Andorid开发工具类之——SPUtils

SharedPreferences 是开发中经常用到的保存数据的一种方式，之前在网上看到一些类似的工具类，但是都没有达到理想的要求，搜集了网上的资料后自己又改造了代码，现在达到了理想的要求，上代码：
public class SPUtils {
/**
* 保存在手机里面的文件名
*/
public static final String FILE_NAME = “config”;

/**
 * 保存数据的方法，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
 * @param object
 */
public static void put(Context context, String key, Object object) {

    SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
            Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sp.edit();

    if (object instanceof String) {
        editor.putString(key, (String) object);
    } else if (object instanceof Integer) {
        editor.putInt(key, (Integer) object);
    } else if (object instanceof Boolean) {
        editor.putBoolean(key, (Boolean) object);
    } else if (object instanceof Float) {
        editor.putFloat(key, (Float) object);
    } else if (object instanceof Long) {
        editor.putLong(key, (Long) object);
    } else {
        editor.putString(key, object.toString());
    }

    SharedPreferencesCompat.apply(editor);
}

/**
 * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值
 *
 * @param context
 * @param key
 * @param defaultObject
 * @return
 */

/* public static Object get(Context context, String key, Object defaultObject) {
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
if (defaultObject instanceof String) {
return sp.getString(key, (String) defaultObject);
} else if (defaultObject instanceof Integer) {
return sp.getInt(key, (Integer) defaultObject);
} else if (defaultObject instanceof Boolean) {
return sp.getBoolean(key, (Boolean) defaultObject);
} else if (defaultObject instanceof Float) {
return sp.getFloat(key, (Float) defaultObject);
} else if (defaultObject instanceof Long) {
return sp.getLong(key, (Long) defaultObject);
}*/
public static T get(Context context, String key, T defaultObject) {
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
if (defaultObject instanceof String) {
return (T) sp.getString(key, (String) defaultObject);
} else if (defaultObject instanceof Integer) {
Integer anInt = sp.getInt(key, (Integer) defaultObject);
return (T)anInt;
} else if (defaultObject instanceof Boolean) {
Boolean aBoolean = sp.getBoolean(key, (Boolean) defaultObject);
return (T) aBoolean;
} else if (defaultObject instanceof Float) {
Float aFloat = sp.getFloat(key, (Float) defaultObject);
return (T) aFloat;
} else if (defaultObject instanceof Long) {
Long aLong = sp.getLong(key, (Long) defaultObject);
return (T) aLong;
}

    return null;
}

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

/**
 * 清除所有数据
 *
 * @param context
 */
public static void clear(Context context) {
    SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
            Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sp.edit();
    editor.clear();
    SharedPreferencesCompat.apply(editor);
}

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

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

/**
 * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类
 *
 * @author zhy
 */
private static class SharedPreferencesCompat {
    private static final Method sApplyMethod = findApplyMethod();

    /**
     * 反射查找apply的方法
     *
     * @return
     */
    @SuppressWarnings({"unchecked", "rawtypes"})
    private static Method findApplyMethod() {
        try {
            Class clz = SharedPreferences.Editor.class;
            return clz.getMethod("apply");
        } catch (NoSuchMethodException e) {
        }

        return null;
    }

    /**
     * 如果找到则使用apply执行，否则使用commit
     *
     * @param editor
     */
    public static void apply(SharedPreferences.Editor editor) {
        try {
            if (sApplyMethod != null) {
                sApplyMethod.invoke(editor);
                return;
            }
        } catch (IllegalArgumentException e) {
        } catch (IllegalAccessException e) {
        } catch (InvocationTargetException e) {
        }
        editor.commit();
    }
}

}