vprabhu

var mTodoTaskList : LiveData<List<TodoTask>> = mDatabase.todoTaskDao().getallTasks()
            mTodoTaskList.observe(
                    this ,
                    Observer<List<TodoTask>>() {
                        Log.d("List" , it?.size.toString())
                        if (it != null) {
                            mTodoTaskAdapters = TodoTaskAdapters(this , it)
                            mTaskRecyclerView.layoutManager = LinearLayoutManager(
                                    this.applicationContext ,
                                    LinearLayout.VERTICAL , false)

vprabhu

@Dao
interface TodoTaskDao {

    @Query("select * from todotasks order by id")
    fun getallTasks(): LiveData<List<TodoTask>>

    @Insert
    fun insertTodoTask(todoTask: TodoTask)

    @Update(onConflict = OnConflictStrategy.REPLACE)

vprabhu

implementation "android.arch.lifecycle:extensions:1.1.0"
annotationProcessor "android.arch.lifecycle:compiler:1.1.0"

vprabhu

@Database(entities = arrayOf(TodoTask::class), version = 1, exportSchema = false)
@TypeConverters(DataConverter::class)
abstract class AppDatabase : RoomDatabase() {

    abstract fun todoTaskDao(): TodoTaskDao

    companion object {

        private val LOCK = Any()
        private val DATABASE_NAME = "todotaskList"

vprabhu

object DateConverter {

    @TypeConverter
    fun toDate(timestamp: Long?): Date? {
        return if (timestamp == null) null else Date(timestamp)
    }

    @TypeConverter
    fun toTimestamp(date: Date?): Long? {
        return date?.time

vprabhu

@Dao
interface TodoTaskDao {

    @Query("select * from todotasks order by id")
    fun getallTasks(): List<TodoTask>

    @Insert
    fun insertTodoTask(todoTask: TodoTask)

    @Update(onConflict = OnConflictStrategy.REPLACE)

vprabhu

@Entity(tableName = "todotasks")
class TodoTask(@field:PrimaryKey(autoGenerate = true)
               var id: Int, var name: String?, @field:ColumnInfo(name = "due_date")
               var dueDate: Date?)

vprabhu

compile "android.arch.persistence.room:runtime:1.0.0"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0"

vprabhu

vprabhu

LoadersDemo