Room Advanced - 2 (DB)

 

id 'kotlin-kapt'

		// ROOM
    implementation "androidx.room:room-runtime:2.5.0"
    kapt "androidx.room:room-compiler:2.5.0"

    // optional - Kotlin Extensions and Coroutines support for Room
    implementation "androidx.room:room-ktx:2.5.0"

    // viewModel coroutine
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1"

    // byViewModels
    implementation 'androidx.activity:activity-ktx:1.6.1'

    // liveData
    implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.5.1"

 

	@Database(entities = [NumberEntity::class], version = 1)
	abstract class MyDatabase : RoomDatabase() {
	abstract fun numberDao() : NumberDao
	companion object {
	@Volatile
	private var INSTANCE : MyDatabase? = null
	fun getDatabase(
	context: Context
	) : MyDatabase {
	return INSTANCE ?: synchronized(this) {
	val instance = Room.databaseBuilder(
	context.applicationContext,
	MyDatabase::class.java,
	"number_database"
	)
	.fallbackToDestructiveMigration()
	.build()
	INSTANCE = instance
	instance
	}
	}
	}
	}

view raw MyDatabase.kt hosted with ❤ by GitHub

	@Entity(tableName = "number_table")
	data class NumberEntity (
	@PrimaryKey(autoGenerate = true)
	@ColumnInfo(name = "id")
	var id : Int = 0,
	@ColumnInfo(name = "randomNumber")
	var randomNumber : String
	)

view raw NumberEntity.kt hosted with ❤ by GitHub

	@Dao
	interface NumberDao {
	@Insert(onConflict = OnConflictStrategy.IGNORE)
	fun create(numberEntity: NumberEntity)
	@Query("SELECT * FROM number_table")
	fun read() : Flow<List<NumberEntity>>
	@Update
	fun update(numberEntity: NumberEntity)
	@Delete
	fun delete(numberEntity: NumberEntity)
	}

view raw NumberDao.kt hosted with ❤ by GitHub