Dynamic height viewpager in android

DynamicHeightViewPager.kt

import android.content.Context
import android.util.AttributeSet
import androidx.viewpager.widget.ViewPager

class DynamicHeightViewPager @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null) : ViewPager(context, attrs) {

override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
    var heightMeasureSpec = heightMeasureSpec

    var height = 0
    for (i in 0 until childCount) {
        val child = getChildAt(i)
        child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED))
        val h = child.measuredHeight
        if (h > height) height = h
    }

    if (height != 0) {
        heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY)
    }

    super.onMeasure(widthMeasureSpec, heightMeasureSpec)
}}

MainActivity.kt

    private fun renderRegionalOfferList(offers: List<Offer>?) {
        val offerAdapter = RegionalOffersAdapter(requireContext(), localViewModel.offerClickSubject, offers)
        binding.viewRegionalOffers.viewPager.adapter = offerAdapter
        binding.viewRegionalOffers.viewPager.offscreenPageLimit = 2
        binding.viewRegionalOffers.viewPager.pageMargin=18


        dotscount = offerAdapter.count
        dots = arrayOfNulls(dotscount)
        //adding dots base don dotscount ie. total number of images
        for (i in 0 until dotscount) {
            dots[i] = ImageView(requireContext())
            dots[i]!!.setImageDrawable(ContextCompat.getDrawable(requireContext(), R.drawable.non_active_dot))
            val param = LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT)
            param.setMargins(8, 0, 8, 0)
            binding.viewRegionalOffers.sliderDots.addView(dots[i], param)
        }
        //0 position active by default
        dots[0]!!.setImageDrawable(ContextCompat.getDrawable(requireContext(), R.drawable.active_dot))

        //image slider listener
        binding.viewRegionalOffers.viewPager.addOnPageChangeListener(object : ViewPager.OnPageChangeListener {
            override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {

            }

            override fun onPageSelected(position: Int) {
                for (i in 0 until dotscount) {
                    dots[i]!!.setImageDrawable(ContextCompat.getDrawable(requireContext(), R.drawable.non_active_dot))
                }
                dots[position]!!.setImageDrawable(ContextCompat.getDrawable(requireContext(), R.drawable.active_dot))
            }

            override fun onPageScrollStateChanged(state: Int) {

            }
        })


        //offerAdapter.swapData(offers)
    }

RegionalOffersAdapter.kt

class RegionalOffersAdapter(
    private val context: Context,
    private val clickSubject: PublishSubject<Offer>,
    val items: List<Offer>?
) : PagerAdapter() {

    //private val items = mutableListOf<Offer>()

    override fun getCount(): Int = items?.size ?: 0


    override fun instantiateItem(container: ViewGroup, position: Int): Any {
        val inflater = context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
        val view = inflater.inflate(R.layout.item_regional_offer, null)
        val image = view.findViewById<ImageView>(R.id.image)
        val offerTitle = view.findViewById<TextView>(R.id.offer_title)
        val name = view.findViewById<TextView>(R.id.name)
        val ratingFollowers = view.findViewById<TextView>(R.id.rating_followers)
        val amount = view.findViewById<TextView>(R.id.amount)
        val categoryLocationContainer = view.findViewById<FancyCategoryLocationChipView>(R.id.category_location_container)

        name.text = items?.get(position)?.createdByCompany?.user?.name ?: "Company"
        offerTitle.text = items?.get(position)?.name ?: "Test offer"
        image.setImageBitmap(
            BitmapFactory.decodeResource(
                view.context.resources,
                R.drawable.profile_placeholder
            )
        )

        amount.text = "${items?.get(position)?.rewards?.get(0)?.unit ?: "$"} ${items?.get(position)?.rewards?.get(0)?.amount ?: "0"}"


        view.setOnClickListener {
            InfluencerOfferDetailsActivity.start(context, items?.get(position)?.id ?: 0)
        }

        items?.get(position)?.mainImage?.let {
            Picasso.get().load(it.getImagePath())
                .placeholder(R.drawable.profile_placeholder)
                .error(R.drawable.profile_placeholder)
                .into(image)
        }

        //offerContainer.setOnClickListener { clickSubject.onNext(offerModel) }
        ratingFollowers.text = "Rating: ${items?.get(position)?.createdByCompany?.user?.calculatedRating ?: 0} | ${items?.get(position)?.minimumAudienceCount} Min Followers"
        categoryLocationContainer.setupView3(context, items?.get(position)?.categories, items?.get(position)?.audienceLocations)
        //categoryLocationContainer.setupView(context)
        val vp = container as ViewPager
        vp.addView(view, 0)
        return view
    }

    override fun isViewFromObject(view: View, `object`: Any): Boolean {
        return view === `object`
    }

    fun swapData(items: List<Offer>?) {
        /* this.items.clear()

         if (!items.isNullOrEmpty()) {
             this.items.addAll(items.sortedWith(compareBy { it.status?.shortName }))
         }
         notifyDataSetChanged()*/
    }

    override fun destroyItem(container: ViewGroup, position: Int, `object`: Any) {
        val vp = container as ViewPager
        val view = `object` as View
        vp.removeView(view)
    }

    override fun getPageWidth(position: Int): Float {
        return .8f
    }


}

view_regional_offers.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:tools="http://schemas.android.com/tools"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:id="@+id/regionalOfferContainer"
        android:backgroundTint="@color/white"
        android:background="@drawable/top_rounded_background"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/textView9"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="24dp"
            android:layout_marginTop="22dp"
            android:layout_marginEnd="16dp"
            android:fontFamily="@font/montserrat_semi_bold"
            android:text="@string/label_regional_offers"
            android:textColor="@color/fancy_black_60"
            android:textSize="15sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <com.sway.android.utils.view.DynamicHeightViewPager
            android:id="@+id/viewPager"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="30dp"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="18dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView9">

        </com.sway.android.utils.view.DynamicHeightViewPager>


        <LinearLayout
            android:id="@+id/sliderDots"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="16dp"
            android:layout_marginTop="8dp"
            android:orientation="horizontal"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/viewPager" />

    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>