如何实现在Android的ListView控件缓存 [英] How to implement ListView caching in Android

问题描述

我有一个ListView其中包含了大量的数据。
在第一时间，我加载从Webservice的所有数据。

I have a ListView which contains a large set of data.
At the first time, I load all the data from a Webservice.

现在我想缓存的数据，这样，如果我再次打开该网页，我可以从缓存中读取再次查询Web服务的数据来代替。

Now I want to cache that data so that, if I'm to open that page again, I can fetch the data from the cache instead of querying the webservice again.

我该怎么办呢？

推荐答案

我假设你存储从的WebService 在一个序列化对象检索的数据（如在规定您编辑它之前你的问题。）

I assume you're storing the data retrieved from WebService in a serializable object (as you stated in your question before you edited it.)

您可以存储序列化的对象到一个文件以后加载它们：

You can store serializable objects into a file and load them later:

存储：

FileOutputStream fileOutputStream = yourContext.openFileOutput(fileName, Context.MODE_PRIVATE);
ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream);
objectOutputStream.writeObject(yourObject);
objectOutputStream.close();

负载：

FileInputStream fileInputStream = yourContext.openFileInput(fileName);
ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
Object yourObject = (Object)objectInputStream.readObject();
objectInputStream.close();

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