【Android 应用开发】Android开发使用 adb logcat 显示 Android 日志

eclipse 自带的 LogCat 工具太垃圾了, 开始用 adb logcat 在终端查看日志;

1. 解析 adb logcat 的帮助信息

在命令行中输入 adb logcat --help 命令, 就可以显示该命令的帮助信息;

octopus@octopus:~$ adb logcat --help
Usage: logcat [options] [filterspecs]
options include:
  -s              Set default filter to silent.
                  Like specifying filterspec '*:s'
  -f <filename>   Log to file. Default to stdout
  -r [<kbytes>]   Rotate log every kbytes. (16 if unspecified). Requires -f
  -n <count>      Sets max number of rotated logs to <count>, default 4
  -v <format>     Sets the log print format, where <format> is one of:

                  brief process tag thread raw time threadtime long

  -c              clear (flush) the entire log and exit
  -d              dump the log and then exit (don't block)
  -t <count>      print only the most recent <count> lines (implies -d)
  -g              get the size of the log's ring buffer and exit
  -b <buffer>     Request alternate ring buffer, 'main', 'system', 'radio'
                  or 'events'. Multiple -b parameters are allowed and the
                  results are interleaved. The default is -b main -b system.
  -B              output the log in binary
filterspecs are a series of
  <tag>[:priority]

where <tag> is a log component tag (or * for all) and priority is:
  V    Verbose
  D    Debug
  I    Info
  W    Warn
  E    Error
  F    Fatal
  S    Silent (supress all output)

'*' means '*:d' and <tag> by itself means <tag>:v

If not specified on the commandline, filterspec is set from ANDROID_LOG_TAGS.
If no filterspec is found, filter defaults to '*:I'

If not specified with -v, format is set from ANDROID_PRINTF_LOG
or defaults to "brief"

adb logcat 命令格式 : adb logcat [选项] [过滤项], 其中选项和过滤项在中括号 [] 中, 说明这是可选的;

(1) 选项解析

选项解析 :

-- "-s"选项 : 设置输出日志的标签, 只显示该标签的日志;

-- "-f"选项 : 将日志输出到文件, 默认输出到标准输出流中, -f 参数执行不成功;

-- "-r"选项 : 按照每千字节输出日志, 需要 -f 参数, 不过这个命令没有执行成功;

-- "-n"选项 : 设置日志输出的最大数目, 需要 -r 参数, 这个执行感觉跟 adb logcat 效果一样;

-- "-v"选项 : 设置日志的输出格式, 注意只能设置一项;

-- "-c"选项 : 清空所有的日志缓存信息;

-- "-d"选项 : 将缓存的日志输出到屏幕上, 并且不会阻塞;

-- "-t"选项 : 输出最近的几行日志, 输出完退出, 不阻塞;

-- "-g"选项 : 查看日志缓冲区信息;

-- "-b"选项 : 加载一个日志缓冲区, 默认是 main, 下面详解;

-- "-B"选项 : 以二进制形式输出日志;

输出指定标签内容 :

-- "-s"选项 : 设置默认的过滤器, 如我们想要输出 "System.out" 标签的信息, 就可以使用 adb logcat -s System.out 命令;

octopus@octopus:~$ adb logcat -s System.out
--------- beginning of /dev/log/system
--------- beginning of /dev/log/main
I/System.out(22930): GSM -91
I/System.out(22930): SignalStrength issssssssss : -91
I/System.out(22930): GSM -91
I/System.out(22930): SignalStrength issssssssss : -91
I/System.out(22930): Supervisor Thread
I/System.out(22930): Got run mode

输出日志信息到文件 :

-- "-f"选项 : 该选向后面跟着输入日志的文件, 使用 adb logcat -f log 命令, 会出现错误, 这里我们不推荐使用该选项;

octopus@octopus:~$ adb logcat -f log
couldn't open output file: Read-only file system

-- ">"输出 : ">" 后面跟着要输出的日志文件, 可以将 logcat 日志输出到文件中, 使用 adb logcat > log 命令, 使用 more log 命令查看日志信息;

octopus@octopus:~$ adb logcat > log
^C
octopus@octopus:~$ more log
--------- beginning of /dev/log/system
V/ActivityManager(  500): We have pending thumbnails: null
V/ActivityManager(  500): getTasks: max=1, flags=0, receiver=null
V/ActivityManager(  500): com.android.settings/.Settings: task=TaskRecord{42392278 #448 A com.android.settings U 0}
V/ActivityManager(  500): We have pending thumbnails: null

指定 logcat 的日志输出格式 :

-- "-v"选项 : 使用 adb logcat -v time 命令, 可以啥看日志的输出时间;

