adb logcat

In this article, we shall look at the “adb logcat” adb command and also how to use “adb logcat” command, with an example.

How to use adb logcat

Prints log data to the screen.

adb logcat [option] [filter-specs]

adb logcat
Notes: press Ctrl-C to stop monitor
adb logcat *:V lowest priority, filter to only show Verbose level
adb logcat *:D filter to only show Debug level
adb logcat *:I filter to only show Info level
adb logcat *:W filter to only show Warning level
adb logcat *:E filter to only show Error level
adb logcat *:F filter to only show Fatal level
adb logcat *:S Silent, highest priority, on which nothing is ever printed

adb logcat -b <Buffer>

adb logcat -b radio View the buffer that contains radio/telephony related messages.
adb logcat -b event View the buffer containing events-related messages.
adb logcat -b main default
adb logcat -c Clears the entire log and exits.
adb logcat -d Dumps the log to the screen and exits.
adb logcat -f test.logs Writes log message output to test.logs .
adb logcat -g Prints the size of the specified log buffer and exits.
adb logcat -n <count> Sets the maximum number of rotated logs to <count>. 
Notes: The default value is 4. Requires the -r option.
adb logcat -r <kbytes> Rotates the log file every <kbytes> of output.
Notes: The default value is 16. Requires the -f option.
adb logcat -s Sets the default filter spec to silent.

adb logcat -v <format>

adb logcat -v brief Display priority/tag and PID of the process issuing the message (default format).
adb logcat -v process Display PID only.)
adb logcat -v tag Display the priority/tag only.
adb logcat -v raw Display the raw log message, with no other metadata fields.
adb logcat -v time Display the date, invocation time, priority/tag, and PID of the process issuing the message.
adb logcat -v threadtime Display the date, invocation time, priority, tag, and the PID and TID of the thread issuing the message.
adb logcat -v long Display all metadata fields and separate messages with bl

If you are looking for the latest ADB Driver for Android, you can get from here: ADB Driver

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