Android Open Source - HelloWebView Preferences Utils

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License

The source code is released under:
Apache License
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Java Source Code

package com.mengdd.hellowebview.utils;
//from w  ww  . jav  a2  s  .  c o m
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import android.content.Context;
import android.content.SharedPreferences;

public class PreferencesUtils {

    private static SharedPreferences.Editor mEditer = null;

    private final static String PREFERENCE_NAME = "hello_webview_preferences";

    private static SharedPreferences getSharedPreferences(Context context) {
        return context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
    }

    /**
     * ??boolean???
     *
     * @param key
     *            ???????
     * @return ??key??, ??????false
     */
    public static boolean loadBoolean(Context context, String key) {
        return loadBoolean(context, key, false);
    }

    /**
     * ??boolean???
     *
     * @param key
     *            ???????
     * @param defValue
     *            ??key???????
     * @return ??key?boolean?
     */
    public static boolean loadBoolean(Context context, String key, boolean defValue) {
        return getSharedPreferences(context).getBoolean(key, defValue);
    }

    /**
     * ??int???
     *
     * @param key
     *            ???????
     * @return ??key??, ??????0
     */
    public static int loadInt(Context context, String key) {
        return loadInt(context, key, 0);
    }

    /**
     * ??int???
     *
     * @param key
     *            ???????
     * @param defValue
     *            ??key???????
     * @return ??key?int?
     */
    public static int loadInt(Context context, String key, int defValue) {
        return getSharedPreferences(context).getInt(key, defValue);
    }

    /**
     * ??float???
     *
     * @param key
     *            ???????
     * @return ??key??, ??????0.0f
     */
    public static float loadFloat(Context context, String key) {
        return loadFloat(context, key, 0.0f);
    }

    /**
     * ??float???
     *
     * @param key
     *            ???????
     * @param defValue
     *            ??key???????
     * @return ??key?float?
     */
    public static float loadFloat(Context context, String key, float defValue) {
        return getSharedPreferences(context).getFloat(key, defValue);
    }

    /**
     * ??long???
     *
     * @param key
     *            ???????
     * @return ??key??, ??????0L
     */
    public static long loadLong(Context context, String key) {
        return loadLong(context, key, 0L);
    }

    /**
     * ?????
     *
     * @param key
     *            ???????
     * @param defValue
     *            ??key???????
     * @return ??key??
     */
    public static long loadLong(Context context, String key, long defValue) {
        return getSharedPreferences(context).getLong(key, defValue);
    }

    /**
     * ??String???
     *
     * @param key
     *            ???????
     * @return ??key??, ??????null
     */
    public static String loadString(Context context, String key) {
        return loadString(context, key, null);
    }

    /**
     * ??String???
     *
     * @param key
     *            ???????
     * @param defValue
     *            ??key???????
     * @return ??key?String?
     */
    public static String loadString(Context context, String key, String defValue) {
        return getSharedPreferences(context).getString(key, defValue);
    }

    /**
     * ?????key?boolean???
     *
     * @param key
     *            ????????
     * @param value
     *            ?????boolean?
     */
    public static void saveBoolean(Context context, String key, boolean value) {
        if (mEditer == null) {
            mEditer = getSharedPreferences(context).edit();
        }
        mEditer.putBoolean(key, value);
        mEditer.commit();
    }

    /**
     * ?????key?int???
     *
     * @param key
     *            ????????
     * @param value
     *            ?????int?
     */
    public static void saveInt(Context context, String key, int value) {
        if (mEditer == null) {
            mEditer = getSharedPreferences(context).edit();
        }
        mEditer.putInt(key, value);
        mEditer.commit();
    }

    /**
     * ?????key?float???
     *
     * @param key
     *            ????????
     * @param value
     *            ?????float?
     */
    public static void saveFloat(Context context, String key, float value) {
        if (mEditer == null) {
            mEditer = getSharedPreferences(context).edit();
        }
        mEditer.putFloat(key, value);
        mEditer.commit();
    }

    /**
     * ?????key?long???
     *
     * @param key
     *            ????????
     * @param value
     *            ?????long?
     */
    public static void saveLong(Context context, String key, long value) {
        if (mEditer == null) {
            mEditer = getSharedPreferences(context).edit();
        }
        mEditer.putLong(key, value);
        mEditer.commit();
    }

    /**
     * ?????key?String???
     *
     * @param key
     *            ????????
     * @param value
     *            ?????String?
     */
    public static void saveString(Context context, String key, String value) {
        if (mEditer == null) {
            mEditer = getSharedPreferences(context).edit();
        }
        mEditer.putString(key, value);
        mEditer.commit();
    }

    /**
     * ?????key?String????????
     *
     * @param string
     *            ??????????????
     */
    public static void saveStrings(Context context, Map<String, String> strings) {
        if (strings == null || strings.isEmpty()) {
            return;
        }
        if (mEditer == null) {
            mEditer = getSharedPreferences(context).edit();
        }
        Set<Entry<String, String>> datas = strings.entrySet();
        for (Entry<String, String> entry : datas) {
            mEditer.putString(entry.getKey(), entry.getValue());
        }
        mEditer.commit();
    }

}
Java Source Code List