-- "brief"格式 : 这是默认的日志格式 " 优先级 / 标签 (进程ID) : 日志信息 ", 使用 adb logcat -v prief 命令;

octopus@octopus:~$ adb logcat -v brief
--------- beginning of /dev/log/system
D/PowerManagerService(  500): handleSandman: canDream=true, mWakefulness=Awake
D/PowerManagerService(  500): releaseWakeLockInternal: lock=1101267696, flags=0x0

-- "process"格式 : " 优先级 (进程ID) : 日志信息 ", 使用 adb logcat -v process 命令;

octopus@octopus:~$ adb logcat -v process
--------- beginning of /dev/log/system
D(  500) MobileDataStateReceiver received: ACTION_ANY_DATA_CONNECTION_STATE_CHANGED_MOBILE [wap]  (MobileDataStateTracker)
V(  500) Broadcast: Intent { act=android.intent.action.ANY_DATA_STATE_MOBILE flg=0x10 (has extras) } ordered=true userid=0  (ActivityManager)
D(  500) wap: Intent from SIM 0, current SIM 0, current DataState DISCONNECTED  (MobileDataStateTracker)
D(  500) wap: wap setting isAvailable to false  (MobileDataStateTracker)
D(  500) wap: Received state=DISCONNECTED, old=DISCONNECTED, reason=dataDetached  (MobileDataStateTracker)
D(  500) BDC-Calling finishReceiver: IIntentReceiver=41c46ba0  (ActivityThread)

-- "tag"格式 : " 优先级 / 标签 : 日志信息", 使用 adb logcat -v tag 命令;

octopus@octopus:~$ adb logcat -v tag
--------- beginning of /dev/log/system
I/PowerManagerService: setBrightness mButtonLight 0.
D/PowerManagerService: updateScreenStateLocked: mDisplayReady=true, newScreenState=2, mWakefulness=1, mWakeLockSummary=0x1, mUserActivitySummary=0x1, mBootCompleted=true
D/PowerManagerService: handleSandman: canDream=true, mWakefulness=Awake

-- "thread"格式 : " 优先级 ( 进程ID : 线程ID) 标签 : 日志内容 ", 使用 adb logcat -v tag 命令;

octopus@octopus:~$ adb logcat -v thread
--------- beginning of /dev/log/system
V(  500: 2141) getTasks: max=1, flags=0, receiver=null
V(  500: 2141) com.lewa.launcher/.Launcher: task=TaskRecord{41dccc20 #425 A com.lewa.launcher U 0}
V(  500: 2141) We have pending thumbnails: null
V(  500: 2140) getTasks: max=1, flags=0, receiver=null

-- "raw"格式 : 只输出日志信息, 不附加任何其他信息, 如优先级标签等, 使用 adb logcat -v raw 命令;

octopus@octopus:~$ adb logcat -v raw
--------- beginning of /dev/log/system
notifications are enabled for com.kindroid.security
Assigned score=0 to Notification(pri=0 contentView=com.kindroid.security/0x7f030052 vibrate=null sound=null defaults=0x0 flags=0x2 kind=[null])
Native set alarm :Alarm{41e1ca00 type 3 com.kindroid.security}
reset poweroff alarm none

-- "time"格式 : "日期时间优先级 / 标签 (进程ID) : 进程名称 : 日志信息 " , 使用 adb logcat -v time 命令;

octopus@octopus:~$ adb logcat -v time
--------- beginning of /dev/log/system
04-25 17:18:13.019 V/ActivityManager(  500): Broadcast sticky: Intent { act=android.intent.action.SIG_STR flg=0x10 (has extras) } ordered=false userid=-1
04-25 17:18:13.157 V/NotificationService(  500): enqueueNotificationInternal: pkg=com.kindroid.security id=1020 notification=Notification(pri=0 contentView=com.kindroid.security/0x7f030052 vibrate=null sound=null defaults=0x0 flags=0x2 kind=[null])
04-25 17:18:13.158 V/NotificationService(  500): notifications are enabled for com.kindroid.security
04-25 17:18:13.158 V/NotificationService(  500): Assigned score=0 to Notification(pri=0 contentView=com.kindroid.security/0x7f030052 vibrate=null sound=null defaults=0x0 flags=0x2 kind=[null])
04-25 17:18:13.555 V/ActivityManager(  500): getTasks: max=1, flags=0, receiver=null

-- "long"格式 : " [ 日期时间进程ID : 线程ID 优先级 / 标签] 日志信息 ", 输出以上提到的所有的头信息, 使用 adb logcat -v long 命令;

octopus@octopus:~$ adb logcat -v long
--------- beginning of /dev/log/system
[ 04-25 17:21:18.118   500:0x2fe V/ActivityManager ]
We have pending thumbnails: null

