support for fingerprint device

by jawosis » Fri, 05 Jun 2009 03:06:27 GMT

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I would like to use a fingerpint scanner connected to an android
smartphone but have not found any device supporting Android.
Does anyone know a fingerprint device capable of that?


support for fingerprint device

by abbe » Sat, 19 Jun 2010 03:12:35 GMT

 Does android has support for fingerprint devices?
if not, how should I go about developing a driver for the device and
put it in mobile device running android.



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1. MotionEvent and KeyEvent causing excessive garbage collect (GC) calls

Hi folks,

I'm running into some issues with input events and garbage collection,
or more precisely object allocation.  I am creating a game and have
pretty much got my head around the OpenGL environment.  I've digested
all the relevant material I could find regarding performance, memory
allocation etc (and watched the excellent presentation by Chris Pruett
I've pretty much eliminated any object allocations after initial setup
from my game (which is still in its infancy), but I'm still getting a
bunch of GC calls, like this:

DEBUG/dalvikvm(52): GC freed 10398 objects / 880928 bytes in 139ms

This is killing my frame-rate and creating a jittery experience, which
is no good.  Running DDMS I see that the culprit is MotionEvent and
KeyEvent.  Allocations like:

656     float[] 3       android.view.MotionEvent        <init>
656     float[] 3       android.view.MotionEvent        <init>
656     float[] 3       android.view.MotionEvent        <init>
656     float[] 3       android.view.MotionEvent        <init>
656     float[] 3       android.view.MotionEvent        <init>

(there are many more, this is just a snapshot)

It seems that every time a MotionEvent is recorded, a float array is

I am just using the onKeyDown event in the main Activity to broker the
key event to my game thread.  I'm also sleeping (16ms) in this method
call (as per Chris Pruett's recommendation) to save in excessive

Is there something special I can do to eliminate these allocations?
Perhaps there is an alternate way of obtaining key events and or
trackball events? (which also are a cause of several allocations)

Thanks in advance...


2. Join Us In Protesting!

Dear All!

What is this:
Software is basically a language. An algorithm is an expression of an idea. 
Patenting it would be like patenting individual words of English. A huge 
hindrance to innovation. Copyright is ok! not software patent!

Some Weird Software Patents:

   1. Tab indexing
   2. Page-up, Page-down
   3. Progress Bars
   4. Generate Key Via SMS
   5. Order by cell phone

It means you can not use them, in your products.There are many more!

Why Shoud You Sign: This will make our illiterate politicians think before they 
make it a law, which will hamper the Indian software market. Please join us in 
protesting against Software patents! Click here

Note: Most of the countries around the world (as of now) do not allow for it,
including the EU.

Request: Please forward this to all the Indian s/w professionals you know!
Rohit Mishra
Bangalore, India



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