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// Listͱ͔ͰView͕ΨλϯͬͯͳͬͨΓ͢ΔͷΛ͙༻ɽ
inline fun T.executeAfter(block: T.() ->Unit){
block()
// ͙͢ʹbinding͍ͤͨ࣌͞ʹ͏ɽ
executePendingBindings()
}
// ༻ྫ
binding.executeAfter {
//͜͜Ͱbind͢Δɽ
event = item
}
ᶃ
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// TransitionΛԆͤ͞Δ
fun Activity.postponeEnterTransition(timeout: Long) {
postponeEnterTransition()
window.decorView.postDelayed(timeout) {
startPostponedEnterTransition()
}
}
// ༻ྫ
activity?.postponeEnterTransition(500L)
ᶄ
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// ॳظԽɼࢀর͕ৗʹγϯάϧεϨουͰ͔͠ߦΘΕͳ͍࣌༻ɽ
fun lazyFast(operation: () -> T): Lazy =
lazy(LazyThreadSafetyMode.NONE) {
operation()
}
// SYNCRONIZED: σϑΥϧτɽ୯ҰεϨου͔ΒͷॳظԽͰɼෳεϨου͔Βͷࢀর͕Մೳɽ
// PUBLICATION: ෳεϨου͔ΒॳظԽ͠Α͏ͱ͢Δࣄ͕Մೳɽ
// ༻ྫ
private val day: Int by lazyFast {
val args = arguments ?: throw
IllegalStateException("Missing arguments!")
args.getInt(ARG_INT)
}
ᶅ
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inline fun
FragmentActivity.viewModelProvider(
provider: ViewModelProvider.Factory
) =
ViewModelProviders.of(this, provider).get(VM::class.java)
// ༻ྫ
// Before
val viewModel: HogeViewModel =
ViewModelProviders.of(this, viewModelFactory)
.get(HogeViewModel::class.java)
//After
val viewModel: HogeViewModel =
viewModelProvider(viewModelFactory)
ᶆ
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fun ViewGroup.inflate(
@LayoutRes layout: Int, attachToRoot: Boolean = false
): View {
return LayoutInflater.from(context)
.inflate(layout, this, attachToRoot)
}
// ༻ྫ
…
Holder(
parent.inflate(VIEW_TYPE_HEADING, false)
)
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inline fun FragmentManager.inTransaction(
func: FragmentTransaction.() -> FragmentTransaction
) {
beginTransaction().func().commit()
}
// ༻ྫ
supportFragmentManager.inTransaction {
add(FRAGMENT_ID, fragment)
}
ᶈ
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// enumΫϥεΛbundleʹೖΕΕΔܗʹ͢Δ
fun > Bundle.putEnum(key: String, value: T) =
putString(key, value.name)
// ↑ͰೖΕͨenumΫϥεΛऔΓग़͢
inline fun > Bundle.getEnum(key: String):
T = enumValueOf(getString(key))
// ParcelʹbooleanΛॻ͖ࠐΉ
fun Parcel.writeBoolean(value: Boolean) = writeInt(if (value)
1 else 0)
// ↑Ͱมͨ͠booleanΛಡΈࠐΉ
fun Parcel.readBoolean() = readInt() != 0
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// ༻ྫ
// ಡΈ͍͢ʂ
pacel.apply {
writeInt(state)
writeInt(peekHeight)
writeBoolean(isFitToContents)
writeBoolean(isHideable)
writeBoolean(skipCollapsed)
writeBoolean(isDraggable)
}
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fun MutableLiveData.setValueIfNew(newValue: T) {
if (this.value != newValue) value = newValue
}
fun MutableLiveData.postValueIfNew(newValue: T) {
if (this.value != newValue) postValue(newValue)
}
// ObserverଆͰఆͨ͠ํ͕҆શͳؾ͕͢Δ͚ͲͲ͏ͳΜͩΖ͏ɽɽ
ᶊ
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fun LiveData.map(body: (X) -> Y): LiveData {
return Transformations.map(this, body)
}
fun LiveData.switchMap(body: (X) -> LiveData):
LiveData {
return Transformations.switchMap(this, body)
}
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// ༻ྫ
liveData = parentLiveData.map {
(it as? Result.Success)?.data?: 0
}
liveData = parentLiveData.switchMap {
if(value == null) dataLiveData else parentLiveData
}
// ࠷ॳ֦ுؔͬͯࣄʹؾ͔ͮͣɼڻ͍ͨɽ
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val T.checkAllMatched: T
get() = this
// ༻ྫ
// OK
when (sealed) {
ONE -> {…}
TWO -> {…}
}.checkAllMatch
// error
when (sealed) {
ONE -> {…}
//TWO -> {…}
}.checkAllMatch
ᶌ
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