Android4.2 在工程版机器上插入SD卡后自动运行SD卡根目录中的AutoRun.sh以实现动态开机动画、安装SD卡中指定目录中的apk到系统中等

SD卡插入后自动运行脚本框架实现（以nuclear-pfdq88d为例，其它项目可根据实际设备名称进行相应调整即可）：

1) 修改device/softwinner/nuclear-pfdq88d/init.sun5i.rc文末添加以下内容：

# added by shenjianjun for: do autorun once an extra sd card inserted. 2013.09.02 ..start

service extsdautorun /system/bin/busybox sh /mnt/extsd/AutoRun.sh

    class main

    user root

    group root

    disabled

    oneshot

on property:sys.extsdinserted=1

    start extsdautorun

on property:sys.extsdinserted=0

    stop extsdautorun

# added by shenjianjun for: do autorun once an extra sd card inserted. 2013.09.02 ..end

2) 按如下所示修改frameworks/base/services/java/com/android/server/MountService.java：

        // Tell PackageManager about changes to primary volume