How to use .so and .h files in Android?

Question

I am using C++ to code in Android (I am using cocos2d-x, specifically).

Now, say, I have a class, MyClass, with .h and .cpp files. I would like to create a .so out of these files. Then, I would like to include that .so in my project and access it via #include "MyClass.h". Is it possible? If so, how? Thanks!

see here: http://stackoverflow.com/questions/10711047/the-completest-cocos2d-x-tutorial-guide-list — Aaron He, Feb 08 '13 at 18:40

score 1 · Answer 1 · answered Feb 08 '13 at 19:02

To build your static library for ARM you can use the NDK standalone toolchain.

Once you've compiled your .so, you can include the library in your project using the Android NDK make file (Android.mk) which will look like the following:

LOCAL_PATH := $(call my-dir)  
LOCAL_SRC_FILES := my_module.so  
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

You'll want to make sure you include the headers (/include) in the right path.

Not sure if your intent is to ge back into Android-land with your code, but if you're looking to create a bridge between your .so/C/C++ code and Java, you'll need to describe the appropriate JNI methods in C, build out the necessary Java classes with the static System.loadLibrary('my_module') imports and native method declarations mapped to your JNI methods.

Hi! Thank you for your reply. Using the NDK standalone toolchain is very complicated. Is there a way to build the static library using the ndk-build? If so, how? — jmschuaquico, Feb 09 '13 at 04:27
And btw, I am not going to code java to access the .so, just C++. — jmschuaquico, Feb 09 '13 at 04:32

How to use .so and .h files in Android?

1 Answers1