dumpsys可以用来查看android系统运行过程中的信息状态，如CPU、内存使用....

例1：查看dumpsys的“子命令”

adbshell dumpsys | grep "DUMP OF SERVICE"

output:

DUMP OF SERVICE SurfaceFlinger:

DUMP OF SERVICE accessibility:

DUMP OF SERVICE account:

DUMP OF SERVICE activity:

DUMP OF SERVICE alarm:

DUMP OF SERVICE appwidget:

DUMP OF SERVICE audio:

DUMP OF SERVICE backup:

DUMP OF SERVICE battery:

DUMP OF SERVICE batteryinfo:

DUMP OF SERVICE clipboard:

DUMP OF SERVICE connectivity:

DUMP OF SERVICE content:

DUMP OF SERVICE cpuinfo:

DUMP OF SERVICE device_policy:

DUMP OF SERVICE devicestoragemonitor:

DUMP OF SERVICE diskstats:

DUMP OF SERVICE dropbox:

DUMP OF SERVICE entropy:

DUMP OF SERVICE hardware:

DUMP OF SERVICE input_method:

DUMP OF SERVICE iphonesubinfo:

DUMP OF SERVICE isms:

DUMP OF SERVICE location:

DUMP OF SERVICE media.audio_flinger:

DUMP OF SERVICE media.audio_policy:

DUMP OF SERVICE media.player:

DUMP OF SERVICE meminfo:

DUMP OF SERVICE mount:

DUMP OF SERVICE netstat:

DUMP OF SERVICE network_management:

DUMP OF SERVICE notification:

DUMP OF SERVICE package:

DUMP OF SERVICE permission:

DUMP OF SERVICE phone:

DUMP OF SERVICE power:

DUMP OF SERVICE reboot:

DUMP OF SERVICE screenshot:

DUMP OF SERVICE search:

DUMP OF SERVICE sensor:

DUMP OF SERVICE simphonebook:

DUMP OF SERVICE statusbar:

DUMP OF SERVICE telephony.registry:

DUMP OF SERVICE throttle:

DUMP OF SERVICE usagestats:

DUMP OF SERVICE vibrator:

DUMP OF SERVICE wallpaper:

DUMP OF SERVICE wifi:

DUMP OF SERVICE window:

注：在非“posix”类操作系统中，可使用findstr代替grep

例2：查看cpu信息：

adb shell dumpsys cpuinfo

例3：查看程序的内存使用情况：

adb shell dumpsys meminfo $package_name or $pid    //使用程序的包名或者进程id

e.g. adb shell dumpsys meminfo com.google.android.apps.maps

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