class MyAdapter : RecyclerView.Adapter<MyAdapter.ViewHolder>() {
// ViewHolder class implementation
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view = LayoutInflater.from(parent.context).inflate(R.layout.item_layout, parent, false)
return ViewHolder(view)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
// Bind data to views
}
override fun getItemCount(): Int {
// Return the number of items in the data set
}
}
class MyActivity : AppCompatActivity() {
// Activity class implementation
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val recyclerView = findViewById<RecyclerView>(R.id.recyclerView)
val layoutManager = LinearLayoutManager(this)
recyclerView.layoutManager = layoutManager
val adapter = MyAdapter()
recyclerView.adapter = adapter
// Set a listener to adjust item heights on scroll
recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
super.onScrolled(recyclerView, dx, dy)
// Adjust item heights based on scroll direction (dy)
if (dy > 0) {
// Scrolling down
adjustItemHeights(recyclerView, false)
} else {
// Scrolling up
adjustItemHeights(recyclerView, true)
}
}
})
}
private fun adjustItemHeights(recyclerView: RecyclerView, increaseHeight: Boolean) {
for (i in 0 until recyclerView.childCount) {
val child = recyclerView.getChildAt(i)
val viewHolder = recyclerView.getChildViewHolder(child) as MyAdapter.ViewHolder
// Adjust item height based on the scroll direction
val newHeight = if (increaseHeight) {
(child.height + 10).coerceAtMost(500) // Increase height (example)
} else {
(child.height - 10).coerceAtLeast(100) // Decrease height (example)
}
// Set the adjusted height to the item view
viewHolder.itemView.layoutParams.height = newHeight
viewHolder.itemView.requestLayout()
}
}
}