Flutter+鸿蒙 NEXT 开发获取系统文件路径
在具体的开发过程中,有时需要获取临时目录、文档目录等需求.本文具体讲解怎么在 Flutter 中可以利用 path_provider 插件来完成此项工作，OpenHarmony SIG 组织对该插件做了鸿蒙 NEXT 系统的适配，接下来将详细讲解如何利用 path_provider 插件来获取系统文件路径。
在引用的项目中，pubspec.yaml 中 dependencies 新增配置：
dependencies: path_provider: git: url: "https://gitee.com/openharmony-sig/flutter_packages.git" path: "packages/path_provider/path_provider"
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项目根目录运行flutter pub get；（ohos/entry/oh-package.json5 会自动添加如下相关插件 har 依赖）
{ "name": "entry", "version": "1.0.0", "description": "Please describe the basic information.", "main": "", "author": "", "license": "", "dependencies": { "@ohos/flutter_ohos": "file:../har/flutter.har", "integration_test": "file:../har/integration_test.har", "path_provider_ohos": "file:../har/path_provider_ohos.har" }}
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导入 path_provider 插件
在需要使用 path_provider 插件的 dart 文件中，使用下面的代码导入插件：
import 'package:path_provider_platform_interface/path_provider_platform_interface.dart';
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获取系统路径一些基本使用:
final PathProviderPlatform provider = PathProviderPlatform.instance; Future<String?>? _tempDirectory; Future<String?>? _appSupportDirectory; Future<String?>? _appDocumentsDirectory; Future<String?>? _appCacheDirectory; Future<String?>? _externalDocumentsDirectory; Future<List<String>?>? _externalStorageDirectories; Future<List<String>?>? _externalCacheDirectories; Future<String?>? _downloadsDirectory; void _requestTempDirectory() { setState(() { _tempDirectory = provider.getTemporaryPath(); }); } void _requestAppDocumentsDirectory() { setState(() { _appDocumentsDirectory = provider.getApplicationDocumentsPath(); }); }
void _requestAppSupportDirectory() { setState(() { _appSupportDirectory = provider.getApplicationSupportPath(); }); }
void _requestAppCacheDirectory() { setState(() { _appCacheDirectory = provider.getApplicationCachePath(); }); }
void _requestExternalStorageDirectory() { setState(() { _externalDocumentsDirectory = provider.getExternalStoragePath(); }); }
void _requestExternalStorageDirectories(StorageDirectory type) { setState(() { _externalStorageDirectories = provider.getExternalStoragePaths(type: type); }); }
void _requestExternalCacheDirectories() { setState(() { _externalCacheDirectories = provider.getExternalCachePaths(); }); }
void _requestDownloadsDirectory() { setState(() { _downloadsDirectory = provider.getDownloadsPath(); }); }
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以上就是 Flutter+鸿蒙 NEXT 开发获取系统文件路径具体实现.
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