adb shell dumpsys的使用

Android提供的dumpsys工具可以用于查看手机的系统服务信息与状态，比如cpu，memory。。。但dumpsys能够查询的信息实在太多，可以使用以下命令来讲能够使用的命令都列出来：

adb shell dumpsys | grep "DUMP OF SERVICE"

可以看到控制台输出：

tangbincheng@tangbinchengdeMacBook-Pro:~$ adb shell dumpsys | grep "DUMP OF SERVICE"
DUMP OF SERVICE DockObserver:
DUMP OF SERVICE SurfaceFlinger:
DUMP OF SERVICE accessibility:
DUMP OF SERVICE account:
DUMP OF SERVICE activity:
DUMP OF SERVICE alarm:
DUMP OF SERVICE android.security.keystore:
DUMP OF SERVICE appops:
DUMP OF SERVICE appwidget:
DUMP OF SERVICE assetatlas:
DUMP OF SERVICE audio:
DUMP OF SERVICE backup:
DUMP OF SERVICE battery:
DUMP OF SERVICE batteryproperties:
DUMP OF SERVICE batterystats:
DUMP OF SERVICE bluetooth_manager:
DUMP OF SERVICE clipboard:
DUMP OF SERVICE commontime_management:
DUMP OF SERVICE connectivity:
DUMP OF SERVICE consumer_ir:
DUMP OF SERVICE content:
DUMP OF SERVICE country_detector:
DUMP OF SERVICE cpuinfo:
DUMP OF SERVICE dbinfo:
DUMP OF SERVICE device_policy:
DUMP OF SERVICE devicestoragemonitor:
DUMP OF SERVICE diskstats:
DUMP OF SERVICE display:
DUMP OF SERVICE display.qservice:
DUMP OF SERVICE dreams:
DUMP OF SERVICE drm.drmManager:
DUMP OF SERVICE dropbox:
DUMP OF SERVICE edgegestureservice:
DUMP OF SERVICE ethernet:
DUMP OF SERVICE fingerprint:
DUMP OF SERVICE gfxinfo:
DUMP OF SERVICE hardware:
DUMP OF SERVICE imms:
DUMP OF SERVICE input:
DUMP OF SERVICE input_method:
DUMP OF SERVICE iphonesubinfo:
DUMP OF SERVICE isms:
DUMP OF SERVICE isub:
DUMP OF SERVICE jobscheduler:
DUMP OF SERVICE launcherapps:
DUMP OF SERVICE location:
DUMP OF SERVICE lock_settings:
DUMP OF SERVICE media.audio_flinger:
DUMP OF SERVICE media.audio_policy:
DUMP OF SERVICE media.camera:
DUMP OF SERVICE media.player:
DUMP OF SERVICE media.sound_trigger_hw:
DUMP OF SERVICE media_projection:
DUMP OF SERVICE media_router:
DUMP OF SERVICE media_session:
DUMP OF SERVICE meminfo:
DUMP OF SERVICE mount:
DUMP OF SERVICE netpolicy:
DUMP OF SERVICE netstats:
DUMP OF SERVICE network_management:
DUMP OF SERVICE network_score:
DUMP OF SERVICE nfc:
DUMP OF SERVICE notification:
DUMP OF SERVICE package:
DUMP OF SERVICE permission:
DUMP OF SERVICE phone:
DUMP OF SERVICE power:
DUMP OF SERVICE print:
DUMP OF SERVICE procstats:
DUMP OF SERVICE profile:
DUMP OF SERVICE restrictions:
DUMP OF SERVICE rttmanager:
DUMP OF SERVICE samplingprofiler:
DUMP OF SERVICE scheduling_policy:
DUMP OF SERVICE search:
DUMP OF SERVICE sensorservice:
DUMP OF SERVICE serial:
DUMP OF SERVICE servicediscovery:
DUMP OF SERVICE simphonebook:
DUMP OF SERVICE sip:
DUMP OF SERVICE statusbar:
DUMP OF SERVICE telecom:
DUMP OF SERVICE telephony.registry:
DUMP OF SERVICE textservices:
DUMP OF SERVICE themes:
DUMP OF SERVICE trust:
DUMP OF SERVICE uimode:
DUMP OF SERVICE updatelock:
DUMP OF SERVICE usagestats:
DUMP OF SERVICE usb:
DUMP OF SERVICE user:
DUMP OF SERVICE vibrator:
DUMP OF SERVICE voiceinteraction:
DUMP OF SERVICE wallpaper:
DUMP OF SERVICE webviewupdate:
DUMP OF SERVICE wifi:
DUMP OF SERVICE wifip2p:
DUMP OF SERVICE wifiscanner:
DUMP OF SERVICE window:

从上面可以看出dumpsys可以使用的命令参数非常多，“DUMP OF SERVICE”关键字后面的单词都可以直接通过 “dumpsys + 参数” 查看相关信息，具体每一个如何使用可以使用 “dumpsys + 参数 + -h ”查看帮助的办法。

比如：

tangbincheng@tangbinchengdeMacBook-Pro:~$ adb shell 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[ibraries]: list device features
k[eysets]: print known keysets
r[esolvers]: dump intent resolvers
perm[issions]: dump permissions
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
version: print database version info
write: write current settings now
<package.name>: info about given package
installs: details about install sessions