Flutter文件系统路径获取插件path_provider_tizen的使用
Flutter文件系统路径获取插件path_provider_tizen的使用
path_provider_tizen 是 path_provider 插件的 Tizen 实现。该插件允许你在 Tizen 平台上获取应用的文件系统路径。
使用方法
首先，在你的 pubspec.yaml 文件中添加以下依赖项：
dependencies:
path_provider: ^2.1.4
path_provider_tizen: ^2.2.0
然后，你可以通过导入 path_provider 包来使用它：
import 'package:path_provider/path_provider.dart';
支持的API
✅ getTemporaryDirectory（返回应用的缓存目录路径）✅ getApplicationSupportDirectory（返回应用的数据目录路径）❌ getLibraryDirectory（仅限 iOS）✅ getApplicationDocumentsDirectory（返回应用的数据目录路径）✅ getApplicationCachePath（返回应用的缓存目录路径）✅ getExternalStorageDirectory（需要SD卡）✅ getExternalCacheDirectories（需要SD卡）✅ getExternalStorageDirectories（返回共享媒体库路径，如/home/owner/media/Music）❌ getDownloadsDirectory（仅限桌面）
必需的权限
访问 getExternalStorageDirectories 返回的路径
在你的 tizen-manifest.xml 文件中的 <manifest> 部分添加以下权限：
<privileges>
<privilege>http://tizen.org/privilege/mediastorage</privilege>
</privileges>
此外，还需要通过 permission_handler 插件获取 Permission.mediaLibrary 权限。此权限在 TV 设备上默认已授予。
访问 getExternalStorageDirectory 和 getExternalCacheDirectories 返回的路径
在你的 tizen-manifest.xml 文件中的 <manifest> 部分添加以下权限：
<privileges>
<privilege>http://tizen.org/privilege/externalstorage.appdata</privilege>
</privileges>
示例代码
以下是一个完整的示例，展示了如何使用 path_provider_tizen 获取不同类型的文件系统路径。
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// ignore_for_file: public_member_api_docs
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'Path Provider',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Path Provider'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
[@override](/user/override)
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Future<Directory?>? _tempDirectory;
Future<Directory?>? _appSupportDirectory;
Future<Directory?>? _appLibraryDirectory;
Future<Directory?>? _appDocumentsDirectory;
Future<Directory?>? _appCacheDirectory;
Future<Directory?>? _externalDocumentsDirectory;
Future<List<Directory>?>? _externalStorageDirectories;
Future<List<Directory>?>? _externalCacheDirectories;
Future<Directory?>? _downloadsDirectory;
void _requestTempDirectory() {
setState(() {
_tempDirectory = getTemporaryDirectory();
});
}
Widget _buildDirectory(BuildContext context, AsyncSnapshot<Directory?> snapshot) {
Text text = const Text('');
if (snapshot.connectionState == ConnectionState.done) {
if (snapshot.hasError) {
text = Text('Error: ${snapshot.error}');
} else if (snapshot.hasData) {
text = Text('path: ${snapshot.data!.path}');
} else {
text = const Text('path unavailable');
}
}
return Padding(padding: const EdgeInsets.all(16.0), child: text);
}
Widget _buildDirectories(BuildContext context, AsyncSnapshot<List<Directory>?> snapshot) {
Text text = const Text('');
if (snapshot.connectionState == ConnectionState.done) {
if (snapshot.hasError) {
text = Text('Error: ${snapshot.error}');
} else if (snapshot.hasData) {
final String combined = snapshot.data!.map((Directory d) => d.path).join(', ');
text = Text('paths: $combined');
} else {
text = const Text('path unavailable');
}
}
return Padding(padding: const EdgeInsets.all(16.0), child: text);
}
void _requestAppDocumentsDirectory() {
setState(() {
_appDocumentsDirectory = getApplicationDocumentsDirectory();
});
}
void _requestAppSupportDirectory() {
setState(() {
_appSupportDirectory = getApplicationSupportDirectory();
});
}
void _requestAppLibraryDirectory() {
setState(() {
_appLibraryDirectory = getLibraryDirectory();
});
}
void _requestAppCacheDirectory() {
setState(() {
_appCacheDirectory = getApplicationCacheDirectory();
});
}
void _requestExternalStorageDirectory() {
setState(() {
_externalDocumentsDirectory = getExternalStorageDirectory();
});
}
void _requestExternalStorageDirectories(StorageDirectory type) {
setState(() {
_externalStorageDirectories = getExternalStorageDirectories(type: type);
});
}
void _requestExternalCacheDirectories() {
setState(() {
_externalCacheDirectories = getExternalCacheDirectories();
});
}
void _requestDownloadsDirectory() {
setState(() {
_downloadsDirectory = getDownloadsDirectory();
});
}
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: ListView(
children: [
Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: ElevatedButton(
onPressed: _requestTempDirectory,
child: const Text(
'Get Temporary Directory',
),
),
),
FutureBuilder<Directory?>(
future: _tempDirectory,
builder: _buildDirectory,
),
],
),
Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: ElevatedButton(
onPressed: _requestAppDocumentsDirectory,
child: const Text(
'Get Application Documents Directory',
