我想使用JNA在Linux(Ubuntu 14)上检测前台应用程序。我跟着这个链接 Find out what application (window) is in focus in Java ,但我得到了以下错误:未找到JNA库和本机库错误
Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'XLib': Native library (linux-x86-64/libXLib.so) not found in resource path ([file:/home/zzhou/workspace/home_prioritization_plus/bin/, file:/home/zzhou/Downloads/jna-4.1.0.jar, file:/home/zzhou/Downloads/jna-platform-4.1.0.jar])
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:271)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:398)
at com.sun.jna.Library$Handler.<init>(Library.java:147)
at com.sun.jna.Native.loadLibrary(Native.java:412)
at com.sun.jna.Native.loadLibrary(Native.java:391)
at FunctionalityTest$XLib.<clinit>(FunctionalityTest.java:15)
at FunctionalityTest.main(FunctionalityTest.java:23)
的代码是:
import com.sun.jna.Native;
import com.sun.jna.Platform;
import com.sun.jna.Pointer;
import com.sun.jna.platform.unix.X11;
import com.sun.jna.win32.StdCallLibrary;
public class FunctionalityTest {
static class Psapi {
static { Native.register("psapi"); }
public static native int GetModuleBaseNameW(Pointer hProcess, Pointer hmodule, char[] lpBaseName, int size);
}
public interface XLib extends StdCallLibrary {
XLib INSTANCE = (XLib) Native.loadLibrary("XLib", Psapi.class); // <-- PROBLEM
int XGetInputFocus(X11.Display display, X11.Window focus_return, Pointer revert_to_return);
}
public static void main(String args[]) {
if(Platform.isLinux()) { // Possibly most of the Unix systems will work here too, e.g. FreeBSD
final X11 x11 = X11.INSTANCE;
final XLib xlib= XLib.INSTANCE;
X11.Display display = x11.XOpenDisplay(null);
X11.Window window=new X11.Window();
xlib.XGetInputFocus(display, window,Pointer.NULL);
X11.XTextProperty name=new X11.XTextProperty();
x11.XGetWMName(display, window, name);
System.out.println(name.toString());
}
}
}
要导入JNA库,我下载JNA和JNA平台从https://github.com/twall/jna和使用配置构建路径...在Eclipse中添加库。我没有安装任何东西。这可能是问题的根源吗?
感谢您的帮助。
是XLIB你的图书馆吗?或者你的代码期望它在系统上可用(然后可能需要安装它)。大多数Linux发行版的大多数库都位于'/ lib'或'/ usr/lib'中。 (com.sun.jna.win32。*也适用于Windows操作系统)。 – SnakeDoc 2014-09-22 16:29:26
[从类路径加载本机库]的可能重复(http://stackoverflow.com/questions/23189776/load-native-library-from-class-path)。 – jww 2014-09-22 17:02:45