Question

In android ndk when i use the header files that is generated by helper tool javah it works fine. but when i create a normal file with .h extension and include jni.h and any other required header files i am not able use the type or keyword or any functions from the included header files and it always shows me the “Type ‘whatever‘ couldn’t be resolved” while this same thing i can do in the machine generated header files with javah tools without any cause.

Though i’ve included arm platforms library in C/C++ General -> Paths and Symbols ->Include. it keeps showing me this error.

Consider the following piece of code.

#include "store.h"
#include <jni.h>
#include <stdint.h>
#include <pthread.h>

#ifndef _STOREWATCHER_H_
#define _STOREWATCHER_H_

#define SLEEP_DURATION 5
#define STATE_OK 0
#define STATE_KO 1
#ifdef __cplusplus
   extern "C" {
#endif
    typedef struct{
        Store* mStore;
        JavaVM* mJavaVM;
        jobject mStoreFront;
        pthread_t mThread;
        int32_t mState;
    }StoreWatcher;
#ifdef __cplusplus
} 
#endif
#endif

it shows me in this code that Store, JavaVM, jobject, pthread_t couldn’t be resolved. Please help me.

any kind of help will be appreciated.

Answer 1

In C, unlike Java, you have files with names like storewatcher.c and files with names like storewatcher.h. The .h files are not compiled on themselves, you must use #include directive in one or more .c files for the .h file to be recognized by the compiler, e.g.

#include "storewatcher.h"