Get a Room - Android Architecture Component

This presentation talks about room which is one of the new android architecture component that Google introduce in the mid of Google I/O 2017.
The Room persistence library provides an abstraction layer over SQLite to allow fluent database access while harnessing the full power of SQLite.

Transcript

1. Get a “Room” Android Architecture Component
2. • Object mapping library for persisting data with SQLite From the documentation : “Room provides an abstraction layer over SQLite to allow fluent database access while harnessing the full power of SQLite.” What is Room ?
3. Why Room ? ➔ Compile-time verification of SQL queries ➔ Less boilerplate code ➔ High degree of testability ➔ Full integration with other android architecture ➔ Support RxJava
4. Basic of room . . .
5. Room Components Source : https://developer.android.com/training/data-storage/room/index.html
6. @Entity Represents a table within the database. User.kt data class User ( val uid: Int; val name: String; val age: Int; val relationship: String; ) @Entity(tableName= “user”) data class User ( @PrimaryKey val uid: Int; @ColumnInfo(name=”fullname”) val name: String; val age: Int; @Ignore val relationship: String; )
7. Room Components Source : https://developer.android.com/training/data-storage/room/index.html
8. @Dao Contains the methods used for accessing the database. Annotation for Dao @Insert @Update @Delete @Query UserDAO.kt @Dao interface UserDao { @Insert() fun insertUser(user: User) @Update(onConflict = REPLACE) fun insertUser(user: User) @Query("SELECT * FROM user) fun getAllUser(): List<User> }
9. Room Components Source : https://developer.android.com/training/data-storage/room/index.html
10. Database Contains the database holder and serves as the main access point for the underlying connection to your app's persisted, relational data. MyDatabase.kt @Database(entities = {User.class}, version = 1) abstract class MyDatabase: RoomDatabase() { abstract userDao(): UserDao } myDatabase = Room.databaseBuilder(context, MyDatabase::class.java, DB_NAME).build() myDatabase = Room.inMemoryDatabaseBuilder(context, MyDatabase::class.java).build()
11. How to use it ? ➔ Add dependencies ➔ Create Entity ➔ Create DAO ➔ Create Database ➔ Test it
12. Step #1 - add dependencies Add the Google Maven repository - build.gradle(project) maven { url 'https://maven.google.com' } Room - build.gradle(app) compile "android.arch.persistence.room:runtime:1.0.0" kapt "android.arch.persistence.room:compiler:1.0.0" Room Testing support - build.gradle(app) androidTestCompile "android.arch.persistence.room:testing:1.0.0" Room RxJava support (optional) - build.gradle(app) compile "android.arch.persistence.room:rxjava2:1.0.0"
13. Demo Time ➔ Go go go
14. Thank you ;) Sarah Melisa Polak BBM : shasapo Email : spolak@bbmtek.com