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

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。