Precaching online content on Android App for offline usage I would like to read the Stack Exchange Android app while offline (no Wi-Fi and mobile data) during my train commute.

Is it possible to preload any pages and read those, like we do with a web browser, visit the pages when you have the Wi-Fi connection, and while offline you can go back to that page and it's loaded?

Is there a workaround like that for the Stack Exchange app?
Well for offline mode, try using Pocket - Read It Later
For example, when you want to read any article from browser, just click on share and select "Pocket"and then you can read it whenever you want (even in offline mode)