Articles → Android → Logcat In Android

Logcat In Android

What Is Logcat?

Log Class

How To Open Logcat Window?

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.

Priority

Example

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");
Log.wtf("assert_tag", "This is the assert tag");

Important Components Of Logcat Window

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.