App to listen to the phone's volume buttons' events

pbotas 0
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I need to create an app to listen to the phone's volume buttons' events. As far as I could find and test, a simple page with javascript doesn't trigger those events, using something like this: window.addEventListener('keydown', keyDownHandler) Does making it a PWA change anything? The requirement is only for Android. Triggering when the app is closed or when the phone is locked is a big plus.

The easiest alternative I think can do the job is React Native. Is it right?

progressive-web-apps javascript android
1 Answers

There're multiple platforms to archive this and the easiest way I think fit you is:

1- Ionic:

It's based on cordova and it's the closet platform to PWA that you already using and you can handle volume buttons using this library from here.

cordova-plugin-volume-buttons.

window.addEventListener("volumebuttonslistener", onVolumeButtonsListener, false);
    
    function onVolumeButtonsListener(info){
        console.log("Button pressed: " + info.signal);
    }

2- React Native

This will give you the best performance and you can handle volume buttons using this library from here.

react-native-volume-control

import VolumeControl, {
  VolumeControlEvents
} from "react-native-volume-control";

VolumeControlEvents.addListener(
      "VolumeChanged",
      this.volumeEvent
    );

You can check if the app closed or gone to background using AppState like this example:

import {AppState} from 'react-native';

useEffect(() => {
    AppState.addEventListener('change', handleAppStateChange);
    // remove subscription
    return AppState.removeEventListener('change', handleAppStateChange);
}, []);

const handleAppStateChange = (nextAppState) => {
   // closed
   if (nextAppState === 'inactive') {
   console.log('the app is closed');
  }   else if (nextAppState === 'background') {
     console.log('the app on background');
  } 
 }
Louay Sleman0
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