You can run logcat as an adb command or directly in a shell prompt of your emulator or connected device. To view log output using adb, navigate to your SDK platform-tools/ directory and execute:
$ adb logcatAlternatively, you can create a shell connection to a device and then execute:
$ adb shell
$ logcatOne useful command is:
adb logcat -v threadtimeThis displays the date, invocation time, priority, tag, and the PID and TID of the thread issuing the message in a long message format.
Filtering
Logcat logs got so called log levels:
V — Verbose, D — Debug, I — Info, W — Warning, E — Error, F — Fatal, S — Silent
You can filter logcat by log level as well. For instance if you want only to output Debug level:
adb logcat *:DLogcat can be filtered by a package name, of course you can combine it with the log level filter:
adb logcat <package-name>:<log level>You can also filter the log using grep (more on filtering logcat output here):
adb logcat | grep <some text>In Windows, filter can be used using findstr, for example:
adb logcat | findstr <some text>To view alternative log buffer [main|events|radio], run the logcat with the -b option:
adb logcat -b radioSave output in file :
adb logcat > logcat.txtSave output in file while also watching it:
adb logcat | tee logcat.txtCleaning the logs:
adb logcat -c