대상을sharepre에 저장

/**
	 *  base64 SharePref 
	 * 
	 * @param context
	 * @param key
	 * @param object
	 */
	public static void saveObj(Context context, String key, Object object) {
		if (sp == null)
			sp = context.getSharedPreferences(SP_NAME, Context.MODE_PRIVATE);

		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		ObjectOutputStream oos = null;
		try {
			oos = new ObjectOutputStream(baos);
			oos.writeObject(object);
			//  base64 
			String objBase64 = new String(Base64.encode(baos.toByteArray(),
					Base64.DEFAULT));

			sp.edit().putString(key, objBase64).commit();
			oos.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 *  SharePref base64 
	 * 
	 * @param context
	 * @param key
	 * @param defValue
	 * @return
	 */
	public static Object getObj(Context context, String key) {
		if (sp == null)
			sp = context.getSharedPreferences(SP_NAME, Context.MODE_PRIVATE);
		String objBase64 = sp.getString(key, null);
		if (TextUtils.isEmpty(objBase64))
			return null;

		//  Base64 
		byte[] base64Bytes = Base64
				.decode(objBase64.getBytes(), Base64.DEFAULT);
		ByteArrayInputStream bais = new ByteArrayInputStream(base64Bytes);

		ObjectInputStream ois;
		Object obj = null;
		try {
			ois = new ObjectInputStream(bais);
			obj = (Object) ois.readObject();
			ois.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return obj;
	}