No more Adapter with Epoxy and Data Binding

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No more Adapter with Epoxy and Data Binding @takuji31 ژ౎Dev͔;͐ #5

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ࣗݾ঺հ

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ࣗݾ঺հ • @takuji31 id:takuji31 • Takuji Nishibayashi • Hatena Co., Ltd. • App Team • δϟϯϓϧʔΩʔʂ • ίϛοΫDAYS • ΧΫϤϜ

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ࣗݾ঺հ • Android • Kotlin • ! https://blog.takuji31.jp • " https://nazuna.takuji31.jp • # $ https://photo.takuji31.jp

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RecyclerView

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࢖ͬͯͳ͍ਓ͍·ͤΜΑͶʁ

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ViewHolder + Adapter

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ΦϓγϣϯͰ DiffUtil

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blog.takuji31.jp/entry/kanmoba17

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ෳࡶͳը໘

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No content

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Ͳ͏࣮ݱ͢Δʁ

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खͰؤுΔ

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ViewHolderΛview type͝ͱʹ࡞Δ

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onCreateViewHolderͰ֘౰͢Δ ViewHolderΛ࡞Δ

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onBindViewHolderͰViewHolderͷ ܕΛݟͯ஋Λઃఆ

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มߋݕ஌

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DiffUtilͰؤுΔ

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Section Library

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※ ͍͔ͭ͘ϥΠϒϥϦʔ͕͋Γ·͢ ͕Ұൠతͳ࿩Ͱ͢

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view typeͷ୅ΘΓʹSectionͱ͍͏ ΫϥεΛ࢖͏

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Section class WorkSection(val items:List): Section() { override fun onCreateViewHolder(inflator: LayoutInflator, parent: ViewGroup): WorkViewHolder { return WorkViewHolder(inflator.inflate(R.layout.recycle_item_work, parent, false)) } override fun onBindViewHolder(viewHolder: WorkViewHolder, position: Int) { val work = items[position] viewHolder.title = work.title Picasso.get().load(work.imageUri).into(viewHolder.imageView) } }

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Adapter val adapter = Adapter() adapter.addSection(BannerSection(works)) adapter.addSection(WorkSection(works.take(10))) adapter.addSection(EntrySection(works)) adapter.addSection(WorkSection(works.drop(10)))

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ύοͱݟ؆୯ͦ͏

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ΫϦοΫΠϕϯτͷ఻ୡͲ͏͢Δ…ʁ class WorkSection(val items:List, val onClick: (Work) -> Unit): Section() { override fun onCreateViewHolder(inflator: LayoutInflator, parent: ViewGroup): WorkViewHolder { return WorkViewHolder(inflator.inflate(R.layout.recycle_item_work, parent, false)) } override fun onBindViewHolder(viewHolder: WorkViewHolder, position: Int) { val work = items[position] viewHolder.title = work.title Picasso.get().load(work.imageUri).into(viewHolder.imageView) viewHolder.itemView.setOnClickListener { onClick() } } }

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Adapter val adapter = Adapter( {work -> viewModel.onWorkSelected(work)}, {entry -> viewModel.onEntrySelected(entry)}, {banner -> viewModel.onBannerSelected(banner)}, ) adapter.addSection(BannerSection(works)) adapter.addSection(WorkSection(works.take(10))) adapter.addSection(EntrySection(works)) adapter.addSection(WorkSection(works.drop(10)))

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ͪΐͬͱ໘౗

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ͦ΋ͦ΋

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Adapter -> Section -> ViewHolder

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֊૚͕૿͑Δ

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ঢ়ଶΛόϥόϥʹ͍࣋ͬͯͨΓ͢Δ ͱ෮ݩͰࢮ͵

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Ϋϥε਺૿͑Δ

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ॳݟͰΊͬͪΌΉ͍ͣ

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Epoxy

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github.com/airbnb/epoxy

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No more

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ViewHolder

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notifyDataSetChanged()

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Adapter

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Carousel support

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Data Binding Friendly

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Kotlin DSL support!!!

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build.gradle dependencies { implementation "com.airbnb.android:epoxy:3.3.0" implementation "com.airbnb.android:epoxy-databinding:3.3.0" kapt "com.airbnb.android:epoxy-processor:3.3.0" }

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package-info.java @EpoxyDataBindingPattern(rClass = R.class, layoutPrefix = "recycler") package jp.takuji31.epoxyexample; import com.airbnb.epoxy.EpoxyDataBindingPattern;

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recycler_item_work.xml

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Activity or Fragment recyclerView.withModels { works.forEach { work -> itemWork { id("work_${work.id}") work(work) } } }

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No content

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Carousel

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Carousel recyclerView.withModels { carousel { id("entryCaroucel") withModelsFrom(entries) { entry -> ItemEntryBindingModel_() .id("entry_${entry.id}") .entry(entry) } } }

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No content

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؆୯͗͢Ͱ͸

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ෳࡶͳϨΠΞ΢τ

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ෳࡶͳϨΠΞ΢τ Carousel.setDefaultGlobalSnapHelperFactory(null) carousel { id("bannerCarousel") withModelsFrom(banners) { ItemBannerBindingModel_() .id("banner_${it.id}") .banner(it) } } works.take(10).forEach { work -> itemWork { id("work_${work.id}") work(work) } }

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ෳࡶͳϨΠΞ΢τ headerBlogEntry { id("blog_header") } carousel { id("entryCaroucel") withModelsFrom(entries) { entry -> ItemEntryBindingModel_() .id("entry_${entry.id}") .entry(entry) } } works.drop(10).forEach { work -> itemWork { id("work_${work.id}") work(work) } }

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׬੒ʂ

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https://github.com/takuji31/epoxyexample

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Enjoy RecyclerView life

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! ࠾༻৘ใ

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גࣜձࣾ͸ͯͳͰ͸ɺ ͱ΋ʹʮ௅ઓʯͰ͖Δ ஥ؒΛืू͍ͯ͠·͢

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͜ΜͳਓΛ୳͍ͯ͠·͢ • AndroidΞϓϦΛ࡞Γ͍ͨਓ • iOSΞϓϦΛ࡞Γ͍ͨਓ • ͋Δ͍͸྆ํ • ͳΜͳΒαʔόʔαΠυ΋

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https://hatenacorp.jp/recruit/