override fun onCreate()

in ActionOpenDocumentTree/app/src/main/java/com/example/android/ktfiles/MainActivity.kt [31:54]

• 21 lines of code
• 2 McCabe index (conditional complexity)

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        setSupportActionBar(toolbar)

        val openDirectoryButton = findViewById<FloatingActionButton>(R.id.fab_open_directory)
        openDirectoryButton.setOnClickListener {
            openDirectory()
        }

        supportFragmentManager.addOnBackStackChangedListener {
            val directoryOpen = supportFragmentManager.backStackEntryCount > 0
            supportActionBar?.let { actionBar ->
                actionBar.setDisplayHomeAsUpEnabled(directoryOpen)
                actionBar.setDisplayShowHomeEnabled(directoryOpen)
            }

            if (directoryOpen) {
                openDirectoryButton.visibility = View.GONE
            } else {
                openDirectoryButton.visibility = View.VISIBLE
            }
        }
    }