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ViewModel and View communication (source)

Introduction

There’s been a lot of talk about MVVM architecture since Google announced architecture components last year at I/O and so many developers who preferred Presenters (including me) have started to accept the ViewModel world. Using ViewModels (over Presenters) reduces boilerplate code, manages data during configuration change, makes it easy to share data between multiple fragments. However, it does make communication with Views much harder.

Problem

Let’s take an example of Edit Profile screen. User data must be validated before sending to server, which means Presenter/ViewModel should be able to show/hide progress indicator, send validation and server errors (if any) to the…

Shashank Gupta

Android Architect + UI/UX Enthusiast = Product Engineer

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