?NDK编译
开始一直还天真的以为在桌面下编好的/usr/local/libhpdf.so可以直接用，后来才意识到要用NDK重新编~.~
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步骤：
项目路径/jni下有两个文件夹：
libharu 和 lpng163 其中包含了 所有对应的src 和 include文件
还有haru 自带的例子 font_demo.cpp
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针对： lpng163
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include $(CLEAR_VARS)sources := png.c \ pngerror.c \ pngget.c \ pngmem.c \ pngpread.c \ pngread.c \ pngrio.c \ pngrtran.c \ pngrutil.c \ pngset.c \ pngtrans.c \ pngtest.c \ pngwio.c \ pngwrite.c \ pngwtran.c \ pngwutil.cLOCAL_C_INCLUDES := $(LOCAL_PATH)/lpng163LOCAL_MODULE := pngLOCAL_LDLIBS := -lzLOCAL_SRC_FILES := $(sources:%=lpng163/%)include $(BUILD_STATIC_LIBRARY)
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针对libharu
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include $(CLEAR_VARS)sources := hpdf_annotation.c \ hpdf_array.c \ hpdf_binary.c \ hpdf_boolean.c \ hpdf_catalog.c \ hpdf_destination.c \ hpdf_dict.c \ hpdf_doc.c \ hpdf_doc_png.c \ hpdf_encoder.c \ hpdf_encoder_cns.c \ hpdf_encoder_cnt.c \ hpdf_encoder_jp.c \ hpdf_encoder_kr.c \ hpdf_encrypt.c \ hpdf_encryptdict.c \ hpdf_error.c \ hpdf_ext_gstate.c \ hpdf_font.c \ hpdf_font_cid.c \ hpdf_fontdef_base14.c \ hpdf_fontdef.c \ hpdf_fontdef_cid.c \ hpdf_fontdef_cns.c \ hpdf_fontdef_cnt.c \ hpdf_fontdef_jp.c \ hpdf_fontdef_kr.c \ hpdf_fontdef_tt.c \ hpdf_fontdef_type1.c \ hpdf_font_tt.c \ hpdf_font_type1.c \ hpdf_gstate.c \ hpdf_image.c \ hpdf_image_png.c \ hpdf_info.c \ hpdf_list.c \ hpdf_mmgr.c \ hpdf_name.c \ hpdf_null.c \ hpdf_number.c \ hpdf_objects.c \ hpdf_outline.c \ hpdf_page_label.c \ hpdf_page_operator.c \ hpdf_pages.c \ hpdf_real.c \ hpdf_streams.c \ hpdf_string.c \ hpdf_u3d.c \ hpdf_utils.c \ hpdf_xref.c LOCAL_C_INCLUDES := \ $(LOCAL_PATH)/libharu/include \ $(LOCAL_PATH)/libharu/src \ $(LOCAL_PATH)/lpng163 LOCAL_LDLIBS := -lz -lmLOCAL_MODULE := haruLOCAL_SRC_FILES := $(sources:%=libharu/src/%)LOCAL_STATIC_LIBRARIES := z pnginclude $(BUILD_SHARED_LIBRARY)
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最后就是font_demo了
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include $(CLEAR_VARS) LOCAL_MODULE := haru_fontLOCAL_SRC_FILES := font_demo.cppLOCAL_C_INCLUDES := $(LOCAL_PATH)/libharu/includeLOCAL_CPPFLAGS += -fexceptionsLOCAL_STATIC_LIBRARIES := z png haruinclude $(BUILD_SHARED_LIBRARY)
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如果只是这样，会报错
error: dereferencing pointer to incomplete type?
需要
1） 缺少 pnglibconf.h ，这个文件在png/scripts/pnglibconf.h.prebuilt ，拷贝出来，改名为pnglibconf.h
2）增加 hpdf_image_png.c 的头文件， 在#include <png.h> 后增加
#include <pngstruct.h>
#include <pnginfo.h>
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即可成功！
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