Java.Time.LocalDateTime Converter For Room (Kotlin)

April 14, 2018

Create converter for java.time.LocalDateTime to epoch milli seconds.

class Converters {
    @TypeConverter
    fun fromTimestamp(value: Long?): LocalDateTime? {
        return value?.let { LocalDateTime.ofInstant(Instant.ofEpochMilli(value), ZoneOffset.UTC) }
    }

    @TypeConverter
    fun dateToTimestamp(date: LocalDateTime?): Long? {
        return date?.atZone(ZoneOffset.UTC)?.toInstant()?.toEpochMilli()
    }
}

@Database(...)
@TypeConverters(Converters::class)
abstract class AppDatabase : RoomDatabase() {
    ...
}

By Desmond Lua

A dream boy who enjoys programming and travelling, maker of Travelopy. Follow me on @d_luaz.

Tags:

Android Room Database Migration Instrumented Unit Test (Kotlin)

Android Room Database Migration (Upgrade Version) - Kotlin

Android Time Picker Dialog With Java Time (Kotlin)

Android Date Picker Dialog With Java Time (Kotlin)

Guide to learning Android Dev with Kotlin and Architecture Components (ViewModel, LiveData and Room)

Android Room Insert or Update

Android Room Use Nullable Variable for Embeded

Android Instrumented Unit Test With Room Using In Memory Database And LiveData

Android Get System Default Timezone with Java Time

Android Convert Room LiveData Async to Sync

Android Room Add Unique Contraint to Table (Kotlin)

Android Store LocalDateTime in SharedPreferences

Android Room Database Transaction

Android Read Exif Date as LocalDateTime

Android Room Batch Insert Or Update (Kotlin)

Access Android Room Database Version At Runtime