This adapter is:
- Type-safe and multitype
- Written once and used for each list in a project (including DiffUtil)
- Without the need to create additional interfaces or models-wrappers. Only those ones you really need
- Kotlin (with using coroutines)
- Android View Binding
In your module level build.gradle add:
android {
...
buildFeatures {
viewBinding true
}
...
}
dependencies {
...
implementation 'io.github.vsukharew:anytypeadapter:x.y.z'
...
}
- Inherit
AnyTypeDelegateandAnyTypeViewHolder
class TrackDelegate : AnyTypeDelegate<Track, DelegateTrackBinding, Holder>() {
override fun createViewHolder(itemView: View): Holder = Holder(
// generated view binding file
DelegateTrackBinding.bind(itemView)
)
override fun getItemViewType(): Int = R.layout.delegate_track
override fun getItemId(item: Track): String = item.id
class Holder(
binding: DelegateTrackBinding
) : AnyTypeViewHolder<Track, DelegateTrackBinding>(binding) {
// views declaration
override fun bind(item: Track) {
// bind data
}
}
}class PerformerDelegate : AnyTypeDelegate<Performer, DelegatePerformerBinding, Holder>() {
override fun createViewHolder(itemView: View): Holder = Holder(
// generated view binding file
DelegatePerformerBinding.bind(itemView)
)
override fun getItemViewType(): Int = R.layout.delegate_performer
override fun getItemId(item: Performer): String = item.id
class Holder(
binding: DelegatePerformerBinding
) : AnyTypeViewHolder<Performer, DelegatePerformerBinding>(binding) {
// views declaration
override fun bind(item: Performer) {
// bind data
}
}
}In case of not having data to be bound inherit NoDataDelegate and NoDataViewHolder
class GoPremiumDelegate(
private val subscribeToPremiumListener: () -> Unit
) : NoDataDelegate<GoPremiumBinding>() {
override fun createViewHolder(itemView: View): NoDataViewHolder<GoPremiumDelegate> =
Holder(GoPremiumBinding.bind(itemView))
override fun getItemViewType(): Int = R.layout.delegate_go_premium
inner class Holder(binding: GoPremiumDelegate) :
NoDataViewHolder<GoPremiumDelegate>(binding) {
init {
binding.retryBtn.setOnClickListener {
retryClickListener.invoke()
}
}
}
}- Create adapter and delegates instances
//class-scope variables
val trackDelegate = TrackDelegate()
val performerDelegate = PerformerDelegate()
val goPremiumDelegate = GoPremiumDelegate() { /* subscribe to premium implementation */ }
val adapter = AnyTypeAdapter()- Create
AnyTypeCollection, fill it with the data and pass it to adapter
// combine builder methods depending on your data
AnyTypeCollection.Builder()
.add(tracks, trackDelegate)
.addIf(goPremiumDelegate) { user !is PremiumUser }
.addIfNotEmpty(performers, performerDelegate)
.build()
.let { anyTypeAdapter.setCollection(it) }
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