Skip navigation
Laurence MacNeill
Laurence MacNeill
Currently Being Moderated

iOS Mobile App, Flex 4.6, QR-Code reader...

Jun 4, 2012 6:14 PM

Tags: #flex #ios #4.6 #qr

Has anyone ever been able to actually get an iOS QR-Code reader app to work correctly?  I've looked at literally DOZENS of blog-posts -- they're all based on two posts (http://www.remotesynthesis.com/post.cfm/adding-a-qr-code-reader-in-fle x-on-android and http://www.libspark.org/wiki/QRCodeReader/en) so they're all pretty much the same -- and NONE of them seem to work on a 5th generation iPod Touch with iOS 5.1 and Flex 4.6 (the examples are all Android devices and Flex 4.5.1).  I've tried every last permutation of each of those two posts that I've found, and read every comment on all of them, and I can't get any of them to work at all on this stupid iPod Touch...

 

So -- has ANYONE written a FUNCTIONAL qr-code reader for an iOS device using Flex 4.6?

 

Any help you can give would be appreciated...

 

Thanks,

Laurence MacNeill

Mableton, Georgia, USA

2648 Views   13 Replies   Latest reply: AntuanSoft, May 10, 2013 1:21 AM
 
Replies
  • iBr3nt
    Currently Being Moderated
    1. iBr3nt,
    Jun 4, 2012 6:29 PM   in reply to Laurence MacNeill
    Report

    Hi,

     

    Yes, I've got QR code reading working on iOS using Flash Builder 4.6. It works fine for me on my iPhone 4, and iPad 3. What problems are you having specifically?

     

    iBrent

     
    |
    Mark as:
  • Laurence MacNeill
    Currently Being Moderated
    2. Laurence MacNeill,
    Jun 4, 2012 6:40 PM   in reply to iBr3nt
    Report

    Well, the libspark.org library I linked above never even compiles -- way too many errors to list here...  I've gone through all its source-code and still can't get rid of all the errors, so I gave up on it...  This seems like it would be a great library, if I could get it to compile successfully, but as it is, it's not going to work.  (EDIT: If anyone out there actually *has* gotten this library to work with Flex 4.6, please let me know how you did it, thanks.)

     

    The code from the remotesynthesys.com post will actually complie, and display the video and everything, but when I click the button to take the picture it just sits there for about 5 seconds (maybe a bit more), then comes back with "nothing decoded."  It simply *never* decodes the bar-code.  And it's *extremely* slow, even when I do the slow, highly-optimized compile.  Its performance is not good at all, even if it were decoding successfully...

     

    Do you have any source-code I can see?  Are you using the ZXing library to decode, or a different library?

     

    Thanks,

    L.

     
    |
    Mark as:
  • iBr3nt
    Currently Being Moderated
    3. iBr3nt,
    Jun 4, 2012 6:46 PM   in reply to Laurence MacNeill
    Report

    I'm using ZXing and it isn't slow for me (certainly not 5 seconds to process). I haven't tried libspark. Let me put together an example based on an app I've written (haven't released it for iOS yet ;-).

     

    iBrent

     
    |
    Mark as:
  • Laurence MacNeill
    Currently Being Moderated
    4. Laurence MacNeill,
    Jun 4, 2012 6:50 PM   in reply to iBr3nt
    Report

    That will be amazingly helpful, thank you...

     

    Thanks a bunch,

    L.

     
    |
    Mark as:
  • iBr3nt
    Currently Being Moderated
    5. iBr3nt,
    Jun 4, 2012 8:08 PM   in reply to Laurence MacNeill
    Report

    I've posted an example .fxp project based on the remotesynth.com example. You can download the Flash Builder 4.6 file here --> http://www.tutorialsbyibrent.com/assets/QRReader.fxp

     

    One thing I didn't try in order to speed up this example is to comment out the System.gc(); calls to see if that helps.

     

    iBrent

     
    |
    Mark as:
  • Laurence MacNeill
    Currently Being Moderated
    6. Laurence MacNeill,
    Jun 4, 2012 9:04 PM   in reply to iBr3nt
    Report

    Didn't work...  Exactly the same thing -- nothing decoded...

     

    I wonder if the camera on the iPod Touch is not good enough to read QR-Codes?  Maybe there's something set up incorrectly in my Flash Builder?  I'm running on Windows and you're running on a Mac, yes?  Maybe that's the problem...  I have no idea at this point...

     

    If you've got any other ideas, I'm all ears....

     

    Thanks a bunch for your help so far.

     

    L.

