file_picker_cross 4.2.0

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(MyApp());
}

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

class _MyAppState extends State<MyApp> {
  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(
          primaryColor: Colors.blueGrey, accentColor: Colors.lightGreen),
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: ListView(
          padding: EdgeInsets.all(8),
          children: <Widget>[
            Text(
              'Last files',
              style: Theme.of(context).textTheme.headline5,
            ),
            (lastFiles == null)
                ? Center(
                    child: CircularProgressIndicator(),
                  )
                : ListView.builder(
                    shrinkWrap: true,
                    primary: false,
                    physics: 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,
                  ),
            RaisedButton(
              onPressed: _selectFile,
              child: Text('Open File...'),
            ),
            (filePickerCross == null)
                ? Text('Open a file first, to save')
                : RaisedButton(
                    onPressed: _selectSaveFile,
                    child: 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() {
    FilePickerCross.importFromStorage()
        .then((filePicker) => setFilePicker(filePicker));
  }

  void _selectSaveFile() {
    filePickerCross.exportToStorage();
  }

  setFilePicker(FilePickerCross filePicker) => setState(() {
        filePickerCross = filePicker;
        filePickerCross.saveToPath(path: filePickerCross.fileName);
        FilePickerCross.quota().then((value) {
          print(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();
        }
      });
}