Android VM Settup (Qt inpired)

native-lib.cpp

static JavaVM * m_android_vm = nullptr;

extern "C"
jint JNICALL JNI_OnLoad(JavaVM *vm, void *) {
    __android_log_print(ANDROID_LOG_DEBUG, "TestBluetooth", "JNI LOAD");

    static bool initialised = false;
    if (initialised) {
        return initialised;
    }
    initialised = true;

    m_android_vm = nullptr;
    typedef union {
        JNIEnv *nativeEnvironment;
        void *venv;
    } UnionJNIEnvToVoid;
    UnionJNIEnvToVoid venv;
    JNIEnv *nativeEnvironment = nullptr;

    if(vm->GetEnv(&venv.venv, JNI_VERSION_1_4) != JNI_OK){
        __android_log_print(ANDROID_LOG_FATAL, "TestBluetooth", "GetEnv failed");
        return -1;
    }
    return JNI_VERSION_1_6;
}