AndroidX biometrics force fingerprint - androidx

Is it possible to force the AndroidX biometrics library to make use of fingerprint, rather than other mechanisms? Right now, some Samsung devices are forcing our app to use Iris instead of fingerprint, even if the user prefers fingerprints


Use mobile microphone from NATIVE app made with meteorjs

I thought of an use case where I would want authorized devices to automatically enable my mic and record audio for 15 seconds and send it to me.
I thought of using Meteor for this because I do not know how to make android/iOS apps.
How can I use the phones microphone from an app built with meteor?
And how to do it in a manner that doesn't require the client to give permission to the app every time it wants to access the mic?
You can accomplish these kinds of extensions into "native" land, i.e., go beyond the usual webview capabilities cordova is using, by adding plugins to your build. For the capability in question, you could check out the Capture plugin.
The documentation shows how to add such plugins to your project.

Source visibility in ionic hybrid apps

I've just started learning ionic framework. It uses web browser capabilities for building apps.
These capabilities namely HTML, javascript and CSS are client side stuff. Which on browsers can be seen with view source.
My questions is how will be the visibility of the source? Will the end user be able to see the source of the app?
If yes, is it normal for any app? Shall one be worried about the security of the source?
The visibility of the source in chrome://inspect#device , is pretty much the whole application. And no, end user cannot see the source of your application once you set and push the project to production mode.
Well, since you are developing a hybrid application, there are of course, pros and cons for each. Security might not be as strong as native apps, but development time is greatly reduced to push the app to different platforms.
If you would to do something would requires high security and non-visibility of your source , then native is the way to go. As for hybrid apps,if you need somewhere to store your data securely, you will need plugins to communicate with native platform's secure storage which might pose a security risk. But then again, even native applications can be de-compiled. The way developers tries to make it harder is via obfuscation methods.
Once u set your application to production mode, you will not be able to inspect your application anymore.
To show your web-app on chrome://inspect/#devices :
1) Make sure your web-app is running and your phone is plugged into your computer via usb with USB debugging on and your PC is trusted by the phone.
2) Under device manager, you should not have missing phone drivers. (it would look something like this)
3) ADB should not be running co-currently. And you should be able to see something like this on ur inspect page:
4) Click on inspect button and you're done! (:
You have a signed apk, when you install it on a device and inspect the device on google chrome the inspect option will not be available. Theres an easy way to do that decompile the signed apk using apktools you will get the AndroidManifest.xml file. simply add android:debuggable="true" to the tag and recompile it resign it and you will be able to inspect it. If you check the main.js file in the inspect section the source code is visible.
Hence you can use Jscrambler to prevent this (Its a paid service i too am new to it)

Is it possible redirect user to launch scanner application?

I'm writing an application to show the uploaded documents using python3-django-1.8.1. We also want to allow user to scan a document.
As you know that, there is a print dialog in javascript.
Is there any support in the browser to scan a document?
Is it possible to launch a scanner application on clients machine, using javascript/python?
"Windows Fax and Scan" on Windows machines
"Simple Scan" on linux, etc. OR
Whatever the default scanner application on respective os of the client.
Any third party python application/js plugin allow to scan a document?
I am not too familiar with a image scanning feature, but I had faced a similar issue with a barcode scanner.
You cannot actually expect something similar to printing, as printing is a browser-enabled feature whereas scanning is something a typical browser does not do.
Moreover, JS has no capability of accessing peripherals directly. What would happen if this page would be browsed by a mobile? (A scan from the camera would be fantastic but never heard of anything like it).
Having said that, there is a scanner.js SDK:
scanner.js enables any web page to acquire images from scanners using JavaScript in most desktop browsers like IE, Chrome, Firefox and more. In most cases, software install is not required and the user can enjoy a great scanning experience.
Also there is a Twain SDK:
Dynamic Web TWAIN is a TWAIN-based scanning SDK software specifically designed for web applications.
These are supposingly dealing with your issue but I haven't used them. Scanner.js demo is not even working now on my Ubuntu machine. My guess is that they are not entirely JS-based anyway (com objects and stuff).
Other things to do is to have a small Firefox plugin developed if your case is specific (such as Intranet) so to control the users' browsers.
Last, but not least, another option would be to develop and provide a small desktop app to handle scanning and uploading.
If there is any other recommendation I would love to see it.

