jna

问题 In my app, I am adding third party hardware connectivity and using their provided code for java. Also using jna.jar to interact with that code as it uses native library to load some .so files. It throws the error: java.lang.UnsatisfiedLinkError: Native library (com/sun/jna/android-arm/libjnidispatch.so) not found in resource path (.) Please help where can I get the jar with android-arm/libjnidispatch.so in it.` I tried adding android-arm.jar which is having libjnidispatch.so separately but

问题 I'm trying to use the Security.h macOS framework via Java and JNA. That means I need to reconstruct certain structs as Java classes. The problem is, when I look at the docs for a struct (this one, for example), all I see is a brief description of the struct without any mention of its fields. Where can I get a full description of a struct in Apple's documentation? 回答1: For a quick look, you can find the headers on Apple's open source site, but it's difficult to navigate, especially as the

问题 Using JNA, my ultimate goal is to read a message that was sent using Windows NET SEND or MSG.EXE, which appears as a Windows pop-up message window on the receiving machine. I am already able to search for this specific message window and get the hWnd handle using the code below. My problem now is how to I iterate through all the elements of this window to find the actual message text, read the message, and also click the OK button? My research tells me I need to use FindWindowEx (to go

问题 OS: Ubuntu 16.04 JNA: 4.2.2 JDK: 1.8.0u111 I'm trying to retrieve the current focused window using JNA in a JavaFX application running on Ubuntu. To achieve my goal, I'm using X11 api, more precisely the function XGetInputFocus in that way : if (Platform.isLinux()) { System.err.println("Linux platform"); final X11 x11 = X11.INSTANCE; final XLib xlib = XLib.INSTANCE; X11.Display display = x11.XOpenDisplay(null); //X11.Window window = new X11.Window(); X11.WindowByReference winRef = new X11

问题 I have a remote machine which has an application installed and has its APIs written in C compiled into a dll. I want to interact with the application using the APIs exposed by loading the dll through JNA in java remotely. i.e., my client code need to load the dll in the target machine and interact with the application. I explored the possibility of using JMI, but it adds more complexity. How to load dll files remotely using JNA/JNI? 回答1: You can specify the location of the dll accordingly. I

问题 I am new to JNA. in my one application I need to return char * aarr= new char[200] to java from c. I cant understand how to do this. What should be the return type of my c++ function? And how should I declare my java method to revive the char array ? Is there any other way like passing variable by reference in c++ to get the char[] value of c++? 回答1: If you are returning a buffer from native code, you need to use Pointer and use the various pointer data access method to get/set data ( Pointer

问题 The data I am expecting in the memory is [8 Bytes (long)][20 Bytes (byte[20])][8 Bytes (long)][20 Bytes (byte[20])][8 Bytes(long)][20 Bytes (byte[20])] And the data structures appear to be correct. The issue is the Data in the structures are wrong. The First byte of data expected is actually the 9th Byte. The First 8 expected bytes do not appear at all (the native long) I suspect the issue lies in the way I'm setting up my Java object but I am not seeing the issue, personally. C Union: union

问题 Using the library in this link http://www.blog.kslemb.com/doku.php/en/projects/globx/java_hid I have been modfied this code to send data on a HID device using interrupt transfer. public byte SetInReport(byte[] buffer, int buffersize) { if (HIDHandle.equals(WinBase.INVALID_HANDLE_VALUE)) { return HID_DEVICE_NOT_OPENED; } IntByReference bWritten = new IntByReference(); boolean Status = Kernel32.INSTANCE.WriteFile(HIDHandle, buffer, buffersize, bWritten, null); if (Status == false) { debug(

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . I am completely new to the JNA interface (? library?) - but I see some of the System-functions are only accessible in Java via JNA. I wanna do some display-stuff, namely rotating and turn-off-monitor. For both function I have to call some system-functions - for the turn-off

问题 I am mapping a C typedef to a JNA Struct. Below if the C typedef: typedef struct _GLYCOUNTERS { unsigned int ulArraySize; LPGLYCOUNTER lpCounters; }GLYCOUNTERS, *LPGLYCOUNTERS; And this is my JNA Structure subclass: public class GlyCounters extends Structure{ public class ByReference extends GlyCounters implements Structure.ByReference {}; public class ByValue extends GlyCounters implements Structure.ByValue {}; public int ulArraySize; public GlyCounter lpCounters; @Override protected List