利用Dumpsys做系统诊断

1.利用Dumpsys做系统诊断

可以利用Android系统自带的dumpsys工具检测系统服务的运行状态。通过运行#adb shell dumpsys命令，可以获取所有系统服务的输出，如果想要获取某些服务的输出，比如input事件（触摸事件或者按键事件）的，可以利用如下命令：$ adb shell dumpsys input。

2.通过#$ adb shell dumpsys input

可以查询到系统中所有的系统服务，如下：

Currently runningservices:

SurfaceFlinger

accessibility

account

activity

alarm

android.security.keystore

appops

appwidget

assetatlas

audio

backup

battery

batterypropreg

batterystats

bluetooth_manager

breathinglight

clipboard

commontime_management

connectivity

consumer_ir

content

country_detector

cpuinfo

dbinfo

device_policy

devicestoragemonitor

diskstats

display

display.qservice

dreams

drm.drmManager

dropbox

entropy

gfxinfo

haptics

hardware

input

input_method

iphonesubinfo

iphonesubinfo_msim

isms

isms_msim

listen.service

location

lock_settings

media.audio_flinger

media.audio_policy

media.camera

media.player

media_router

meminfo

mount

netpolicy

netstats

network_management

notification

nproot

nubia-iphonesubinfo

nubia-phone

nubia-simphonebook

nubia-tel-callback

nubia.clipserviceext

nubia.tel.extra

package

permission

phone

phone_msim

power

procstats

samplingprofiler

scheduling_policy

security.root

sensorservice

serial

servicediscovery

simphonebook

simphonebook_msim

sip

statusbar

telephony.msim.registry

telephony.registry

textservices

uimode

updatelock

usagestats

usb

user

vibrator

wakeGesture

wallpaper

wifi

wifip2p

window

3.通过在dumpsys后卖弄添加-c参数，可以使获取到的某些服务的信息更加易读。

比如获取power的信息：

#adb shell dumpsys power –c

输出如下：

Display PowerState:

mScreenOn=true

mScreenBrightness=10

mScreenReady=true

mScreenUpdatePending=false

mElectronBeamPrepared=false

mElectronBeamLevel=1.0

mElectronBeamReady=true

mElectronBeamDrawPending=false

PhotonicModulator State:

mPendingOn=true

mPendingBacklight=10

mActualOn=true

mActualBacklight=10

mChangeInProgress=false

Electron BeamState:

mPrepared=false

mMode=2

mDisplayLayerStack=0

mDisplayWidth=720

mDisplayHeight=1280

mSurfaceVisible=false

mSurfaceAlpha=0.0

Wireless ChargerDetector State:

mGravitySensor=null

mPoweredWirelessly=false

mAtRest=false

mRestX=0.0, mRestY=0.0, mRestZ=0.0

mDetectionInProgress=false

mDetectionStartTime=0 (never)

mMustUpdateRestPosition=false

mTotalSamples=0

mMovingSamples=0

mFirstSampleX=0.0, mFirstSampleY=0.0,mFirstSampleZ=0.0

 mLastSampleX=0.0, mLastSampleY=0.0, mLastSampleZ=0.0

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