YUNOVA · Android Development · Module 5: Your first useful app

Debugging with Logcat

Notes for offline study · 3 November 2026

Debugging with Logcat

Key points

  • Logcat shows the log messages your app and the system write while the app runs.
  • Log.d, Log.i, Log.w and Log.e write messages at different priority levels.
  • Filter Logcat by package, tag or level to find your own messages quickly.