torch_light 1.1.0

A Flutter plugin to check if the device has a torch / flashlight, and to turn it on and off.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:torch_light/torch_light.dart';

void main() {
  runApp(TorchApp());
}

class TorchApp extends StatefulWidget {
  @override
  _TorchAppState createState() => _TorchAppState();
}

class _TorchAppState extends State<TorchApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      supportedLocales: const [Locale('en', '')],
      localizationsDelegates: const [
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
      ],
      home: TorchController(),
    );
  }
}

class TorchController extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('torch_light example app'),
      ),
      body: FutureBuilder<bool>(
        future: _isTorchAvailable(context),
        builder: (BuildContext context, AsyncSnapshot<bool> snapshot) {
          if (snapshot.hasData && snapshot.data!) {
            return Column(
              children: [
                Expanded(
                  child: Center(
                    child: ElevatedButton(
                      child: const Text('Enable torch'),
                      onPressed: () async {
                        _enableTorch(context);
                      },
                    ),
                  ),
                ),
                Expanded(
                  child: Center(
                    child: ElevatedButton(
                      child: const Text('Disable torch'),
                      onPressed: () {
                        _disableTorch(context);
                      },
                    ),
                  ),
                ),
              ],
            );
          } else if (snapshot.hasData) {
            return const Center(
              child: Text('No torch available.'),
            );
          } else {
            return const Center(
              child: CircularProgressIndicator(),
            );
          }
        },
      ),
    );
  }

  Future<bool> _isTorchAvailable(BuildContext context) async {
    final scaffoldMessenger = ScaffoldMessenger.of(context);

    try {
      return await TorchLight.isTorchAvailable();
    } on Exception catch (_) {
      scaffoldMessenger.showSnackBar(
        const SnackBar(
          content: Text('Could not check if the device has an available torch'),
        ),
      );
      rethrow;
    }
  }

  Future<void> _enableTorch(BuildContext context) async {
    final scaffoldMessenger = ScaffoldMessenger.of(context);

    try {
      await TorchLight.enableTorch();
    } on Exception catch (_) {
      scaffoldMessenger.showSnackBar(
        const SnackBar(
          content: Text('Could not enable torch'),
        ),
      );
    }
  }

  Future<void> _disableTorch(BuildContext context) async {
    final scaffoldMessenger = ScaffoldMessenger.of(context);

    try {
      await TorchLight.disableTorch();
    } on Exception catch (_) {
      scaffoldMessenger.showSnackBar(
        const SnackBar(
          content: Text('Could not disable torch'),
        ),
      );
    }
  }
}