hardware_buttons

Version GitHub license

A Flutter plugin for iOS and Android for detecting various hardware buttons.

Note: This plugin is still under development, and some APIs might not be available yet. Feedback and Pull Requests are most welcome!

Screenshots

screenshots

Features

  • Detect volume buttons
  • Detect home button
  • Detect lock(power) button
  • To be added...

Android specification

  • If you subscribe to volume button events, this plugin will inevitably request for ACTION_MANAGER_OVERLAY_PERMISSION, since we found out this was the only way to do it well in Flutter Plugin environment. We do show permission request window for you, so there's nothing you should do other than subscribing to the event channel. However, since users may be surprised why your app needs this permission, we suggest notifying users beforehand why this permission will be requested.
  • Migrated to AndroidX as of version 1.0.0. To use with original support libraries, use version 0.2.4. Note, however, pre-AndroidX will no longer be supported.

iOS specification

  • No VOLUME_DOWN events are emitted when the volume is already at its minimum. VOLUME_UP events vice versa. On the other hand, events always occur whenever user presses the button on Android.

Usage

Import the package

To use this plugin, follow the plugin installation instructions.

To use with AndroidX, install the latest version as above instructions. To use with original support libraries, install version 0.2.4 instead.

Use the plugin

Add the following import to your Dart code:

import 'package:hardware_buttons/hardware_buttons.dart';

In order to listen to volume button events, use volumeButtonEvents.listen as below:

StreamSubscription _volumeButtonSubscription;

@override
void initState() {
  super.initState();
  _volumeButtonSubscription = volumeButtonEvents.listen((VolumeButtonEvent event) {
    // do something
    // event is either VolumeButtonEvent.VOLUME_UP or VolumeButtonEvent.VOLUME_DOWN
  });
}

@override
void dispose() {
  super.dispose();
  // be sure to cancel on dispose
  _volumeButtonSubscription?.cancel();
}

Besides volume button events, there are also:

  1. Home button events, via homeButtonEvents.listen.
  2. Lock button events, via lockButtonEvents.listen.

Example

Find the example wiring in the example app.

API details

See the hardware_buttons.dart for more API details.

Issues and feedback

Please file issues to send feedback or report a bug. Thank you!

Libraries

hardware_buttons

Dart

VM

dart:ffi
Foreign Function Interface for interoperability with the C programming language. [...]

Web

dart:html
HTML elements and other resources for web-based applications that need to interact with the browser and the DOM (Document Object Model). [...]
dart:js
Low-level support for interoperating with JavaScript. [...]
dart:js_util
Utility methods to efficiently manipulate typed JSInterop objects in cases where the name to call is not known at runtime. You should only use these methods when the same effect cannot be achieved with @JS annotations. These methods would be extension methods on JSObject if Dart supported extension methods.