IoTGateway/BSP/Android/Gettingstarted/How to set rotation

shell@rsb4680:/ $ su

root@rsb4680:/ # mount -rw -o remount /system

/* EXT4-fs (mmcblk0p10): re-mounted. Opts: (null) */

root@rsb4680:/ # busybox vi /system/build.prop

/* “find ro.sf.hwrotation，select  one of the values［0、90、180、270］  eg. 'ro.sf.hwrotation=90' ” */

root@rsb4680:/ # reboot