Kotlin Programming: The Big Nerd Ranch Guide, First Edition

Wiring Up Views

To display the character data in the UI, you will first retrieve each view element that will display text using a function available on NewCharacterActivity (via inheritance) called findViewById. findViewById accepts a view element id (the android:ids defined in the XML) and returns the view element if a match is found.

In NewCharacterActivity.kt, update onCreate to look up each view element that will display data by its id and assign it to a local variable:

Listing 21.2  Looking up view elements (NewCharacterActivity.kt)

class NewCharacterActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_new_character)
        val ...