常用的用法：
查看已经安装的包
pm list packages
查看已经安装的包以及apk路径（-3：只看第三方应用； -s：只看系统应用）
-f: see their associated file.
-d: filter to only show disbled packages.
-e: filter to only show enabled packages.
-s: filter to only show system packages.
-3: filter to only show third party packages.
pm list packages -f -3
列出指定包名的APK位置
pm path com.kp.poi
删除某个应用的所有数据（相当于全新安装）
pm clear com.UCMobile
禁用/启用某个应用（disable/enable）
pm disable com.android.systemui
列出硬件信息
pm list features
完整的用法：
usage: pm list packages [-f] [-d] [-e] [-s] [-3] [-i] [-u] [--user USER_ID] [FIL TER] pm list permission-groups pm list permissions [-g] [-f] [-d] [-u] [GROUP] pm list instrumentation [-f] [TARGET-PACKAGE] pm list features pm list libraries pm list users pm path PACKAGE pm dump PACKAGE pm install [-l] [-r] [-t] [-i INSTALLER_PACKAGE_NAME] [-s] [-f] [--algo <algorithm name> --key <key-in-hex> --iv <IV-in-hex>] [--originating-uri <URI>] [--referrer <URI>] PATH pm uninstall [-k] PACKAGE pm clear [--user USER_ID] PACKAGE pm enable [--user USER_ID] PACKAGE_OR_COMPONENT pm disable [--user USER_ID] PACKAGE_OR_COMPONENT pm disable-user [--user USER_ID] PACKAGE_OR_COMPONENT pm disable-until-used [--user USER_ID] PACKAGE_OR_COMPONENT pm block [--user USER_ID] PACKAGE_OR_COMPONENT pm unblock [--user USER_ID] PACKAGE_OR_COMPONENT pm grant PACKAGE PERMISSION pm revoke PACKAGE PERMISSION pm set-install-location [0/auto] [1/internal] [2/external] pm get-install-location pm set-permission-enforced PERMISSION [true|false] pm trim-caches DESIRED_FREE_SPACE pm create-user USER_NAME pm remove-user USER_ID pm get-max-users pm list packages: prints all packages, optionally only those whose package name contains the text in FILTER. Options: -f: see their associated file. -d: filter to only show disbled packages. -e: filter to only show enabled packages. -s: filter to only show system packages. -3: filter to only show third party packages. -i: see the installer for the packages. -u: also include uninstalled packages. pm list permission-groups: prints all known permission groups. pm list permissions: prints all known permissions, optionally only those in GROUP. Options: -g: organize by group. -f: print all information. -s: short summary. -d: only list dangerous permissions. -u: list only the permissions users will see. pm list instrumentation: use to list all test packages; optionally supply <TARGET-PACKAGE> to list the test packages for a particular application. Options: -f: list the .apk file for the test package. pm list features: prints all features of the system. pm list users: prints all users on the system. pm path: print the path to the .apk of the given PACKAGE. pm dump: print system state associated w ith the given PACKAGE. pm install: installs a package to the system. Options: -l: install the package with FORWARD_LOCK. -r: reinstall an exisiting app, keeping its data. -t: allow test .apks to be installed. -i: specify the installer package name. -s: install package on sdcard. -f: install package on internal flash. -d: allow version code downgrade. pm uninstall: removes a package from the system. Options: -k: keep the data and cache directories around after package removal. pm clear: deletes all data associated with a package. pm enable, disable, disable-user, disable-until-used: these commands change the enabled state of a given package or component (written as "package/class"). pm grant, revoke: these commands either grant or revoke permissions to applications. Only optional permissions the application has declared can be granted or revoked. pm get-install-location: returns the current install location. 0 [auto]: Let system decide the best location 1 [internal]: Install on internal device storage 2 [external]: Install on external media pm set-install-location: changes the default install location. NOTE: this is only intended for debugging; using this can cause applications to break and other undersireable behavior. 0 [auto]: Let system decide the best location 1 [internal]: Install on internal device storage 2 [external]: Install on external media pm trim-caches: trim cache files to reach the given free space. pm create-user: create a new user with the given USER_NAME, printing the new user identifier of the user. pm remove-user: remove the user with the given USER_IDENTIFIER, deleting all data associated with that user