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java - 如何使用 JNA 获取 Activity 窗口的应用程序名称?

转载 作者:行者123 更新时间:2023-11-30 02:08:48 34 4
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我有以下使用 JNA 库的代码,它输出 Activity 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);

}

但是如何获取应用程序的名称,例如 Chrome 的“chrome.exe”?

提前致谢

最佳答案

我发现 GetWindowModuleFilename 在大多数情况下都不起作用。然而,QueryFullProcessImageName 工作得很好。请注意,您仍然需要 OpenProcess 进程来访问图像文件名。

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 Activity 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;
}
}

在我的窗口周围单击,程序会打印出如下行:

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

关于java - 如何使用 JNA 获取 Activity 窗口的应用程序名称?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50694754/

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