Cache files for offline usage

I am building the android app which uses box-content and box-preview api's, as box-preview api allows cache policy i want to use that and cache the files for offline purpose. But i can't find any documentation for the same nor the example.

Can anyone help me with how can i use the api to cache the file for offline usage. Also how to read the cached file.

Start with the Android Preview SDK's cache-policy API and the Box Content and Preview APIs named in the issue. Document an example showing how to cache files for offline use and how to read the cached file, with the result confirmed in an Android app.

Written by the indexing model from the issue text.