Untitled

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:ota_update/ota_update.dart';

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

class _MyAppState extends State<MyApp> {
  OtaEvent currentEvent;
  bool _isLoading = false;
  double _downloadProgress = 0.0;

  Future<void> _checkForUpdate() async {
    setState(() {
      _isLoading = true;
    });
    try {
      // Replace "APP_URL" with the URL of the new version of your app
      OtaUpdate()
        .execute("APP_URL")
        .listen(
          (OtaEvent event) {
            setState(() {
              currentEvent = event;
              if (event.status == OtaStatus.DOWNLOADING) {
                _downloadProgress = event.value;
              }
            });
          },
        );
    } catch (e) {
      print('Failed to check for update: $e');
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  void _onCancelPressed() {
    OtaUpdate()
        .cancelDownload()
        .then((value) => setState(() {
              currentEvent = OtaEvent(
                status: OtaStatus.ABORTED,
                value: 'Update cancelled',
              );
              _isLoading = false;
            }));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('OTA Update Example'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            if (_isLoading)
              Column(
                children: [
                  CircularProgressIndicator(),
                  SizedBox(height: 16),
                  Text(
                    'Downloading new version...',
                    style: TextStyle(fontSize: 16),
                  ),
                  SizedBox(height: 16),
                  LinearProgressIndicator(
                    value: _downloadProgress,
                  ),
                  SizedBox(height: 16),
                  ElevatedButton(
                    onPressed: _onCancelPressed,
                    child: Text('Cancel'),
                  ),
                ],
              )
            else
              ElevatedButton(
                onPressed: _checkForUpdate,
                child: Text('Check for Update'),
              ),
            if (currentEvent != null)
              Text('${currentEvent.status} : ${currentEvent.value}'),
          ],
        ),
      ),
    );
  }
}