flutter:得到临时目录、下载目录等路径

一，下载第三方库:

地址:

https://pub.dev/packages/path_provider

编辑pubspec.yaml,添加path_provider

dependencies:
  flutter:
    sdk: flutter
  path_provider: ^2.1.5

点击pub get下载

各功能支持的平台:

二，代码：

import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';

class PathPage extends StatefulWidget {
  final Map arguments;

  // 为title设置一个默认参数，这样的跳转该界面时可以不传值。
  PathPage({super.key, required this.arguments});
  @override
  State<PathPage> createState() => _PathPageState();
}

class _PathPageState extends State<PathPage> {

  Future<String> _localTempPath() async {
    final directory = await getTemporaryDirectory();
    return directory.path;
  }

  Future<String> _localDownloadPath() async {
    final directory = await getDownloadsDirectory();
    return directory!.path;
  }

  Future<String> _localDocumentPath() async {
    final directory = await getApplicationDocumentsDirectory();
    return directory.path;
  }

  Future<String> _localCachePath() async {
    final directory = await getApplicationCacheDirectory();
    return directory.path;
  }

  Future<String> _localLibraryPath() async {
    final directory = await getLibraryDirectory();
    return directory.path;
  }

  Future<String> _localSupportPath() async {
    final directory = await getApplicationSupportDirectory();
    return directory.path;
  }



  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.primaryContainer,
        title: Text(widget.arguments["title"]),
      ),

      body: Center(
        child: ElevatedButton(
          onPressed: () async {

            String tempDir = await _localTempPath();
            print("临时路径:");
            print(tempDir);

            String DocumentDir = await _localDocumentPath();
            print("用户生成的数据目录:");
            print(DocumentDir);

            String DownloadDir = await _localDownloadPath();
            print("下载文件目录:");
            print(DownloadDir);

            String CacheDir = await _localCachePath();
            print("缓存目录:");
            print(CacheDir);


            /*   不支持android
            String LibraryDir = await _localLibraryPath();
            print("应用持久存储目录:");
            print(LibraryDir);
            */

            String SupportDir = await _localSupportPath();
            print("应用支持目录:");
            print(SupportDir);
          },
          child: Row(
            mainAxisSize: MainAxisSize.min, // 根据内容调整大小
            children: <Widget>[
              Icon(Icons.add), // 图标在左侧
              SizedBox(width: 10), // 可选：添加一些间隔
              Text("得到路径"), // 文本在右侧
            ],
          ),
        ),
      ),

    );
  }
}

三，测试效果:

I/flutter (25250): 临时路径:
I/flutter (25250): /data/user/0/com.example.demo3/cache
I/flutter (25250): 用户生成的数据目录:
I/flutter (25250): /data/user/0/com.example.demo3/app_flutter
I/flutter (25250): 下载文件目录:
I/flutter (25250): /storage/emulated/0/Android/data/com.example.demo3/files/downloads
I/flutter (25250): 缓存目录:
I/flutter (25250): /data/user/0/com.example.demo3/cache
I/flutter (25250): 应用支持目录:
I/flutter (25250): /data/user/0/com.example.demo3/files