转自：http://blog.csdn.net/androiddevelop/article/details/37689339

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

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print?
 >adbshell
 $dumpsys|grep"DUMPOFSERVICE"

以下是在我个人三星S3手机上的输出信息

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C:\Windows\System32>adbshell shell@m:/$dumpsys|grep"DUMPOFSERVICE"
 dumpsys|grep"DUMPOFSERVICE"
 DUMPOFSERVICEAtCmdFwd:
 DUMPOFSERVICECustomFrequencyManagerService:
 DUMPOFSERVICEDirEncryptService:
 DUMPOFSERVICEExynos.HWCService:
 DUMPOFSERVICEExynos.IPService:
 DUMPOFSERVICEFMPlayer:
 DUMPOFSERVICELEDService:
 DUMPOFSERVICESecTVOutService:
 DUMPOFSERVICESurfaceFlinger:
 DUMPOFSERVICETvoutService_C:
 DUMPOFSERVICEaccessibility:
 DUMPOFSERVICEaccount:
 DUMPOFSERVICEactivity:
 DUMPOFSERVICEalarm:
 DUMPOFSERVICEandroid.security.keystore:
 DUMPOFSERVICEapplication_policy:
 DUMPOFSERVICEappops:
 DUMPOFSERVICEappwidget:
 DUMPOFSERVICEaudio:
 DUMPOFSERVICEbackup:
 DUMPOFSERVICEbattery:
 DUMPOFSERVICEbatteryinfo:
 DUMPOFSERVICEbluetooth_manager:
 DUMPOFSERVICEbluetooth_secure_mode_manager:
 DUMPOFSERVICEclipboard:
 DUMPOFSERVICEclipboardEx:
 DUMPOFSERVICEcommontime_management:
 DUMPOFSERVICEconnectivity:
 DUMPOFSERVICEcontainer_service:
 DUMPOFSERVICEcontent:
 DUMPOFSERVICEcountry_detector:
 DUMPOFSERVICEcpuinfo:
 DUMPOFSERVICEdbinfo:
 DUMPOFSERVICEdevice_policy:
 DUMPOFSERVICEdevicestoragemonitor:
 DUMPOFSERVICEdiskstats:
 DUMPOFSERVICEdisplay:
 DUMPOFSERVICEdreams:
 DUMPOFSERVICEdrm.drmManager:
 DUMPOFSERVICEdropbox:
 DUMPOFSERVICEedmnativehelper:
 DUMPOFSERVICEenterprise_license_policy:
 DUMPOFSERVICEenterprise_policy:
 DUMPOFSERVICEentropy:
 DUMPOFSERVICEgfxinfo:
 DUMPOFSERVICEhardware:
 DUMPOFSERVICEharmony_eas_service:
 DUMPOFSERVICEinput:
 DUMPOFSERVICEinput_method:
 DUMPOFSERVICEiphonesubinfo:
 DUMPOFSERVICEisms:
 DUMPOFSERVICElicense_log_service:
 DUMPOFSERVICElocation:
 DUMPOFSERVICElock_settings:
 DUMPOFSERVICElog_manager_service:
 DUMPOFSERVICEmdm.remotedesktop:
 DUMPOFSERVICEmedia.audio_flinger:
 DUMPOFSERVICEmedia.audio_policy:
 DUMPOFSERVICEmedia.camera:
 DUMPOFSERVICEmedia.player:
 DUMPOFSERVICEmeminfo:
 DUMPOFSERVICEmotion_recognition:
 DUMPOFSERVICEmount:
 DUMPOFSERVICEmultiwindow:
 DUMPOFSERVICEnetpolicy:
 DUMPOFSERVICEnetstats:
 DUMPOFSERVICEnetwork_management:
 DUMPOFSERVICEnfc:
 DUMPOFSERVICEnfccontroller:
 DUMPOFSERVICEnotification:
 DUMPOFSERVICEpackage:
 DUMPOFSERVICEpermission:
 DUMPOFSERVICEphone:
 DUMPOFSERVICEphone_restriction_policy:
 DUMPOFSERVICEphoneext:
 DUMPOFSERVICEpower:
 DUMPOFSERVICEremoteinjection:
 DUMPOFSERVICEsamplingprofiler:
 DUMPOFSERVICEsamsung.smartfaceservice:
 DUMPOFSERVICEscheduling_policy:
 DUMPOFSERVICEsearch:
 DUMPOFSERVICEsec_analytics:
 DUMPOFSERVICEsecontroller:
 DUMPOFSERVICEsensorservice:
 DUMPOFSERVICEserial:
 DUMPOFSERVICEservicediscovery:
 DUMPOFSERVICEsimphonebook:
 DUMPOFSERVICEsip:
 DUMPOFSERVICEstatusbar:
 DUMPOFSERVICEtelephony.registry:
 DUMPOFSERVICEtextservices:
 DUMPOFSERVICEtvoutservice:
 DUMPOFSERVICEuimode:
 DUMPOFSERVICEupdatelock:
 DUMPOFSERVICEusagestats:
 DUMPOFSERVICEusb:
 DUMPOFSERVICEuser:
 DUMPOFSERVICEvibrator:
 DUMPOFSERVICEvoip:
 DUMPOFSERVICEwallpaper:
 DUMPOFSERVICEwfd:
 DUMPOFSERVICEwifi:
 DUMPOFSERVICEwifi_policy:
 DUMPOFSERVICEwifip2p:
 DUMPOFSERVICEwindow:

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：

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shell@m:/$dumpsysmeminfo-h dumpsysmeminfo-h
 meminfodumpoptions:[-a][--oom][process]
 -a:includeallavailableinformationforeachprocess.
 --oom:onlyshowprocessesorganizedbyoomadj.
 If[process]isspecifieditcanbethenameor
 pidofaspecificprocesstodump.

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

window - 通过adb shell dumpsys命令获取当前应用的component

statusbar - 找出广告通知属于哪个应用

dumpsys statusbar | grep notification=Notification

四、参考资料

Dumpsys（官方文档）
How to discover memory usage of my application in Android
@L_301_14@（代码分析）

更多优化相关的文章详见：《 Android 基础学习文章汇总》第三部分性能优化

dumpsys的使用

一、列出dumpsys所有支持命令

二、具体命令如何查看帮助

三、一些关键命令解释

四、参考资料

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