Try It Yourself - SyntaxStudy Editor

HTML / CSS / JS

import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import kotlinx.coroutines.flow.*
import kotlinx.coroutines.launch

data class UiState(
    val isLoading: Boolean = false,
    val items: List<String> = emptyList(),
    val error: String? = null,
)

class ItemViewModel : ViewModel() {

private val _uiState = MutableStateFlow(UiState())
    val uiState: StateFlow<UiState> = _uiState.asStateFlow()

init { loadItems() }

fun loadItems() {
        viewModelScope.launch {
            _uiState.update { it.copy(isLoading = true, error = null) }
            try {
                val result = repository.getItems()   // suspend fun
                _uiState.update { it.copy(isLoading = false, items = result) }
            } catch (e: Exception) {
                _uiState.update { it.copy(isLoading = false, error = e.message) }
            }
        }
    }
}

// Fragment (collector side)
// lifecycleScope.launch {
//     viewLifecycleOwner.repeatOnLifecycle(Lifecycle.State.STARTED) {
//         viewModel.uiState.collect { state ->
//             binding.progressBar.isVisible = state.isLoading
//             adapter.submitList(state.items)
//             state.error?.let { showError(it) }
//         }
//     }
// }