Java JNA关注一个特定的Window [英] Java JNA focus a specific Window

问题描述

我的类看起来像这样

  public static class Win32WindowUtils {
 $ b $ public interface User32 extends StdCallLibrary {
 User32 INSTANCE =（User32）Native.loadLibrary user32，User32.class，W32APIOptions.DEFAULT_OPTIONS）; 
 HWND GetParent（HWND hWnd）; 
 HWND FindWindow（String lpClassName，String lpWindowName）; 
 HWND SetFocus（HWND hWnd）; 
 HWND FindWindowEx（HWND hwndParent，HWND hwndChildAfter，String lpszClass，String lpszWindow）; 
 int GetWindowText（HWND hWnd，char [] lpString，int nMaxCount）; 
} 
 
 private static final int WIN_TITLE_MAX_SIZE = 512; 
 
 public static HWND GetWindowHandle（String strSearch，String strClass）{$ b $ char [] lpString = new char [WIN_TITLE_MAX_SIZE]; 
字符串strTitle; 
 int iFind = -1; 
 HWND hWnd = User32.INSTANCE.FindWindow（strClass，null）; 
 while（hWnd！= null）{
 User32.INSTANCE.GetWindowText（hWnd，lpString，WIN_TITLE_MAX_SIZE）; 
 strTitle = new String（lpString）; 
 strTitle = strTitle.toUpperCase（）; 
 iFind = strTitle.indexOf（strSearch）; 
 if（iFind！= -1）{
 return hWnd; 
} 
 hWnd =（User32.INSTANCE）.FindWindowEx（null，hWnd，strClass，null）; 
} 
 return hWnd; 
 
 
 $ / code $ / pre 
 $ b $ p 
我用
  User32.INSTANCE.SetFocus（Win32WindowUtils.GetWindowHandle（windowTitle，null））; 
  
注意： 
 
 
  public String windowTitle =Unbennant  -  Editor; 
  
可悲的是没有发生，我不知道为什么 
 
 
 
 
  import java.awt.AWTException; 
 import java.awt.Robot; 
 import java.awt.event.KeyEvent; 
 
 import com.sun.jna.Native; 
 import com.sun.jna.Pointer; 
 import com.sun.jna.platform.win32.WinDef; 
 import com.sun.jna.platform.win32.WinDef.HWND; 
 import com.sun.jna.platform.win32.WinUser; 
 import com.sun.jna.platform.win32.WinUser.WNDENUMPROC; 
 import com.sun.jna.win32.StdCallLibrary; 
 
 public class TryWithHWND {
 public interface User32 extends StdCallLibrary {
 User32 INSTANCE =（User32）Native.loadLibrary（user32，User32.class）; 
 
 boolean EnumWindows（WinUser.WNDENUMPROC lpEnumFunc，Pointer arg）; 
 
 WinDef.HWND SetFocus（WinDef.HWND hWnd）; 
 
 int GetWindowTextA（HWND hWnd，byte [] lpString，int nMaxCount）; 
 
布尔SetForegroundWindow（WinDef.HWND hWnd）; 
 
 
 public static void main（String [] args）{
 final User32 user32 = User32.INSTANCE; 
 user32.EnumWindows（new WNDENUMPROC（）{
 int count = 0; 
 $ b $ public boolean callback（HWND hWnd，指针arg1）{
 byte [] windowText = new byte [512]; 
 user32.GetWindowTextA（hWnd，windowText，512）; 
 String wText = Native.toString（windowText）; 
 
 //去掉if如果你想要所有的窗口块，不管
 //是否为
 //或不是他们有文本
 if（wText.isEmpty（））{
 return true; 
 } 
 
 System.out.println（Find window with text+ hWnd 
 +，total+ ++ count +Text：+ wText）; 
 if （wText 
 .equals（C：\\ Users \\Avi.J\\Desktop\\Datasource and Mq setup commands.txt  -  Notepad ++））{
 user32.SetForegroundWindow（hWnd）; 
返回false; 
 } 
返回true; 
} 
}，null）; 
 // user32.SetFocus（hWnd）; 
尝试{
 Robot r = new Robot（）; 
 r.keyPress（KeyEvent.VK_ENTER）; 
 r.keyRelease（KeyEvent.VK_ENTER）; 
 r.keyPress（KeyEvent.VK_ENTER）; 
 r.keyRelease（KeyEvent.VK_ENTER）; 
 r.keyPress（KeyEvent.VK_ENTER）; 
 r.keyRelease（KeyEvent.VK_ENTER）; 
 r.keyPress（KeyEvent.VK_ENTER）; 
 r.keyRelease（KeyEvent.VK_ENTER）; 
 catch（AWTException e）{
 // TODO自动生成的catch块
 e.printStackTrace（）; 
 
