public static void deleteSharedPreferences(Context appContext) { try { ApplicationInfo info = appContext.getPackageManager() .getApplicationInfo(appContext.getPackageName(), 0); String dirPath = info.dataDir + File.separator + "shared_prefs" + File.separator; File dir = new File(dirPath); if (dir.exists() && dir.isDirectory()) { String[] list = dir.list(); int size = list.length; for (int i = 0; i