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Modern Java Libraries with Kotlin
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Keisuke Kobayashi
May 24, 2017
Programming
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1.6k
Modern Java Libraries with Kotlin
potatotips #40
Keisuke Kobayashi
May 24, 2017
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Transcript
Modern Java Libraries with Kotlin Keisuke Kobayashi / @kobakei potatotips
#40
About me • Keisuke Kobayashi • GitHub, Qiita: @kobakei •
Twitter: @kobakei122 • Kyash, Inc
None
ࠓ͢͜ͱ • ݪଇJavaϥΠϒϥϦKotlinͰ େମͦͷ··͑·͢ • Ұ෦ಛผʹରԠ͕ඞཁͳͷΛհ͠·͢
Dagger2 + Orma
Dagger2 + Orma • kaptͰࣗಈੜ͞ΕΔΫϥεDaggerͰ provideͰ͖ͳ͍ • ͭ·ΓOrmaDatabase
NG: Ϗϧυ͕௨Βͳ͍ @Module class AppModule(private val context: Context) { @Singleton
@Provides fun provideOrmaDatabase(context: Context): OrmaDatabase { return OrmaDatabase.builder(context).build() } }
ղܾࡦ • OrmaDatabaseΛϥοϓ͢Δ͚ͩͷΫϥεΛ ࡞ͬͯɺͦΕΛprovide͢Δ
OrmaHolder class OrmaHolder(val context: Context) { val ormaDatabase = OrmaDatabase.builder(context).build()
}
Dagger Module @Module class AppModule(private val context: Context) { @Singleton
@Provides fun provideOrmaHolder(context: Context): OrmaHolder { return OrmaHolder(context) } }
Data Binding
Data binding • dependenciesʹkaptͰՃ android { dataBinding { enabled true
} } dependencies { kapt 'com.android.databinding:compiler:x.y.z' }
Parceler
Parceler • ParcelableͷϘΠϥʔϓϨʔτΛࣗಈੜ͢Δ ϥΠϒϥϦ • data classͰParcelerΛ͍͍ͨ
data class • toString, hasCodeͷ࣮ෆཁ data class User ( val
email: String?, val userName: String?, )
data class with Parceler • ͜Εͩͱಈ͔ͳ͍ʢϓϩύςΟ͋Δ͕ϑΟʔϧυ Ͱͳ͍ͨΊʣ @Parcel data class
User ( val email: String?, val userName: String?, )
data class with Parceler • ͜ΕͰϓϩύςΟܦ༝ͰಡΈॻ͖ͯ͘͠ΕΔ @Parcel(Parcel.Serialization.BEAN) data class User
@ParcelConstructor constructor( val email: String?, val userName: String?, )
͓·͚: αϯϓϧॻ͖·ͨ͠ • https://github.com/kobakei/Android-Kotlin- Example
Thanks!