Compose Notes

This app helps you to save your thoughts using Room. The goal of this app is to showcase inserting data loading it from Room DB, implementing DI, using LazyColumn and Compose Navigation and async programming with Coroutines and Flow. Also implemented a CustomDialog with custom layout.

XML Version of This app with RecyclerView, Jetpack Navigation Component, Custom Exception and Custom Dialog

What I used in this project:

• Jetpack Compose with Compose Navigation
• Koin and Hilt DI
• Room
• Coroutines and Flow
• Custom Alert Dialog

Getting data from DB and observing it in Fragment:

    //uses compose.runtime.State
    private val _notes = MutableState<List<Note>>(emptyList())
    val notes: State<List<Note>> = _notes
    
    //loads data from db
    repository.getNotes().onEach { notes ->
            withContext(Dispatchers.IO) {
                _notes.value = notes
            }
        }.launchIn(viewModelScope)
        
    //observing data in Composable function
    @Composable
    fun NoteListScreen(navController: NavHostController, viewModel: NoteViewModel) {
    val notes = viewModel.notes.value
    
    LazyColumn(modifier = Modifier.fillMaxSize()) {
            items(notes) { note ->
                NoteItem(note)
    }

Custom Alert Dialog for deleting a note:

@Composable
fun CustomDialog(onDeleteConfirm:()->Unit,onDeleteDismiss:()->Unit) {
    Dialog(onDismissRequest = onDeleteDismiss) {
        CustomDialogUI(onDeleteConfirm = onDeleteConfirm, onDeleteDismiss = onDeleteDismiss)
    }
}

  @Composable
fun CustomDialogUI(
    titleText:String = "Delete note?",
    messageText:String = "Are you sure you want to delete note? There will be no way to restore it.",
    onDeleteConfirm:()->Unit,
    onDeleteDismiss:()->Unit
) {
    Card {
    Icon( imageVector = Icons.Rounded.Delete )

            Column(modifier = Modifier.padding(16.dp)) {
            
                Text(text = titleText, textAlign = TextAlign.Center)
                
                Text(text = messageText, textAlign = TextAlign.Center)
            }
            //.......................................................................
            Row(
                Modifier
                    .fillMaxWidth(),
                horizontalArrangement = Arrangement.SpaceAround
            ) {
                TextButton(onClick = onDeleteDismiss) { Text("Cancel") }
                TextButton(onClick = onDeleteConfirm) { Text("Delete") }
            }
        }
    }