Crashlytics Tree

CrashlyticsTree.java

public final class CrashlyticsTree extends HollowTree {
    private static final Pattern ANONYMOUS_CLASS = Pattern.compile("\\$\\d+$");

    private enum LogLevel {
        INFO,
        ERROR,
        WARNING
    }

    @Override public void i(String message, Object... args) {
        log(LogLevel.INFO, createTag(), formatString(message, args));
    }

    @Override public void i(Throwable t, String message, Object... args) {
        log(LogLevel.INFO, createTag(), formatString(message, args), t);
    }

    @Override public void w(String message, Object... args) {
        log(LogLevel.WARNING, createTag(), formatString(message, args));
    }

    @Override public void w(Throwable t, String message, Object... args) {
        log(LogLevel.WARNING, createTag(), formatString(message, args), t);
    }

    @Override public void e(String message, Object... args) {
        log(LogLevel.ERROR, createTag(), formatString(message, args));
    }

    @Override public void e(Throwable t, String message, Object... args) {
        log(LogLevel.ERROR, createTag(), formatString(message, args), t);
    }

    private void log(LogLevel logLevel, String tag, String message) {
        log(logLevel, tag, message, null);
    }

    private void log(LogLevel logLevel, String tag, String message, Throwable t) {
        Crashlytics.log(String.format("%s/%s: %s", logLevel, tag, message));
        Crashlytics.logException(t); // always log even if null, crashylitcs ignores them
    }

    /**
     * Create a tag from the calling class (4 up).
     * This is not exactly fast but then again this really shouldn't be called a lot
     */
    private static String createTag() {
        String tag = new Throwable().getStackTrace()[4].getClassName();
        Matcher m = ANONYMOUS_CLASS.matcher(tag);
        if (m.find()) {
            tag = m.replaceAll("");
        }
        return tag.substring(tag.lastIndexOf('.') + 1);
    }

    private static String formatString(String message, Object... args) {
        return args.length == 0 ? message : String.format(message, args);
    }
}