Android SharedPreferences工具类

    public class PreferenceUtil {                    private static SharedPreferences mSharedPreferences;                    private static synchronized SharedPreferences getPreferneces() {                if (mSharedPreferences == null) {                    // mSharedPreferences = App.context.getSharedPreferences(                    // PREFERENCE_NAME, Context.MODE_PRIVATE);                    mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(App.getInstance());                }                return mSharedPreferences;            }                    /**             * 打印所有             */            public static void print() {                System.out.println(getPreferneces().getAll());            }                    /**             * 清空保存在默认SharePreference下的所有数据             */            public static void clear() {                getPreferneces().edit().clear().commit();            }                    /**             * 保存字符串             *              * @return             */            public static void putString(String key, String value) {                getPreferneces().edit().putString(key, value).commit();            }                    /**             * 读取字符串             *              * @param key             * @return             */            public static String getString(String key) {                return getPreferneces().getString(key, null);                    }                    /**             * 保存整型值             *              * @return             */            public static void putInt(String key, int value) {                getPreferneces().edit().putInt(key, value).commit();            }                    /**             * 读取整型值             *              * @param key             * @return             */            public static int getInt(String key) {                return getPreferneces().getInt(key, 0);            }                    /**             * 保存布尔值             *              * @return             */            public static void putBoolean(String key, Boolean value) {                getPreferneces().edit().putBoolean(key, value).commit();            }                    public static void putLong(String key, long value) {                getPreferneces().edit().putLong(key, value).commit();            }                    public static long getLong(String key) {                return getPreferneces().getLong(key, 0);            }                    /**             * t 读取布尔值             *              * @param key             * @return             */            public static boolean getBoolean(String key, boolean defValue) {                return getPreferneces().getBoolean(key, defValue);                    }                    /**             * 移除字段             *              * @return             */            public static void removeString(String key) {                getPreferneces().edit().remove(key).commit();            }        }