I forked, Ucrop library for cropping, and made some changes. Now i have to build the ndk to make the changes. But am keep getting this error:
Android NDK: jni/Android.mk: Cannot find module with tag 'libpng' in import path
Android NDK: Are you sure your NDK_MODULE_PATH variable is properly defined ?
Android NDK: The following directories were searched:
Android NDK: jni/Android.mk:15: *** Android NDK: Aborting. . Stop.
The project uses Cimg library.
This is my Android.mk file:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := ucrop
LOCAL_SRC_FILES := uCrop.cpp
LOCAL_LDLIBS := -landroid -llog -lz
LOCAL_STATIC_LIBRARIES := libpng libjpeg_static
include $(BUILD_SHARED_LIBRARY)
$(call import-module,libpng)
$(call import-module,libjpeg)
I tried all solutions that given online. But nothing worked. I tried "Adding libpng in android ndk project" and many answers.
Atlast I made it work. It was hard because I was a beginner in NDK. But i will post how i did it in here, since it may help other beginners.
First I download libpng and libjpeg, and saved it under Android/Sdk/ndk-bundle/sources. I saved those under names, libpng and libjpeg respectively.
Then modify Android.mk as below,
LOCAL_PATH := $(call my-dir)
LOCAL_P := /usr/lib/
include $(CLEAR_VARS)
LOCAL_MODULE := ucrop
LOCAL_SRC_FILES := uCrop.cpp
LOCAL_LDLIBS := -landroid -llog -lz
LOCAL_STATIC_LIBRARIES := libpng libjpeg9
include $(BUILD_SHARED_LIBRARY)
$(call import-module,libpng/jni)
$(call import-module,libjpeg/libjpeg9)
Then set environment path NDK_MODULE_PATH as below,
export NDK_BUILD_PATH=/home/jerin/Android/Sdk/ndk-bundle/sources
This is important since, during ndk build, it looks for the libraries in this path.
You can compile ndk-build during gradle build by following [this][1].
Right-click on the module you would like to link to your native library, such as the app module, and select Link C++ Project with Gradle from the menu. Then select ndk-build, and give path to Android.mk