The above is what I am trying to achieve .
My recycle view item has two buttons . Both are hidden by default . On click of the item view should show the buttons for 1 sec. After it must hide . if I tap on either of these buttons , the timer should be reset for another 1 sec . Something similar to a debounce in rx java. Need to do it with Kotlin coroutines .
I was able to achieve the above using kotlin coroutines jobs .
My layout
<?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>
My addapter
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
}
}
The problem is , when I add notifyItemChanged on my button click . Everything breaks. the button closes sometimes . sometimes not .
please help..