Android基于JNA集成调用第三方C/C++的so库

拼搏现实的明天。 2023-09-26 23:26 18阅读 0赞

（1）引入JNA。

基于JNA开源项目，JNA对Android NDK的封装，简化Android层JNI集成调用C/C++的so库。

[GitHub - java-native-access/jna: Java Native AccessJava Native Access. Contribute to java-native-access/jna development by creating an account on GitHub.![fluidicon.png][]https://github.com/java-native-access/jna][GitHub - java-native-access_jna_ Java Native AccessJava Native Access. Contribute to java-native-access_jna development by creating an account on GitHub._fluidicon.png_https_github.com_java-native-access_jna]

在Android的app的build.gradle添加引用：

implementation group: 'net.java.dev.jna', name: 'jna', version: '5.13.0'

这里可以直接添加JNA最新版本：

[https://mvnrepository.com/artifact/net.java.dev.jna/jna![icon-default.png_t_N3I4][]https://mvnrepository.com/artifact/net.java.dev.jna/jna][https_mvnrepository.com_artifact_net.java.dev.jna_jna_icon-default.png_t_N3I4_https_mvnrepository.com_artifact_net.java.dev.jna_jna]

在app的build.gradle的android块内设置jniLibs.srcDir:

sourceSets {
            main {
                jniLibs.srcDir 'libs'
            }
        }

（2）在 [jna/dist at master · java-native-access/jna · GitHub][jna_dist at master _ java-native-access_jna _ GitHub] 这里下载 android-aarch64.jar

![ff37f2db106943879980918a2e457eed.png][]

因为我这里基于arm64-v8a架构。如果是armv7,选择相应的jar包。

下载后，解压android-aarch64.jar，里面是libjnidispatch.so文件，把这个文件放入app\\libs\\arm64-v8a下面

![4af050ba19654615969be7d1abb100fd.png][]

（3）以上准备工作完成后，开始集成第三方so库。

把第三方so库放入app\\libs\\arm64-v8a下

![d180d1fe0a3941549256ca29b94c788f.png][]

（4）开始调用第三方so库中的C/C++函数。写上层Java代码。

![b4a5f3824d114dd99add7f8bf63a07dc.png][]

注意Native.load()里面对应的so库名，so库名一般以libxxx.so开头，但是在Native.load里面，不要带上lib和结尾的.so后缀名，即去掉开头lib和结尾的.so。

在CLibrary里面定义的接口函数，即为libxxx.so第三方库里面完成的函数。

（5）在Android层直接使用：

![42444c9ae00844f69ec0800d5efecfa2.png][]

[Android基于JNA加载第三方.so库报错：java.lang.UnsatisfiedLinkError Native library (com/sun/jna/android-aarch64/l\_zhangphil的博客-CSDN博客基于Windows平台，Android NDK（JNI）开发技术》【摘要】本文介绍如何基于Windows平台，在Eclipse中使用Android NDK技术实现“Android平台上的JNI ( Java Native Interface ) ”开发。新增的getStringCpp()是新增的一个方法，因为没有实现所以报红。解压后，里面是一个libjnidispatch.so，把libjnidispatch.so放到Android项目的libs\\arm64-v8a\\里面即可。![favicon32.ico][]https://blog.csdn.net/zhangphil/article/details/130400296][Android_JNA_.so_java.lang.UnsatisfiedLinkError Native library _com_sun_jna_android-aarch64_l_zhangphil_-CSDN_Windows_Android NDK_JNI_Windows_Eclipse_Android NDK_Android_JNI _ Java Native Interface _ _getStringCpp_libjnidispatch.so_libjnidispatch.so_Android_libs_arm64-v8a_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_130400296]

[fluidicon.png]: https://github.com/fluidicon.png
[GitHub - java-native-access_jna_ Java Native AccessJava Native Access. Contribute to java-native-access_jna development by creating an account on GitHub._fluidicon.png_https_github.com_java-native-access_jna]: https://github.com/java-native-access/jna
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[https_mvnrepository.com_artifact_net.java.dev.jna_jna_icon-default.png_t_N3I4_https_mvnrepository.com_artifact_net.java.dev.jna_jna]: https://mvnrepository.com/artifact/net.java.dev.jna/jna
[jna_dist at master _ java-native-access_jna _ GitHub]: https://github.com/java-native-access/jna/tree/master/dist
[ff37f2db106943879980918a2e457eed.png]: https://img-blog.csdnimg.cn/ff37f2db106943879980918a2e457eed.png
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[Android_JNA_.so_java.lang.UnsatisfiedLinkError Native library _com_sun_jna_android-aarch64_l_zhangphil_-CSDN_Windows_Android NDK_JNI_Windows_Eclipse_Android NDK_Android_JNI _ Java Native Interface _ _getStringCpp_libjnidispatch.so_libjnidispatch.so_Android_libs_arm64-v8a_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_130400296]: https://blog.csdn.net/zhangphil/article/details/130400296