ROOM
Room is a library that simplifies the work with the android SQLite database. It is a higher-level abstraction interface that allows you to reduce the amount of code, make it cleaner, and simplify your work.
With Room, developers don't need to spend a lot of time describing fundamental interactions, such as SQL queries, inside the application. Just add the necessary library components and you'll have ready-made tools that are much easier and faster to work with.
Room is one of the basic libraries, without which it is not recommended to start working on an android project at all. It is included in Jetpack, a list of popular and frequently used libraries. The purpose of the "starter kit" is to help you write less code, make it consistent with current OS versions and methodologically correct. In general, it contains everything that is critical to simplify the work of Room, including.
Room is a database wrapper for SQLite. It is at the same time an access point to the database, entity storage tables for it, and a set of methods for working with it. Room makes it much easier to query, update, transfer, and delete data from SQLite.
One of the main advantages of Room is the ability to use it as a storage library. For example, you can use it to cache data to display it even if the device is not connected to the Internet. This feature will also be useful for solving other tasks. In general, Room makes it easier to organize and interact with data.
Room checks SQL queries at compile time, optimizes database migration paths, and helps improve repetitive and error-prone boilerplate code. It can be integrated with RxJava and other similar libraries to create and process event sequences. This will allow you to receive notifications about changes in each of the places where they occurred. In general, your project code will become more structured and your processes will become more controlled.
Room is a development standard for Android. If you start writing an application in Kotlin or another language supported by the system, this library is used by default.
The only case when Room is not needed is when you are finalizing an already functioning large-scale project. In this case, the cost of migration will be higher than the cost of continuing to work in the old mode.
Without Room, interacting with SQLite directly requires much more time, both for writing code and for identifying errors. This library is a Google development, the use of which is considered one of the best practices and is highly recommended for all projects.
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