在分析Android問題的時候重要的手段之一就是分析log，在events.log中有很多系統log，其中有些log的含義並不是很瞭解，下麵就是從安卓源碼中得到的系統log的tag。 關於Tag的說明如下：以 “30005 am_create_activity (User|1|5),(Token|1 ...
在分析Android問題的時候重要的手段之一就是分析log，在events.log中有很多系統log，其中有些log的含義並不是很瞭解，下麵就是從安卓源碼中得到的系統log的tag。
關於Tag的說明如下：以 “30005 am_create_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Action|3),(MIME Type|3),(URI|3),(Flags|1|5)” 為例，
其中：
- 30005 ：相當於是am_create_activity這個tag的索引或者標識。不會出現在events.txt中。
- am_create_activity：TAG名字
- 後面用()括起來的相當於是這個log的一些信息，以(User|1|5)為例，User表示信息名字，User表示UID，1表示在列印出的log中該信息的數據類型，5表示該數據的單位。
數據類型有：
- 1：int
- 2：long
- 3：string
- 4：list
- 5：float
數據的單位有：
- 1：Number of objects
- 2：Number of bytes
- 3：Number of milliseconds
- 4：Number of allocations
- 5：Id
- 6：Percent
所以(User|1|5)表示的意思是：這項信息表示的是User，在Linux即相當於UID，信息的數據類型為1，即int，數據的單位為5，即Id。其他的類似。
一個實際的log如下：
10-31 17:53:38.288 1232 2211 I am_create_activity: [0,208381599,127,cn.company.photoeditor/com.android.gallery3d.filtershow.FilterShowActivity,android.intent.action.EDIT,image/*,content://media/external/images/media/4427,1]，表示的含義即為：
- 這是一個表示activity創建的log
- 程式的UID為0
- 要創建的該activity的TOKEN為208381599
- 該動作所處的Task ID為127
- 所要創建的activity組件名為 cn.company.photoeditor/com.android.gallery3d.filtershow.FilterShowActivity
- 創建該activity消息中的action為android.intent.action.EDIT，MIME TYPE為image/*，URI為content://media/external/images/media/4427，附帶的flag為1
下麵是源碼的中tag定義文件：
service/core/java/com/android/server/am/EventLogTags.logtags：
# See system/core/logcat/event.logtags for a description of the format of this file. option java_package com.android.server.am 2719 configuration_changed (config mask|1|5) 2721 cpu (total|1|6),(user|1|6),(system|1|6),(iowait|1|6),(irq|1|6),(softirq|1|6) # ActivityManagerService.systemReady() starts: 3040 boot_progress_ams_ready (time|2|3) # ActivityManagerService calls enableScreenAfterBoot(): 3050 boot_progress_enable_screen (time|2|3) # Do not change these names without updating the checkin_events setting in # google3/googledata/wireless/android/provisioning/gservices.config !! # # An activity is being finished: 30001 am_finish_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Reason|3) # A task is being brought to the front of the screen: 30002 am_task_to_front (User|1|5),(Task|1|5) # An existing activity is being given a new intent: 30003 am_new_intent (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Action|3),(MIME Type|3),(URI|3),(Flags|1|5) # A new task is being created: 30004 am_create_task (User|1|5),(Task ID|1|5) # A new activity is being created in an existing task: 30005 am_create_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Action|3),(MIME Type|3),(URI|3),(Flags|1|5) # An activity has been resumed into the foreground but was not already running: 30006 am_restart_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3) # An activity has been resumed and is now in the foreground: 30007 am_resume_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3) # Application Not Responding 30008 am_anr (User|1|5),(pid|1|5),(Package Name|3),(Flags|1|5),(reason|3) # Activity launch time 30009 am_activity_launch_time (User|1|5),(Token|1|5),(Component Name|3),(time|2|3) # Application process bound to work 30010 am_proc_bound (User|1|5),(PID|1|5),(Process Name|3) # Application process died 30011 am_proc_died (User|1|5),(PID|1|5),(Process Name|3) # The Activity Manager failed to pause the given activity. 