我想创建一个Java应用程序来更改Windows XP/7上笔记本电脑的屏幕亮度。请帮忙

最佳答案

正如其他人所说,没有任何官方API可以使用。但是,使用Windows Powershell(我相信Windows附带了Windows Powershell,因此无需下载任何内容)和WmiSetBrightness,可以创建一种简单的解决方法,该方法应适用于所有装有Visa或更高版本的Windows PC。

您需要做的就是将此类复制到您的工作空间中:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


public class BrightnessManager {
    public static void setBrightness(int brightness)
            throws IOException {
        //Creates a powerShell command that will set the brightness to the requested value (0-100), after the requested delay (in milliseconds) has passed.
        String s = String.format("$brightness = %d;", brightness)
                + "$delay = 0;"
                + "$myMonitor = Get-WmiObject -Namespace root\\wmi -Class WmiMonitorBrightnessMethods;"
                + "$myMonitor.wmisetbrightness($delay, $brightness)";
        String command = "powershell.exe  " + s;
        // Executing the command
        Process powerShellProcess = Runtime.getRuntime().exec(command);

        powerShellProcess.getOutputStream().close();

        //Report any error messages
        String line;

        BufferedReader stderr = new BufferedReader(new InputStreamReader(
                powerShellProcess.getErrorStream()));
        line = stderr.readLine();
        if (line != null)
        {
            System.err.println("Standard Error:");
            do
            {
                System.err.println(line);
            } while ((line = stderr.readLine()) != null);

        }
        stderr.close();

    }
}

然后打电话
BrightnessManager.setBrightness({brightness});

其中{brightness}是您想要将屏幕显示设置为的亮度,其中0是支持的最暗亮度,100是最亮的亮度。

非常感谢anquegi提供的Powershell代码here,我使它适合于运行此命令。

09-30 14:39
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