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CardEmulation / src / com.example.android.cardemulation /

AccountStorage.java

       
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        /*
       
       
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        * Copyright (C) 2013 The Android Open Source Project
       
       
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        *
       
       
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        * Licensed under the Apache License, Version 2.0 (the "License");
       
       
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        * you may not use this file except in compliance with the License.
       
       
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        * You may obtain a copy of the License at
       
       
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        *
       
       
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        *      http://www.apache.org/licenses/LICENSE-2.0
       
       
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        *
       
       
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        * Unless required by applicable law or agreed to in writing, software
       
       
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        * distributed under the License is distributed on an "AS IS" BASIS,
       
       
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        * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       
       
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        * See the License for the specific language governing permissions and
       
       
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        * limitations under the License.
       
       
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        */
       
       
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        package com.example.android.cardemulation;
       
       
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        import android.content.Context;
       
       
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        import android.content.SharedPreferences;
       
       
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        import android.preference.PreferenceManager;
       
       
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        import android.util.Log;
       
       
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        /**
       
       
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        * Utility class for persisting account numbers to disk.
       
       
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        *
       
       
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        * <p>The default SharedPreferences instance is used as the backing storage. Values are cached
       
       
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        * in memory for performance.
       
       
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        *
       
       
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        * <p>This class is thread-safe.
       
       
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        */
       
       
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        public class AccountStorage {
       
       
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        private static final String PREF_ACCOUNT_NUMBER = "account_number";
       
       
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        private static final String DEFAULT_ACCOUNT_NUMBER = "00000000";
       
       
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        private static final String TAG = "AccountStorage";
       
       
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        private static String sAccount = null;
       
       
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        private static final Object sAccountLock = new Object();
       
       
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        public static void SetAccount(Context c, String s) {
       
       
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        synchronized(sAccountLock) {
       
       
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        Log.i(TAG, "Setting account number: " + s);
       
       
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        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(c);
       
       
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        prefs.edit().putString(PREF_ACCOUNT_NUMBER, s).commit();
       
       
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        sAccount = s;
       
       
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        }
       
       
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        }
       
       
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        public static String GetAccount(Context c) {
       
       
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        synchronized (sAccountLock) {
       
       
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        if (sAccount == null) {
       
       
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        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(c);
       
       
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        String account = prefs.getString(PREF_ACCOUNT_NUMBER, DEFAULT_ACCOUNT_NUMBER);
       
       
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        sAccount = account;
       
       
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        }
       
       
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        return sAccount;
       
       
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        }
       
       
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        }
       
       
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        }