Question

I have tried a simple NDK C++ (quite different syntax from C!) hello world and it works.

Now I want to compile my very large C++ file with the NDK.

Do I need to rename my main()? I have noticed a few post that use android_main(), or should I use the standard package.class.method? And surround them with Excellent! It works like this:

extern "C" {
JNIEXPORT jstring JNICALL
  Java_com_optimuse_app_OptimuseAppActivity_generate(JNIEnv* env, jobject thiz){}

But can I rename my main to something like this? Or should I use android_main. The many posts on the internet are confusing me.

Also, I am not sure what I need to do with all my includes. I have a bunch like <algorithm.h> and my own .h files.

Thank you for helping me with the conventions.

Answer 1

Ok, I got it to work: I ommitted my .h files from the Mk file. And I added this at the bottom of main (renamed to main1) it from java:

extern "C" {

JNIEXPORT jstring JNICALL Java_com_example_optimuse_MainActivity_generate(JNIEnv* env, jobject thiz);
};

JNIEXPORT jstring JNICALL Java_com_example_optimuse_MainActivity_generate(JNIEnv* env, jobject thiz){

    string str = main1();
    return env->NewStringUTF(str.c_str());

}