Compilation error

[xkraty]

Hello,

I've added "react-native-scan-doc": "git+https://git@github.com/beast/react-native-scan-doc.git" and npm install the package; I both tried manual and linking installation and it fail at compiling, it might something stupid to you but I'm not so used about Android.

Console output:

Scanning 696 folders for symlinks in /Users/xkraty/projects/bridge-mobile/node_modules (18ms)
JS server already running.
Building and installing the app on the device (cd android && ./gradlew installDebug)...
Incremental java compilation is an incubating feature.

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/xkraty/projects/bridge-mobile/node_modules/react-native-scan-doc/android/build.gradle' line: 36

* What went wrong:
A problem occurred evaluating project ':react-native-scan-doc'.
> Project with path ':openCVLibrary320' could not be found in project ':react-native-scan-doc'.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Thanks in advance
Chris

[beast]

Hi @xkraty. Thanks for opening the issue. This is something I wanted to add in the readme. Getting Opencv package to play nicely with RN out-of-box is almost impossible. Believe me I had tried make it as dummy as possible to the best of my knowledge. But the reality is setting up opencv to work nicely with Android itself is a challenging enough task. I suggest you look at a few examples to understand how OpenCV works with Android first then proceed to manual installation.
https://blog.nishtahir.com/2015/11/11/setting-up-for-android-ndk-development/

Try out my Android Native Scan Doc sample if you want to first check out how the scan doc helps you to crop a doc in image.

Again, I am open to have some help from the community to improve the package documentation. Thanks for opening the issue. I understand most of the scan doc package out there cost a fortune but OpenCV is no easy thing to deal with and I would like to have some serious help.

I myself unfortunately is tied up with other work of my own. Will look into this seriously once I got time and resource. Thanks.

[ducpt2]

@xkraty Can you make it work? Thanks.

[xkraty]

@ducpt2 no sorry, we dropped it in favor of scanbot even if it require a license

[beast]

@xkraty I was asked to pay 20k Euro a year that is exactly why I started this repo...

[xkraty]

@beast I am sorry I didn't mean minimize your work or blame you since you did a great job here, we just didn't have enough skill/time to dig into Android and the company wanted it fast, so they'll pay for.

[khrizt]

@beast I was following this repo because I'm migrating mobile apps to react native and one feature the Android app has is a document Scanner done with OpenCV. I managed to get it to work in Android and we have released it. I could help if I can. What would you need?

I'm thinking that you probably need a installation instructions on how set up the OpenCV library in android and checking that it works ok, anything else? I will try to get into this as soon as I can.

[beast]

@khrizt Yes. Please help on the installation instructions. That will be greatly appreciated. Another thing I was wondering is how to get OpenCV installation work with this package automatically. Thanks!

[khrizt]

@beast Ok, I'll look into it and let you know.

[beast]

@xkraty No offence taken. I did understand the frustration of people not able to get it working. Unfortunately I couldn't invest more time to explain how exactly this works due to my own work. Really hope I could get some help or I could manage to find some time for this.

[ducpt2]

@beast I very appreciated your work :) Thanks.
@khrizt Hope you can help, thank you so much. I have try to bridge from this repo: https://github.com/Aniruddha-Tapas/Document-Scanner, but no luck, i am a iOS developer switch to React Native, i have no idea about Android. :(

[khrizt]

Ok, I managed to compile and run the example but with a couple of errors, I found an error here: scanDocPackage.onActivityCreated(activity); because it says that the method is not found, what's the purpose of that?

Also have you considered using the camera built-in in OpenCV instead of a react native module?

Sorry I didn't mentioned you @beast

[ducpt2]

@khrizt thank you for your effort. Pls let us know if you can fix it :) Thanks.

[beast]

@khrizt Thanks for the looking into this. It has been quite a while ago so it could be somewhere down the road of RN changes that this is no longer needed. I did it because back then I had a problem retrieving the activity from Android for RN consumption. I had seen built-in openCV like an iOS lib that does this but the edge detection was pretty bad when I mix with other objects. Anyway, I know my detection code is good in Native Android, see https://github.com/beast/android-opencv-scan-doc

And I had built RN lib before, but I am really not sure how to make openCV play nicely with RN. Do you mind sharing what you did with your own project? Thanks.