Zhuinden

class MainActivity : AppCompatActivity() {
    private lateinit var swipeFragment: SwipeFragment
    private lateinit var favoritesFragment: FavoritesFragment
    private lateinit var newsFragment: NewsFragment

    private val fragments: Array<out Fragment> get() = arrayOf(swipeFragment, favoritesFragment, newsFragment)

    private fun selectFragment(selectedFragment: Fragment) {
        var transaction = supportFragmentManager.beginTransaction()
        fragments.forEachIndexed { index, fragment ->

VDenis

1. Store api keys in a xml file

Put xml file "api_keys.xml" in the directory "res/value/".

api_keys.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="THE_MOVIE_DB_API_TOKEN">XXXXX</string>
</resources>