Android / Log / Timber - print line number on timber logs. source=https://caster.io/episodes/episode-14-logging-with-timber/

App.java

public class App extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        Timber.plant(new Timber.DebugTree() {
            @Override
            protected String createStackElementTag(StackTraceElement element) {
                return super.createStackElementTag(element) + ":" + element.getLineNumber();
            }
        });
    }
}