jna

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am new in Java, searched for this question in google and stackoverflow, found some posts, but still I can't understand. I want to use DLL libary (C++) methods from Java. I use JNA for this purpose. JNA found my library but it can't find my method: Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking up function 'LoadCurrentData': The specified procedure could not be found. My code: package javaapplication1; import com.sun.jna.Library; import com.sun.jna.Native; import com.sun.jna.Platform; import com.sun.jna.Pointer;

1.JNA模拟结构体 原生函数定义： struct{ ipaddress struAddress;//结构体中包含结构体 device_register_cb fnCB;//回调函数 void *pUser; BYTE byRes[32]; }CmsListenParam, *CmsListenParam; struct{ char szIP[128]; WORD wPort; BYTE byRes[2]; }ipaddress, *ipaddress; java使用下面的方式模拟结构体： public static class CmsListenParam extends Structure{ public IpAddress struAddress; public DeviceRegisterCB fnCB; public Pointer pUser; public byte[] byRes=new byte[32]; } public static class IpAddress extends Structure{ public byte[] szIP=new byte[128]; public short wPort; public byte[] byRes=new byte[2]; } JNA中，定义一个类型继承Structure 类，用这个类来模拟C 语言的结构体

I'm having problems using the DWM functionality of Windows Vista/7 on Java windows. I want to make the background of my frame use the Aero style. The Windows API to do so is provide by the function DwmExtendFrameIntoClientArea in the dwmapi library. I've managed to call the procedure properly via JNA, and it does what it is supposed to do (You can see that for example when resizing the frame, before the next repaint you see the proper aero effects in the area not yet painted, see the attached image). But somewhere (I can't figure out where) a background is painted over the Aero effect and the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have started to build a java service which incorporates JNA to load a native C/C++ lib and i want to run the java service on the Raspberry PI aka arm platform. I have successfully built a stable ground of the service and it runs on both Windows7 and linux-amd64/debian but.. on the RPI platform i get the above stated error: Exception in thread "main" java.lang.UnsatisfiedLinkError: JNA native support (/com/sun/jna/linux-arm/libjnidispatch.so) not found in resource path On the RPI i have done the following: * Installed both openjdk7 and

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm using the following code to load a dll in JNA (irrelevant code is left out): public class JNAMain { public interface PointShapeBuffer extends Library { ... } public static void main(String[] args){ System.setProperty("jna.library.path", "c:\\jnadll"); System.setProperty("java.library.path", "c:\\jnadll"); PointShapeBuffer jna = (PointShapeBuffer) Native.loadLibrary("FileGDBAPI", PointShapeBuffer.class); } } And I get the following error: Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'FileGDBAPI': The

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I try to import jna.jar into my project since JNA is a very useful tool to call Native library which is base on JNI. OS: Windows 10 IDE: Android Studio 1.5.1 JDK: 1.8.0_73 NDK: r10e What I have done (AS = Android Studio) Create a new project by AS with API18. download jna.jar from their GitHub. https://github.com/java-native-access/jna copy jna.jar into project folder. JNATest\app\libs\jna.jar In AS, right-click on the icon of jna.jar, choose Add as Library Wait for few seconds, check the File->Project Structure->app->Dependencies. We do

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Using JNA 4.0.0, on Linux, I am trying to load a native library ( libmean.so ), which is in the lib subdirectory (the library is just a trivial example that calculates the mean of two numbers). I run the following code (within Eclipse), with -Djna.library.path=lib set in the run configuration. import com.sun.jna.Library; import com.sun.jna.Native; public class Mean { public interface MeanLib extends Library { MeanLib INSTANCE = (MeanLib) Native.loadLibrary("mean", MeanLib.class); double mean(double a, double b); } public static void main

这两天了解了一下java调用dll动态库的方法，总的有三种：JNI、JNA、JNative。其中JNA调用DLL是最方便的。 ・ JNI ・ JNA ・ JNative 使用JNative调用DLL除了要引入jar包外还需要额外引入一个dll文件，而JNA只需要引入jar即可使用。 使用JNA框架调用DLL动态库，步骤如下 ： 1.导入JNA支持的jar包 添加 jna-4.x.x.jar、jna-platform-4.x.x.jar到项目buildpath中（ Maven项目可在中央仓库中搜索JNA的相关依赖添加到项目中） 2.代码调用DLL动态库方法 import com.sun.jna.Library; import com.sun.jna.Native; import com.sun.jna.Platform; import com.sun.jna.win32.StdCallLibrary; /** * JNA框架DLL动态库读取调用示例类 * @ClassName: DllCall * @Description: 读取调用DLL动态库文件中的方法 * @author : LinWenLi * @date: 2018年7月18日 上午10:32:16 */ public class JNADllCall { /** * DLL动态库调用方法 * @Description: