How to create a new article on an already published android app -

i've created android app i've published articles in form of list. when user clicks list item, open new activity. activity open article using webview. far i've created 40 list items , 40 activities related each list.

my question , once publish app if need add new article through activity possible. if no how news apps publish new articles daily?

apps cnn or whatever news app client apps getting push api calls server read-only privileges. author of articles, write content on database , serve restful api (or firebase database). hint: checkout firebase's suites of tools.