> Task :react-native-mmkv:configureCMakeDebug[arm64-v8a]
C/C++: CMake Warning at /Users/user/Library/Android/sdk/ndk/23.1.7779620/build/cmake/android-legacy.toolchain.cmake:416 (message):
C/C++:   An old version of CMake is being used that cannot automatically detect
C/C++:   compiler attributes.  Compiler identification is being bypassed.  Some
C/C++:   values may be wrong or missing.  Update to CMake 3.19 or newer to use
C/C++:   CMake's built-in compiler identification.
C/C++: Call Stack (most recent call first):
C/C++:   /Users/user/Library/Android/sdk/ndk/23.1.7779620/build/cmake/android.toolchain.cmake:55 (include)
C/C++:   .cxx/Debug/6r5g1950/arm64-v8a/CMakeFiles/3.18.1-g262b901/CMakeSystem.cmake:6 (include)
C/C++:   CMakeLists.txt:1 (project)
> Task :app:mergeLibDexDebug FAILED
> Task :react-native-mmkv:buildCMakeDebug[arm64-v8a]
Deprecated Gradle features were used in this build, making it incompatible with Gradle 8.0.
You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.
See https://docs.gradle.org/7.5.1/userguide/command_line_interface.html#sec:command_line_warnings
182 actionable tasks: 4 executed, 178 up-to-date
error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup.
ERROR:/app/node_modules/react-native-mmkv/android/build/.transforms/3f9c1da8ef9e9dd791ea35eabfde5b34/transformed/classes/classes.dex: D8: Type com.facebook.react.viewmanagers.RNCSafeAreaProviderManagerDelegate is defined multiple times: /app/node_modules/react-native-mmkv/android/build/.transforms/3f9c1da8ef9e9dd791ea35eabfde5b34/transformed/classes/classes.dex, /app/node_modules/react-native-safe-area-context/android/build/.transforms/c6786e6fef212d007103008b90ae9725/transformed/classes/classes.dex
com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: 
Type com.facebook.react.viewmanagers.RNCSafeAreaProviderManagerDelegate is defined multiple times: /app/node_modules/react-native-mmkv/android/build/.transforms/3f9c1da8ef9e9dd791ea35eabfde5b34/transformed/classes/classes.dex, /app/node_modules/react-native-safe-area-context/android/build/.transforms/c6786e6fef212d007103008b90ae9725/transformed/classes/classes.dex
Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes.
	at com.android.builder.dexing.D8DexArchiveMerger.getExceptionToRethrow(D8DexArchiveMerger.java:151)
	at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:138)
	at com.android.build.gradle.internal.tasks.DexMergingWorkAction.merge(DexMergingTask.kt:859)
          
I get the same error as @mikalaiulasevich:
Type com.facebook.react.viewmanagers.RNGestureHandlerButtonManagerDelegate is defined multiple times: /Users/inssein/projects/dittoed/app/node_modules/react-native-gesture-handler/android/build/.transforms/d613df52358496bff3ffec7f5dc6fdeb/transformed/debug/com/facebook/react/viewmanagers/RNGestureHandlerButtonManagerDelegate.dex, /Users/inssein/projects/dittoed/app/node_modules/react-native-mmkv/android/build/.transforms/2eb4a9494d7d6ffad6931f884f14eca1/transformed/debug/com/facebook/react/viewmanagers/RNGestureHandlerButtonManagerDelegate.dex
Edit: Don't think its a problem with react native gesture handler. For some reason, when this library builds, it has a lot of viewmanagers compiled that aren't from this library.
          
@mrousavy looks like the issue was with the build.gradle. I'm pretty new to this, but I just happened to look at the build.gradle of other libraries and caught the fact that other libraries were only doing apply plugin: 'com.facebook.react' if

isNewArchitectureEnabled, like so:
if (isNewArchitectureEnabled()) {
    apply plugin: 'com.facebook.react'
I can open a PR if that's correct.
Edit: PR: #499. Feel free to close if not relevant.
          
Very interesting.
Although newArchEnabled=false in android/gradle.properties it was always going into this if. 🤔
apply plugin: 'com.facebook.react' I completely deleted this and it works, amazing. Thanks @inssein 🥳
          
FAILURE: Build failed with an exception.

A problem occurred configuring project ':react-native-mmkv'.
org.gradle.api.InvalidUserDataException: NDK is not installed
[CXX1101] NDK at C:\Users\Your\AppData\Local\Android\Sdk\ndk\23.1.7779620 did not have a source.properties file
build failed as ndk already installed
RN-0.71.1

"react-native-mmkv": "^2.6.1",

newArchEnabled=false in android/gradle.properties
@inssein what are the changes need to do...

cheers-:)resolved
Configure project :react-native-mmkv

[CXX1101] NDK at /Users/chukwuebuka/Library/Android/sdk/ndk/24.0.8215888 did not have a source.properties file

[CXX1101] NDK at /Users/chukwuebuka/Library/Android/sdk/ndk/24.0.8215888 did not have a source.properties file
FAILURE: Build failed with an exception.
What went wrong:

A problem occurred configuring project ':react-native-mmkv'.
NDK is not installed