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I was browsing the web and I saw an application that claimed to scan for user's fingerprints so I thought I should give it a try, the app worked well and I was amazed! does anyone know how this app reads user's fingerprint? how is this possible on android? any tutorial or hints or any open source project? I think this will help a lot of developers.
I am guessing the app you are referring to is this. If so, it doesn't actually read your fingerprint. It just plays beeps and vibrations in a certain order and you have to know when to lift your finger to unlock the phone.
To be honest, I don't think it could read your fingerprint without a finger print scanner. The touch screen isn't fine enough to read the individual ridges in your fingerprint.
i don't think that it would be possible with actual hardware, however there are some interesting gadgets for that, to be connected with your device via blue-tooth. Have a look here : BlueFIN
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I'm looking to write an application which allows an alternative lock screen for Android. I've seen posts around here on SO as well as applications in the Play Store, but I can't seem to find any APIs for doing it on developer.android.com.
How do you write a replacement lock screen for Android?
To summarize what others have said on here and what similar questions have asked:
TL;DR No, you cannot easily write a replacement for Android's lock screen.
The longer version: In order to write a lock screen replacement, you'd need to either create a custom ROM which bundles your lockscreen or you'd need to wade through undocumented Android and device-specific APIs to work around this problem. Here's hoping that Android M will allow us to write lock-screen replacements.
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Is there a tool that does android remote logging for Android apps, kinda like Testflight's for IOs ?
I found Deploy Gate very helpful for me.
You can do remote loggin and also trac application launches, crash reports.
Also, TestFlight is just about to launch support for Android: https://testflightapp.com/android/ so you might want to sign up to be informed when they do.
I've used ACRA in my projects with great success. You can find that at: http://acra.ch/ It works great when used in the debugging process, but I remove it before publishing.
It can be configured to automatically send a report on a crash, if the app enters a particular state, via a trigger (like a button a user could press) or what have you. For my purposes, I usually have it trigger on a crash, and I add an option to the menu to send a Force Debug Report if the tester feels like the app is doing something odd, but isn't crashing.
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I am trying to develop a mobile tool to check-in via face. This application is intended for employee place and time log-in. The app will simply take a picture or scan a face, look for a match in the database, and log-in the employee, then another employee will simply show his face to the camera to log-in for his/her shift.
I am looking for available face identification products, suitable libraries or any other suggestion. Thanks!
Lambda Labs Face API is what you need
http://api.lambdal.com/?ref=homepage
It's still in beta though. It's free for first 4000 detection and 1000 recognition per month :)
On Android you could use the FaceDetector class already available in the OS.
You can find an example here.
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I wanted to make video demo of my application in order to present. How can i make my application video when it running and open on android Tablet.
I've tried to come up with ways to do this to no avail. Best I've ever been able to achieve is stick your device in front of a nice camera.
However this http://www.bluestacks.com/ seems like it might be promising for this purpose once it is released. If you can run your apps on a windows machine (and it is much better than the emulator) then you could record that section of your screen with something like Fraps.
Edit: Bluestacks has since opened up for beta. For me it runs similarly to the emulator so does not provide a whole lot of benefit for the purposes of recording your applications. If you don't have a development environment with an emulator set up already though bluestacks will be ready for you to actually start recording quicker.
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I've done some searching around and haven't found any good references for non-touch events provided to mobile browsers. Does anyone know of any good resources for what tilt events are supported or have experience with such things?
I'm really looking forward to adding some yaw controls.
You are looking for HTML5 DeviceOrientation and DeviceMotion events. Most modern smartphone browsers support these events now.
Here is a useful tutorial:
http://www.html5rocks.com/en/tutorials/device/orientation/
[edited]
Unfortunately at this time, without running as a native app, events from the accelerometer are not available.
Documentation for: Supported Events for Safari on iOS
If you want these events, consider going for a native app, and checkout Phonegap - it has what you are looking for, supported by both iOS and Adroid, plus considerably more.
Here's a quick link: to get up'n the API docs