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I am using JNI to call my C++ function from Java. One of the C++ function’s arguments is jobject thiz (as far as I know, all JNI native functions have this argument). The function takes quite long to complete and I want to report progress back to the jobject thiz Java object, so that I can show the progress to the user. How can I call jobject’s methods from C++?
You need to look at the JNI functions
GetMethodIDandCall<type>Method*.The details of the various variants and how to call them are documented the JNI specification.