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  • adb logcat 命令使用说明

    logcat命令主要用来获取Android运行时的日志,通过不同的参数可以获取可以获取整个系统不同层面的日志信息。

    下面将先对各个参数进行简单介绍,之后会列举一下Android开发过程中常用场景日志抓取命令。  

    –help

    主要用来获取logcat命令帮助信息。

    命令:adb logcat -help

    [D:~]$ adb logcat -help
    logcat: invalid option -- h
    Unrecognized Option
    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)
      -t '<time>'     print most recent lines since specified time (implies -d)
      -T <count>      print only the most recent <count> lines (does not imply -d)
      -T '<time>'     print most recent lines since specified time (not imply -d)
                      count is pure numerical, time is 'MM-DD hh:mm:ss.mmm'
      -g              get the size of the log's ring buffer and exit
      -b <buffer>     Request alternate ring buffer, 'main', 'system', 'radio',
                      'events', 'crash' or 'all'. Multiple -b parameters are
                      allowed and results are interleaved. The default is
                      -b main -b system -b crash.
      -B              output the log in binary.
      -S              output statistics.
      -G <size>       set size of log ring buffer, may suffix with K or M.
      -p              print prune white and ~black list. Service is specified as
                      UID, UID/PID or /PID. Weighed for quicker pruning if prefix
                      with ~, otherwise weighed for longevity if unadorned. All
                      other pruning activity is oldest first. Special case ~!
                      represents an automatic quicker pruning for the noisiest
                      UID as determined by the current statistics.
      -P '<list> ...' set prune white and ~black list, using same format as
                      printed above. Must be quoted.
    
    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"

    选项解析

    -s: 设置输出日志的标签, 只显示该标签的日志;

    清空日志缓存

    adb logcat -c

    执行该命令后,将清除系统中的所有日志缓存。

    radio日志获取

    adb logcat -v time -b radio

    执行该命令后,就是打印出带时间格式的radio日志。

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  • 原文地址:https://www.cnblogs.com/shidian/p/10938806.html
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