DataStoreAsyncActivity.kt

class MainActivity : AppCompatActivity() {
    private lateinit var bmiBrain: BmiBrain

    // initialize class
    bmiBrain = BmiBrain(this)
  
    // load value
    binding.apply {
        lifecycleScope.launch {
            val name = async { bmiBrain.getName() }
            edtName.setText(name.await())
        }
    }

    // save value
    val name = edtName.text.toString()
    lifecycleScope.launch {
        bmiBrain.saveName(name)
    }

}