在Android的NDK项目中添加的libpng [英] Adding libpng in android ndk project

问题描述

我搜索了很多有关的libpng连接到Android NDK项目的主题，但我已经找到正确的答案我的问题，我希望有人能帮助我。

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.

这是我的项目的层次结构：

This is hierarchy of my project:

JNI

different_cpp_files
different_hpp_files
Android.mk
libpng
    different_cpp_files
    different_hpp_files
    Android.mk

在Android.mk的libpng文件夹：

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)

---

我想这一切是正确的在这里..

---

I suppose that everything is right here..

在Android.mk文件夹JNI：

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)

---

最后一行显示，我得到了libpng喜欢native_app_glue LIB（在Android的NDK源目录），现在我想从我的项目的libpng编译。我需要Android.mk改变是什么文件？

---

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?

推荐答案

我已经得到了另一种方式为您提供：

i've got another way for you:

1. 从这里下载的所有文件，并将其粘贴到一个新的文件夹中的任何地方你的系统上：结果
   https://github.com/julienr/libpng-android

进入该文件夹，然后运行：结果
./ build.sh

go into the folder and run:
./build.sh

您将得到一个libpng.a文件中的 [您的文件夹] /obj/local/armeabi/libpng.a 结果
将此文件复制到：结果
[YOUR_ANDROID_NDK_FOLDER] /平台/ [ALL_FOLDERS_IN_HERE] /弓臂/ usr / lib目录/

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/

现在你可以用简单的线条您的所有项目使用的libpng：结果
LOCAL_LDLIBS + = -lpng

now you can use libpng in all your projects with the simple line:
LOCAL_LDLIBS += -lpng

您只需要包括这在你的CPP的：结果
的#include＆LT; png.h＆GT;

you only have to include this in your cpp's:
#include <png.h>

玩得开心！

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