包括使用NDK pre-编译静态库 [英] Include Pre-compiled Static LIbrary using NDK

问题描述

我期待有一个静态库，pre-编译在我的Andr​​oid NDK工作室项目。我使用的是Android 1.0.1工作室，并尝试在所以这个问题的任何解决方案似乎已经过时（或包括创建库项目，包括它）。

的结构如下：

 应用
/  -  SRC
/ - 主要
/  -  java的
+  -  JNI
+  -  jniLibs
   /  -  armeabi
       /--libpng.a
    --armeabiv7
       /--libpng.a
    ...（每个ABI）
 

我试图包含库的libpng。我尝试创建jniLibs（按照 ph0b （真棒指导，顺便说一句），并加入libpng.a ，到相应的文件夹ABI这仍然给我的错误 - 找不到-llibpng 的，当我尝试编译下面code：

  NDK {
        MODULENAME游戏
        CFLAGS-std = C ++ 11 -fexceptions -DANDROID -I $ {project.buildDir} /../钢骨混凝土/主/ JNI /包括\
                -I $ {project.buildDir} /../钢骨混凝土/主/ JNI /有/ PNG
        LDLIBS东瀛，GLESv3，DL，日志，机器人，的libpng
        STLgnustl_static
}
 

解决方案

你不能只包含.so文件，你还需要有在src的文件夹，实际上提供接口来访问这些方法在那些.so文件。我会建议对连接您的项目库的方式。

最好的办法是将它作为从机器人工作室库模块并丢弃JNI文件夹禁用ndkbuild并通过添加以下到build.gradle文件指向jnilib到/ libs文件夹

  jni.srcDirs = [] //禁用自动NDK建造通话
jniLibs.srcDirs = ['库'] //不需要的.so文件从/库复制到/ jniLibs文件夹
 

（检查库目录也已导入正确用机器人工作室与.so文件）

导入库作为一个模块将自动以下的护理

  

A）的 yourlibrary 的根据摇篮会议库文件夹中的项目文件夹和调整   在settings.gradle）和照片：二）进口项目（包括'的 yourlibrary 的'   C）创建的依赖关系（文件 - >项目结构 - >从左边的子窗口中，选择主要的应用程序模块 - >相关性（最后一个标签） - > preSS绿色的+你的右键 - > yourlibrary 的作为模块依赖关系 - >确定）

I am looking to include a static library that is pre-compiled in my Android Studio NDK project. I am using Android Studio 1.0.1, and any solutions that attempt this problem on SO seem outdated (or involves creating a library project and including it).

The structure is as follows:

app
/--src
/--main
/--java
+--jni
+--jniLibs
   /--armeabi
       /--libpng.a
    --armeabiv7
       /--libpng.a
    ...(for each abi)

I am attempting to include the library libpng. I tried creating jniLibs (as per ph0b (awesome guide, btw) and adding libpng.a to the respective ABI folder. This still gives me the error - cannot find -llibpng when I try to compile with the below code:

ndk {
        moduleName "game" 
        cFlags "-std=c++11 -fexceptions -DANDROID -I${project.buildDir}/../src/main/jni/include \
                -I${project.buildDir}/../src/main/jni/include/png"
        ldLibs "EGL", "GLESv3", "dl", "log", "android", "libpng"
        stl "gnustl_static"
}

解决方案

you cannot just include the .so files, you also need to have the src folders that actually provide the interface to access the methods in those .so files. I would recommend against coupling your project to the library that way.

The best way is to include it as a library module from android studio and discard the jni folders to disable ndkbuild and point the jnilib to the /libs folder by adding following to the build.gradle file

jni.srcDirs = [] //disable automatic ndk-build call
jniLibs.srcDirs = [ 'libs' ] //no need to copy the .so files from /libs to /jniLibs folder

(check that the libs directory has also been imported correctly by android studio with .so files)

importing the library as a module takes care of following automatically

a)yourlibrary library folder in your project folder and restructured according to gradle convention b)imported the project(include ':yourlibrary' in settings.gradle) and
c)created the dependencies ("File -> Project Structure -> Select main app module from the left subwindow -> Dependencies (last tab) -> Press the green "+" on your right -> yourlibrary as Module Dependency -> OK")

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