获取某个app的userid的方法

1、通过adb shell ps|grep package获取进程pid,执行adb shell cat /proc/<pid>/status获取Uid=10099

State:  S (sleeping)
Tgid:   11861
Pid:    11861
PPid:   544
TracerPid:      0
Uid:    10099   10099   10099   10099
Gid:    10099   10099   10099   10099
Ngid:   0
FDSize: 128
Groups: 3003 9997 50099
VmPeak:  2167612 kB
VmSize:  2122792 kB
VmLck:         0 kB
VmPin:         0 kB
VmHWM:    154452 kB
VmRSS:    149980 kB
VmData:   213440 kB
VmStk:      8196 kB
VmExe:        16 kB
VmLib:    137876 kB
VmPTE:      1032 kB
VmSwap:        0 kB

2、通过执行adb shell cat /data/system/packages.xml(package.list)获取uid=10099

        <item name="com.miui.userguide.permission.MIPUSH_RECEIVE" package="com.miui.userguide" protection="2" />
    <package name="com.miui.userguide" codePath="/system/app/Userguide" nativeLibraryPath="/system/app/Userguide/lib" publicFlags="944291397" privateFlags="0" pkgFlagsEx="0" ft="1671b848950" it="166a7009830" ut="1671b848950" version="10010203" userId="10099" cpuAbiDerived="true" installer="com.xiaomi.market">
            <item name="com.miui.userguide.permission.MIPUSH_RECEIVE" granted="true" flags="0" />