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该命令用于打印出当前系统信息，默认打印出设备中所有service的信息，可以在命令后面加指定的service name.

有两种方法可以查看service list:

1. adb shell dumpsys

输出信息的开始部分就是所有运行的service，如下：

Currently running services:

SurfaceFlinger:

accessibility: account: activity: alarm: appwidget: audio: backup: battery: batteryinfo: clipboard: connectivity: content: cpuinfo: device_policy: devicestoragemonitor: diskstats: dropbox: entropy: hardware: input_method: iphonesubinfo: isms: location: media.audio_flinger: media.audio_policy: media.camera: media.player: meminfo: mount: netstat: network_management: notification: package: permission: phone: power: search: sensorservice: simphonebook: statusbar: telephony.registry: throttle: uimode: usagestats: vibrator: wallpaper: wifi: window:

2. adb shell service list

输出结果如下：

Found 49 services:

0 phone: [com.android.internal.telephony.ITelephony] 1 iphonesubinfo: [com.android.internal.telephony.IPhoneSubInfo] 2 simphonebook: [com.android.internal.telephony.IIccPhoneBook] 3 isms: [com.android.internal.telephony.ISms] 4 diskstats: [] 5 appwidget: [com.android.internal.appwidget.IAppWidgetService] 6 backup: [android.app.backup.IBackupManager] 7 uimode: [android.app.IUiModeManager] 8 audio: [android.media.IAudioService] 9 wallpaper: [android.app.IWallpaperManager] 10 dropbox: [com.android.internal.os.IDropBoxManagerService] 11 search: [android.app.ISearchManager] 12 location: [android.location.ILocationManager] 13 devicestoragemonitor: [] 14 notification: [android.app.INotificationManager] 15 mount: [IMountService] 16 accessibility: [android.view.accessibility.IAccessibilityManager] 17 throttle: [android.net.IThrottleManager] 18 connectivity: [android.net.IConnectivityManager] 19 wifi: [android.net.wifi.IWifiManager] 20 network_management: [android.os.INetworkManagementService] 21 netstat: [android.os.INetStatService] 22 input_method: [com.android.internal.view.IInputMethodManager] 23 clipboard: [android.text.IClipboard] 24 statusbar: [com.android.internal.statusbar.IStatusBarService] 25 device_policy: [android.app.admin.IDevicePolicyManager] 26 window: [android.view.IWindowManager] 27 alarm: [android.app.IAlarmManager] 28 vibrator: [android.os.IVibratorService] 29 hardware: [android.os.IHardwareService] 30 battery: [] 31 content: [android.content.IContentService] 32 account: [android.accounts.IAccountManager] 33 permission: [android.os.IPermissionController] 34 cpuinfo: [] 35 meminfo: [] 36 activity: [android.app.IActivityManager] 37 package: [android.content.pm.IPackageManager] 38 telephony.registry: [com.android.internal.telephony.ITelephonyRegistry] 39 usagestats: [com.android.internal.app.IUsageStats] 40 batteryinfo: [com.android.internal.app.IBatteryStats] 41 power: [android.os.IPowerManager] 42 entropy: [] 43 sensorservice: [android.gui.SensorServer] 44 SurfaceFlinger: [android.ui.ISurfaceComposer] 45 media.audio_policy: [android.media.IAudioPolicyService] 46 media.camera: [android.hardware.ICameraService] 47 media.player: [android.media.IMediaPlayerService] 48 media.audio_flinger: [android.media.IAudioFlinger]

查询到运行的system service后，就可以在dumpsys后面加上service的名字，查看指定的service信息。

adb shell dumpsys activity

adb shell dumpsys cpuinfo

adb shell dumpsys battery

adb shell dumpsys window（最后部分可以看到分辨率的信息）

有些service能够接收额外的参数，我们可以使用-h查看帮助信息。

adb shell dumpsys package -h

adb shell dumpsys activity -h

本文转载自：https://blog.csdn.net/g19920917/article/details/38032413#commentBox