Hello Fabrice

Thank you for your response. I am sorry for the delay in mine but I did not 
receive a reminder that the post was approved and posted in this list.

Please see below:

> > Android uses intents and it is possible to launch a specific QR-Reader or 
> > let the user select from the installed apps that can handle this sort of 
> > activity.
> > I was happy to spot the Firefox OS - Web Activities API, but they are 
> > 'ring-fenced' :( and the allowed ones do not include QR-code reading.
> 
> 
> What do you mean by 'ring-fenced'? Any app can implement its own
> 
> activities, and expose them to any other app. We don't whitelist anything.
>From this: https://developer.mozilla.org/en-US/docs/Web/API/Web_Activities
There are certain firefox OS and firefox for android activities that are 
readily available by the system and there is no hint that any of them could be 
starting a QR reader. (Please also see below).
 
> > Is there a way to query installed applications for the ones that can handle 
> > QR reading? There are quite a few of them on the marketplace but none 
> > actively advertises its ability as an activity handler. (Is there one that 
> > does?)
> 
> No. The whole point of activities is to not have such a strong coupling.

In Android, I can do something like: 
    
    Intent intent = new Intent("com.google.zxing.client.android.SCAN");
Then populate the intent with parameters, start it and wait for the result.
Doing so, I am using functionality that is exposed by another application.

In FirefoxOS, I cannot use "com.google.zxing.client.android.SCAN". Therefore, I 
am asking how can i probe FirefoxOS for those installed applications that 
expose their QR Reading functionality so that I can start it from within my 
Firefox OS application with a Web Intent. I hope the question is more clear now.

> > Finally, since firefoxOS apps can be installed as stand-alone(ish) on 
> > Android, can i use an Android intent's URI to launch an Android Intent and 
> > retrieve its result within my code from firefox OS?
> 
> 
> 
> I don't think our intent <-> activities support on android allows that
> 
> yet, but I may be wrong.

It would be great to see this kind of interaction between FirefoxOS and Android.


Looking forward to hearing from you
AA
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