Problem to build the javacv-camera-preview project

[Menegussi]

Hi! I don't know how to solve this problem below. 

> Configure project :app
NDK is missing a "platforms" directory.
If you are using NDK, verify the ndk.dir is set to a valid NDK directory.  It is currently set to C:\Users\andre.menegussi\AppData\Local\Android\Sdk\ndk-bundle.
If you are not using NDK, unset the NDK variable from ANDROID_NDK_HOME or local.properties to remove this warning.

I've tried some tips found on google but I dont know how to fix, it.

Can you help, me?

Regards, 

André

[Samuel Audet]

That sample project hasn't been updated recently. Try this one instead:
https://github.com/bytedeco/sample-projects/tree/master/JavaCV-android-example

[Menegussi]

Hi Samuel, thanks for the response.  This one I'm able to execute in my Moto G-10 phone.

Do you have some updates on  javacv-camera-preview project ?

My idea is to use a cell phone or a tablet to count the face detections and other features. 

After some tries on javacv-camera-preview project I was able to compile and run in the emulator with some errors and close the app, bur if i try to install in my Moto G-10, the messages below apears on logcat:

Installation did not succeed.
The application could not be installed: INSTALL_FAILED_NO_MATCHING_ABIS

List of apks:
[0] 'C:\Users\andre.menegussi\Downloads\sample-projects-master\sample-projects-master\javacv-android-camera-preview\app\build\outputs\apk\debug\app-debug.apk'
Installation failed due to: 'Failed to commit install session 345911349 with command cmd package install-commit 345911349. Error: INSTALL_FAILED_NO_MATCHING_ABIS: Failed to extract native libraries, res=-113'

DO you have any idea what is the problem?

Thanks.

André

[Samuel Audet]

We can more simply add just the source files from that project into the
other already working project.

[Menegussi]

Hi! 

I will try it.

Do you have any idea why the project runs on the emulator and not in the smartphone, in the case of camera preview project?

Thanks