Android Open Source - android-wear-tutorial User Data

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License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright 2015 Simone Casagranda./*from  www  .j  a v  a  2  s.  c o m*/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alchemiasoft.book.user;

import android.content.ContentValues;
import android.content.Context;
import android.content.SharedPreferences;
import android.support.annotation.NonNull;

/**
 * Entity that wraps the data related to the current user.
 * <p/>
 * Created by Simone Casagranda on 20/12/14.
 */
public class UserData {

    private static final String PREF_NAME = "userdata.pref";

    private static final long DOES_NOT_EXPIRE = Long.MAX_VALUE;

    public static final String KEY_USERNAME = "username";
    public static final String KEY_SUGGESTION_INTERVAL = "suggestion_interval";

    public static enum SuggestionInterval {

        NEVER(-1), NOW(0), TEN_SECS(10), TWENTY_SECS(20), THIRTY_SECS(30);

        private final int mSeconds;

        SuggestionInterval(int seconds) {
            mSeconds = seconds;
        }

        public int seconds() {
            return mSeconds;
        }
    }

    private final Context mContext;
    private final SharedPreferences mPrefs;

    private final ContentValues mValues;

    private static UserData sUserData;
    private static final Object LOCK = new Object();

    private UserData(@NonNull Context context) {
        mContext = context.getApplicationContext();
        mPrefs = mContext.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
        mValues = new ContentValues();
        username(mPrefs.getString(KEY_USERNAME, null));
        suggestionInterval(suggestionInterval(mPrefs.getInt(KEY_SUGGESTION_INTERVAL, SuggestionInterval.NOW.ordinal())));
    }

    /**
     * Allows to load the data available for the current user.
     *
     * @param context
     * @return the current active UserData.
     */
    public static UserData load(Context context) {
        // Double check locking
        if (sUserData == null) {
            synchronized (LOCK) {
                if (sUserData == null) {
                    sUserData = new UserData(context);
                }
            }
        }
        return sUserData;
    }

    public UserData username(String username) {
        mValues.put(KEY_USERNAME, username);
        return this;
    }

    public String username() {
        return mValues.getAsString(KEY_USERNAME);
    }

    public UserData suggestionInterval(@NonNull SuggestionInterval interval) {
        mValues.put(KEY_SUGGESTION_INTERVAL, interval.ordinal());
        return this;
    }

    public SuggestionInterval suggestionInterval() {
        final int index = mValues.getAsInteger(KEY_SUGGESTION_INTERVAL);
        return suggestionInterval(index);
    }

    protected SuggestionInterval suggestionInterval(int index) {
        final SuggestionInterval[] intervals = SuggestionInterval.values();
        return index < 0 || index >= intervals.length ? SuggestionInterval.NEVER : intervals[index];
    }
}

Java Source Code List