Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
GDG Android - Android Adapter 어떻게 사용하는게 좋을까?
Search
TaeHwan
February 03, 2018
Programming
2
24k
GDG Android - Android Adapter 어떻게 사용하는게 좋을까?
2018/02/02 GDG Android Lightning Talk Announcement
TaeHwan
February 03, 2018
Tweet
Share
More Decks by TaeHwan
See All by TaeHwan
Compose 함수 나누는 조건은?
taehwandev
0
1.8k
Android MVVM 패턴의 접근법 - 2023 드로이드 나이츠
taehwandev
1
1.8k
안드로이드의 변화 - IO Extended 2023 - 송도
taehwandev
0
620
What’s new in Android?(Google IO ex 23-GDG Pangyo)
taehwandev
0
890
Jetpack Compose 상태 및 사이드 효과
taehwandev
0
1.2k
GDG DevFest2022 Songdo - KMM(Kotlin Multiplatform Mobile)
taehwandev
0
620
Kotlin Night 2022 - 코틀린 어노테이션으로 할 수 있는 것(GDG Seoul)
taehwandev
2
1.6k
Android module 개발 - Now in android 참고
taehwandev
3
17k
Android Compose Component - mapping.
taehwandev
2
4.8k
Other Decks in Programming
See All in Programming
Design Foundational Data Engineering Observability
sucitw
3
200
AIでLINEスタンプを作ってみた
eycjur
1
230
プロパティベーステストによるUIテスト: LLMによるプロパティ定義生成でエッジケースを捉える
tetta_pdnt
0
330
実用的なGOCACHEPROG実装をするために / golang.tokyo #40
mazrean
1
270
MCPでVibe Working。そして、結局はContext Eng(略)/ Working with Vibe on MCP And Context Eng
rkaga
5
2.3k
🔨 小さなビルドシステムを作る
momeemt
4
680
概念モデル→論理モデルで気をつけていること
sunnyone
1
130
「待たせ上手」なスケルトンスクリーン、 そのUXの裏側
teamlab
PRO
0
520
Navigating Dependency Injection with Metro
zacsweers
3
260
Android 16 × Jetpack Composeで縦書きテキストエディタを作ろう / Vertical Text Editor with Compose on Android 16
cc4966
1
220
Introducing ReActionView: A new ActionView-compatible ERB Engine @ Rails World 2025, Amsterdam
marcoroth
0
690
基礎から学ぶ大画面対応(Learning Large-Screen Support from the Ground Up)
tomoya0x00
0
450
Featured
See All Featured
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
285
13k
Unsuck your backbone
ammeep
671
58k
The Cult of Friendly URLs
andyhume
79
6.6k
Designing Experiences People Love
moore
142
24k
The Cost Of JavaScript in 2023
addyosmani
53
8.9k
Java REST API Framework Comparison - PWX 2021
mraible
33
8.8k
Principles of Awesome APIs and How to Build Them.
keavy
126
17k
The Pragmatic Product Professional
lauravandoore
36
6.9k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
333
22k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
162
15k
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
Transcript
Adapter যڌѱ Ӕೞݶ જਸө? Taehwan
ViewModel ਊೞৈ ܻ࠙ೞӝ
ೞ݅ ৈӝࢲࠗఠ द — SeongUg Steve Jung(GDE) : Adapter, ־ҳջ
ք? — Data? View?
Adapter ۧѱ ҳࢿغযભ?
ۧѱ ࢎਊೞભ? class SimpleAdapter(private val context: Context, private val list:
ArrayList<String>) : RecyclerView.Adapter<SimpleAdapter.ViewHolder>() { override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): SimpleAdapter.ViewHolder { return ViewHolder(LayoutInflater.from(context).inflate(R.layout.item_text_sample, parent)) } override fun getItemCount() = list.size override fun onBindViewHolder(holder: SimpleAdapter.ViewHolder?, position: Int) { holder?.itemView?.run { tv_message.text = "Set TEXT" } } class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) }
N ѐ ViewHolderо ਃೞ class ViewHolderOne(itemView: View) : RecyclerView.ViewHolder(itemView) class
ViewHolderTwo(itemView: View) : RecyclerView.ViewHolder(itemView) class ViewHolderThree(itemView: View) : RecyclerView.ViewHolder(itemView)
N ѐ ViewHolderо ਃೞ class SimpleAdapter(private val context: Context, private
val list: ArrayList<String>) : RecyclerView.Adapter<RecyclerView.ViewHolder>() { override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): RecyclerView.ViewHolder { return when (viewType) { TYPE_ONE -> ViewHolderOne(LayoutInflater.from(context).inflate(R.layout.item_text_sample, parent)) } } override fun onBindViewHolder(holder: RecyclerView.ViewHolder?, position: Int) { when (holder) { is ViewHolderOne -> { holder.itemView?.run { tv_message.text = "ViewHolder One" } } } } override fun getItemViewType(position: Int): Int { return when (position) { else -> TYPE_ONE } } }
