[BUG 🐛] Could not get unknown property 'kotlinVersion'

[longb1997]

Hello, i just installed this lib and run yarn android, but it's can't build. Only happen on Android

error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup.
Error: Command failed: ./gradlew app:installDebug -PreactNativeDevServerPort=8081

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/mobile/dev/mini-app-checkin/node_modules/react-native-vision-camera-face-detector/android/build.gradle' line: 17

* What went wrong:
A problem occurred evaluating project ':react-native-vision-camera-face-detector'.
> Could not get unknown property 'kotlinVersion' for object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.

Device:

• OS: Android

package.json file:

[longb1997]

holy sh*t, @luicfrr your repo was invaded by bots

[luicfrr]

Can you please check if this fix this issue?

[michelorth]

same problem, I try #71 (comment) but not work

[ibrahim-developes]

Tried on a clean new project this did not came up

[c-goettert]

I am facing the same issue. The issue is gone after I set a Kotlin-Version in my android/build.gradle, e.g.:

buildscript {
    ext {
        buildToolsVersion = "34.0.0"
        minSdkVersion = 26
        compileSdkVersion = 34
        targetSdkVersion = 34

        kotlinVersion = "2.0.0"
        // We use NDK 23 which has both M1 support and is the side-by-side NDK version from AGP.
        ndkVersion = "23.1.7779620"
    }
    ...

However, after I added a Kotin-Version, I am facing issue #71 (exactly the same error). The suggested solution (cleaning gradle cache) does not fix it for me. I tested a lot of kotlinVersions (1.6,1.7,1.9,2.0,...) but none of them did work.. I am working on a bare non-expo RN Project (RN-Version 0.71.19).

[ibrahim-developes]

Kotlin veriosn in node_modules/react-native-vision-camera-face-detector/android/build.gradle' line: 17
should be same as in your project's build.gradle

below is an example

build.gradle of project

ext {
    buildToolsVersion = "34.0.0"
    minSdkVersion = 26
    compileSdkVersion = 34
    targetSdkVersion = 34
    ndkVersion = "25.1.8937393"
    kotlin_version = "1.8.0"
}

node_modules/react-native-vision-camera-face-detector/android/build.gradle' line: 17

def kotlin_version = safeExtGet("VisionCameraFaceDetector_kotlinVersion", "1.8.0")

this should resolve the issue

[c-goettert]

Thanks for your answer. The kotlinVersion in the file you mentioned was "2.0.0", which I also tried but I still faced the error. I think for me it was also related to the android compileSdkVersion(34). With the help of this comment I found out that I also needed to downgrade vision-camera to version to 4.3.1 for my RN-version (0.71.19). Now it compiles successfully 🎉

[luicfrr]

I think this issue is solved, right?
I'm closing it now but if the problem still happens maybe we can reopen it.
I'll also add it to Troubleshooting item on readme.