Older Android code accesses views with findViewById, which is verbose and not type-safe:

// Older approach — works, but easy to get wrong
val greetingText = findViewById<TextView>(R.id.greetingText)

Modern projects use ViewBinding instead, which generates a typed binding class for each layout automatically. Enable it in your module’s build.gradle.kts:

android {
    buildFeatures {
        viewBinding = true
    }
}

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        binding.greetingText.text = "Hello from ViewBinding!"
    }
}

lateinit var tells the compiler “trust me, this will be assigned before it’s used” — appropriate here because binding genuinely can’t be created until onCreate runs, but must be accessible from other methods in the class afterward.