reference to : http://www.open-open.com/lib/view/open1405061994872.html
Android提供的dumpsys工具可以用于查看感兴趣的系统服务信息与状态，手机连接电脑后可以直接命令行执行adb shell dumpsys 查看所有支持的Service但是这样输出的太多，可以通过dumpsys | grep "DUMP OF SERVICE" 仅显示主要的Service的信息
一、列出dumpsys所有支持命令
$ dumpsys | grep "DUMP OF SERVICE"
以下是在三星S3手机上的输出信息
shell@m:/ $ dumpsys | grep "DUMP OF SERVICE"
dumpsys | grep "DUMP OF SERVICE"
DUMP OF SERVICE AtCmdFwd:
DUMP OF SERVICE CustomFrequencyManagerService:
DUMP OF SERVICE DirEncryptService:
DUMP OF SERVICE Exynos.HWCService:
DUMP OF SERVICE Exynos.IPService:
DUMP OF SERVICE FMPlayer:
DUMP OF SERVICE LEDService:
DUMP OF SERVICE SecTVOutService:
DUMP OF SERVICE SurfaceFlinger:
DUMP OF SERVICE TvoutService_C:
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 application_policy:
DUMP OF SERVICE appops:
DUMP OF SERVICE appwidget:
DUMP OF SERVICE audio:
DUMP OF SERVICE backup:
DUMP OF SERVICE battery:
DUMP OF SERVICE batteryinfo:
DUMP OF SERVICE bluetooth_manager:
DUMP OF SERVICE bluetooth_secure_mode_manager:
DUMP OF SERVICE clipboard:
DUMP OF SERVICE clipboardEx:
DUMP OF SERVICE commontime_management:
DUMP OF SERVICE connectivity:
DUMP OF SERVICE container_service:
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 dreams:
DUMP OF SERVICE drm.drmManager:
DUMP OF SERVICE dropbox:
DUMP OF SERVICE edmnativehelper:
DUMP OF SERVICE enterprise_license_policy:
DUMP OF SERVICE enterprise_policy:
DUMP OF SERVICE entropy:
DUMP OF SERVICE gfxinfo:
DUMP OF SERVICE hardware:
DUMP OF SERVICE harmony_eas_service:
DUMP OF SERVICE input:
DUMP OF SERVICE input_method:
DUMP OF SERVICE iphonesubinfo:
DUMP OF SERVICE isms:
DUMP OF SERVICE license_log_service:
DUMP OF SERVICE location:
DUMP OF SERVICE lock_settings:
DUMP OF SERVICE log_manager_service:
DUMP OF SERVICE mdm.remotedesktop:
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 meminfo:
DUMP OF SERVICE motion_recognition:
DUMP OF SERVICE mount:
DUMP OF SERVICE multiwindow:
DUMP OF SERVICE netpolicy:
DUMP OF SERVICE netstats:
DUMP OF SERVICE network_management:
DUMP OF SERVICE nfc:
DUMP OF SERVICE nfccontroller:
DUMP OF SERVICE notification:
DUMP OF SERVICE package:
DUMP OF SERVICE permission:
DUMP OF SERVICE phone:
DUMP OF SERVICE phone_restriction_policy:
DUMP OF SERVICE phoneext:
DUMP OF SERVICE power:
DUMP OF SERVICE remoteinjection:
DUMP OF SERVICE samplingprofiler:
DUMP OF SERVICE samsung.smartfaceservice:
DUMP OF SERVICE scheduling_policy:
DUMP OF SERVICE search:
DUMP OF SERVICE sec_analytics:
DUMP OF SERVICE secontroller:
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 telephony.registry:
DUMP OF SERVICE textservices:
DUMP OF SERVICE tvoutservice:
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 voip:
DUMP OF SERVICE wallpaper:
DUMP OF SERVICE wfd:
DUMP OF SERVICE wifi:
DUMP OF SERVICE wifi_policy:
DUMP OF SERVICE wifip2p:
DUMP OF SERVICE window:
二、具体命令如何查看帮助
从上面可以看出Service非常多，“DUMP OF SERVICE”关键字后面的单词都可以直接通过 dumpsys + 单词 查看相关信息，具体每一个如何使用有一种通用的查看帮助的办法。
查看每一个命令的使用帮助，以下以meminfo 为例演示：
shell@m:/ $ dumpsys meminfo -h
dumpsys meminfo -h
meminfo dump options: [-a] [--oom] [process]
-a: include all available information for each process.
--oom: only show processes organized by oom adj.
If [process] is specified it can be the name or
pid of a specific process to dump.
三、一些关键命令解释
| 名字 | 功能 |
| account | 显示accounts信息 |
| activity | 显示所有的activities的信息 |
| cpuinfo | 显示CPU信息 |
| window | 显示键盘，窗口和它们的关系 |
| wifi | 显示wifi信息 |
| batteryinfo $package_name | 电量信息及CPU 使用时长 |
| package packagename | 获取安装包信息 |
| usagestats | 每个界面启动的时间 |
| statusbar | 显示状态栏相关的信息 |
| meminfo |
内存信息（meminfo $package_name or $pid
使用程序的包名或者进程id显示内存信息）
|
| diskstats | 磁盘相关信息 |
| battery | 电池信息 |
| alarm | 显示Alarm信息 |
activity - 使用adb shell dumpsys检测Android的Activity任务栈
statusbar - 找出广告通知属于哪个应用
dumpsys statusbar | grep notification=Notification