读取SharedPreferences的速度 [英] Read speed of SharedPreferences

问题描述

SharedPreferences有多快?有没有一种方法可以将它们存储在内存中以进行阅读?我需要查询ListView的少量数据才能显示每个单元格，并且我担心对闪存的调用太慢.我不担心写入速度，因为写入很少发生.我正在考虑仅使用JSON对象而不是SharedPreferences来保留数据.有什么想法吗?

How fast are SharedPreferences? Is there a way to put them in memory for reading? I have a small amount of data that a ListView has to query to display each cell, and I'm worried that a call to flash memory will be too slow. I'm not worried about write speed, as writes will happen infrequently. I'm considering just using a JSON object to persist the data instead of SharedPreferences. Any thoughts?

推荐答案

有没有一种方法可以将它们存储在内存中以供阅读?

Is there a way to put them in memory for reading?

在第一个引用之后，它们在内存中.第一次检索特定的SharedPreferences(例如PreferenceManager.getDefaultSharedPreferences())时，数据是从磁盘加载的，并保留在周围.

They are in memory, after the first reference. The first time you retrieve a specific SharedPreferences (e.g., PreferenceManager.getDefaultSharedPreferences()), the data is loaded from disk, and kept around.

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