https://github.com/bennyhuo/hello-kni

Demo for Jni call Kotlin-Native lib.
https://github.com/bennyhuo/hello-kni

android jni-android kotlin kotlin-native

Last synced: about 1 year ago
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Demo for Jni call Kotlin-Native lib.

• Host: GitHub
• URL: https://github.com/bennyhuo/hello-kni
• Owner: bennyhuo
• License: apache-2.0
• Created: 2018-01-28T23:10:25.000Z (over 8 years ago)
• Default Branch: mpp-gradle
• Last Pushed: 2022-12-07T18:06:42.000Z (over 3 years ago)
• Last Synced: 2025-04-14T22:54:12.792Z (about 1 year ago)
• Topics: android, jni-android, kotlin, kotlin-native
• Language: Kotlin
• Homepage:
• Size: 197 KB
• Stars: 96
• Watchers: 5
• Forks: 19
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
Hello KNI

=========

This is a Demo of Jni calling Kotlin Native originated from Google's jni demo.

### Contents

Kotlin Native can interop with C directly. In order to call Kotlin Native functions from Java, we should use `CName` to annotated the functions with a proper name:

```kotlin

@CName("Java_com_example_hellojni_HelloJni_stringFromJNI")

fun stringFromJNI(env: CPointer, thiz: jobject): jstring {

    memScoped {

        return env.pointed.pointed!!.NewStringUTF!!.invoke(env, "This is from Kotlin Native!!".cstr.ptr)!!

    }

}

```

What's in the demo：

* Uses of Android Log

* Return a Java String

* Call Java methods from Kotlin Native

### How to Build

Simply Build and run your app. Dependencies are carefully managed by gradle.

### Preview

Screen shot:

![](images/screen-shot.png)

Logcat :

![](images/log.png)