share_files.dart

Purpose

This file implements a Flutter UI screen that allows users to view and share .gz compressed data files collected by the HealthyWear app. The feature supports multi-file selection and is localized for both English and Spanish.

Dependencies

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

  • path_provider: Locates app storage directory.

  • share_plus: Shares files via platform-native interfaces.

  • cross_file: Converts files to XFile format.

  • dart:io: File access and directory traversal.

ShareFilesPage Widget

class ShareFilesPage extends StatefulWidget {
  final Locale locale;
}

  • Accepts a Locale to determine language-specific messages.

  • Defines a stateful widget to manage file loading and UI interaction.

Internal State

List<File> _allFiles = [];
Set<File> _selected = {};
bool _selectAll = false;

  • _allFiles: All discovered .gz files.

  • _selected: Set of files selected by the user.

  • _selectAll: Boolean toggle for selecting all files at once.

Lifecycle

initState()

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

Initializes file loading when widget is created.

Load Files

Future<void> _loadFiles()

  • Gets platform-specific storage directory.

  • Lists and filters .gz files.

  • Updates UI state accordingly.

Select All

void _toggleSelectAll(bool? v)

Allows user to select or deselect all files with a single tap.

Sharing Functionality

Future<void> _share() async

  • Converts selected files to XFile instances.

  • Uses localized message based on Locale.

  • Triggers native share dialog.

Example Message

  • English: "Here are my pending data files."

  • Spanish: "Aquí están mis archivos de datos pendientes."

UI Considerations

Though not visible in this preview:

  • The widget likely includes checkboxes or toggles for file selection.

  • A share button triggers _share().

  • UI is built to reflect _allFiles, _selected, and _selectAll states.

Platform Notes

  • Compatible with Android and iOS.

  • Access paths and permission policies should be considered during deployment (especially for Android 10+).