Can the logcat tag be too long?

Question

Recently, I read the codes of android native app OneTimeInitializer. There are such codes make me confused.

public class OneTimeInitializerService extends IntentService {

    // class name is too long
    private static final String TAG = OneTimeInitializerService.class.getSimpleName()
        .substring(0, 22);
    //...
}

Why it says "class name is too long" and calls "substring(0, 22)"? Does the tag of logcat should not be too long?

Possible duplicate of [The logging tag can be at most 23 characters](http://stackoverflow.com/questions/28168622/the-logging-tag-can-be-at-most-23-characters) — Claudio Redi, Nov 09 '16 at 14:04

score 2 · Answer 1 · edited May 23 '17 at 10:32

2

Log tag's length must be < 23

you can check documentation detail provided under isLoggable

IllegalArgumentException is thrown if the tag.length() > 23.

Here are some links you need to follow link1, link2

Don't forget to check official document of Log

edited May 23 '17 at 10:32

Community

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answered Nov 09 '16 at 12:45

Ravi

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Thanks for your answer and advice. – czjabc Nov 09 '16 at 12:57
1

According to the docs, this only applies for API <= 23: "for Nougat (7.0) releases (API <= 23) and prior, there is no tag limit of concern after this API level" – Traendy Jan 25 '21 at 15:12
@Traendy This is tragic. I now need to change all of log.x() statements that I wrote in the API 8 days. – WebViewer Jan 12 '23 at 14:34

Can the logcat tag be too long?

1 Answers1