SharePreferenceUtil.java

package xyz.yhsj.yhutils.sp;

import java.util.Map;
import java.util.Set;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;

/**
 * SharedPreferences 工具类
 * 
 */
public class SharePreferenceUtil {

	private static SharedPreferences sp;

	/** 保存在手机里面的文件名 */
	private final static String SharePreferncesName = "SP_SETTING";

	/**
	 * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法
	 * 
	 * @param context
	 * @param key
	 *            键值对的key
	 * @param value
	 *            键值对的值
	 * @return 是否保存成功
	 */
	public static boolean setValue(Context context, String key, Object value) {
		if (sp == null) {
			sp = context.getSharedPreferences(SharePreferncesName,
					Context.MODE_PRIVATE);
		}

		Editor edit = sp.edit();
		if (value instanceof String) {
			return edit.putString(key, (String) value).commit();
		} else if (value instanceof Boolean) {
			return edit.putBoolean(key, (Boolean) value).commit();
		} else if (value instanceof Float) {
			return edit.putFloat(key, (Float) value).commit();
		} else if (value instanceof Integer) {
			return edit.putInt(key, (Integer) value).commit();
		} else if (value instanceof Long) {
			return edit.putLong(key, (Long) value).commit();
		} else if (value instanceof Set) {
			new IllegalArgumentException("Value can not be Set object!");
			return false;
		}
		return false;
	}

	/**
	 * 得到Boolean类型的值
	 * 
	 * @param context
	 * @param key
	 * @param defaultValue
	 * @return
	 */
	public static boolean getBoolean(Context context, String key,
			boolean defaultValue) {
		if (sp == null) {
			sp = context.getSharedPreferences(SharePreferncesName,
					Context.MODE_PRIVATE);
		}
		return sp.getBoolean(key, defaultValue);
	}

	/**
	 * 得到String类型的值
	 * 
	 * @param context
	 * @param key
	 * @param defaultValue
	 * @return
	 */
	public static String getString(Context context, String key,
			String defaultValue) {
		if (sp == null) {
			sp = context.getSharedPreferences(SharePreferncesName,
					Context.MODE_PRIVATE);
		}
		return sp.getString(key, defaultValue);
	}

	/**
	 * 得到Float类型的值
	 * 
	 * @param context
	 * @param key
	 * @param defaultValue
	 * @return
	 */
	public static Float getFloat(Context context, String key, float defaultValue) {
		if (sp == null) {
			sp = context.getSharedPreferences(SharePreferncesName,
					Context.MODE_PRIVATE);
		}
		return sp.getFloat(key, defaultValue);
	}

	/**
	 * 得到Int类型的值
	 * 
	 * @param context
	 * @param key
	 * @param defaultValue
	 * @return
	 */
	public static int getInt(Context context, String key, int defaultValue) {
		if (sp == null) {
			sp = context.getSharedPreferences(SharePreferncesName,
					Context.MODE_PRIVATE);
		}
		return sp.getInt(key, defaultValue);
	}

	/**
	 * 得到Long类型的值
	 * 
	 * @param context
	 * @param key
	 * @param defaultValue
	 * @return
	 */
	public static long getLong(Context context, String key, long defaultValue) {
		if (sp == null) {
			sp = context.getSharedPreferences(SharePreferncesName,
					Context.MODE_PRIVATE);
		}
		return sp.getLong(key, defaultValue);
	}

	/**
	 * 移除某个key值已经对应的值
	 * 
	 * @param context
	 * @param key
	 */
	public static boolean remove(Context context, String key) {
		SharedPreferences sp = context.getSharedPreferences(
				SharePreferncesName, Context.MODE_PRIVATE);
		Editor editor = sp.edit();
		editor.remove(key);
		return editor.commit();
	}

	/**
	 * 清除所有数据
	 * 
	 * @param context
	 * @return 是否成功
	 */
	public static boolean clear(Context context) {
		SharedPreferences sp = context.getSharedPreferences(
				SharePreferncesName, Context.MODE_PRIVATE);
		Editor editor = sp.edit();
		editor.clear();
		return editor.commit();
	}

	/**
	 * 查询某个key是否已经存在
	 * 
	 * @param context
	 * @param key
	 * @return 是否存在
	 */
	public static boolean contains(Context context, String key) {
		SharedPreferences sp = context.getSharedPreferences(
				SharePreferncesName, Context.MODE_PRIVATE);
		boolean result = sp.contains(key);

		return result;
	}

	/**
	 * 返回所有的键值对
	 * 
	 * @param context
	 * @return Map<String, ?>
	 */
	public static Map<String, ?> getAll(Context context) {
		SharedPreferences sp = context.getSharedPreferences(
				SharePreferncesName, Context.MODE_PRIVATE);
		return sp.getAll();
	}

}