到http://www.busybox.net/downloads/binaries/下载放到sdcard

然后

adb shell

su

mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system //保证system可写

这里在android shell 内，sh:cp not found， 解决方法用"cat /mnt/sdcard/busybox > /system/xbin"

于是

cat /mnt/sdcard/busybox > /system/xbin

chmod 755 busybox

busybox ls显示还会乱码，于是

busybox ls --color=never

参考:

http://wangfeng0817.blog.163.com/blog/static/477385032012712777995/

http://www.cnblogs.com/xiaowenji/archive/2011/03/12/1982309.html

http://blog.csdn.net/yxz329130952/article/details/8725050