dumpsys命令实在是太强大了，包含了太多的命令，这篇文档我打算一点点的写。

命令概要

dumpsys在源码的/frameworks/native/cmds/dumpsys目录

支持的所有命令

在这么多命令中，我比较常用的有
dumpsys activity

dumpsys activity

执行dumpsys activity -h可以看到如下帮助文档

chiron:/ # dumpsys activity -h
Activity manager dump options:
  [-a] [-c] [-p PACKAGE] [-h] [WHAT] ...
  WHAT may be one of:
    a[ctivities]: activity stack state
    r[recents]: recent activities state
    b[roadcasts] [PACKAGE_NAME] [history [-s]]: broadcast state
    broadcast-stats [PACKAGE_NAME]: aggregated broadcast statistics
    i[ntents] [PACKAGE_NAME]: pending intent state
    p[rocesses] [PACKAGE_NAME]: process state
    o[om]: out of memory management
    perm[issions]: URI permission grant state
    prov[iders] [COMP_SPEC ...]: content provider state
    provider [COMP_SPEC]: provider client-side state
    s[ervices] [COMP_SPEC ...]: service state
    as[sociations]: tracked app associations
    settings: currently applied config settings
    service [COMP_SPEC]: service client-side state
    package [PACKAGE_NAME]: all state related to given package
    all: dump all activities
    top: dump the top activity
  WHAT may also be a COMP_SPEC to dump activities.
  COMP_SPEC may be a component name (com.foo/.myApp),
    a partial substring in a component name, a
    hex object identifier.
  -a: include all available server state.
  -c: include client state.
  -p: limit output to given package.
  --checkin: output checkin format, resetting data.
  --C: output checkin format, not resetting data.

使用实例

dumpsys activity -p com.ss.android.article.news services // 查看service状态

dumpsys activity | grep mResumedActivity // 查看显示的activity

dumpsys所有命令

使用dumpsys -l 可以查看所有的子命令

可以看到支持的命令有这么多：

Currently running services:
DockObserver
MiuiBackup
MiuiInit
ProcessManager
SurfaceFlinger
accessibility
account
activity
alarm
android.security.keystore
android.service.gatekeeper.IGateKeeperService
appops
appwidget
audio
autofill
backup
battery
batteryproperties
batterystats
bluetooth_manager
carrier_config
clipboard
cneservice
com.goodix.FingerprintService
com.qualcomm.location.izat.IzatService
commontime_management
companiondevice
connectivity
connmetrics
consumer_ir
content
contexthub
country_detector
cpuinfo
dbinfo
device_identifiers
device_policy
deviceidle
devicestoragemonitor
diskstats
display
dpmservice
dreams
drm.drmManager
dropbox
ethernet
extphone
fingerprint
gfxinfo
gpu
graphicsstats
hardware_properties
imms
input
input_method
installd
iphonesubinfo
isms
isub
jobscheduler
launcherapps
location
locationpolicy
lock_settings
media.audio_flinger
media.audio_policy
media.camera
media.camera.proxy
media.cas
media.drm
media.extractor
media.metrics
media.player
media.radio
media.resource_manager
media.sound_trigger_hw
media_projection
media_resource_monitor
media_router
media_session
meminfo
midi
miui.contentcatcher.ContentCatcherService
miui.face.FaceService
miui.fdpp
miui.mqsas.IMQSNative
miui.mqsas.MQSService
miui.sedc
miui.shell
miui.whetstone.klo
miui.whetstone.mcd
miui.whetstone.power
mount
netd
netd_listener
netpolicy
netstats
network_management
network_score
network_time_update_service
nfc
notification
oem_lock
otadexopt
overlay
package
perfshielder
permission
persistent_data_block
phone
pinner
power
print
processinfo
procstats
qti.ims.ext
recovery
restrictions
rttmanager
samplingprofiler
scheduling_policy
search
sec_key_att_app_id_provider
security
sensorservice
serial
servicediscovery
settings
shortcut
simphonebook
sip
sms-sec
soundtrigger
statusbar
storaged
storagestats
telecom
telephony.registry
textservices
trust
uimode
updatelock
usagestats
usb
user
vibrator
voiceinteraction
vrmanager
wallpaper
webviewupdate
whetstone.activity
wifi
wificond
wifip2p
wifiscanner
window
xiaomi.joyose