get all keys and values of SharedPreferences

            SharedPreferences prefb = getSharedPreferences(getResources().getString(R.string.app_name), Context.MODE_PRIVATE);
            Map<String,?> keys = prefb.getAll();

            for (Map.Entry<String,?> entry : keys.entrySet()){
                Log.d(TAG, "SharedPreferences::" + entry.getKey() + "::" + entry.getValue().toString());
            }