ActivityEmbeddingSplitListener.kt

class ListActivity : AppCompatActivity() {

    private val splitListener = Consumer<List<SplitInfo>> { splitInfoList ->
        // React to a split change
    }

    override fun onStart() {
        super.onStart()
        SplitController
            .getInstance()
            .addSplitListener(this, mainExecutor, splitListener)
    }

    override fun onStop() {
        super.onStop()
        SplitController
            .getInstance()
            .removeSplitListener(fabSplitListener)
    }
}