Adding libpng in android ndk project - android-ndk

Question

I've searched a lot of topics about linking libpng to my android ndk project but I've found right answer for my problem and I hope somebody will help me.
This is hierarchy of my project:
jni
different_cpp_files
different_hpp_files
Android.mk
libpng
different_cpp_files
different_hpp_files
Android.mk
Android.mk in libpng folder:
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LS_C=$(subst $(1)/,,$(wildcard $(1)/*.c))
LOCAL_MODULE := png
LOCAL_SRC_FILES := \
$(filter-out example.c pngtest.c,$(call LS_C,$(LOCAL_PATH)))
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
LOCAL_EXPORT_LDLIBS := -lz
include $(BUILD_STATIC_LIBRARY)
I suppose that everything is right here..
Android.mk in jni folder:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LS_CPP=$(subst $(1)/,,$(wildcard $(1)/*.cpp))
LOCAL_MODULE := pacman
LOCAL_CFLAGS := -Wno-psabi
LOCAL_SRC_FILES := $(call LS_CPP,$(LOCAL_PATH))
LOCAL_LDLIBS := -landroid -llog -lEGL -lGLESv1_CM -lOpenSLES
LOCAL_STATIC_LIBRARIES := android_native_app_glue png
include $(BUILD_SHARED_LIBRARY)
$(call import-module,android/native_app_glue)
$(call import-module,libpng)
The last line shows that I got libpng like native_app_glue lib(in the directory of android-ndk sources) Now I want to compile libpng from my project. What I need to change in Android.mk file?

Answer 1

i've got another way for you:
Download all files from here and paste it into a new folder anywhere on your system:
https://github.com/julienr/libpng-android
go into the folder and run:
./build.sh
You will get an libpng.a file in [YOUR_FOLDER]/obj/local/armeabi/libpng.a
Copy this file into:
[YOUR_ANDROID_NDK_FOLDER]/platforms/[ALL_FOLDERS_IN_HERE]/arch-arm/usr/lib/
now you can use libpng in all your projects with the simple line:
LOCAL_LDLIBS += -lpng
you only have to include this in your cpp's:
#include <png.h>
Have fun!