 
 
 $ / code $ / pre 
 
希望这有助于我相信发送键击的部分也可以通过User32库来完成。
 
I am trying to give my application the power to focus another Window (Notepad in this case)

My Class is looking like this
 public static class Win32WindowUtils {

  public interface User32 extends StdCallLibrary {
        User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class, W32APIOptions.DEFAULT_OPTIONS);
        HWND GetParent(HWND hWnd);
        HWND FindWindow(String lpClassName, String lpWindowName);
        HWND SetFocus(HWND hWnd);
        HWND FindWindowEx(HWND hwndParent, HWND hwndChildAfter, String lpszClass, String lpszWindow);
        int GetWindowText(HWND hWnd, char[] lpString, int nMaxCount);
    }

    private static final int WIN_TITLE_MAX_SIZE = 512;

    public static HWND GetWindowHandle(String strSearch, String strClass) {
        char[] lpString = new char[WIN_TITLE_MAX_SIZE];
        String strTitle;
        int iFind = -1;
        HWND hWnd = User32.INSTANCE.FindWindow(strClass, null);
        while(hWnd != null) {
            User32.INSTANCE.GetWindowText(hWnd, lpString, WIN_TITLE_MAX_SIZE);
            strTitle = new String(lpString);
            strTitle = strTitle.toUpperCase();
            iFind = strTitle.indexOf(strSearch);
            if(iFind != -1) {
                return hWnd;
            }
            hWnd = (User32.INSTANCE).FindWindowEx(null, hWnd, strClass, null);
        }
        return hWnd;
    }
}
And I am calling it by using:
User32.INSTANCE.SetFocus(Win32WindowUtils.GetWindowHandle(windowTitle, null));
Note: 
public String windowTitle = "Unbennant - Editor";
Sadly nothing is happening and I dont know why
解决方案
The below code snippet iterates through all the windows open in the machine , stops when a Notepad++ window with a specific title is found and then brings it into focus.On bringing it to focus it presses the enter key three times.
import java.awt.AWTException;
import java.awt.Robot;
import java.awt.event.KeyEvent;

import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.platform.win32.WinDef;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.platform.win32.WinUser;
import com.sun.jna.platform.win32.WinUser.WNDENUMPROC;
import com.sun.jna.win32.StdCallLibrary;

public class TryWithHWND {
public interface User32 extends StdCallLibrary {
    User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class);

    boolean EnumWindows(WinUser.WNDENUMPROC lpEnumFunc, Pointer arg);

    WinDef.HWND SetFocus(WinDef.HWND hWnd);

    int GetWindowTextA(HWND hWnd, byte[] lpString, int nMaxCount);

    boolean SetForegroundWindow(WinDef.HWND hWnd);
}

public static void main(String[] args) {
    final User32 user32 = User32.INSTANCE;
    user32.EnumWindows(new WNDENUMPROC() {
        int count = 0;

        public boolean callback(HWND hWnd, Pointer arg1) {
            byte[] windowText = new byte[512];
            user32.GetWindowTextA(hWnd, windowText, 512);
            String wText = Native.toString(windowText);

            // get rid of this if block if you want all windows regardless
            // of whether
            // or not they have text
            if (wText.isEmpty()) {
                return true;
            }

            System.out.println("Found window with text " + hWnd
                    + ", total " + ++count + " Text: " + wText);
            if (wText
                    .equals("C:\\Users\\Avi.J\\Desktop\\Datasource and Mq setup commands.txt - Notepad++")) {
                user32.SetForegroundWindow(hWnd);
                return false;
            }
            return true;
        }
    }, null);
    // user32.SetFocus(hWnd);
    try {
        Robot r = new Robot();
        r.keyPress(KeyEvent.VK_ENTER);
        r.keyRelease(KeyEvent.VK_ENTER);
        r.keyPress(KeyEvent.VK_ENTER);
        r.keyRelease(KeyEvent.VK_ENTER);
        r.keyPress(KeyEvent.VK_ENTER);
        r.keyRelease(KeyEvent.VK_ENTER);
        r.keyPress(KeyEvent.VK_ENTER);
        r.keyRelease(KeyEvent.VK_ENTER);
    } catch (AWTException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
}
Hope this helps , I believe the part of sending keystrokes can be done by User32 library as well.

                        
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