查看 activity 栈的状态： adb shell dumpsys activity
Android has an interesting command called dumpsys to dump some system information.
Even described on adb manual I think that some points should be reinforced. In order
to get the complete status just run (will produce a large output):
adb shell dumpsys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
adb shell dumpsys activity 显示activity相关的信息
adb shell dumpsys statusbar 显示状态栏相关的信息
adb shell dumpsys meminfo $package_name or $pid 使用程序的包名或者进程id显示内存信息
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
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：
1 SurfaceFlinger
2 accessibility
3 account
4 activity
5 alarm
6 appwidget
7 audio
8 backup
9 battery
10 batteryinfo
11 bluetooth
12 bluetooth_a2dp
13 clipboard
14 connectivity
15 content
16 cpuinfo
17 device_policy
18 devicestoragemonitor
19 diskstats
20 dropbox
21 entropy
22 ethernet
23 hardware
24 input_method
25 iphonesubinfo
26 isms
27 keybar
28 location
29 media.audio_flinger
30 media.audio_policy
31 media.camera
32 media.player
33 meminfo
34 mount
35 netstat
36 network_management
37 notification
38 package
39 permission
40 phone
41 power
42 search
43 sensorservice
44 simphonebook
45 statusbar
46 telephony.registry
47 throttle
48 uimode
49 usagestats
50 vibrator
51 wallpaper
52 wifi
53 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查看Android手机的Activtiy堆栈顶部的应用包名
方法1：
C:\Users\beijing_zbs> adb shell dumpsys activity|findstr top-activity
Proc # 0: fore F/A/T trm: 0 4203:com.tencent.news/u0a101 (top-activity)方法2：
C:\Users\beijing_zbs> adb shell dumpsys activity|findstr mFocusedActivity
mFocusedActivity: ActivityRecord{437904d0 u0 com.tencent.news/.ui.MainActivity2 t2}查看Android手机分辨率的方法：
C:\Users\beijing_zbs>adb shell dumpsys window|findstr mOverscanScreen
mOverscanScreen=(0,0) 1536x2560
C:\Users\beijing_zbs>adb shell dumpsys window|findstr mOverscanScreen
mOverscanScreen=(0,0) 1080x1920查看Android手机分辨率的通用方法(适用于android4.0以上)：
C:\Users\beijing_zbs>adb shell dumpsys window|findstr mUnrestrictedScreen
mUnrestrictedScreen=(0,0) 540x960
#在批处理中拿到该分辨率的值得方法如下：
FOR /f "tokens=3 delims=), " %%a in ('adb shell dumpsys window^|findstr mUnrestrictedScreen') do SET resolutionratio=%%a
ECHO The Android Phone Displayed Ratio: %resolutionratio%查看Android手机分辨率的方法(适用于android4.3以上)：
C:\Users\beijing_zbs>adb shell wm size
Physical size: 1080x1920来源：oschina
链接：https://my.oschina.net/u/199776/blog/380484