A detailed explanation of Android logcat commands.

1 year ago
Emily Johnson
2 minutes

In Android development, logcat is a very useful command line tool that is used to view system and application log messages on a device. It helps developers debug applications and troubleshoot errors and issues. Here is a detailed explanation of the logcat command.

  1. Basic syntax of the logcat command:
    adb logcat [options] [filter-specs]
  2. Common options:
  3. -s: Set up filter rules to only display log messages from specific tags.
  4. -d: Output the log message to the terminal and exit.
  5. -e: Display log messages with error level.
  6. -waiting for new log messages.
  7. Filter rules:
  8. S: Display only messages that are at error level or higher.
  9. *:V: Display all messages.
  10. :: only display messages with specific tag and log level.
  11. “我昨天和朋友去了电影院。”

    “I went to the movie theater with a friend yesterday.”

  12. adb logcat: displays all log messages.
  13. adb logcat -d: Display all log messages and then exit.
  14. adb logcat -s MyApp: Display only log messages with the tag “MyApp”.
  15. Show only the log messages with the tag “MyApp” and the debug level.
  16. Filter specifications:
  17. : Display only the log messages for the specified tag.
  18. *Specify a designated log message level to display.
  19. :: Display only the log messages with the specified tag and level.
  20. Log level:
  21. V: Verbose (lowest level, used for debugging).
  22. D: Debugging information.
  23. General information (I: Info).
  24. Warning.
  25. E: Mistake.
  26. F: Fatal error.
  27. S: Silent (the highest level, no logs displayed).

The above is a detailed explanation of the Android logcat command. Using the logcat command makes it easy to view log messages on the device, helping developers to debug and troubleshoot errors.

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