override fun onCreateView()

in ActionOpenDocumentTree/app/src/main/java/com/example/android/ktfiles/DirectoryFragment.kt [49:93]
30 lines of code
1 McCabe index (conditional complexity)

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        directoryUri = arguments?.getString(ARG_DIRECTORY_URI)?.toUri()
            ?: throw IllegalArgumentException("Must pass URI of directory to open")

        viewModel = ViewModelProviders.of(this)
            .get(DirectoryFragmentViewModel::class.java)

        val view = inflater.inflate(R.layout.fragment_directory, container, false)
        recyclerView = view.findViewById(R.id.list)
        recyclerView.layoutManager = LinearLayoutManager(recyclerView.context)

        adapter = DirectoryEntryAdapter(object : ClickListeners {
            override fun onDocumentClicked(clickedDocument: CachingDocumentFile) {
                viewModel.documentClicked(clickedDocument)
            }

            override fun onDocumentLongClicked(clickedDocument: CachingDocumentFile) {
                renameDocument(clickedDocument)
            }
        })

        recyclerView.adapter = adapter

        viewModel.documents.observe(viewLifecycleOwner, Observer { documents ->
            documents?.let { adapter.setEntries(documents) }
        })

        viewModel.openDirectory.observe(viewLifecycleOwner, Observer { event ->
            event.getContentIfNotHandled()?.let { directory ->
                (activity as? MainActivity)?.showDirectoryContents(directory.uri)
            }
        })

        viewModel.openDocument.observe(viewLifecycleOwner, Observer { event ->
            event.getContentIfNotHandled()?.let { document ->
                openDocument(document)
            }
        })

        return view
    }