Hardware Button Listener

Hardware Button Listener is a Flutter package that allows you to listen to physical hardware button presses on Android devices, such as volume buttons or other device-specific keys like devices with attached QRCODE read button.

Features

• Detect physical hardware button presses.
• Provides key information, such as button name and key code.
• Easy-to-use API with a reactive stream-based approach.

Installation

Add the following dependency to your pubspec.yaml file:

dependencies:
  hardware_button_listener: latest_version

Run the command to fetch the package:

flutter pub get

Usage

Here's an example of how to use the Hardware Button Listener package:

Full Example

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _lastButtonPressed = 'No button pressed yet';

  final _hardwareButtonListener = HardwareButtonListener();
  late StreamSubscription<HardwareButton> _buttonSubscription;

  @override
  void initState() {
    super.initState();
    // Start listening for hardware button events
    startListeningToHardwareButtons();
  }

  @override
  void dispose() {
    // Cancel the subscription to free up resources
    _buttonSubscription.cancel();
    super.dispose();
  }

  // Listen for hardware button events and update the UI
  void startListeningToHardwareButtons() {
    _buttonSubscription = _hardwareButtonListener.listen((event) {
      log(event.buttonKey.toString());
      log(event.buttonName.toString());
      setState(() {
        _lastButtonPressed = event.buttonKey.toString();
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Hardware Button Listener Example'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              const SizedBox(height: 20),
              const Text(
                'Last button pressed:',
                style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
              ),
              const SizedBox(height: 10),
              Text(
                _lastButtonPressed,
                style: const TextStyle(fontSize: 16, color: Colors.blueAccent),
                textAlign: TextAlign.center,
              ),
            ],
          ),
        ),
      ),
    );
  }
}

Key Concepts

• HardwareButtonListener: The main class that provides a stream for listening to hardware button events.
• HardwareButton: A model representing the button press event, containing properties like buttonKey and buttonName.

Handling Events

Use the listen method of HardwareButtonListener to subscribe to button press events and handle them as needed.

_hardwareButtonListener.listen((event) {
  print('Button Key: ${event.buttonKey}');
  print('Button Name: ${event.buttonName}');
  if(event.buttonKey == 120){
  doSomething();
  }
});

Important Notes

• This package currently supports Android only.
• Ensure proper permissions and configurations are set if required by your specific device.

Contributions

Contributions are welcome! Feel free to open issues or submit pull requests on the GitHub repository.