问题描述
以上就是我想要实现的。
我的回收视图项目有两个按钮。默认情况下，两者都是隐藏的。单击项目视图应显示按钮 1 秒。之后它必须隐藏。如果我点击这些按钮中的任何一个，计时器应该再重置 1 秒。类似于 rx java 中的去抖动。 需要用 Kotlin 协程来做。
我能够使用 kotlin 协程作业实现上述目标。
我的布局
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="150dp"
android:layout_height="250dp"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_marginHorizontal="5dp"
android:elevation="5dp"
android:layout_gravity="bottom"
>
<TextView
android:id="@+id/product_count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="@id/guideline_horizontal_top"
android:text="x2"
android:fontFamily="@font/gotham"
android:textColor="@color/dark_blue"
android:textSize="20sp"/>
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline_horizontal_top"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent=".20"/>
<androidx.cardview.widget.CardView
android:id="@+id/part_card"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="@id/guideline_horizontal_top"
app:layout_constraintBottom_toBottomOf="parent"
app:cardElevation="5dp"
android:clickable="true"
android:foreground="?attr/selectableItemBackgroundBorderless"
>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<com.google.android.material.button.MaterialButton
android:id="@+id/plus_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:backgroundTint="@color/transparent_dark_blue"
app:layout_constraintTop_toTopOf="parent"
android:insetTop="0dp"
app:cornerRadius="0dp"
android:text="ADD"
android:visibility="invisible"/>
<com.google.android.material.button.MaterialButton
android:id="@+id/minus_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:backgroundTint="@color/transparent_dark_blue"
app:layout_constraintBottom_toBottomOf="parent"
android:insetBottom="0dp"
app:cornerRadius="0dp"
android:text="REDUCE"
android:visibility="invisible"/>
<TextView
android:id="@+id/partition_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:text="PART 1"
android:layout_margin="5dp"
android:textColor="@color/dark_blue"
android:fontFamily="@font/gotham_thin_font"
android:textStyle="bold"
/>
<TextView
android:id="@+id/items_left"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Items left : "
android:layout_margin="5dp"
android:textColor="@color/dark_blue"
android:fontFamily="@font/gotham_thin_font"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
android:gravity="center"/>
<TextView
android:id="@+id/product_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="@id/partition_text"
app:layout_constraintBottom_toTopOf="@id/items_left"
android:layout_margin="5dp"
android:textColor="@color/dark_blue"
android:fontFamily="@font/gotham_thin_font"
android:textStyle="bold"
android:gravity="start"
android:text="Product name here"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>
我的适配器
class PartitionRecycleAdapter : RecyclerView.Adapter<PartitionRecycleAdapter.ViewHolder>() {
private var partitions: List<Selection<Partition>> = listof()
private val coroutinescope: Coroutinescope = Coroutinescope(dispatchers.IO)
private var buttonManage: Job? = null
fun update(partitions: List<Selection<Partition>>) {
this.partitions = partitions
notifyDataSetChanged()
}
inner class ViewHolder(val binding: PartitionRecycleItembinding) : RecyclerView.ViewHolder(binding.root) {
fun bind(partition: Selection<Partition>,position: Int) {
binding.apply {
partitionText.text = "Part ${partition.item.number}"
productName.text = partition.item.productName
val itemsLeftvar = partition.item.currentQty - partition.qty
itemsLeft.text = "Items left : $itemsLeftvar"
productCount.text = "X${partition.qty}"
if (partition.qty > 0) {
productCount.visibility = View.VISIBLE
} else {
productCount.visibility = View.INVISIBLE
}
Log.d(TAG,"bind: OUTER")
val listener = View.OnClickListener { view ->
buttonManage?.cancel()
buttonManage = coroutinescope.launch {
Log.d(TAG,"bind: Coroutine started")
delay(1000)
withContext(dispatchers.Main) {
binding.plusButton.visibility = View.INVISIBLE
binding.minusButton.visibility = View.INVISIBLE
Log.d(TAG,"bind: Coroutine Ended")
}
}
if (view == partCard) {
binding.plusButton.visibility = View.VISIBLE
binding.minusButton.visibility = View.VISIBLE
}
if (view == plusButton) {
Log.d(TAG,"bind: PLUS")
if (itemsLeftvar > 0) {
partition.qty++
// notifyItemChanged(position)
}
}
if (view == minusButton) {
Log.d(TAG,"bind: MINUS")
if (partition.qty > 0) {
partition.qty--
// notifyItemChanged(position)
}
}
}
partCard.setonClickListener(listener)
plusButton.setonClickListener(listener)
minusButton.setonClickListener(listener)
}
}
}
override fun onCreateViewHolder(parent: ViewGroup,viewType: Int): ViewHolder {
val binding = PartitionRecycleItembinding.inflate(LayoutInflater.from(parent.context),parent,false)
return ViewHolder(binding)
}
override fun onBindViewHolder(holder: ViewHolder,position: Int) {
val partition = partitions[position]
holder.bind(partition,position)
}
override fun getItemCount(): Int {
return partitions.size
}
}
问题是，当我在按钮上添加 notifyItemChanged 时，单击 。一切都破裂了。按钮有时会关闭。有时不会。
请帮忙..
解决方法
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