CODEWITHSUNDEEP
javascriptmobile
Jiří Endršt
Jiří Endršt

Reputation: 31

Detect unlock screen using Javascript on website

I'm trying to find out answer to my problem, but Google and other sites can't help me.

I'm building mobile website and I need redirect to homepage where browser is reactivated (unlock screen or open from minimalized). Is it possible?

Thanks a lot

Upvotes: 0

Views: 3220

Answers (2)

Barkermn01
Barkermn01

Reputation: 6842

No in short,

There is no specified way to detect a lock screen as such there is nothing in HTML / Javascript.

However you could use PhoneGap Cordova and create a mobile application, I have a class to make events in PhoneGap easy

then you can use Application paused if you still want your application to only work online you can use an AJAX loader to load the content as using PhoneGap Cordova dose not hit the Cross-Origin domain policies of JavaScript normally

This i think is the only alternative you can use and it would require quite a bit of work to make your site become a mobile application.

EDIT:

Sorry a bit of Detail. PhoneGap Cordova allows you to build mobile applications HTML, CSS & JavaScript and provides some new events into JavaScript to help with mobile applications as well as the ability to call upon the hardware of a phone you can find more out at http://phonegap.com/ https://cordova.apache.org/

Another Thought:

Thanks to @jeroenk for this idea it just came to me after reading his you might be able to do a little hack fix.

on your page

window.timestamp = Math.round(new Date().getTime()/1000);

setInterval(4000, function(){
  var curTime = Math.round(new Date().getTime()/1000);
  if(curTime > window.timestamp+5){
     // do redirect
  }
  window.timestamp = Math.round(new Date().getTime()/1000);
});

I'm not 100% but i think Javascript gets halted when the browser on a mobile is not open, so lock screen on minimized so the above will check every 4 seconds that the Javascript has not become out of sink in (allowing for 1 second extra in case there is an application lag it would take some one more than 1 second to get though lock screen unless it was the user using the phone so it was not put down)

As i say this is a thought it might not work.

Upvotes: 1

Jeroen K
Jeroen K

Reputation: 10438

Maybe you can do something with window.onunload event

Upvotes: 1

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