ANDROID 学习笔记（二） 用户登陆问题 TOKEN SESSION 缓存

首先介绍TOKEN 缓存问题

写个工具类 里面放入

/*
	 * 获取缓存的token
	 */
	public static String getCachedToken(Context context){
		return context.getSharedPreferences(APP_ID, context.MODE_PRIVATE).getString(KEY_TOKEN, null);
	}
	
	/*
	 * 缓存token
	 */
	public static void cacheToken(Context context, String token){
		
		Editor e = context.getSharedPreferences(APP_ID, context.MODE_PRIVATE).edit();
		e.putString(KEY_TOKEN, token);
		e.commit();
	}

ANDROID API 说明：

Interface for accessing and modifying preference data returned by getSharedPreferences(String, int). For any particular set of preferences, there is a single instance of this class that all clients share. Modifications to the preferences must go through an SharedPreferences.Editor object to ensure the preference values remain in a consistent state and control when they are committed to storage. Objects that are returned from the various get methods must be treated as immutable by the application.

简要说明： 修改完数据，一定要提交，数据的有多重保存方式

• MODE_PRIVATE

• MODE_WORLD_READABLE

• MODE_WORLD_WRITEABLE

• MODE_MULTI_PROCESS

详细解释见API