App build has warning issues "Unable to strip the following libraries"

Description

When I build the simple app only shows “Hello world”, I’ve got the following warning, and the size of my app reaches 32MB. I used the build command ./gradlew assembleRelease and also used Android Studio. I got the same warning in both cases. Android Studio has installed the NDK(side by side) to strip these packages. How can I fix this issue?

> Task :app:stripDebugDebugSymbols
Unable to strip the following libraries, packaging them as 
they are: libbetter.so, libc++_shared.so, libevent-2.1.so,

Version

0.66.4

Output of npx react-native info

info Fetching system and libraries information… System: OS: Windows 10 10.0.18362 CPU: (8) x64 Intel® Core™ i5-10210U CPU @ 1.60GHz Memory: 1.97 GB / 11.85 GB Binaries: Node: 14.17.4 - C:\Program Files\nodejs\node.EXE
Yarn: 1.22.5 - C:\Program Files (x86)\Yarn\bin\yarn.CMD npm: 6.14.14 - C:\Program Files\nodejs\npm.CMD Watchman: Not Found SDKs: Android SDK: Not Found Windows SDK: Not Found IDEs: Android Studio: Version 4.2.0.0 AI-202.7660.26.42.7351085 Visual Studio: Not Found Languages: Java: Not Found npmPackages: @react-native-community/cli: Not Found react: 17.0.2 => 17.0.2 react-native: 0.66.4 => 0.66.4 react-native-windows: Not Found npmGlobalPackages: react-native: Not Found

Steps to reproduce

I created the app with this command. npx react-native init sample I installed react-native-geolocation-service. I build the app with ./gradlew assembleRelease But I’ve got a warning.

Snack, code example, screenshot, or link to a repository

No response

[thejadasari]

If you are using Gradle build tools version 4 or higher, adding android:extractNativeLibs=“true” to application as per android documentation, may solve the issue.

https://developer.android.com/studio/releases/gradle-plugin#extractNativeLibs

[clytras]

The NDK version set by ndkVersion inside android/build.gradle must be installed using Android Studio SDK Tools.

1. Check the ndkVersion inside android/build.gradle

buildscript {
    ext {
        buildToolsVersion = "31.0.0"
        minSdkVersion = 21
        compileSdkVersion = 31
        targetSdkVersion = 31

        if (System.properties['os.arch'] == "aarch64") {
            // For M1 Users we need to use the NDK 24 which added support for aarch64
            ndkVersion = "24.0.8215888"
        } else {
            // Otherwise we default to the side-by-side NDK version from AGP.
            ndkVersion = "21.4.7075529"
        }
    }
}

1. Open Android Studio 🡪 Settings 🡪 Android SDK 🡪 SDK Tools, check the “Show Package Details” at bottom right and then under NDK (Side by side) check the exact version to match the one inside android/build.gradle and then hit the Apply button.

Wait to finish installing and then clean the app with something like cd android && ./gradlew clean && cd .. and then rebuild it.

This fixed this issue for me and there are no “Unable to strip the following libraries” errors any more after clean builds.