Android Architecture Components meets Data Binding : Lifecycle awareness!

Finally Android Data Binding library got updated to play nice with Android Architecture Components library and became life-cycle aware! This means that any changes to the LiveData objects will be reflected in the layouts... automagically! :)
* Tested on Android Studio 3.1 - canary 6

Whats new?


To make the binding life-cycle aware you need to pass the life-cycle owner to the ViewDataBinding by calling the setLifecycleOwner method.

The ViewModel:

Our view model consists of the LiveData object that is simply and observable data container, where the observer gets notified of data changes.

The model:

Our model has one field that is used to store user's name. A POJO.

The layout:

-Out layout consists of a text field that is bound to the user's name. And will be updated when our LiveData container posts a change.
-We also have an EditText that is two-way bound to the user's name, meaning when text gets entered, the name is updated and vise-versa, when the user LiveDate is updated the EditText is updated.
-And finally a button onClick of which we post a change to our LiveData and all the observers get notified.

The result:



Resources:

  • Full source for the project: here




Comments

  1. harish kalyan17 September 2019 at 22:38

    Thank you for your efforts and I am inspiried with your written style.
    IELTS Coaching in Chennai
    Best IELTS Coaching centres in Chennai
    German Language Classes in Chennai
    Japanese Language Classes in Chennai
    Best Spoken English Classes in Chennai
    TOEFL Classes in Chennai
    content writing training in chennai
    IELTS Coaching in Tnagar
    IELTS Coaching in OMR

    ReplyDelete
  2. Unknown18 November 2019 at 11:50

    GTA 3 apk for android is one the popular game, the Grand theft auto 3 game on mobile are heavenly to play. For that, you need to download. Playing games has become an integral part of our daily life. There are games from various genres like action, adventure, strategic, puzzle, etc. There are many fans for action-adventure games.
    visit gta-3-apk

    ReplyDelete
  3. Aarthi Ramesh9 April 2022 at 00:53

    Nice blog, it is very impressive.

    Kotlin Android Training in Chennai
    Kotlin Online Training
    Kotlin Course in Bangalore

    ReplyDelete

Post a Comment

Popular posts from this blog

Building a Cryptocurrency with Kotlin : Part 1

Image
Kotlin has been becoming more and more mature with every release. We arguably have the most concise modern programming language that currently exists. With language idioms like data classes, extensions, kotlin objects, delegated properties, lambdas and of course, the latest version of Kotlin adds coroutine support. Lets talk about Node.js for a second.  Node.js  helped us to create many amazing websites and services, and provides numerous modules to make our lives as developers easier. But just because a tool is good enough does not mean we should stop innovation there. Kotlin is now Node.js' competitor because Kotlin's powerful language idioms enable us to create a powerful and fast framework for building asynchronous servers and clients, called  Ktor . Lets go back in time for a moment. Back in 2008 a small C++ side project was started by Satoshi Nakamoto. This project would change the world for ever. 10 years later Bitcoin managed to inspire dozens of crypto curren...
Read more

Android Architecture Components : LiveData

Image
Live Data : Life-cycle aware Observables As an Android developer you often have to work with data that is dynamic and changing with user input, device configuration changes, or even time changes. On top of this as a developer you have to respect the life-cycle of an Activity of Fragment that contains this dynamically changing data: stop updates onStop() or onPause() and restart the updates onStart() and onResume() . Examples of this is location data, countdown timers, user's list selections and any other type of dynamically changing data. Lets see how we can make these tasks easier using LiveData . We will demonstrate LiveData by creating a self contained timer. Subclass LiveData LiveData object is set active when the observer's lifecycle is stated or resumed . And the LiveData object is set inactive when the observer's lifecycle is stopped or pause . In our TimerLiveData we start timer when  onActive() is called and stop the timer when  onInactive() ...
Read more