ViewHolder по ܻೞب۾ abstract class BaseViewHolder<in ITEM : Any>( val
context: Context, @LayoutRes layoutRes: Int, parent: ViewGroup?) : RecyclerView.ViewHolder(LayoutInflater.from(context).inflate(layoutRes, parent, false)) { fun onBindViewHolder(item: Any?) { try { onViewCreated(item as? ITEM?) } catch (e: Exception) { itemView.visibility = View.GONE } } abstract fun onViewCreated(item: ITEM?) }
BaseRecyclerAdapterীࢲب ਃۧѱ abstract class BaseRecyclerAdapter(val context: Context?) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
override fun onBindViewHolder(holder: RecyclerView.ViewHolder?, position: Int) { (holder as? BaseViewHolder<*>)?.onBindViewHolder(getItem(position)) } // ࢤۚ }
MVP ܻ࠙о оמೠо? थש Ӗী ٮܲ ܻ࠙ — ViewHolder :
Viewਸ Ӓܻח ೡ݅ — View : Viewী ೠ interface — Model : Modelী ೠ interface -> Adapter : ୡӝച ߂ View/Model interface ࢚ࣘਸ ҳഅ -> ৻ࠗ Presenterীࢲ пп interface ഐ
ܻ࠙о оמೠо? interface ImageViewAdapterContract { interface View { val onItemTouchListener:
OnItemTouchListener? fun reload() } interface Model { fun addItem(item: RecentPhotoItem?) fun getItem(position: Int): RecentPhotoItem fun clear() } }
ܻ࠙о оמೠо? class ImageAdapter(private val context: Context) : RecyclerView.Adapter<BaseViewHolder<RecentPhotoItem>>(), ImageViewAdapterContract.View,
ImageViewAdapterContract.Model { val itemList: ArrayList<RecentPhotoItem> = ArrayList() override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int) = when (viewType) { VIEW_TYPE_ASYNC -> ImageAsyncViewHolder(context, parent, onItemTouchListener) } override fun onBindViewHolder(holder: BaseViewHolder<RecentPhotoItem>?, position: Int) { holder?.bindView(getItem(position), position) } override fun getItemViewType(position: Int) = getItem(position).viewType override fun addItem(item: RecentPhotoItem?) { item?.let { itemList.add(it) } } override fun getItem(position: Int) = itemList[position] override fun reload() { notifyDataSetChanged() } }
Ӓ۞ݶ ViewModel۽ ֈযо ࠁ
ViewModelਸ بੑ೧ࠅө? — ѱ ׳ۄח ࠗ࠙ হ݅ ViewModel۽ ҳࢿೞҊ र
— Adapterীࢲח onCreateViewHolder݅ ೞҊ र — BaseAdapter ݅ ੜ೧ࢲ ܻೞҊ र — Modelਸ ߹ب۽ ҙܻೠ -> Adapter ೡ ߹Ѣ হ
ViewModel ੌױ ٜ݅ interface BaseAdapterNavigator { fun getItemViewType(position: Int): Int
fun addItem(item: Any?, viewType: Int) fun clear() fun getItemCount(): Int }
ViewModel ੌױ ٜ݅ open class BaseAdapterViewModel(override val context: Context?) :
BaseAdapterNavigator { protected val itemList = mutableListOf<Pair<Any?, ViewHolderSealedData>>() override fun getItemViewType(position: Int): Int { val item = getPairItem(position) return when (item) { is ViewHolderInfo -> item.viewType else -> -1 } } override fun addItem(item: Any?, viewType: Int) { itemList.add(Pair(item, ViewHolderInfo(viewType))) } override fun clear() { itemList.clear() } override fun getItemCount() = itemList.size }
item ਬোೠ ࢎਊਸ ਤ೧ ViewType/ӝఋ ࠁܳ ਬোೞѱ о۰Ҋ, ইې sealed
class sealed class ViewHolderSealedData data class ViewHolderInfo( val viewType: Int) : ViewHolderSealedData()
Adapterীࢲ Model ܳ ܻ࠙ — Adapterীࢲ Model ܻ࠙ —
Adapterח ԇؘӝܳ ࢤࢿೞח ೡ ࠗ (onCreateViewHolder) — ViewHolderীࢲب BaseAdapterNavigatorਸ ా೧ࢲ Ӕ — ߡౡ ܼ द Navigator ܳ ా೧ Ӕ — ਃী ٮۄ Adapter ӝࠄ ViewModel ೧ࢲ ࢎਊ
Adapter ୡӝചח? private val adapter: BaseRecyclerAdapter by lazy { object
: BaseRecyclerAdapter(this, BaseAdapterViewModel(this)) { override fun onCreateViewHolder( parent: ViewGroup?, viewType: Int): RecyclerView.ViewHolder { // ࢤۚ } } }
؊ જ ߑध Adapter Ӕߨ? — Adapter ࢚ࣘ ҳഅਸ ୭ࣗച
दఃӝ ਤೣ — ViewModel ୡӝച݅ ೞৈ ࢎਊ оמ — ViewHolderীࢲח View ೡ݅ ೞب۾ ܻ -> ߈ࠂ ٬ਸ ӝ ਤೣ