Where to start implementing an Android application?

Question

Android

You need an application that will constantly (every second) check with the server (or as an option once a day), an analogue - the exchange rate, or information about the weather at the moment. What are the best protocols to use? What is the best way to implement it?

Answer 1

If every second, you should look towards sockets, and if once a day, an http request is enough.
First, implement a bunch of UI thread and work in the background thread.