30012 am_failed_to_pause (User|1|5),(Token|1|5),(Wanting to pause|3),(Currently pausing|3) # Attempting to pause the current activity 30013 am_pause_activity (User|1|5),(Token|1|5),(Component Name|3) # Application process has been started 30014 am_proc_start (User|1|5),(PID|1|5),(UID|1|5),(Process Name|3),(Type|3),(Component|3) # An application process has been marked as bad 30015 am_proc_bad (User|1|5),(UID|1|5),(Process Name|3) # An application process that was bad is now marked as good 30016 am_proc_good (User|1|5),(UID|1|5),(Process Name|3) # Reporting to applications that memory is low 30017 am_low_memory (Num Processes|1|1) # An activity is being destroyed: 30018 am_destroy_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Reason|3) # An activity has been relaunched, resumed, and is now in the foreground: 30019 am_relaunch_resume_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3) # An activity has been relaunched: 30020 am_relaunch_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3) # The activity's onPause has been called. 30021 am_on_paused_called (User|1|5),(Component Name|3),(Reason|3) # The activity's onResume has been called. 30022 am_on_resume_called (User|1|5),(Component Name|3),(Reason|3) # Kill a process to reclaim memory. 30023 am_kill (User|1|5),(PID|1|5),(Process Name|3),(OomAdj|1|5),(Reason|3) # Discard an undelivered serialized broadcast (timeout/ANR/crash) 30024 am_broadcast_discard_filter (User|1|5),(Broadcast|1|5),(Action|3),(Receiver Number|1|1),(BroadcastFilter|1|5) 30025 am_broadcast_discard_app (User|1|5),(Broadcast|1|5),(Action|3),(Receiver Number|1|1),(App|3) # A service is being created 30030 am_create_service (User|1|5),(Service Record|1|5),(Name|3),(UID|1|5),(PID|1|5) # A service is being destroyed 30031 am_destroy_service (User|1|5),(Service Record|1|5),(PID|1|5) # A process has crashed too many times, it is being cleared 30032 am_process_crashed_too_much (User|1|5),(Name|3),(PID|1|5) # An unknown process is trying to attach to the activity manager 30033 am_drop_process (PID|1|5) # A service has crashed too many times, it is being stopped 30034 am_service_crashed_too_much (User|1|5),(Crash Count|1|1),(Component Name|3),(PID|1|5) # A service is going to be restarted after its process went away 30035 am_schedule_service_restart (User|1|5),(Component Name|3),(Time|2|3) # A client was waiting for a content provider, but its process was lost 30036 am_provider_lost_process (User|1|5),(Package Name|3),(UID|1|5),(Name|3) # The activity manager gave up on a new process taking too long to start 30037 am_process_start_timeout (User|1|5),(PID|1|5),(UID|1|5),(Process Name|3) # Unhandled exception 30039 am_crash (User|1|5),(PID|1|5),(Process Name|3),(Flags|1|5),(Exception|3),(Message|3),(File|3),(Line|1|5) # Log.wtf() called 30040 am_wtf (User|1|5),(PID|1|5),(Process Name|3),(Flags|1|5),(Tag|3),(Message|3) # User switched 30041 am_switch_user (id|1|5) # Activity fully drawn time 30042 am_activity_fully_drawn_time (User|1|5),(Token|1|5),(Component Name|3),(time|2|3) # Activity focused 30043 am_focused_activity (User|1|5),(Component Name|3),(Reason|3) # Stack focus 30044 am_focused_stack (User|1|5),(Focused Stack Id|1|5),(Last Focused Stack Id|1|5),(Reason|3) # Running pre boot receiver 30045 am_pre_boot (User|1|5),(Package|3) # Report collection of global memory state 30046 am_meminfo (Cached|2|2),(Free|2|2),(Zram|2|2),(Kernel|2|2),(Native|2|2) # Report collection of memory used by a process 30047 am_pss (Pid|1|5),(UID|1|5),(Process Name|3),(Pss|2|2),(Uss|2|2),(SwapPss|2|2) # Attempting to stop an activity 30048 am_stop_activity (User|1|5),(Token|1|5),(Component Name|3) # The activity's onStop has been called. 30049 am_on_stop_called (User|1|5),(Component Name|3),(Reason|3) # Report changing memory conditions (Values are ProcessStats.ADJ_MEM_FACTOR* constants) 30050 am_mem_factor (Current|1|5),(Previous|1|5)
services/core/java/com/android/server/EventLogTags.logtags：