[ 04-25 17:21:18.696   593:0x251 W/ActivityThread ]
Content provider com.android.providers.telephony.TelephonyProvider already published as telephony

[ 04-25 17:21:19.119   500:0x396 V/ActivityManager ]
getTasks: max=1, flags=0, receiver=null

清空日志缓存信息 : 使用 adb logcat -c 命令, 可以将之前的日志信息清空, 重新开始输出日志信息;

将缓存日志输出 : 使用 adb logcat -d 命令, 输出命令, 之后推出命令, 不会进行阻塞;

输出最近的日志 : 使用 adb logcat -t 5 命令, 可以输出最近的5行日志, 并且不会阻塞;

octopus@octopus:~$ adb logcat -t 5
--------- beginning of /dev/log/system
--------- beginning of /dev/log/main
W/ADB_SERVICES(10028): adb: unable to open /proc/10028/oom_adj
D/dalvikvm(23292): threadid=11: created from interp
D/dalvikvm(23292): start new thread
D/dalvikvm(23292): threadid=11: notify debugger
D/dalvikvm(23292): threadid=11 (Thread-24538): calling run()
octopus@octopus:~$

查看日志缓冲区信息 : 使用 adb logcat -g 命令;

octopus@octopus:~$ adb logcat -g
/dev/log/main: ring buffer is 256Kb (255Kb consumed), max entry is 5120b, max payload is 4076b
/dev/log/system: ring buffer is 256Kb (255Kb consumed), max entry is 5120b, max payload is 4076b
octopus@octopus:~$

加载日志缓冲区 : 使用 adb logcat -b 缓冲区类型 命令;

-- Android中的日志缓冲区 : system缓冲区 - 与系统相关的日志信息, radio缓冲区 - 广播电话相关的日志信息, events缓冲区 - 事件相关的日志信息, main缓冲区 - 默认的缓冲区;

octopus@octopus:~$ adb logcat -b radio -t 5
D/PHONE   (23599): [GeminiDataSubUtil] UAPP_C6-4
D/GSM     (23599): [GDCT][simId1]apnType = default
D/GSM     (23599): [GDCT][simId1]isDataAllowed: not allowed due to - gprs= 1 - SIM not loaded - desiredPowerState= false
D/GSM     (23599): [GDCT][simId1]isDataPossible(default): possible=false isDataAllowed=false apnTypePossible=true apnContextisEnabled=true apnContextState()=IDLE
I/MUXD    (23591): [gsm0710muxd] 3426:main(): Frames received/dropped: 18242/0
octopus@octopus:~$
octopus@octopus:~$ adb logcat -b main -t 5
D/NotificationService(  500): notification.sound=null
D/NotificationService(  500): mDmLock=false
I/ATCIJ   (16576): Couldn't find 'atci-serv-fw' socket; retrying after timeout
W/ADB_SERVICES(  246): create_local_service_socket() name=shell:export ANDROID_LOG_TAGS="" ; exec logcat -b main -t 5
W/ADB_SERVICES(16815): adb: unable to open /proc/16815/oom_adj
octopus@octopus:~$
octopus@octopus:~$ adb logcat -b system -t 5
D/PowerManagerService(  500): updateScreenStateLocked: mDisplayReady=true, newScreenState=0, mWakefulness=0, mWakeLockSummary=0x1, mUserActivitySummary=0x0, mBootCompleted=true
D/PowerManagerService(  500): handleSandman: canDream=false, mWakefulness=Asleep
V/NotificationService(  500): enqueueNotificationInternal: pkg=com.kindroid.security id=1020 notification=Notification(pri=0 contentView=com.kindroid.security/0x7f030052 vibrate=null sound=null defaults=0x0 flags=0x2 kind=[null])
V/NotificationService(  500): notifications are enabled for com.kindroid.security
V/NotificationService(  500): Assigned score=0 to Notification(pri=0 contentView=com.kindroid.security/0x7f030052 vibrate=null sound=null defaults=0x0 flags=0x2 kind=[null])
octopus@octopus:~$
octopus@octopus:~$ adb logcat -b event -t 5
Unable to open log device '/dev/log/event': No such file or directory
octopus@octopus:~$ adb logcat -b events -t 5
I/notification_cancel(  500): [com.kindroid.security,1026,NULL,0,0,64]
I/notification_enqueue(  500): [com.kindroid.security,1020,NULL,0,Notification(pri=0 contentView=com.kindroid.security/0x7f030052 vibrate=null sound=null defaults=0x0 flags=0x2 kind=[null])]
I/notification_cancel(  500): [com.kindroid.security,1026,NULL,0,0,64]
I/notification_enqueue(  500): [com.kindroid.security,1020,NULL,0,Notification(pri=0 contentView=com.kindroid.security/0x7f030052 vibrate=null sound=null defaults=0x0 flags=0x2 kind=[null])]
I/notification_cancel(  500): [com.kindroid.security,1026,NULL,0,0,64]
octopus@octopus:~$

