无法读取到U盘文件adb shell "ps -A | grep update_engine"root 894 1 10869748 11056 0 0 S update_engineadb shell cat /proc/894/status |grep GroupsGroups: 1000 1015 1023 1077 2001 3003 3010adb shell "ps -A | grep update_engine"root 922 1 11015156 10816 0 0 S update_engineadb shell cat /proc/922/status |grep GroupsGroups: 1000 1023 2001 3003 3010 是不是 Groups: 1000 1015 1023 1077 2001 3003 3010 需要这个权限 1077才可