Activity Camera FirefoxOS

I am developing an app for Firefox OS which is supposed to load the camera when
an element is touched.
I had a search on the internet but I could not find a way to do such thing unless I was to start a "web activity" and let the user choose an application to pick.
I would like to force the camera application to start and not let the user choose the app to launch. Is there a way? (I really hope so!)
Thank you for the answer in advance!
Launching the camera (app) and getting access to the camera (hardware) are two different things - depending on your needs, you may need the Camera API (as suggested by Jack) to pull images/video off the device camera hardware, or you might just want to launch the built-in camera app, so the user can interact with it (without requiring to retrieve any result, like a photo, from this interaction).
Unfortunately, both use cases are currently restricted by the permission system of Firefox OS.
Direct hardware access to the camera requires a "Certified" level permission, which prevents it to be used in third party applications. If you need this feature, your best chance is to wait until WebRTC (the getUserMedia() API) lands on Firefox OS devices, which will give you direct access to camera and microphone hardware in third-party applications (there are already some experiments on early Nightly builds of FxOS that use the WebRTC getUserMedia API on actual devices, so you it shouldn't take long before it is available to end users, too). Keep an eye on bug 750011 to follow implementation progress.
The other use case is launching the built-in camera application itself from your app. To launch an installed App on the device you need a reference to its App object, invoking the App object's .launch() method launches the selected app. Unfortunately though, currently the only way to acquiring said app object seems to be via the Apps.mgmt.getAll() function call, which lists all the installed apps on your device - scanning the list you would be able to pick the Camera app, and use its launch() method to launch it. You could see this in action in Kevin Grandon's "Matchscreen" homescreen-experiment. Unfortunately the permission system has the last word in this use case too, as the Apps.mgmt object calls, too require a "Certified" level permission (the webapps-manage permission). That is one of the main reasons why third party homescreens (like the one by Matteo D'Ignazio) can't function and actually launch apps currently. There is an ongoing discussion on relaxing the requirements on this, though, and there is work ongoing regarding third party home screens, so (in time) this should also be resolved.
As seen on the mdn page explaining App permissions, camera API is not available to third-party developers yet, but there are plans for it happening in the future.
Note: The reason that camera is limited to certified apps is that the sandbox that apps run in prevents access to the camera hardware. Our goal is to make it available to third party apps as soon as possible, but we don't have time to do that in the initial release.
You can use webRTC(getUserMedia API) in FxOS to access camera as in modern desktop browser after half a year. It will be a preffered way rather than the obsolete mozCamera API (which is not able to use for 3rd party developer).

Get a tablets(iPad or Droid) mac address?

Synopsis: I am developing a HTML5 web app that will allow tablets(iPad or Droid) to login to a server and perform various functions. The client would like a way to check the devices mac address when logging in. From what I have read, most solutions use activex objects that will not work for webkit browsers.
Question: Does anyone know a solution that would hook into a HTML5 web app seamlessly(Idealy update a hidden form element with the value upon logging in)?
I don't think there's going to be a straightforward way to do this. The web server won't be exposed to a client's MAC address unless they're on the same physical'll only see the MAC from the most recent router hop in general.
If anything exists, it's going to be a browser plugin (show-stopper on iOS). And it would probably need more than the default permissions available (I don't suspect you can enumerate network interfaces in Java, for example, without asking for elevated permissions).
If you're looking for HTML/JS only then I don't think that this is possible. It won't be exposed.
The problem is that the packets you recieve back will only contain the MAC address of the node on the last hop.
This may be possible via a plugin, but then this limits you on iOS, and possibly also Android as you'd need to provide them a way of getting the plugin first (unless you used a plugin that was installed by default).
Edit: Not that I support an app for every little thing, but it shows that easy to press app buttons sometimes tend to do better than web apps (regardless of being able to make browser shortcuts to home screens). If it is suitable, you could consider loading this within a web view on the target device from within an app, from which you can then of course access MAC addresses and whatever else you may need.
MobiThinking: Mobile applications: native v Web apps – what are the pros and cons?
Forbes: Mobile Web App vs. Native App? It's Complicated