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adb logcat -h的帮助信息
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"
日志 用来在命令行中显示日志流： adb logcat 按标签名过滤 adb logcat -s TAG_NAME adb logcat -s TAG_NAME_1 TAG_NAME_2# exampleadb logcat -s TEST adb logcat -s TEST MYAPP 按优先级过滤 显示指定告警优先级及以上的日志： adb logcat "*:PRIORITY"# exampleadb logcat "*:W" 优先级设置如下： V：Verbose （最低优先级） D：Debug I：Info W：Warning E：Error F：Fatal S：Silent （最高优先级, 在这个级别上不会打印任何信息)） 按标签名和优先级过滤 adb logcat -s TAG_NAME:PRIORITY adb logcat -s TAG_NAME_1:PRIORITY TAG_NAME_2:PRIORITY` # example adb logcat -s TEST: W 使用grep过滤 另外，在支持grep的系统中，logcat输出可以通过管道发送给grep： adb logcat | grep "SEARCH_TERM"adb logcat | grep "SEARCH_TERM_1\|SEARCH_TERM_2"# exampleadb logcat | grep "Exception"adb logcat | grep "Exception\|Error" 清除logcat的缓冲区 使用这个命令来清除缓冲区，并清除旧的日志数据： adb logcat -c
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原文地址：http://my.oschina.net/u/199776/blog/525952
