logcat

The Android logging system provides a mechanism for collecting and viewing system debug output. Logs from various applications and portions of the system are collected in a series of circular buffers, which then can be viewed and filtered by the logcat command. You can use logcat from an ADB shell to view the log messages.

For complete information about logcat options and filtering specifications, see Reading and Writing Logs.

For more information on accessing logcat from DDMS, instead of the command line, see Using DDMS.