There are a lot blog posts about making apps - but rarely some about making widgets. This one explains the basics and tells you about the things to look out for and some caveats when developing a widget.
Google open sourced a trivia game app for the Google Assistant, and now you get to see the design and logic that makes it all work using Actions on Google, the development platform for the Google Assistant.
Peer to Peer video calling is on the rage for sometime and now every app has audio/video calling inbuilt. This tutorial series is all about exploring the possibility of providing such feature in an easy and understandable manner for beginners.
In this tutorial, you'll learn about the cool new SMS token feature in Android O. You'll learn how to generate an app-specific token that will fire up a pending intent when the device first receives a message containing that token so as to verify the phone number.
With Android O changes are coming how you start background tasks. One of the main differences is that a Started Service that does not have a persistent notification won’t be allowed to run in the background when the Activity goes away. In this post you'll learn how to implement background tasks the right way in Android O.
In this post by Bakhtar Sobat you'll learn how to use ResultReceiver to get results from an IntentService. An IntentService is a base class for services that handles asynchronous requests (expressed as Intents) on demand. It's a common pattern to offload work from the main thread - but passing data around can be a bit tedious.
So - you want to land your dream job as an Android developer then you should take a look at these questions. I admit many of them are knitpicking niche topics and probably (to stand an interview) you must not now everything - but it's a great compilation anyways.