지나간 일자의 log directory 지우기 refer to KeepItSilent.apk static final SimpleDateFormat sdfDate = new SimpleDateFormat("yyyy-MM-dd", Locale.US); private final String PREFIX = "log_"; . . . void deleteOldLogFiles() { // remove older than n days String oldDate = PREFIX + sdfDate.format(System.currentTimeMillis() - 2*24*60*60*1000L); if (packageDir == null) packageDir = getPackageDirectory(); File[] file..