Postpone Shared Element Transition

DetailActivity.kt

override fun onCreate(savedInstanceState: Bundle?) {
    ...
    supportPostponeEnterTransition()
    detailImage.load(url) {
        supportStartPostponedEnterTransition()
    }
}

GlideLoader.kt

fun ImageView.load(url: String, onLoadingFinished: () -> Unit = {}) {
    val listener = object : RequestListener<Drawable> {
        override fun onLoadFailed(e: GlideException?, model: Any?, target: Target<Drawable>?, isFirstResource: Boolean): Boolean {
            onLoadingFinished()
            return false
        }

        override fun onResourceReady(resource: Drawable?, model: Any?, target: Target<Drawable>?, dataSource: DataSource?, isFirstResource: Boolean): Boolean {
            onLoadingFinished()
            return false
        }
    }
    Glide.with(this)
            .load(url)
            .apply(RequestOptions.placeholderOf(R.drawable.placeholder))
            .listener(listener)
            .into(this)
}