Unity - Scripting API: JNINativeMethod

struct in UnityEngine

Implemented in:UnityEngine.AndroidJNIModule

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This struct stores information about the Java method, such as its name, JNI signature, and the pointer to its corresponding native function. Registering this information using the AndroidJNI.RegisterNatives allows you to integrate Android-specific capabilities in your Unity application.

Note: Use of this struct requires knowledge of Android Java Native Interface (JNI) concepts. For more information, refer to Java Native Interface Specification (Oracle)

// Delegate definition 
delegate void JavaToCs(IntPtr jniEnv, IntPtr klass, int x);// Method definition
[MonoPInvokeCallback(typeof(JavaToCs))]
static void CsMethod(IntPtr jniEnv, IntPtr klass, int x)
{
    Debug.Log("From Java: " + x);
}
// Array to be passed to AndroidJNI.RegisterNative
var methods = new JNINativeMethod[]
{
    new JNINativeMethod
    {
        name = "csMethod",
        signature = "(I)V",
        fnPtr = System.Runtime.InteropServices.Marshal.GetFunctionPointerForDelegate(new JavaToCs(CsMethod)),
    }
};
// Register method with the specified Java class
AndroidJNI.RegisterNatives(clazz, methods);

Properties

Property	Description
fnPtr	The pointer to the native function that is called from the Java code.
name	The name of the Java method implemented by the corresponding native function.
signature	The JNI method signature string that represents the parameters and return type of the Java method.