# See system/core/logcat/event.logtags for a description of the format of this file. option java_package com.android.server # --------------------------- # BatteryService.java # --------------------------- 2722 battery_level (level|1|6),(voltage|1|1),(temperature|1|1) 2723 battery_status (status|1|5),(health|1|5),(present|1|5),(plugged|1|5),(technology|3) # This is logged when battery goes from discharging to charging. # It lets us count the total amount of time between charges and the discharge level 2730 battery_discharge (duration|2|3),(minLevel|1|6),(maxLevel|1|6) # --------------------------- # PowerManagerService.java # --------------------------- # This is logged when the device is being forced to sleep (typically by # the user pressing the power button). 2724 power_sleep_requested (wakeLocksCleared|1|1) # This is logged when the screen on broadcast has completed 2725 power_screen_broadcast_send (wakelockCount|1|1) # This is logged when the screen broadcast has completed 2726 power_screen_broadcast_done (on|1|5),(broadcastDuration|2|3),(wakelockCount|1|1) # This is logged when the screen on broadcast has completed 2727 power_screen_broadcast_stop (which|1|5),(wakelockCount|1|1) # This is logged when the screen is turned on or off. 2728 power_screen_state (offOrOn|1|5),(becauseOfUser|1|5),(totalTouchDownTime|2|3),(touchCycles|1|1) # This is logged when the partial wake lock (keeping the device awake # regardless of whether the screen is off) is acquired or released. 2729 power_partial_wake_state (releasedorAcquired|1|5),(tag|3) # The device is being asked to go into a soft sleep (typically by the ungaze gesture). # It logs the time remaining before the device would've normally gone to sleep without the request. 2731 power_soft_sleep_requested (savedwaketimems|2) # # Leave IDs through 2739 for more power logs (2730 used by battery_discharge above) # # --------------------------- # DeviceStorageMonitorService.java # --------------------------- # The disk space free on the /data partition, in bytes 2744 free_storage_changed (data|2|2) # Device low memory notification and disk space free on the /data partition, in bytes at that time 2745 low_storage (data|2|2) # disk space free on the /data, /system, and /cache partitions in bytes 2746 free_storage_left (data|2|2),(system|2|2),(cache|2|2) # file on cache partition was deleted 2748 cache_file_deleted (path|3) # --------------------------- # NotificationManagerService.java # --------------------------- # when a NotificationManager.notify is called. status: 0=post, 1=update, 2=ignored 2750 notification_enqueue (uid|1|5),(pid|1|5),(pkg|3),(id|1|5),(tag|3),(userid|1|5),(notification|3),(status|1) # when someone tries to cancel a notification, the notification manager sometimes # calls this with flags too 2751 notification_cancel (uid|1|5),(pid|1|5),(pkg|3),(id|1|5),(tag|3),(userid|1|5),(required_flags|1),(forbidden_flags|1),(reason|1|5),(listener|3) # when someone tries to cancel all of the notifications for a particular package 2752 notification_cancel_all (uid|1|5),(pid|1|5),(pkg|3),(userid|1|5),(required_flags|1),(forbidden_flags|1),(reason|1|5),(listener|3) # when the notification panel is shown # Note: New tag range starts here since 2753+ have been used below. 27500 notification_panel_revealed (items|1) # when the notification panel is hidden 27501 notification_panel_hidden # when notifications are newly displayed on screen, or disappear from screen 27510 notification_visibility_changed (newlyVisibleKeys|3),(noLongerVisibleKeys|3) # when notifications are expanded, or contracted 27511 notification_expansion (key|3),(user_action|1),(expanded|1),(lifespan|1),(freshness|1),(exposure|1) # when a notification has been clicked 27520 notification_clicked (key|3),(lifespan|1),(freshness|1),(exposure|1) # when a notification action button has been clicked 27521 notification_action_clicked (key|3),(action_index|1),(lifespan|1),(freshness|1),(exposure|1) # when a notification has been canceled 27530 notification_canceled (key|3),(reason|1),(lifespan|1),(freshness|1),(exposure|1) # replaces 27510 with a row per notification 27531 notification_visibility (key|3),(visibile|1),(lifespan|1),(freshness|1),(exposure|1),(rank|1) # a notification emited noise, vibration, or light 27532 notification_alert (key|3),(buzz|1),(beep|1),(blink|1) # a notification was added to a autogroup 27533 notification_autogrouped (key|3) # notification was removed from an autogroup 275534 notification_unautogrouped (key|3) # --------------------------- # Watchdog.java # --------------------------- 2802 watchdog (Service|3) 2803 watchdog_proc_pss (Process|3),(Pid|1|5),(Pss|1|2) 2804 watchdog_soft_reset (Process|3),(Pid|1|5),(MaxPss|1|2),(Pss|1|2),(Skip|3) 2805 watchdog_hard_reset (Process|3),(Pid|1|5),(MaxPss|1|2),(Pss|1|2) 2806 watchdog_pss_stats (EmptyPss|1|2),(EmptyCount|1|1),(BackgroundPss|1|2),(BackgroundCount|1|1),(ServicePss|1|2),(ServiceCount|1|1),(VisiblePss|1|2),(VisibleCount|1|1),(ForegroundPss|1|2),(ForegroundCount|1|1),(NoPssCount|1|1) 2807 watchdog_proc_stats (DeathsInOne|1|1),(DeathsInTwo|1|1),(DeathsInThree|1|1),(DeathsInFour|1|1),(DeathsInFive|1|1) 2808 watchdog_scheduled_reboot (Now|2|1),(Interval|1|3),(StartTime|1|3),(Window|1|3),(Skip|3) 2809 watchdog_meminfo (MemFree|1|2),(Buffers|1|2),(Cached|1|2),(Active|1|2),(Inactive|1|2),(AnonPages|1|2),(Mapped|1|2),(Slab|1|2),(SReclaimable|1|2),(SUnreclaim|1|2),(PageTables|1|2) 2810 watchdog_vmstat (runtime|2|3),(pgfree|1|1),(pgactivate|1|1),(pgdeactivate|1|1),(pgfault|1|1),(pgmajfault|1|1) 2811 watchdog_requested_reboot (NoWait|1|1),(ScheduleInterval|1|3),(RecheckInterval|1|3),(StartTime|1|3),(Window|1|3),(MinScreenOff|1|3),(MinNextAlarm|1|3) # --------------------------- # BackupManagerService.java # --------------------------- 2820 backup_data_changed (Package|3) 2821 backup_start (Transport|3) 2822 backup_transport_failure (Package|3) 2823 backup_agent_failure (Package|3),(Message|3) 2824 backup_package (Package|3),(Size|1|2) 2825 backup_success (Packages|1|1),(Time|1|3) 2826 backup_reset (Transport|3) 2827 backup_initialize 2828 backup_requested (Total|1|1),(Key-Value|1|1),(Full|1|1) 2829 backup_quota_exceeded (Package|3) 2830 restore_start (Transport|3),(Source|2|5) 2831 restore_transport_failure 2832 restore_agent_failure (Package|3),(Message|3) 2833 restore_package (Package|3),(Size|1|2) 2834 restore_success (Packages|1|1),(Time|1|3) 2840 full_backup_package (Package|3) 2841 full_backup_agent_failure (Package|3),(Message|3) 2842 full_backup_transport_failure 2843 full_backup_success (Package|3) 2844 full_restore_package (Package|3) 2845 full_backup_quota_exceeded (Package|3) 2850 backup_transport_lifecycle (Transport|3),(Bound|1|1) # --------------------------- # SystemServer.java # --------------------------- # SystemServer.run() starts: 3010 boot_progress_system_run (time|2|3) # --------------------------- # PackageManagerService.java # --------------------------- # Package Manager starts: 3060 boot_progress_pms_start (time|2|3) # Package Manager .apk scan starts: 3070 boot_progress_pms_system_scan_start (time|2|3) # Package Manager .apk scan starts: 3080 boot_progress_pms_data_scan_start (time|2|3) # Package Manager .apk scan ends: 3090 boot_progress_pms_scan_end (time|2|3) # Package Manager ready: 3100 boot_progress_pms_ready (time|2|3) # + check activity_launch_time for Home app # Value of "unknown sources" setting at app install time 3110 unknown_sources_enabled (value|1) # Package Manager critical info 3120 pm_critical_info (msg|3) # --------------------------- # WindowManagerService.java # --------------------------- # Out of memory for surfaces. 31000 wm_no_surface_memory (Window|3),(PID|1|5),(Operation|3) # Task created. 31001 wm_task_created (TaskId|1|5),(StackId|1|5) # Task moved to top (1) or bottom (0). 