dumpsys-package
ams和pms是android系统最重要的系统服务，本文解析dumpsys package命令，看哪些PMS相关的系统信息,数据结构是运行时可以查看的。
命令提示
console:/ # dumpsys package -h
Package manager dump options:
[-h] [-f] [--checkin] [cmd] ...
--checkin: dump for a checkin
-f: print details of intent filters
-h: print this help
cmd may be one of:
l[ibraries]: list known shared libraries
f[eatures]: list device features
k[eysets]: print known keysets
r[esolvers] [activity|service|receiver|content]: dump intent resolvers
perm[issions]: dump permissions
permission [name ...]: dump declaration and use of given permission
pref[erred]: print preferred package settings
preferred-xml [--full]: print preferred package settings as xml
prov[iders]: dump content providers
p[ackages]: dump installed packages
s[hared-users]: dump shared user IDs
m[essages]: print collected runtime messages
v[erifiers]: print package verifier info
d[omain-preferred-apps]: print domains preferred apps
i[ntent-filter-verifiers]|ifv: print intent filter verifier info
version: print database version info
write: write current settings now
installs: details about install sessions
check-permission <permission> <package> [<user>]: does pkg hold perm?
dexopt: dump dexopt state
compiler-stats: dump compiler statistics
service-permissions: dump permissions required by services
<package.name>: info about given package
AuthBlog：秋城https://www.cnblogs.com/houser0323
数据结构
| 命令 | 源码 | 关键字 | 释义 |
|---|---|---|---|
| l[ibraries] | mSharedLibraries | Libraries: | 所有库信息 |
| f[eatures] | mAvailableFeatures | Features: | 系统支持的feature |
| k[eysets] | mSettings.mKeySetManagerService.dumpLPr() | Key Set Manager: | keyset信息 |
| r[esolvers] | IntentResolver.java#dump() | Activity Resolver Table: | 所有四大组件intent接收器信息 |
| perm[issions] | mSettings.dumpPermissionsLPr() | Permissions: | 所有权限信息 |
| permission [name ...] | mSettings.dumpPermissionsLPr() | Permissions: | 特定权限信息 |
| pref[erred] | PreferredIntentResolver#dump() | Preferred Activities User | launcher activity偏好信息 |
| preferred-xml [--full] | mSettings.writePreferredActivitiesLPr | 生成xml | |
| prov[iders] | PackageParser.Provider mProviders.mProviders | Registered ContentProviders: | 所有ContentProvider信息 |
| p[ackages] | mSettings.dumpPackagesLPr() | Packages: | 所有package信息 |
| s[hared-users] | mSettings.dumpSharedUsersLPr() | Shared users: | 所有共享uid信息 |
| m[essages] | mSettings.dumpReadMessagesLPr()/dumpCriticalInfo() | Settings parse messages | 读系统packageSetting解析信息mReadMessages、读uiderrors.txt |
| v[erifiers] | mRequiredVerifierPackage | Verifiers: | 需要验证的apk |
| d[omain-preferred-apps] | PackageSetting#getIntentFilterVerificationInfo() | App verification status: | 域验证信息 |
| i[ntent-filter-verifiers] | mIntentFilterVerifierComponent | Intent Filter Verifier: | AppLink相关 |
| version | mSettings.dumpVersionLPr() | Database versions: | 数据库版本 |
| write | mSettings.writeLPr() | 这是写操作用于替换packages.xml | |
| installs | mInstallerService.dump() | Active install sessions: | 活动中的install session信息 |
| check-permission |
checkPermission() | 返回值0表有；-1表无 | |
| dexopt | dumpDexoptStateLPr() | Dexopt state: | 所有apk的dexopt信息 |
| compiler-stats | dumpCompilerStatsLPr() | Compiler stats: | 所有apk的编译器信息 |
| service-permissions | serviceInfo.permission | Service permissions: | 所有service的权限信息 |
| <package.name> | DumpState.OPTION_SHOW_FILTERS | 特定apk的所有信息-最常用 |
常用操作
1.包名和apk名互查
$ dumpsys package com.android.systemui |grep -i path
codePath=/system/priv-app/SystemUI
resourcePath=/system/priv-app/SystemUI
path: /system/priv-app/SystemUI/SystemUI.apk
知道包名查路径还可以用pm path <package name>更方便，但是知道apk名称查包名就需要dumpsys了，如下
$ dumpsys package p |grep -B 5 SystemUI|grep Package
Package [com.android.systemui] (633b2ed):
pkg=Package{8e872f3 com.android.systemui}
2.查看系统支持的feature
与pm list features命令作用相同
$ dumpsys package f
......
android.hardware.bluetooth
android.hardware.usb.host
......
3.查看apk权限信息
$ dumpsys package <package name>
打印中查找关键字
- "declared permissions:"应用自定义权限
- "requested permissions:"AndroidManifest.xml文件中所有request的权限
- "install permissions:"安装时就赋予的权限
- "runtime permissions:"运行时权限
4.查看apk的flag信息
查看某个apk的flag信息,如systemui
$ dumpsys package com.android.systemui |grep Flags
privateFlags=[ PRIVATE_FLAG_ACTIVITIES_RESIZE_MODE_RESIZEABLE_VIA_SDK_VERSION DEFAULT_TO_DEVICE_PROTECTED_STORAGE DIRECT_BOOT_AWARE PRIVILEGED ]
pkgFlags=[ SYSTEM HAS_CODE PERSISTENT ]
可以看到systemui是system系统应用也是persistent应用，如果要查找所有的system应用可以用pm list packages -s,查找所有PERSISTENT的应用呢，可以dumpsys package p然后在结果中过滤，除此之外还有另外两种方法dumpsys meminfo和logcat -b events |grep -i am_proc_start
总结
dumpsys是一个很强大的命令，大多数的系统信息都可以用它抓出来，当你想快捷获取系统信息又没有思路时，不妨尝试一下dumpsys，会有惊喜。
dumpsys package能轻松获取多数的PMS数据结构的值，还能替换更新packages.xml。
示例中也多次提到pm命令，这俩结合的话，有关PMS模块的大部分系统信息和操作都可以便捷实现，有效提高开发调试速度。