Android Architecture Component – Introduction to Room Persistence Library


Android Architecture Component launched by Google I/O in November 2017 is an addition that improves the development process for Android applications. As developer.android.com defines it, “A collection of libraries that help you design robust, testable, and maintainable apps. Start with classes for managing your UI component lifecycle and handling data persistence.” The basic components of Android Architecture are Lifecycle, LiveData, ViewModel, Room Persistence Library.

Of the several components, one of the very interesting ones is the Room Persistence Library. What Room does is it helps a developer to replace complex SQLite queries with simple java objects. This means that it fetches the records from a table as class names and column data as class attributes. Therefore, it becomes easy for a developer to work seamlessly in the local and live server and makes the process of code integration easier. Room takes care of the tedious amount of code that you would need to write for SQL queries by replacing them with Java data objects and vice-versa.

ROOM is an ORM(Object-relational mapping) tool for Android which makes it an abstraction layer between SQLite and the Android application. Developers can use it as an Object Oriented Pattern. What DAO (Data Access Object) does is that it fetches object from the room database. Room then communicates with SQLite and fetches data from the physical storage. Lastly, the application receives data as an object of Model class. Thus, ROOM acts as a layer in between the SQLite and the App to make it easy to avoid boilerplate codes and make the app development process easier.

The addition of Room as an  Android Architecture Component will make the android app development process easy. For the android developers, it is indeed a good news as it cuts down on the need to write long codes. Room has proven to be an excellent addition to Android development since its launch four months back and will continue to benefit the developers across the globe.

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