     

    EDIT:   After re-trying about 20 or 30 times, I finally got it to scan ONE bar-code...  So, yeah, I guess it does work, just not very well -- at least on the 5th-gen iPod Touch...  It's got to be a camera issue, I believe.

     
    |
    Mark as:
  • Laurence MacNeill
    Currently Being Moderated
    7. Laurence MacNeill,
    Jun 4, 2012 10:02 PM   in reply to Laurence MacNeill
    Report

    Ok -- I've done some more messing around with the libspark.org library I linked above...  When I run it on the emulator, I've finally gotten it to the point where I get no bugs (but my web-cam can't focus near enough to scan the bar-codes, so I'm still unable to scan on the emulator, even though there are no bugs...)

     

    When I run it on the iPod Touch, the following error pops up in the library's AdaptiveThresholdFilter.as file, line 62: "Error #1010: A term is undefined and has no properties."   Why would this give me an error on the device, but not on the emulator?  What is missing here?  Can someone check out the libspark.org library I've linked above and tell me what I'm missing?  It's very weird that it would not give an error in the emulator, but would give it to me on the device itself...

     

    Thanks,

    L.

     
    |
    Mark as:
  • iBr3nt
    Currently Being Moderated
    8. iBr3nt,
    Jun 5, 2012 8:40 AM   in reply to Laurence MacNeill
    Report

    Hmmmm, well I don't have an iPod Touch to compare with, but I know that

    the code works on my iPhone 4 and iPad 3. Sometimes I have to scan the

    code a few times, moving the camera slightly to fit the code into the

    video area. Blurry codes won't decode well either. Have you downloaded

    other QR apps and tested those on your device? Maybe it is the camera

    that's the problem.

     

    iBrent

     
    |
    Mark as:
  • Laurence MacNeill
    Currently Being Moderated
    9. Laurence MacNeill,
    Jun 6, 2012 9:58 PM   in reply to iBr3nt
    Report

    Yes, I've checked a couple of free QR-Code reading apps on this iPod Touch -- they all seem to work OK.  Not perfectly, but OK...  Far better than anything I've written, that's for sure.  :-)

     

    The camera is definitely a problem, though -- that's why (I'm sure) the basic ZXing decode library isn't working well...  It needs something more -- which is what the LibSpark library provides...  And that's why I'm trying (again) to get this LibSpark library working...

     

    I've narrowed down the problem to a file called AdaptiveThresholdFilter.as, which has a line in there that embeds a file called adaptiveThreshold.pbj -- this .pbj file is an Adobe Pixel Bender file (or something like that, anyway).  It seems that this file is not actually embedded into the package that gets exported to the mobile device, so when the app runs on the device, it fails because it can't find that file...

     

    So, I guess my new question is this:  How does one embed a .pbj file into a mobile app?  I _hope_ that if I can figure that out, this LibSpark library will work, and my problems will be solved...  I hope...

     

    L.

     
    |
    Mark as:
  • David_Welch
    Currently Being Moderated
    10. David_Welch,
    Oct 25, 2012 11:54 AM   in reply to Laurence MacNeill
    Report

    Lawrence:

    Any look doing thiw with LibSpark?

     

    I'm trying to do the same thing for mobile, have iBr3nt's code working, but, it takes a lot of tries to get the QR to be recognized.

     

    Thanks,

    David

     
    |
    Mark as:
  • Laurence MacNeill
    Currently Being Moderated
    11. Laurence MacNeill,
    Oct 25, 2012 12:07 PM   in reply to David_Welch
    Report

    No, I've had no luck with LibSpark, unfortunately... It would be nice if LibSpark would work for me, because it seems like a great library, but it's just too darn slow on this iPod Touch that I'm working with...

     

    L.

     
    |
    Mark as:
  • marciofermino
    Currently Being Moderated
    12. marciofermino,
    Jan 27, 2013 11:52 AM   in reply to Laurence MacNeill
    Report

    Friend's please I need one example for reader code bar.

     

    Please enter contac skype marciofermino

     

    I type from Brazil.

    Thank's.

     
    |
    Mark as:
  • AntuanSoft
    Currently Being Moderated
    13. AntuanSoft,
    May 10, 2013 1:21 AM   in reply to iBr3nt
    Report

    The project (http://www.tutorialsbyibrent.com/assets/QRReader.fxp) has been imported and compiled in a Flex 4.6 builder and compile perfect. Then it has been tested in the emoulator and works!!!! and instaled un a Android 2.3.6 and works perfecty (the camera and the qr recognition).

     

    Thanks!!!!! Ibrent

     
    |
    Mark as:
Actions

More Like This

  • Retrieving data ...

Bookmarked By (0)

Answers + Points = Status

  • 10 points awarded for Correct Answers
  • 5 points awarded for Helpful Answers
  • 10,000+ points
  • 1,001-10,000 points
  • 501-1,000 points
  • 5-500 points