filesystem_picker 1.0.0+1

FileSystem file or folder picker dialog. Allows the user to browse the file system and pick a folder or file.

example/lib/main.dart

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

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();

  static _MyAppState of(BuildContext context) {
    return context.findAncestorStateOfType<_MyAppState>();
  }
}

class _MyAppState extends State<MyApp> {
  Brightness _brightness = Brightness.light;

  Brightness get brightness => _brightness;

  void setThemeBrightness(Brightness brightness) {
    setState(() {
      _brightness = brightness;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'FileSystem Picker Demo',
      theme: ThemeData(
        primarySwatch: Colors.teal,
        accentColor: Colors.white,
        buttonTheme: ButtonThemeData(
          buttonColor: Colors.teal,
          textTheme: ButtonTextTheme.accent,
        ),
        brightness: _brightness,
      ),
      home: DemoPage(),
    );
  }
}

class DemoPage extends StatefulWidget {
  @override
  _DemoPageState createState() => _DemoPageState();
}

class _DemoPageState extends State<DemoPage> {
  Directory rootPath;

  String filePath;
  String dirPath;

  @override
  void initState() {
    super.initState();

    _prepareStorage();
  }

  Future<void> _prepareStorage() async {
    rootPath = await getTemporaryDirectory();

    // Create sample directory if not exists
    Directory sampleFolder = Directory('${rootPath.path}/Sample folder');
    if (!sampleFolder.existsSync()) {
      sampleFolder.createSync();
    }

    // Create sample file if not exists
    File sampleFile = File('${sampleFolder.path}/Sample.txt');
    if (!sampleFile.existsSync()) {
      sampleFile.writeAsStringSync('FileSystem Picker sample file.');
    }

    setState(() {});
  }

  Future<void> _openFile(BuildContext context) async {
    String path = await FilesystemPicker.open(
      title: 'Open file',
      context: context,
      rootDirectory: rootPath,
      fsType: FilesystemType.file,
      allowedExtensions: ['.txt'],
    );

    File file = File('$path');
    String contents = await file.readAsString();

    Scaffold.of(context).showSnackBar(SnackBar(content: Text(contents)));

    setState(() {
      filePath = path;
    });
  }

  Future<void> _pickDir(BuildContext context) async {
    String path = await FilesystemPicker.open(
      title: 'Save to folder',
      context: context,
      rootDirectory: rootPath,
      fsType: FilesystemType.folder,
      pickText: 'Save file to this folder',
    );

    setState(() {
      dirPath = path;
    });
  }

  @override
  Widget build(BuildContext context) {
    final appState = MyApp.of(context);

    return Scaffold(
      body: Builder(
        builder: (context) => Center(
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 20),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                // Theme Brightness Switch Button
                RaisedButton(
                  child: Text((appState.brightness == Brightness.light)
                      ? 'Switch to Dark theme'
                      : 'Switch to Light theme'),
                  onPressed: () {
                    appState.setThemeBrightness(
                        appState.brightness == Brightness.light
                            ? Brightness.dark
                            : Brightness.light);
                  },
                ),

                Divider(height: 60),

                // Directory picker section

                Padding(
                  padding: const EdgeInsets.only(bottom: 20),
                  child: Text(
                    'Directory Picker',
                    style: Theme.of(context).textTheme.headline,
                  ),
                ),

                if (dirPath != null)
                  Padding(
                    padding: const EdgeInsets.symmetric(vertical: 10),
                    child: Text('$dirPath'),
                  ),

                RaisedButton(
                  child: Text('Save File'),
                  onPressed:
                      (rootPath != null) ? () => _pickDir(context) : null,
                ),

                Divider(height: 60),

                // File picker section

                Padding(
                  padding: const EdgeInsets.only(bottom: 20),
                  child: Text(
                    'File Picker',
                    style: Theme.of(context).textTheme.headline,
                  ),
                ),

                if (filePath != null)
                  Padding(
                    padding: const EdgeInsets.symmetric(vertical: 10),
                    child: Text('$filePath'),
                  ),

                RaisedButton(
                  child: Text('Open File'),
                  onPressed:
                      (rootPath != null) ? () => _openFile(context) : null,
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}