Android 使用date set命令修改系统时间

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Android 使用date set命令修改系统时间

2023-05-05 13:26| 来源: 网络整理| 查看: 265

测试环境：android 7.1.1

在adb shell中试图使用 date -s "yyyymmdd.[[[hh]mm]ss]"修改系统系统时间时，会提示 date: Unknown option s

usage: date [-u] [-r FILE] [-d DATE] [+DISPLAY_FORMAT] [-D SET_FORMAT] [SET] Set/get the current date/time. With no SET shows the current date. Default SET format is "MMDDhhmm[[CC]YY][.ss]", that's (2 digits each) month, day, hour (0-23), and minute. Optionally century, year, and second. Also accepts "@UNIXTIME[.FRACTION]" as seconds since midnight Jan 1 1970. -d Show DATE instead of current time (convert date format) -D +FORMAT for SET or -d (instead of MMDDhhmm[[CC]YY][.ss]) -r Use modification time of FILE instead of current date -u Use UTC instead of current timezone +FORMAT specifies display format string using these escapes: %% literal % %n newline %t tab %S seconds (00-60) %M minute (00-59) %m month (01-12) %H hour (0-23) %I hour (01-12) %p AM/PM %y short year (00-99) %Y year %C century %a short weekday name %A weekday name %u day of week (1-7, 1=mon) %b short month name %B month name %Z timezone name %j day of year (001-366) %d day of month (01-31) %e day of month ( 1-31) %s seconds past the Epoch %U Week of year (0-53 start sunday) %W Week of year (0-53 start monday) %V Week of year (1-53 start monday, week < 4 days not part of this year) %D = "%m/%d/%y" %r = "%I : %M : %S %p" %T = "%H:%M:%S" %h = "%b" %x locale date %X locale time %c locale date/time date: Unknown option s

根据提示，使用以下命令

命令格式：date MMddHHmmyyyy.ss set （月日时分年.秒）例如：date 052514192019.22 set

date只是修改了系统时间，还应该把系统时间同步硬件时钟，否则系统重启后，时间是不会保存的

系统时间同步硬件时钟，可以用命令

busybox hwclock -w

busybox hwclock 语法如下

usage: hwclock [-rswtluf] -f FILE Use specified device file instead of /dev/rtc (--rtc) -l Hardware clock uses localtime (--localtime) -r Show hardware clock time (--show) -s Set system time from hardware clock (--hctosys) -t Set the system time based on the current timezone (--systz) -u Hardware clock uses UTC (--utc) -w Set hardware clock from system time (--systohc)

　　常用的是

busybox hwclock -w --从系统时间设置到硬件时钟 busybox hwclock -s --从硬件时钟设置到系统时间

Android代码（Android系统需要能获取root权限）

/** * 执行Android命令 * @param cmd 命令 */ private static void execSuCmd(String cmd) { Process process = null; DataOutputStream os = null; DataInputStream is = null; try { process = Runtime.getRuntime().exec("su"); os = new DataOutputStream(process.getOutputStream()); os.writeBytes(cmd + "\n"); os.writeBytes("exit\n"); os.flush(); int aa = process.waitFor(); is = new DataInputStream(process.getInputStream()); byte[] buffer = new byte[is.available()]; is.read(buffer); String out = new String(buffer); } catch (Exception e) { e.printStackTrace(); } finally { try { if (os != null) { os.close(); } if (is != null) { is.close(); } if (process != null){ process.destroy(); } } catch (Exception e) { } } }

调用示例

String curr_time = “052514412019.52”; execSuCmd("date " + curr_time + "\n busybox hwclock -w\n");

参考：https://blog.csdn.net/q1075355798/article/details/84660423

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Android 使用date set命令修改系统时间

Android 使用date set命令修改系统时间

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