Can't scan QR-code on Android 6 and 8

[yuriy-budiyev]

Nothing happenson Android 6 and 8, but works fine on 4.4, tested on QR-code.

[yuriy-budiyev]

Somehow, it started to scan on 6, but still dead on 8.

[tempanyman]

I also have issues on android 7. I'm using a nexus 5x, api 24 and 25. Works fine on API 23 (Marshmallow).

[dm77]

Hi @yuriy-budiyev, few questions for you:
a.) What devices are you testing on?
b.) Are you using zbar or are you using zxing?
c.) Are you testing using the zxing-sample or zbar-sample? If not, can you test the samples on your devices as well?

Thank you

[tempanyman]

Not OP, but some more info it it helps:
I am using zxing, and I tested with the zxing-sample to no avail on my Nexus devices.

[yuriy-budiyev]

Device: LG Nexus 5X
Scanner: zxing
Config: targetSdk 26, build tools 26.0.1, Android Studio 3.0 beta 1, support libraries 26.0.1

I tested on many QR-codes. The thing is that the same code is scanned well on Galaxy S4 mini with Android 4.4, and not scanned on Android 8

Where I can find the sample?

[yuriy-budiyev]

Official zxing app works well on the same codes on 8

[dm77]

@tempanyman thank you. Does it happen on all your Nexus devices? Because I have the zxing-sample working fine on my Nexus 5 phone. Nexus 5x is a different issue though (see below)

@yuriy-budiyev As you might already know Nexus 5x camera orientation is reverse landscape and apparently that causes issues with scanning in portrait mode. The fixes in version 1.9.4, 1.9.5 and 1.9.6 were all aimed at fixing Nexus 5x portrait mode scanning. See the pull request #315 for example.

So are the issues here limited to just Nexus 5x then? If so, does scanning work when you scan in landscape mode? Thanks for your help

[yuriy-budiyev]

Yes, it works in landscape mode.
But my app needs portrait mode.

[yuriy-budiyev]

But earlier versions worked well on nexus 5x and android 7 in portrait mode

[yuriy-budiyev]

Can you fix this please?

[dm77]

@yuriy-budiyev - For now, can you revert back to whatever version that was working for you previously? There are no huge code improvements between 1.9.3 and 1.9.7. The only change was the pull request that tried to fix Nexus5X. So may be 1.9.3 should resolve your issue.

[yuriy-budiyev]

Hi, I coundn't wait, code scanning is critical for my app. So I solved the rotation problem in my lib (it's unfinished), you can see the code here. Hope it help you c;

[dm77]

@yuriy-budiyev Thanks for pointing me to your repo. Would it be possible for you to submit a pull request?

[dm77]

@yuriy-budiyev Also to be clear, the issue was only limited to Nexus5x device.

[yuriy-budiyev]

I don't know how you can just pull from my repo, or I don't understand you. I think this problem can't be limited to nexus 5x, because any device has camera rotation in portrait mode (for example). So it would be better to rotate image from camera before giving it to the decoder.

[dm77]

@yuriy-budiyev It is only limited to Nexus 5x since it has reverse landscape camera orientation. For example see #315

1.9.7 works on 5 devices I personally tested on and there are many who confirm that it works fine on their devices in #336 and #339

Regarding the pull request, I was just hoping you could submit something similar to #315. Seems like you are not aware how that works.

Thank you anyway.

[dm77]

You can also find similar reports related to the Nexus5x devce in the official zxing repo zxing/zxing#484

[dm77]

@yuriy-budiyev I just released 1.9.8 which resolves the issue on Nexus 5x. Can you please check if you are still interested? Thank you

[filipiandrader]

Doesn't works on Samsung S8 with API 26. I'm using ZXing scanner. The problem is when I open my Activity where I'm using the scanner, I don't have any camera (appears a blank screen) but on API 22 works fine!

Blank Screen on API 26:

API 22:

[harmansoft]

@filipiandrader I have Exact same issue and search entire web for it, but i cannot find anything useful.please if you find the answer let me now

[filipiandrader]

@Zirocool I didn't find anything.

[hrshs]

I have same issue in tablet lenovo TB-7304.

[CAA0558]

Please provide the camera permission, it works. (Setting-> apps-> appname->permission->camera->enabled)

[chrisegb]

Hi @dm77 I am working with the same functionality to read a QR code, unfortunately my app stops running showing a unsatisfied link error in the the line 45, in this line I have an initializer:

System.loadLibrary("iconv");

I have been tested in three devices a Motorola with Android 7, another Motorola with Android 6 and a Panasonic with Android 5, regarding to this, it works perfectly in Android 5 but does not in Android 7 or 6.

I found that for Android 6 and further I have to update the files into the jniLibs folder with the files that I found at [1], my main worry here is if this files will impact another part of my application or they are just related to ZBar scan reader. Did you have tested the ZBar scan reader in Android versions higher than 5?

Does anybody know if "update the files into jniLibs folder" is the correct solution for this issue [2].

Regards.

[1] https://github.com/dm77/barcodescanner/tree/master/zbar/src/main/jniLibs
[2] https://stackoverflow.com/questions/33152903/zbar-barcode-scanning-library-not-working-when-using-target-sdk-version-23-in-gr