1、从手机截图到sdcard

2、将图片导出到PC

3、从PC加载图片

4、开启定时器

1、

    private static void takeScreenshot(String path) {
        long t1 = System.currentTimeMillis();
        String command = "adb devices"; // 替换为你需要执行的shell命令
        String command1 = "adb shell screencap -p /sdcard/screencap.png"; // 替换为你需要执行的shell命令
        String command2 = "adb pull /sdcard/screencap.png " + path; // 替换为你需要执行的shell命令
        String command3 = "adb shell rm /sdcard/screencap.png"; // 替换为你需要执行的shell命令
        String command4 = "rm -rf " + path; // 替换为你需要执行的shell命令
        try {
//            Process process = Runtime.getRuntime().exec(command);
            Process process1 = Runtime.getRuntime().exec(command1);
            Process process2 = Runtime.getRuntime().exec(command2);
            Process process3 = Runtime.getRuntime().exec(command3);
//            Process process4 = Runtime.getRuntime().exec(command4);

//            {
//                BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
//                String line;
//                while ((line = reader.readLine()) != null) {
//                    System.out.println(line);
//                }
//            }
            {
                BufferedReader reader = new BufferedReader(new InputStreamReader(process1.getInputStream()));
                String line;
                while ((line = reader.readLine()) != null) {
                    System.out.println(line);
                }
            }
//            {
//                BufferedReader reader = new BufferedReader(new InputStreamReader(process2.getInputStream()));
//                String line;
//                while ((line = reader.readLine()) != null) {
//                    System.out.println(line);
//                }
//            }
//            {
//                BufferedReader reader = new BufferedReader(new InputStreamReader(process3.getInputStream()));
//                String line;
//                while ((line = reader.readLine()) != null) {
//                    System.out.println(line);
//                }
//            }
//            {
//                BufferedReader reader = new BufferedReader(new InputStreamReader(process4.getInputStream()));
//                String line;
//                while ((line = reader.readLine()) != null) {
//                    System.out.println(line);
//                }
//            }

            long t2 = System.currentTimeMillis();
            System.out.println("takeScreenshot Exited with code: 时间：" + (t2 - t1));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

2、

static BufferedImage getImage(String folderPath) {
    long t1 = System.currentTimeMillis();
    File folder = new File(folderPath);
    File[] listOfFiles = folder.listFiles();
    BufferedImage bufferedImage = null;
    for (File file : listOfFiles) {
        if (file.isFile() && file.getName().toLowerCase().endsWith(".png") || file.getName().toLowerCase().endsWith(".jpg") || file.getName().toLowerCase().endsWith(".jpeg")) {
            try {
                bufferedImage = ImageIO.read(file);
                // 1080*2340
                System.out.println("getImage " + bufferedImage.getWidth());
                System.out.println("getImage " + bufferedImage.getHeight());
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                long t2 = System.currentTimeMillis();
                System.out.println("getImage : 时间：" + (t2 - t1));
                return bufferedImage;
            }
        }
    }
    return null;
}

3、

    static JFrame jFrame;
    static JLabel jLabel;

    static void showFrame(BufferedImage screenFullImage) {
        // 1080*2340
        jFrame = new JFrame("Screen Capture");
        jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jLabel = new JLabel("");
        //设置标签大小，这种可以设计成自己想要大小
        jLabel.setBounds(0, 0, 500, 900);
        //将图片进行转换添加到标签当中  这个是工具类，具体参考下面给出代码
        setImgSize(screenFullImage, jLabel);
        jFrame.add(jLabel);
        jFrame.pack();
//        frame.setSize(300,600);     // 设置JFrame的尺寸
        jFrame.setVisible(true);
    }

4、

private static final int DELAY = 400; // 帧间隔，单位毫秒

public static void main(String[] args) {
    String path = "/Users/Desktop/command/png2";
    takeScreenshot(path);
    BufferedImage image = getImage(path);
    showFrame(image);
    Timer timer = new Timer(DELAY, new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            System.out.println("actionPerformed");
            takeScreenshot(path);
            BufferedImage screenFullImage = getImage(path);
            setImgSize(screenFullImage, jLabel);
        }
    });
    timer.start();
}

5、