我想使用JNA在Linux(Ubuntu 14)上檢測前臺應用程序。我跟着這個鏈接 Find out what application (window) is in focus in Java ,但我得到了以下錯誤:未找到JNA庫和本機庫錯誤
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)
的代碼是:
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());
}
}
}
要導入JNA庫,我下載JNA和JNA平臺從https://github.com/twall/jna和使用配置構建路徑...在Eclipse中添加庫。我沒有安裝任何東西。這可能是問題的根源嗎?
感謝您的幫助。
是XLIB你的圖書館嗎?或者你的代碼期望它在系統上可用(然後可能需要安裝它)。大多數Linux發行版的大多數庫都位於'/ lib'或'/ usr/lib'中。 (com.sun.jna.win32。*也適用於Windows操作系統)。 – SnakeDoc 2014-09-22 16:29:26
[從類路徑加載本機庫]的可能重複(http://stackoverflow.com/questions/23189776/load-native-library-from-class-path)。 – jww 2014-09-22 17:02:45