使用 java 将从 adb shell getevent 获取的时间戳转换为 hh:mm:ss.SSS 格式

Question

我正在尝试使用以下命令转换从 adb shell getevent 捕获的时间戳

adb shell getevent -lt /dev/input/event2 >filepath/filename.txt

这给出了如下所示的输出

  [   19393.303318] EV_ABS       ABS_MT_TRACKING_ID   00000b87
  [   19393.303318] EV_ABS       ABS_MT_POSITION_X    00000180
  [   19393.303318] EV_ABS       ABS_MT_POSITION_Y    000004e2
  [   19393.303318] EV_ABS       ABS_MT_PRESSURE      0000004c
  [   19393.303318] EV_ABS       ABS_MT_TOUCH_MAJOR   00000001
  [   19393.303318] EV_SYN       SYN_REPORT           00000000

这里看到的时间戳是19393.303318，不是正常的时间格式

如何使用 JAVA

将其转换为 hh:mm:ss:SSS 格式

如果可能，有没有其他方法可以为 adb shell getevent

获取正确的时间格式

提前致谢

Answer 1

它看起来像是开机后的秒数。要获得启动时刻的绝对时间戳，您可以使用如下内容：System.currentTimeMillis() - SystemClock.elapsedRealtime().

Answer 2

这是你的答案。我认为您必须开始使用谷歌搜索您的查询。我不擅长 java，但这花了我 2 个小时来搜索和编写 this.Not 正确安排无论如何这有效，现在我可以使用相同的方法将 dmesg 转换为 adb shell 日期格式. 注意：- 在替换 date and uptime 时使用 - date;cat /proc/uptime inside adb shell 以同时获取两者（不完全准确）

main method to convert getevent file

public static void convertGetEventFiletoHumanReadableTime(
        String geteventFileLocation) throws ParseException, IOException {

    SimpleDateFormat adbDatefmt = new SimpleDateFormat(
            "EEE MMM dd hh:mm:ss z yyyy");
    String adbDate = "Mon Jan  4 21:23:19 KST 2016"; //replace with your adb shell date
    String uptime = "33224.56 242604.45" //replace with your device cat adb shell /proc/uptime
    uptime = uptime.split(" ")[0];
    String event = "/dev/input/event1" //replace with event type you need to

    BufferedReader br = new BufferedReader(
            new FileReader(dmesgFileLocation));
    try {
        StringBuilder sb = new StringBuilder();
        String line = br.readLine();

        int lineNum = 0;
        while (line != null) {

            // System.out.println(lineNum + ": " + line); //for debug
            if (line.trim().length() > 0) {
                String eventTimeStamp = getEventTimeStamp(line, event);
                System.out.println("TIME " + eventTimeStamp);
                float eventTimeF = Float.parseFloat(eventTimeStamp);
                float eventTimeMillisecF = (float) (Math
                        .round(eventTimeF * 100.0) / 100.0);

                Date dmesghTime = convertGeteventTimestampToHumanReadable(
                        uptime, adbDate, eventTimeMillisecF);
                line = line.replace(eventTimeStamp,
                        adbDatefmt.format(dmesghTime));

                sb.append(line);
                sb.append(System.lineSeparator());
            }
            line = br.readLine();
            lineNum++;
        }
        String everything = sb.toString();
        // System.out.println(everything);
        try {
            FileWriter fw = new FileWriter("/getevent_humanTime.txt", true);
            fw.write(everything);
            fw.close();
        } catch (IOException e) {
            System.out.println("Something happened - here's what I know: ");
            e.printStackTrace();

        }
    } finally {
        br.close();
    }
}

method to get event timestamp from each line

public static String getEventTimeStamp(String event_string, String pattern) {

    Pattern pTime = Pattern
            .compile("\[.*(\d\d\d\d\d\.\d\d\d\d\d\d)\].*"
                    + pattern);
    Matcher mTime = pTime.matcher(event_string);

    String time = null;
    if (mTime.find()) {
        System.out.println("Time " + mTime.group(1));
        time = mTime.group(1);
    }
    return time;
}

method to convert epoch time to human readable [ round to millisec]

public static Date convertGeteventTimestampToHumanReadable(String  uptime,String adbDate , float secTimestamp)
        throws ParseException {


    System.out.println("DEVICE UPTIME IN SECS " + uptime);

    float uptimeMilliSecF = Float.parseFloat(uptime) * 1000;
    int uptimeMilliSec = Float.valueOf(uptimeMilliSecF).intValue();

    int dmesgtimeinMillisec = (int) (secTimestamp * 1000);

    SimpleDateFormat adbDatefmt = new SimpleDateFormat(
            "EEE MMM dd hh:mm:ss z yyyy");
    Date date = adbDatefmt.parse(adbDate);
    System.out.println("ADB DATE: " + date);

    Calendar calendar = Calendar.getInstance();
    calendar.setTime(date);

    calendar.add(Calendar.MILLISECOND, -uptimeMilliSec);
    System.out.println("ADB DATE AT DEVICE UP: " + calendar.getTime());

    calendar.add(Calendar.MILLISECOND, dmesgtimeinMillisec);
    System.out.println("ADB DATE FOR DMESG EVENT: " + calendar.getTime());

    return calendar.getTime();

}

Answer 3

我终于发现 getevent 的输出是基于 uptimeMillis() 而不是 elapsedRealtime()。就像 getEventTime: https://developer.android.com/reference/android/view/InputEvent.html#getEventTime().

我使用这个 uptimeMillis 得到正确的时间戳。

使用 java 将从 adb shell getevent 获取的时间戳转换为 hh:mm:ss.SSS 格式

Convert timestamp obtained from adb shell getevent to hh:mm:ss.SSS format using java

java

datetime

android

adb