Android NDK – Static & Shared Library Usage
Android NDK Version
android-ndk-r8b-windows.zip
Build Shared Library
Create file “Android.mk”under $PROJ_DIR/jni folder
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := hello-jni LOCAL_SRC_FILES := hello-jni.c include $(BUILD_SHARED_LIBRARY)
Build Static Library
Android NDK make will not build a static library by default. If you want to build a static library, you should introduce Application.mk (located in the same folder as Android.mk) or create a shared module that use the static library.
Method 1) Introduce the Application.mk
Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := hello-jni LOCAL_SRC_FILES := hello-jni.c include $(BUILD_STATIC_LIBRARY)
APP_MODULES := hello-jniAPP_PLATFORM := android-10 # Specify the android version, very important some times!
Method 2) Let the Static Library be used by Shared Library
Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := hello-jni LOCAL_SRC_FILES := hello-jni.c include $(BUILD_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := test LOCAL_STATIC_LIBRARIES := hello-jni include $(BUILD_SHARED_LIBRARY)
Build Static Library and Shared Library from source code
Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := mylib_static LOCAL_SRC_FILES := src.c include $(BUILD_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := mylib_shared LOCAL_SRC_FILES := src2.c LOCAL_STATIC_LIBRARIES := mylib_static include $(BUILD_SHARED_LIBRARY)
Build Static/Shared Library into Shared/Static Library
Android.mk
LOCAL_PATH := $(call my-dir) # static library introduced here include $(CLEAR_VARS) LOCAL_MODULE := thirdlib1 LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libthird1.a #or $(so_path)/libthird1.so #LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include include $(PREBUILT_STATIC_LIBRARY) #or PREBUILT_SHARED_LIBRARY # second library that use the previous library include $(CLEAR_VARS) LOCAL_MODULE := mylib_use_thirdlib LOCAL_SRC_FILES := src.c LOCAL_STATIC_LIBRARIES := thirdlib1 #or LOCAL_SHARED_LIBRARY include $(BUILD_SHARED_LIBRARY) #If need static one, refer how to build a static library