如何使用JNA获取活动窗口的应用程序名称？
如何使用JNA获取活动窗口的应用程序名称？
提问于 2018-06-05 15:44:10
下面的代码使用JNA库输出活动窗口的标题。
private static final int MAX_TITLE_LENGTH = 1024;
public static void main(String[] args) throws Exception {
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
LocalDateTime now = LocalDateTime.now();
TimerTask task = new TimerTask() {
@Override
public void run() {
char[] buffer = new char[MAX_TITLE_LENGTH * 2];
HWND hwnd = User32.INSTANCE.GetForegroundWindow();
User32.INSTANCE.GetWindowText(hwnd, buffer, MAX_TITLE_LENGTH);
System.out.println("Active window title: " + Native.toString(buffer));
try {
BufferedWriter bw = new BufferedWriter(
new FileWriter(
new File("C:\\Users\\" + System.getProperty("user.name") + "\\AppData\\Roaming\\system\\useracivity.txt"),
true
)
);
bw.write(Native.toString(buffer) + " TIME WAS " + dtf.format(now));
bw.newLine();
bw.close();
} catch (Exception e) {
}
}
};
Timer timer = new Timer();
timer.schedule(task, new Date(), 5000);
}但是，我如何获取应用程序的名称，例如Chrome "chrome.exe"？
提前感谢
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-06-17 01:57:55
我发现GetWindowModuleFilename在大多数情况下并不能正常工作。然而，QueryFullProcessImageName运行得很好。请注意，您仍然需要对进程执行OpenProcess操作才能访问图像文件名。
在控制台应用程序中尝试此操作。当您更改窗口时，它将打印出活动窗口的图像文件名。
import com.sun.jna.platform.win32.*;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.platform.win32.WinNT.HANDLE;
import com.sun.jna.ptr.IntByReference;
public class Main {
public static void main(String[] args) throws Exception {
HWND prevFg = null;
while (true) {
Thread.sleep(200);
HWND fg = User32.INSTANCE.GetForegroundWindow();
// don't print the name if it's still the same window as previously
if (fg.equals(prevFg)) {
continue;
}
String fgImageName = getImageName(fg);
if (fgImageName == null) {
System.out.println("Failed to get the image name!");
} else {
System.out.println(fgImageName);
}
prevFg = fg;
}
}
private static String getImageName(HWND window) {
// Get the process ID of the window
IntByReference procId = new IntByReference();
User32.INSTANCE.GetWindowThreadProcessId(window, procId);
// Open the process to get permissions to the image name
HANDLE procHandle = Kernel32.INSTANCE.OpenProcess(
Kernel32.PROCESS_QUERY_LIMITED_INFORMATION,
false,
procId.getValue()
);
// Get the image name
char[] buffer = new char[4096];
IntByReference bufferSize = new IntByReference(buffer.length);
boolean success = Kernel32.INSTANCE.QueryFullProcessImageName(procHandle, 0, buffer, bufferSize);
// Clean up: close the opened process
Kernel32.INSTANCE.CloseHandle(procHandle);
return success ? new String(buffer, 0, bufferSize.getValue()) : null;
}
}单击我的窗口，程序会打印出如下所示的行：
C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.3.5\bin\idea64.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.3.5\bin\idea64.exe页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50694754
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