BetterActivity.kt

class BetterActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val button = findViewById<Button>(R.id.button)
        button.setOnClickListener { showBetterDialog() }

        val normalButton = findViewById<Button>(R.id.normalButton)
        normalButton.setOnClickListener { launchNormalActivity() }
    }

    private fun launchNormalActivity() {
        startActivity(Intent(this, NormalActivity::class.java))
    }

    private fun showBetterDialog() {
        showDialogFragment {
            title("Better Dialog")
            message("This is a better dialog")
            positiveButtonText("Continue")
            negativeButtonText("Go back")
            positiveButtonAction { showPositiveToast() }
            negativeButtonAction { showNegativeToast() }
        }
    }

    private fun showNegativeToast() =
        Toast.makeText(this, "Negative button", Toast.LENGTH_SHORT).show()

    private fun showPositiveToast() =
        Toast.makeText(this, "Positive button", Toast.LENGTH_SHORT).show()
}