Room + ViewModel + LiveData + RecyclerView (MVVM) Part 2 - ENTITY - Android Studio Tutorial

In part 2 of the Architecture Components tutorial, we will set up a new Android Studio project, add the Room and Lifecycle dependencies and then create our Note class.nBy annotating this Java class with @Entity, we can let room generate all the necessary code to create an SQLite table for this object, as well as columns for all it's fields. With @PrimaryKey and autoGenerate = true, we can turn an integer member variable into an autoincrementing primary key, which we can use to uniquely identify each row in the table. In the past we would have to do all of this in an SQLiteOpenHelper with plain SQL statements. nLastly we create a constructor, getters and setters and then Room takes care of creating all the boilerplate code at runtime. We can also specify the tableName if it should be different than the class name.nThere are some more annotations and settings, like @Ignore and @ColumnInfo, which you can learn more about in the documentation below.nnWatch the whole playlist:nwww.youtube.com/playlist?list=PLrnPJCHvNZuDihTpkRs6SpZhqgBqPU118nnExample code, dependencies & instructions:ncodinginflow.com/tutorials/android/room-viewmodel-livedata-recyclerview-mvvm/part-2-entitynnAndroidX refactoring table:ndeveloper.android.com/topic/libraries/support-library/refactornnEntity documentation:ndeveloper.android.com/training/data-storage/room/defining-datann____________________nSubscribe to my channel:nwww.youtube.com/c/codinginflow?sub_confirmation=1nnWant more Android tutorials? Check my playlist section:nwww.youtube.com/c/codinginflow/playlistsnnnFollow me on social media:nnFacebook:nwww.facebook.com/codinginflownnInstagram:nhttps://www.instagram.com/codinginflownnTwitter:nhttps://twitter.com/codinginflownnBlog:nhttps://codinginflow.com/

Category : Компьютерные игры

#room#+#viewmodel#livedata#recyclerview#mvvm#part#2#entity#android#studio#tutorial