UnsatisfiedLinkError in companion object Kotlin JNI

Question

I\'m converting code from Java to Kotlin in one of my mobile apps, and the code that worked in Java stopped working in Kotlin. It uses JNI bridge to call C++ code.

Kotli

Answer 1

If you want to avoid changing the C++ code you should annotate the Kotlin function with @JvmStatic, i.e:

@JvmStatic external fun convertNative(width: Int, height: Int, row: Int, input: ByteArray, ft: Int, output: ByteArray)

By the way, your C++ function declaration is technically incorrect: For static methods, the second parameter is a jclass, not a jobject.