MainActivityXml.kt

class MainActivity : AppCompatActivity() {

    private lateinit var binding: ActivityMainBinding

    private val viewModel by viewModels<MainViewModel>()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        binding.run {
            increase.setOnClickListener { viewModel.increase() }
            decrease.setOnClickListener { viewModel.decrease() }
        }

        lifecycleScope.launch {
            repeatOnLifecycle(Lifecycle.State.STARTED) {
                viewModel.count.collect {
                    binding.count.text = "Jumlah: $it"
                }
            }
        }
    }
}