To make adb logcat not show past output (i.e., only display new logs as they arrive), you can use the -c (clear) flag to clear the existing log buffer before starting the log output.

Command:

adb logcat -c

This clears the existing logs, and then you can run adb logcat again to see only new logs.

Alternative: One-Liner

If you want to clear and start logging in a single command, use:

adb logcat -c && adb logcat

This ensures you only see logs generated after running the command.

Additional Tips

• Filter logs: Use -s to filter by a specific tag (e.g., adb logcat -s MyApp).
• Persistent logs: If logs persist, check if your device or emulator has a persistent log buffer. Some custom ROMs or devices may require additional flags or root access to fully clear logs.