作为android开发工程师，出现了BUG是否苦于没有log而苦恼万分呢，以下敝人提供一套自动保存log的方法，供大家借鉴学习：
首先，在产品目录的init.XXX.rc文件中，添加相应的service，
# start log service
start logd
on property:service.logcat.enable=1
start logcat_service
on property:service.logcat.enable=0
stop logcat_service
# log services
service logcat_service /system/bin/logcat -b system -b events -b main -b radio -k -n 10 -v threadtime -r5000 -f /data/Logs/Log.0/l
user root
group log system
class main
disabled
service logd /system/bin/sh /system/bin/logd.sh
user system
group log
oneshot
然后，在目标平台的system/bin下添加脚本文件logd.sh，处理存储的log日志，以及设置属性，开启logcat_service,
#!/system/bin/sh
#
# Global folder & cmd params
#
OUTPUT_DIR=/data
LOG=Logs
index=2
LOG_DIR[0]=$OUTPUT_DIR/$LOG/Log.0
LOG_DIR[1]=$OUTPUT_DIR/$LOG/Log.1
LOG_DIR[2]=$OUTPUT_DIR/$LOG/Log.2
RM=rm
MV="mv"
MKDIR=mkdir
UMASK=umask
# set default permission 0775
$UMASK 002
# Init the three folders
i=0
while [ "$i" -le "$index" ]
do
$MKDIR -p ${LOG_DIR[$i]}
i=$(($i+1))
done
# Transfer the three folders
((i=$index-1))
$RM -r ${LOG_DIR[$index]}/*
while [ "$i" -ge "0" ]
do
$MV ${LOG_DIR[$i]}/* ${LOG_DIR[$i+1]}
i=$(($i-1))
done
$RM -r ${LOG_DIR[0]}/*
# start logcat service
setprop service.logcat.enable 1
mkdir /data/www
cp -R /system/var/www/ /data/
ln -s /storage/external/ /data/www/sdcard
诸位，鼓掌吧~~~~