从C ++调用Android调试方法

Question

I have spent a ridiculous amount of time trying to figure this out and I am at an absolute loss.

I am working with the JUCE library and have modified one of their sample projects. My goal is to have a very simple Android app that is written in C++ and then ported to Android. I need a function in C++ that I can call that will then call a function on the Android side that will return my heap size and other characteristics to my C++ code so that I can manage memory there.

If anyone has a simple solution that would be amazing. Right now my current snag is this:

char const buf[] = "From JNI";

jstring jstr = env->NewStringUTF(buf);

jclass clazz = env->FindClass("android/os/Debug");

But I keep getting an error saying that 'NewStringUTF' is not a _JNIEnv member... but if I right click on the method and jump to the definition, I see it in my jni.h file... any suggestions? I'm working in Xcode by the way...

Answer 1

Is it plain C, not C++? Perhaps your file has a .c extension.

If it's plain C it should be

 JNIEnv* env;

 JNI_CreateJavaVM(&jvm, (void **)&env, &args);

 (*env)->NewStringUTF(env, buf);