var collectionView = findViewById(R.id.imageCollectionView)

    collectionView.maxRows = ImageCollectionView.NO_ROW_LIMITS
    collectionView.maxRows = 10

    collectionView.maxImagePerRow =3

    collectionView.imageMargin = 10

    collectionView.baseImageHeight = 150

    collectionView.mBackgroundColor = Color.WHITE

    collectionView.pinchToZoom = true

    collectionView.showExternalBorderMargins = true

    val bitmap = ...
    collectionView.addImage(bitmap)

    val bitmap2 = ...
    collectionView.addImage(bitmap2, object : ImageCollectionView.OnImageClickListener {
        override fun onClick(bitmap: Bitmap, imageView: ImageView) {
            Toast.makeText(imageView.context, "Test Click on image ...", Toast.LENGTH_LONG).show()
        }
    })
    // or simply
    collectionView.addImage(bitmap2, { bitmap: Bitmap?, imageView: ImageView? ->
        Toast.makeText(context, "Test Click on image ...", Toast.LENGTH_LONG).show()
    })

    collectionView.setOnMoreClicked(object : ImageCollectionView.OnMoreClickListener {
        override fun onMoreClicked(bitmaps: List<Bitmap>) {
            Toast.makeText(collectionView.context, "on more clicked ", Toast.LENGTH_LONG).show()
        }
    })
    // or simply
    collectionView.setOnMoreClicked { bitmaps ->
        Toast.makeText(collectionView.context, "on more clicked ", Toast.LENGTH_LONG).show()
    }