31002 wm_task_moved (TaskId|1|5),(ToTop|1),(Index|1) # Task removed with source explanation. 31003 wm_task_removed (TaskId|1|5),(Reason|3) # Stack created. 31004 wm_stack_created (StackId|1|5) # Home stack moved to top (1) or bottom (0). 31005 wm_home_stack_moved (ToTop|1) # Stack removed. 31006 wm_stack_removed (StackId|1|5) # bootanim finished: 31007 wm_boot_animation_done (time|2|3) # --------------------------- # InputMethodManagerService.java # --------------------------- # Re-connecting to input method service because we haven't received its interface 32000 imf_force_reconnect_ime (IME|4),(Time Since Connect|2|3),(Showing|1|1) # --------------------------- # WallpaperManagerService.java # --------------------------- 33000 wp_wallpaper_crashed (component|3) # --------------------------- # Device idle # --------------------------- 34000 device_idle (state|1|5), (reason|3) 34001 device_idle_step 34002 device_idle_wake_from_idle (is_idle|1|5), (reason|3) 34003 device_idle_on_start 34004 device_idle_on_phase (what|3) 34005 device_idle_on_complete 34006 device_idle_off_start (reason|3) 34007 device_idle_off_phase (what|3) 34008 device_idle_off_complete 34009 device_idle_light (state|1|5), (reason|3) 34010 device_idle_light_step # --------------------------- # DisplayManagerService.java # --------------------------- # Auto-brightness adjustments by the user. 35000 auto_brightness_adj (old_adj|5),(old_lux|5),(old_brightness|5),(old_gamma|5),(new_adj|5),(new_lux|5),(new_brightness|5),(new_gamma|5) # --------------------------- # ConnectivityService.java # --------------------------- # Connectivity state changed 50020 connectivity_state_changed (type|1),(subtype|1),(state|1) # --------------------------- # NetworkStatsService.java # --------------------------- 51100 netstats_mobile_sample (dev_rx_bytes|2|2),(dev_tx_bytes|2|2),(dev_rx_pkts|2|1),(dev_tx_pkts|2|1),(xt_rx_bytes|2|2),(xt_tx_bytes|2|2),(xt_rx_pkts|2|1),(xt_tx_pkts|2|1),(uid_rx_bytes|2|2),(uid_tx_bytes|2|2),(uid_rx_pkts|2|1),(uid_tx_pkts|2|1),(trusted_time|2|3) 51101 netstats_wifi_sample (dev_rx_bytes|2|2),(dev_tx_bytes|2|2),(dev_rx_pkts|2|1),(dev_tx_pkts|2|1),(xt_rx_bytes|2|2),(xt_tx_bytes|2|2),(xt_rx_pkts|2|1),(xt_tx_pkts|2|1),(uid_rx_bytes|2|2),(uid_tx_bytes|2|2),(uid_rx_pkts|2|1),(uid_tx_pkts|2|1),(trusted_time|2|3) # --------------------------- # LockdownVpnTracker.java # --------------------------- 51200 lockdown_vpn_connecting (egress_net|1) 51201 lockdown_vpn_connected (egress_net|1) 51202 lockdown_vpn_error (egress_net|1) # --------------------------- # ConfigUpdateInstallReceiver.java # --------------------------- 51300 config_install_failed (dir|3) # --------------------------- # IntentFirewall.java # --------------------------- 51400 ifw_intent_matched (Intent Type|1|5),(Component Name|3),(Caller Uid|1|5),(Caller Pkg Count|1|1),(Caller Pkgs|3),(Action|3),(MIME Type|3),(URI|3),(Flags|1|5) # --------------------------- # IdleMaintenanceService.java # --------------------------- 51500 idle_maintenance_window_start (time|2|3), (lastUserActivity|2|3), (batteryLevel|1|6), (batteryCharging|1|5) 51501 idle_maintenance_window_finish (time|2|3), (lastUserActivity|2|3), (batteryLevel|1|6), (batteryCharging|1|5) # --------------------------- # MountService.java # --------------------------- 2755 fstrim_start (time|2|3) 2756 fstrim_finish (time|2|3) # --------------------------- # AudioService.java # --------------------------- 40000 volume_changed (stream|1), (prev_level|1), (level|1), (max_level|1), (caller|3) 40001 stream_devices_changed (stream|1), (prev_devices|1), (devices|1) # --------------------------- # GestureLauncherService.java # --------------------------- 40100 camera_gesture_triggered (gesture_on_time|2|3), (sensor1_on_time|2|3), (sensor2_on_time|2|3), (event_extra|1|1)