),
),
),
FutureBuilder<Directory?>(
future: _appDocumentsDirectory,
builder: _buildDirectory,
),
],
),
Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: ElevatedButton(
onPressed: _requestAppSupportDirectory,
child: const Text(
'Get Application Support Directory',
),
),
),
FutureBuilder<Directory?>(
future: _appSupportDirectory,
builder: _buildDirectory,
),
],
),
Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: ElevatedButton(
onPressed: Platform.isAndroid ? null : _requestAppLibraryDirectory,
child: Text(
Platform.isAndroid
? 'Application Library Directory unavailable'
: 'Get Application Library Directory',
),
),
),
FutureBuilder<Directory?>(
future: _appLibraryDirectory,
builder: _buildDirectory,
),
],
),
Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: ElevatedButton(
onPressed: _requestAppCacheDirectory,
child: const Text(
'Get Application Cache Directory',
),
),
),
FutureBuilder<Directory?>(
future: _appCacheDirectory,
builder: _buildDirectory,
),
],
),
Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: ElevatedButton(
onPressed: !Platform.isAndroid
? null
: _requestExternalStorageDirectory,
child: Text(
!Platform.isAndroid
? 'External storage is unavailable'
: 'Get External Storage Directory',
),
),
),
FutureBuilder<Directory?>(
future: _externalDocumentsDirectory,
builder: _buildDirectory,
),
],
),
Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: ElevatedButton(
onPressed: !Platform.isAndroid
? null
: () {
_requestExternalStorageDirectories(
StorageDirectory.music,
);
},
child: Text(
!Platform.isAndroid
? 'External directories are unavailable'
: 'Get External Storage Directories',
),
),
),
FutureBuilder<List<Directory>?>(
future: _externalStorageDirectories,
builder: _buildDirectories,
),
],
),
Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: ElevatedButton(
onPressed: !Platform.isAndroid
? null
: _requestExternalCacheDirectories,
child: Text(
!Platform.isAndroid
? 'External directories are unavailable'
: 'Get External Cache Directories',
),
),
),
FutureBuilder<List<Directory>?>(
future: _externalCacheDirectories,
builder: _buildDirectories,
),
],
),
Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: ElevatedButton(
onPressed: Platform.isAndroid || Platform.isIOS
? null
: _requestDownloadsDirectory,
child: Text(
Platform.isAndroid || Platform.isIOS
? 'Downloads directory is unavailable'
: 'Get Downloads Directory',
),
),
),
FutureBuilder<Directory?>(
future: _downloadsDirectory,
builder: _buildDirectory,
),
],
),
],
),
),
);
}
}
更多关于Flutter文件系统路径获取插件path_provider_tizen的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
1 回复
更多关于Flutter文件系统路径获取插件path_provider_tizen的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然，以下是如何在Flutter应用中使用path_provider_tizen插件来获取文件系统路径的示例代码。path_provider_tizen是一个为Tizen平台（比如Tizen OS设备）提供文件系统路径的Flutter插件。请注意，Tizen是一个较少见的操作系统，通常用于智能手表等可穿戴设备，所以确保你的开发环境已经正确配置以支持Tizen开发。
首先，确保你已经在pubspec.yaml文件中添加了path_provider_tizen依赖：
dependencies:
flutter:
sdk: flutter
path_provider_tizen: ^x.y.z # 使用最新版本号替换x.y.z
然后，运行flutter pub get来安装依赖。
接下来，在你的Flutter项目中，你可以使用以下代码来获取不同的文件系统路径：
import 'package:flutter/material.dart';
import 'package:path_provider_tizen/path_provider_tizen.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Path Provider Tizen Example'),
),
body: Center(
child: FutureBuilder<void>(
future: _getPaths(),
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
if (snapshot.hasError) {
return Text('Error: ${snapshot.error}');
} else {
// 在这里显示获取到的路径
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('Application Documents Directory: ${_appDocsDir!}'),
Text('Temporary Directory: ${_tempDir!}'),
// 可以根据需要添加更多路径
],
);
}
} else {
return CircularProgressIndicator();
}
},
),
),
),
);
}
late String? _appDocsDir;
late String? _tempDir;
Future<void> _getPaths() async {
// 获取应用文档目录
final appDocsDir = await getApplicationDocumentsDirectory();
_appDocsDir = appDocsDir.path;
// 获取临时目录
final tempDir = await getTemporaryDirectory();
_tempDir = tempDir.path;
// 可以根据需要获取其他路径，例如外部存储目录等（如果Tizen支持）
// final externalDir = await getExternalStorageDirectory();
// _externalDir = externalDir?.path;
}
}
在这个示例中，我们创建了一个简单的Flutter应用，它使用FutureBuilder来异步获取应用文档目录和临时目录的路径，并在UI中显示这些路径。
getApplicationDocumentsDirectory()用于获取应用的文档目录路径。getTemporaryDirectory()用于获取临时目录路径。
请注意，Tizen平台的文件系统和权限模型可能与传统的移动平台有所不同，因此在实际开发中，你可能需要查阅Tizen的官方文档来确保你的应用有适当的权限来访问这些路径。
此外，由于Tizen是一个不太常见的平台，某些Flutter插件可能不完全支持或需要特定的适配工作。确保你查阅了path_provider_tizen插件的官方文档和社区资源以获取最新的信息和可能的适配指南。
