file_picker_cross 4.6.0

Select, open, choose or pick documents, images videos or other files on Android, iOS, the desktop and the web for reading, writing, use as String, byte list or HTTP uploads.

example/lib/main.dart

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

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final GlobalKey exportKey = GlobalKey();
  FilePickerCross? filePickerCross;

  String _fileString = '';
  Set<String?>? lastFiles;
  FileQuotaCross quota = FileQuotaCross(quota: 0, usage: 0);

  @override
  void initState() {
    FilePickerCross.listInternalFiles()
        .then((value) => setState(() => lastFiles = value.toSet()));
    FilePickerCross.quota().then((value) => setState(() => quota = value));
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
          colorScheme: ColorScheme.fromSwatch().copyWith(
              primary: Colors.blueGrey, secondary: Colors.lightGreen)),
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: ListView(
          padding: const EdgeInsets.all(8),
          children: <Widget>[
            Text(
              'Last files',
              style: Theme.of(context).textTheme.headline5,
            ),
            (lastFiles == null)
                ? const Center(
                    child: CircularProgressIndicator(),
                  )
                : ListView.builder(
                    shrinkWrap: true,
                    primary: false,
                    physics: const NeverScrollableScrollPhysics(),
                    itemBuilder: (context, index) => ListTile(
                      leading: Text('$index.'),
                      title: Text(lastFiles!.toList()[index]!),
                      onTap: () async => setFilePicker(
                          await FilePickerCross.fromInternalPath(
                              path: lastFiles!.toList()[index]!)),
                    ),
                    itemCount: lastFiles!.length,
                  ),
            Builder(
              builder: (context) => ElevatedButton(
                onPressed: () => _selectFile(context),
                child: const Text('Open File...'),
              ),
            ),
            (filePickerCross == null)
                ? const Text('Open a file first, to save')
                : ElevatedButton(
                    key: exportKey,
                    onPressed: _selectSaveFile,
                    child: const Text('Save as...'),
                  ),
            Text(
              'File system details',
              style: Theme.of(context).textTheme.headline5,
            ),
            Text('Quota: ${(quota.quota / 1e6).round()} MB'),
            Text(
                'Usage: ${(quota.usage / 1e6).round()}; Remaining: ${(quota.remaining / 1e6).round()}'),
            Text('Percentage: ${quota.relative.roundToDouble()}'),
            Text(
              'File details',
              style: Theme.of(context).textTheme.headline5,
            ),
            Text(
                'File path: ${filePickerCross?.path ?? 'unknown'} (Might cause issues on web)\n'),
            Text('File length: ${filePickerCross?.length ?? 0}\n'),
            Text('File as String: $_fileString\n'),
          ],
        ),
      ),
    );
  }

  void _selectFile(context) {
    FilePickerCross.importMultipleFromStorage().then((filePicker) {
      setFilePicker(filePicker[0]);
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text('You selected ${filePicker.length} file(s).'),
        ),
      );

      setState(() {});
    });
  }

  void _selectSaveFile() {
    RenderBox renderBox =
        exportKey.currentContext!.findRenderObject() as RenderBox;
    Offset position = renderBox.localToGlobal(Offset.zero);
    filePickerCross!.exportToStorage(
        subject: filePickerCross!.fileName,
        sharePositionOrigin: Rect.fromLTWH(
            //
            position.dx,
            position.dy,
            renderBox.size.width,
            renderBox.size.height));
  }

  setFilePicker(FilePickerCross filePicker) => setState(() {
        filePickerCross = filePicker;
        filePickerCross!.saveToPath(path: filePickerCross!.fileName!);
        FilePickerCross.quota().then((value) {
          setState(() => quota = value);
        });
        lastFiles!.add(filePickerCross!.fileName);
        try {
          _fileString = filePickerCross.toString();
        } catch (e) {
          _fileString = 'Not a text file. Showing base64.\n\n' +
              filePickerCross!.toBase64();
        }
      });
}