CircularImageView.kt

import android.content.Context
import android.graphics.drawable.BitmapDrawable
import android.graphics.drawable.Drawable
import android.util.AttributeSet
import android.widget.ImageView
import androidx.core.graphics.drawable.RoundedBitmapDrawableFactory

class CircularImageView @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyle: Int = 0
) : ImageView(context, attrs, defStyle)

    override fun setImageDrawable(drawable: Drawable?) {
        val radius = 100f
        val bitmap = (drawable as BitmapDrawable).bitmap
        val rid = RoundedBitmapDrawableFactory.create(resources, bitmap)
        rid.cornerRadius = bitmap.width * radius
        super.setImageDrawable(rid)
    }
}