Not able to compile external precompiled shared library with Android-NDK

Question

I have two shared library: A.so and B.so and want to link them with my Android Project .

1. Create a new Android Project from Eclipse
2. Right click on project-> Android Tools-> Add Native support
3. It created a new folder: JNI , JNI/projectname.cpp and JNI/Android.mk
4. Now i add A.so and B.so to <Project-folder>/libs/armeabi

When i build the project i got this output in console:

**** Build of configuration Default for project fona ****

/home/users/android-ndk/ndk-build all 
Android NDK: WARNING: APP_PLATFORM android-19 is larger than android:minSdkVersion 8 in ./AndroidManifest.xml    
[armeabi] Install        : projectname.so => libs/armeabi/libprojectname.so

 *** Build Finished ****

My concern is that it didn't build A.so and B.so with Project.so . May be i am something missing in Android.mk file

Content of Android.mk file:

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE    := projectname
LOCAL_SRC_FILES := projectname.cpp
include $(BUILD_SHARED_LIBRARY)

Answer 1

You can't just place prebuilt libraries. You need to define it as separate modules, too. Move your A.so and B.so to jni folder, and modify your Android.mk like this:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE    := A
LOCAL_SRC_FILES := A.so
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE    := B
LOCAL_SRC_FILES := B.so
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE    := projectname
LOCAL_SRC_FILES := projectname.cpp
include $(BUILD_SHARED_LIBRARY)