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Logcat In Android

What Is Logcat?

Log Class

How To Open Logcat Window?

Picture showing how to open logcat window
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Format Of Log Messages

<Date><Time><process_id>-<thread id>/ <Priority>/<tag>:<message>

  1. Date - Specifies the date, when the log is created.
  2. Time - Specifies the time, when the log is created.
  3. Process Id - Specifies the current process.
  4. Thread Id - Specifies the current thread.
  5. Priority - What is the priority of message.
  6. Tag - Specifies the originator of message
  7. Message - Message you want to display in logcat window.


PriorityMeaningLog function syntax
VVerboseLog.v(tag, message);
DDebugLog.d(tag, message);
IInfoLog.i(tag, message);
WWarningLog.w(tag, message);
EErrorLog.e(tag, message);, message);


Log.v("verbose_tag", "This is the verbose tag");
Log.d("debug_tag", "This is the debug tag");
Log.i("info_tag", "This is the info tag");
Log.w("warning_tag", "This is the warning tag");
Log.e("error_tag", "This is the error tag");"assert_tag", "This is the assert tag");

Picture showing how string is written inside the logcat window using log.v
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Important Components Of Logcat Window

Picture showing the different parts of the logcat window
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  1. Device (or emulator) - Where android program is running
  2. Application Name - Name of the application.
  3. Priority - Specifies the priority
  4. Search box - For searching the log.
  5. Clear log -Delete all the logs from logcat window.

Posted By  -  Karan Gupta
Posted On  -  Friday, November 29, 2019


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