以二进制形式输出日志 : 使用 adb logcat -B 命令;

octopus@octopus:~$ adb logcat -B  -t 5
O��_�3ZS�4gps_mt3326nmea_reader_parse: line = 1218GPS get accuracy failed, fix mode:1
^��_�3ZS�=gps_mt3326nmea_reader_addc: line = 1331the structure include nmea_cb address is 0x658cc8e8
H��_�3ZSEGEgps_mt3326nmea_reader_addc: line = 1332nmea_cb address is 0x5d2fe279
i���3ZS�)>ADB_SERVICEScreate_local_service_socket() name=shell:export ANDROID_LOG_TAGS="" ; exec logcat -B -t 5
7*E*E�3ZSo�YADB_SERVICESadb: unable to open /proc/17706/oom_adj

(2) 过滤项解析

过滤项格式 : <tag>[:priority] , 标签:日志等级, 默认的日志过滤项是 " *:I " ;

-- V : Verbose (明细);

-- D : Debug (调试);

-- I : Info (信息);

-- W : Warn (警告);

-- E : Error (错误);

-- F : Fatal (严重错误);

-- S : Silent(Super all output) (最高的优先级, 可能不会记载东西);

过滤指定等级日志 : 使用 adb logcat 10 *:E 命令, 显示 Error 以上级别的日志;

octopus@octopus:~$ adb logcat *:E

Note: log switch off, only log_main and log_events will have logs!
--------- beginning of /dev/log/main
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/dalvikvm(  756): GC_CONCURRENT freed 1809K, 27% free 19489K/26695K, paused 16ms+5ms, total 109ms
E/WifiHW  (  441): wifi_send_command : SCAN ; interface index=0;
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/dalvikvm(  756): GC_CONCURRENT freed 1820K, 27% free 19490K/26695K, paused 16ms+3ms, total 102ms
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;

过滤指定标签等级日志 : 使用 adb logcat WifiHW:D *:S 命令进行过滤;

-- 命令含义 : 输出10条日志, 日志是标签为 WifiHW, 并且优先级 Debug(调试) 等级以上的级别的日志;

-- 注意 *:S : 如果没有 *S 就会输出错误;

octopus@octopus:~$ adb logcat WifiHW:D *:S

Note: log switch off, only log_main and log_events will have logs!
--------- beginning of /dev/log/main
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;

可以同时设置多个过滤器 : 使用 adb logcat WifiHW:D dalvikvm:I *:S 命令, 输出 WifiHW 标签的 Debug 以上级别和 dalvikvm 标签的 Info 以上级别的日志;

octopus@octopus:~$ adb logcat WifiHW:D dalvikvm:I *:S 

Note: log switch off, only log_main and log_events will have logs!
--------- beginning of /dev/log/main
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/dalvikvm(  756): GC_CONCURRENT freed 1820K, 27% free 19490K/26695K, paused 17ms+2ms, total 110ms
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/dalvikvm(  756): GC_CONCURRENT freed 1810K, 27% free 19489K/26695K, paused 17ms+5ms, total 108ms
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;

2. 使用管道过滤日志

(1) 过滤固定字符串

过滤固定字符串 : 只要命令行出现的日志都可以过滤, 不管是不是标签;

-- 命令 : adb logcat | grep Wifi ;

octopus@octopus:~$ adb logcat | grep Wifi
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN ; interface index=0;
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;
E/WifiHW  (  441): wifi_send_command : AP_SCAN 1 ; interface index=0;
E/WifiHW  (  441): wifi_send_command : SCAN_RESULTS ; interface index=0;

过滤字符串忽略大小写 : adb logcat | grep -i wifi ;

(2) 使用正则表达式匹配

分析日志 : 该日志开头两个字符是 "V/", 后面开始就是标签, 写一个正则表达式 "^..ActivityManager", 就可以匹配日志中的 "V/ActivityManager" 字符串;

V/ActivityManager(  574): getTasks: max=1, flags=0, receiver=null

正则表达式过滤日志 : 使用上面的正则表达式组成命令 adb logcat | grep "^..Activity" ;

作者 : 万境绝尘转载请著名出处