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@scottschmitz
Last active Mar 8, 2018
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Expandable List Fragment
import android.view.View
import com.xwray.groupie.ExpandableGroup
import com.xwray.groupie.ExpandableItem
import com.xwray.groupie.Item
import com.xwray.groupie.ViewHolder
import kotlinx.android.extensions.LayoutContainer
import kotlinx.android.synthetic.main.list_item_brand.*
class BrandItem(private val brand: String): Item<BrandItem.BrandViewHolder>(), ExpandableItem {
private var expandableGroup: ExpandableGroup? = null
override fun getLayout(): Int {
return R.layout.list_item_brand
}
override fun createViewHolder(itemView: View): BrandViewHolder {
val holder = BrandViewHolder(itemView)
holder.expandCollapse.setOnClickListener {
expandableGroup?.onToggleExpanded()
}
return holder
}
override fun bind(holder: BrandViewHolder, position: Int) {
holder.brandName.text = brand
}
override fun setExpandableGroup(group: ExpandableGroup) {
expandableGroup = group
}
class BrandViewHolder(override val containerView: View): ViewHolder(containerView), LayoutContainer
}
import android.os.Bundle
import android.support.v4.app.Fragment
import android.support.v7.widget.GridLayoutManager
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.xwray.groupie.*
import kotlinx.android.synthetic.main.fragment_main.*
class KotlinSyntheticFragment: Fragment() {
companion object {
val phones = mapOf(
"Apple" to listOf(
"iPhone",
"iPhone 3G",
"iPhone 3GS",
"iPhone 4",
"iPhone 4S",
"iPhone 5",
"iPhone 5c",
"iPhone 5s",
"iPhone 6",
"iPhone 6 Plus",
"iPhone 6s",
"iPhone 6s Plus",
"iPhone SE",
"iPhone 7",
"iPhone 7 Plus",
"iPhone 8",
"iPhone 8 Plus",
"iPhone X"
),
"Google" to listOf(
"Pixel",
"Pixel XL",
"Pixel 2",
"Pixel 2 XL"
),
"HTC" to listOf(
"Nexus One"
),
"Huawei" to listOf(
"Nexus 6P"
),
"LG" to listOf(
"Nexus 5",
"Nexus 5X"
),
"Motorola" to listOf(
"Nexus 6"
),
"Samsung" to listOf(
"Nexus S",
"Galaxy Nexus"
)
)
}
private val groupAdapter = GroupAdapter<ViewHolder>()
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
return inflater.inflate(R.layout.fragment_main, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val layoutManager = GridLayoutManager(activity, groupAdapter.spanCount)
layoutManager.spanSizeLookup = groupAdapter.spanSizeLookup
phones.forEach { (brand, phones) ->
val brandItem = BrandItem(brand)
val expandableGroup = ExpandableGroup(brandItem)
phones.forEach { phone ->
expandableGroup.add(PhoneItem(phone))
}
groupAdapter.add(expandableGroup)
}
recyclerView.layoutManager = layoutManager
recyclerView.adapter = groupAdapter
}
}
import android.view.View
import com.xwray.groupie.Item
import com.xwray.groupie.ViewHolder
import kotlinx.android.extensions.LayoutContainer
import kotlinx.android.synthetic.main.list_item_phone.*
class PhoneItem(private val phone: String): Item<PhoneItem.PhoneViewHolder>() {
override fun getLayout(): Int {
return R.layout.list_item_phone
}
override fun createViewHolder(itemView: View): PhoneViewHolder {
return PhoneViewHolder(itemView)
}
override fun bind(holder: PhoneViewHolder, position: Int) {
holder.phoneName.text = phone
}
class PhoneViewHolder(override val containerView: View): ViewHolder(containerView), LayoutContainer
}
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