jstring return in JNI program

Question

This is JNI code.

Java code:

public class Sample1 {
 
    public native String stringMethod(String te         


        

Answer 1

There are several ways but the best I got by converting const char * to c++ string and then to jbyteArray, and its easy to conversion of byteArray to UTF-8 on java side.

C++ side:

const char* string = propertyValue;
std::string str = string;

jbyteArray array = env->NewByteArray(str.length());
env->SetByteArrayRegion(array,0,str.length(),(jbyte*)str.c_str());


return array;

Java/kotlin side:

String((array), Charset.defaultCharset()))