@Override
    public void println(int logLevel, String tag, String msg) {
        String flattenedLog = flattener.flatten(logLevel, tag, msg).toString();
        System.out.println(flattenedLog);
    }
Constructor.

@param flattener the log flattener when print a log
android/android_framework/base/src/main/java/com/elvishew/xlog/printer/ConsolePrinter.java