[Android] Logcat Introduction

1. Javase logs are usually printed in the console console, but the android system is Linux It is impossible to print the logs to the console under Windows, requiring an interface thatlogcat can put android Log buffer information Inside Out,cmd to adb Debug Bridge tool,adb logcat Can see a lot of log information

2. The log class specializes in logging information, log information is hierarchical,verbose(reminders),debug(Debug),info (information),warning(warning),error(wrong)

3. LOG.V (tag,msg) reminds thattag is generally the class name of the current class

4. Log information is much more, use the left save filter To filter, left + #, fill in fileter name  by  log tag  filtered pid,application  name

System.out.println () and System.err.println () will print info and warning Information Tag is that system.xxx not recommended for use

[Android] Logcat Introduction