state_update_kotlin.kt

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
          val viewModel: MainViewModel by viewModels()
            var isEligible by remember {
                mutableStateOf(false)
            }
            LaunchedEffect(true) {
                viewModel.isEligible.collect {
                    isEligible = it
                }
            }
            Column(
                modifier = Modifier
                    .fillMaxSize()
                    .background(Color.White),
                verticalArrangement = Arrangement.Center,
                horizontalAlignment = Alignment.CenterHorizontally
            ) {
                Text(
                    text = "Eligibility = $isEligible",
                    fontSize = 20.sp,
                    modifier = Modifier.padding(top = 16.dp)
                )
                Button(
                    modifier = Modifier.background(
                        if (isEligible) Color.Green else Color.Gray
                    ),
                    onClick = {
                        viewModel.creditScore((0..900).random())
                        viewModel.age((1..100).random())
                    }) {
                    Text(text = "Proceed")
                }
            }
        }
    }
}