Modern Java Libraries with Kotlin

potatotips #40

Transcript

1. Modern Java Libraries with Kotlin Keisuke Kobayashi / @kobakei potatotips #40
2. About me • Keisuke Kobayashi • GitHub, Qiita: @kobakei • Twitter: @kobakei122 • Kyash, Inc
4. ࠓ೔࿩͢͜ͱ • ݪଇJavaϥΠϒϥϦ͸KotlinͰ΋
 େମͦͷ··࢖͑·͢ • Ұ෦ಛผʹରԠ͕ඞཁͳ΋ͷΛ঺հ͠·͢
5. Dagger2 + Orma
6. Dagger2 + Orma • kaptͰࣗಈੜ੒͞ΕΔΫϥε͸DaggerͰ provideͰ͖ͳ͍ • ͭ·ΓOrmaDatabase
7. NG: Ϗϧυ͕௨Βͳ͍ @Module class AppModule(private val context: Context) { @Singleton @Provides fun provideOrmaDatabase(context: Context): OrmaDatabase { return OrmaDatabase.builder(context).build() } }
8. ղܾࡦ • OrmaDatabaseΛϥοϓ͢Δ͚ͩͷΫϥεΛ ࡞ͬͯɺͦΕΛprovide͢Δ
9. OrmaHolder class OrmaHolder(val context: Context) { val ormaDatabase = OrmaDatabase.builder(context).build() }
10. Dagger Module @Module class AppModule(private val context: Context) { @Singleton @Provides fun provideOrmaHolder(context: Context): OrmaHolder { return OrmaHolder(context) } }
11. Data Binding
12. Data binding • dependenciesʹkaptͰ௥Ճ android { dataBinding { enabled true } } dependencies { kapt 'com.android.databinding:compiler:x.y.z' }
13. Parceler
14. Parceler • ParcelableͷϘΠϥʔϓϨʔτΛࣗಈੜ੒͢Δ ϥΠϒϥϦ • data classͰParcelerΛ࢖͍͍ͨ
15. data class • toString, hasCodeͷ࣮૷ෆཁ data class User ( val email: String?, val userName: String?, )
16. data class with Parceler • ͜Εͩͱಈ͔ͳ͍ʢϓϩύςΟ͸͋Δ͕ϑΟʔϧυ Ͱ͸ͳ͍ͨΊʣ @Parcel data class User ( val email: String?, val userName: String?, )
17. data class with Parceler • ͜ΕͰϓϩύςΟܦ༝ͰಡΈॻ͖ͯ͘͠ΕΔ @Parcel(Parcel.Serialization.BEAN) data class User @ParcelConstructor constructor( val email: String?, val userName: String?, )
18. ͓·͚: αϯϓϧॻ͖·ͨ͠ • https://github.com/kobakei/Android-Kotlin- Example
19. Thanks!