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CONFIDENTIAL
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w "OESPJEΤϯδχΞ
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BHFOEB
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w SFDZDMFSWJFXTFMFDUJPOͱʁ
w ͍ํ
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w 4FMFDUJPO5SBDLFSΛ࡞Δ
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BHFOEB
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SFDZDMFSWJFXTFMFDUJPO
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TVQQPSUMJCSBSZBMQIB͔Β
BMQIB͔Βಋೖ ͪΖΜQSFWJFXͰ͢
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લ४උ
data class Book(
val id: Long,
val title: String,
val subTitle: String
)
͜ͷ#PPLͷϦετΛෳબͰ͖ΔΑ͏ʹ͠·͢
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લ४උ
3FDZDMFS7JFXɺ7JFX)PMEFSɺ"EBQUFSҰ୴௨ৗ௨Γ
ͨͩɺTUBCMF*EΛ͏Α͏ʹ͢Δ
class BookAdapter(
context: Context,
private val bookList: List
) : RecyclerView.Adapter() {
init {
setHasStableIds(true)
}
:
override fun getItemId(position: Int): Long = bookList[position].id
:
}
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લ४උ
3FDZDMFS7JFXɺ7JFX)PMEFSɺ"EBQUFSҰ୴௨ৗ௨Γ
ͨͩɺTUBCMF*EΛ͏Α͏ʹ͢Δ
class BookAdapter(
context: Context,
private val bookList: List
) : RecyclerView.Adapter() {
init {
setHasStableIds(true)
}
:
override fun getItemId(position: Int): Long = bookList[position].id
:
}
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4FMFDUJPO5SBDLFSΠϯελϯεΛ࡞Δ
selectionTracker = SelectionTracker.Builder(
"my-selection-id",
binding.recyclerView,
StableIdKeyProvider(binding.recyclerView),
BookIdDetailsLookup(binding.recyclerView),
StorageStrategy.createLongStorage())
.withOnItemActivatedListener { item, e ->
Log.e("MainActivity", item.toString())
return@withOnItemActivatedListener true
}
.build()
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4FMFDUJPO5SBDLFSΠϯελϯεΛ࡞Δ
selectionTracker = SelectionTracker.Builder(
"my-selection-id",
binding.recyclerView,
StableIdKeyProvider(binding.recyclerView),
BookIdDetailsLookup(binding.recyclerView),
StorageStrategy.createLongStorage())
.withOnItemActivatedListener { item, e ->
Log.e("MainActivity", item.toString())
return@withOnItemActivatedListener true
}
.build()
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#VOEMFʹೖΕΔ,FZͱͯ͠ΘΕ·͢ɻ
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4FMFDUJPO5SBDLFSΠϯελϯεΛ࡞Δ
selectionTracker = SelectionTracker.Builder(
"my-selection-id",
binding.recyclerView,
StableIdKeyProvider(binding.recyclerView),
BookIdDetailsLookup(binding.recyclerView),
StorageStrategy.createLongStorage())
.withOnItemActivatedListener { item, e ->
Log.e("MainActivity", item.toString())
return@withOnItemActivatedListener true
}
.build()
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֘ͷ3FDZDMFS7JFXΛࢦఆ͢Δɻ
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4FMFDUJPO5SBDLFSΠϯελϯεΛ࡞Δ
selectionTracker = SelectionTracker.Builder(
"my-selection-id",
binding.recyclerView,
StableIdKeyProvider(binding.recyclerView),
BookIdDetailsLookup(binding.recyclerView),
StorageStrategy.createLongStorage())
.withOnItemActivatedListener { item, e ->
Log.e("MainActivity", item.toString())
return@withOnItemActivatedListener true
}
.build()
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© DMM.com X
4FMFDUJPO5SBDLFSΠϯελϯεΛ࡞Δ
selectionTracker = SelectionTracker.Builder(
"my-selection-id",
binding.recyclerView,
StableIdKeyProvider(binding.recyclerView),
BookIdDetailsLookup(binding.recyclerView),
StorageStrategy.createLongStorage())
.withOnItemActivatedListener { item, e ->
Log.e("MainActivity", item.toString())
return@withOnItemActivatedListener true
}
.build()
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4FMFDUJPO5SBDLFSΠϯελϯεΛ࡞Δ
selectionTracker = SelectionTracker.Builder(
"my-selection-id",
binding.recyclerView,
StableIdKeyProvider(binding.recyclerView),
BookIdDetailsLookup(binding.recyclerView),
StorageStrategy.createLongStorage())
.withOnItemActivatedListener { item, e ->
Log.e("MainActivity", item.toString())
return@withOnItemActivatedListener true
}
.build()
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*UFNΛ4FMFDUJPO#VOEMFʹม͢ΔϝιουΛ࣋ͭɻ
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© DMM.com X
4FMFDUJPO5SBDLFSΠϯελϯεΛ࡞Δ
selectionTracker = SelectionTracker.Builder(
"my-selection-id",
binding.recyclerView,
StableIdKeyProvider(binding.recyclerView),
BookIdDetailsLookup(binding.recyclerView),
StorageStrategy.createLongStorage())
.withOnItemActivatedListener { item, e ->
Log.e("MainActivity", item.toString())
return@withOnItemActivatedListener true
}
.build()
ඞཁͩͬͨΒϦεφʔొɻ
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© DMM.com X
#PPL*E%FUBJMT-PPLVQΛ࡞Δ
class BookIdDetailsLookup(
private val recyclerView: RecyclerView
) : ItemDetailsLookup() {
override fun getItemDetails(e: MotionEvent): ItemDetails? =
recyclerView.findChildViewUnder(
e.x,
e.y
)?.let {
(recyclerView.getChildViewHolder(it) as? BookViewHolder)?.getItemIdDetails()
}
}
ୈࡾҾͩͬͨ#PPL*E%FUBJMT-PPLVQͷ࣮ɻ
λονΠϕϯτͷ࠲ඪ͔Βɺ֘ͷΞΠςϜΛฦ͚ͩ͢
ͷγϯϓϧͳ࣮ɻ
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͜͜·Ͱ࣮ͨ͠ͷΛݟͯΈΔ
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7JFXʹબঢ়ଶ͔Ͳ͏͔Λө͢Δ
class BookAdapter(
context: Context,
private val bookList: List
) : RecyclerView.Adapter() {
ɿ
override fun onBindViewHolder(
holder: BookViewHolder,
position: Int
) {
val item = bookList[position]
holder.bind(
selectionChecker?.isSelected(item.id) ?: false,
position,
bookList[position]
)
}
}
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7JFXTFU"DUJWBUFEͰηοτ͢Δɻ
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© DMM.com X
7JFXʹબঢ়ଶ͔Ͳ͏͔Λө͢Δ
class BookAdapter(
context: Context,
private val bookList: List
) : RecyclerView.Adapter() {
ɿ
override fun onBindViewHolder(
holder: BookViewHolder,
position: Int
) {
val item = bookList[position]
holder.bind(
selectionChecker?.isSelected(item.id) ?: false,
position,
bookList[position]
)
}
}
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7JFXTFU"DUJWBUFEͰηοτ͢Δɻ
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ऴΘΓʹ
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AVTF@TUBCMF@JEATUBCMFJE༻ϒϥϯν
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