Timber tree for use with Firebase Crash Reporting. Basically a copy/rewrite of Jake Wharton's CrashlyticsTree.

TimberFirebase.java

    private static class FirebaseTree extends Timber.Tree {
        @Override
        protected void log(int priority, String tag, String message, Throwable t) {
            if (priority == Log.VERBOSE || priority == Log.DEBUG) {
                return;
            }

            FirebaseCrash.log(message);

            if (t != null) {
                FirebaseCrash.report(t);
            }
        }
    }

Have a look at the javadoc of timber

* @param message Formatted log message. May be {@code null}, but then {@code t} will not be.
* @param t Accompanying exceptions. May be {@code null}, but then {@code message} will not be.

So you should check for null when logging the message too.

The FirebaseCrash is deprecated. Please see the fix: https://stackoverflow.com/a/61769726/10322720