Android is like a kind of pull down to refresh pull-up load with connotation jokes, which continuously acquires new data and will not repeat.

  android, question

For example: Android is like a kind of connotation jokes. pull down to refresh pulls up and loads continuously to get new data, and will not repeat it.

When you pull to make a request, just return the id or timestamp of the latest one as the request parameter, and then the server will check the id and return it.