encode(original); final decompress = gzip.decode(compressed); final enUS = utf8.decode(decompress); 这样还可以节省一些内存。
例如,将模型文件命名为model.obj,并将其放置在assets目录下,然后在pubspec.yaml文件中添加以下内容: c. 将3D模型文件放置在Flutter项目的assets目录下,并在pubspec.yaml文件中声明该文件。例如,将模型文件命名为model.obj,并将其放置在assets目录下,然后在pubspec.yaml文件中添加以下内容: d. 运行Flutter应用程序,...