下载zlib-1.2.8.tar.xz和libpng-1.6.13.tar.xz，解压tar -xJvf xx.tar.xz

编译zlib

编写zlibbuild.mk文件，对照源码下的win32/Makefile.gcc文件填写LOCAL_SRC_FILES项：

LOCAL_PATH:= $(call my-dir)  

include $(CLEAR_VARS)  

LOCAL_SRC_FILES := \
    adler32.c \
    compress.c \
    crc32.c \
    deflate.c \
    gzclose.c \
    gzlib.c \
    gzread.c \
    gzwrite.c \
    infback.c \
    inffast.c \
    inflate.c \
    inftrees.c \
    trees.c \
    uncompr.c \
    zutil.c  

LOCAL_MODULE:= libz  

include $(BUILD_STATIC_LIBRARY)

编写build文件

ndk-build \
NDK_PROJECT_PATH=`pwd` \
APP_ABI=armeabi-v7a \
APP_PLATFORM=android-14 \
APP_BUILD_SCRIPT=`pwd`/zlibbuild.mk \
TARGET_PRODUCT=alltarget \
$@

执行. build编译

编译libpng

参照源码下的scripts/makefile.gcc文件填写LOCAL_SRC_FILES项：

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

LOCAL_SRC_FILES := \
    png.c \
    pngerror.c \
    pngget.c \
    pngmem.c \
    pngpread.c \
    pngread.c \
    pngrio.c \
    pngrtran.c \
    pngrutil.c \
    pngset.c \
    pngtrans.c \
    pngwio.c \
    pngwrite.c \
    pngwtran.c \
    pngwutil.c

LOCAL_MODULE := libpng

LOCAL_LDLIBS := -lz

include $(BUILD_SHARED_LIBRARY)

编译时提示缺少pnglibconf.h文件，解决办法使用源码下的scripts/pnglibconf.h.prebuilt文件，ln -s scripts/pnglibconf.h.prebuilt pnglibconf.h