App Check List Use Single Activity and multiple Fragment. ☑ Fetch post from provided url [use retrofit] and store them inside your local database.[use room db.] ☑ Display your local database posts in a list using RecyclerView. ☑ In Your recyclerView layout display only title of the post. ☑ Clicking on a post It should display whole post contents in a separate fragment. ☑ Now Create a accessibility service and display a toast "WhatsApp Launched." , when user open whatsApp. ☑ Optionally You can add a button somewhere in your Activity Layout for accessibility permission. ☑