Android Native Plugin - DllNotFoundException

Unity Engine
1

I was trying to build c++ native plugin for unity android and facing dll not found issue and then I tried the sample native plugin package unity providing in this link Unity - Manual: Call native plug-in for Android code and I found the error when running
Exception: DllNotFoundException: Unable to load DLL ‘native’. Tried the load the following dynamic libraries: Unable to load dynamic library ‘native’ because of 'Failed to open the requested dynamic library (0x06000000) dlerror() = dlopen failed: library “native” not found
CallNativeCode.add (System.Single x, System.Single y) (at <00000000000000000000000000000000>:0)
CallNativeCode.Start () (at <00000000000000000000000000000000>:0)
The packages I built also was giving same errors.
How to solve this problem?

2

Could you show the code for your C# script, C++ code and how you’ve setup the plugins?

3

I have imported the sample asset from this link Unity - Manual: Call native plug-in for Android code and build the scene for android. Before building I have set the script compiling mode to L2CPP and enabled for armv8 in player settings.

4

Yikes, that sample project is very out of date. It only contains armv7 native library, so to run it on armv8 you need to recompile the library yourself for that architecture.

1 Like
5

Thanks. Yes it’s working in armv7

6

Hey @mmar58 , thank you for reporting this issue.

The docs have now been updated, AndroidNativePlugin.unitypackage now includes native libraries for all the architectures Unity supports (armv7, arm64, x86 and x86_64).

7

Unity editor version is 2021.3.45f1, unity jar EDM4U is last version, I have a project file is mobile app. In my project tools is Firebase Auth, Remote Config and Messaging. My Google Sign In package stopped working after this jar update and I get this error:

2024/11/20 18:39:52.983 9891 9944 Error Unity DllNotFoundException: Cannot load DLL ‘native-googlesignin’. I tried loading the following dynamic libraries: 'Unable to load dynamic library ‘native-googlesignin’ due to ‘Failed to open requested dynamic library (0x06000000) dlerror() = dlopen failed: library “native-googlesignin” not found’

What should I do?

I’m in project file ise EDM4U last uptade. Thank you…

8

I was searching the solution about a week. That is the answer . Just remove the arm8(arm64) and check arm7. Thank you so much! :slight_smile:

9

I’m facing this issue after importing Firestore and clicking External Dependency Manager → Android Resolver → Force Resolve

The settingsTemplate.gradle file gets updated incorrectly. Initially, it contains:

maven {
    url (unityProjectPath + "/Assets/GeneratedLocalRepo/GoogleSignIn/Editor/m2repository") 
}

After resolving dependencies, it changes to the wrong path:

maven {
    url (unityProjectPath + "/Assets/GoogleSignIn/Editor/m2repository")
}

This incorrect path causes the “Unable to load DLL ‘native-googlesignin’” error.

Solution

Manually update the path back to the correct one:

maven {
    url (unityProjectPath + "/Assets/GeneratedLocalRepo/GoogleSignIn/Editor/m2repository") 
}

This resolves GoogleSignIn issues and fixes the “Unable to load DLL ‘native-googlesignin’” error.

1 Like