ReminderEditScreen.kt

@Composable
fun ReminderEditScreen() {

    Scaffold() {
        val titleInputValue = remember { mutableStateOf(TextFieldValue()) }
        val titleError = remember { mutableStateOf("") }
        val descriptionInputValue = remember { mutableStateOf(TextFieldValue()) }
        val descriptionError = remember { mutableStateOf("") }

        var localDateTime: LocalDateTime? by remember {
            mutableStateOf(null)
        }

        val remindTypeState = remember {
            mutableStateOf(RemindType.NONE)
        }

        val mContext = LocalContext.current

        BoxWithLayout {
            Column(
                Modifier
                    .padding(10.dp)
                    .fillMaxSize()
                    .verticalScroll(rememberScrollState())
                    .weight(1f, false),
                horizontalAlignment = Alignment.CenterHorizontally,
                verticalArrangement = Arrangement.SpaceEvenly
            ) {
                Text(
                    text = "Set Reminder",
                    fontSize = 30.sp,
                    fontWeight = FontWeight.Bold
                )
                Spacer(modifier = Modifier.height(10.dp))

                OutlinedTextFieldValidation(value = titleInputValue.value.text, onValueChange = {
                    titleInputValue.value = TextFieldValue(it)
                }, placeholder = {
                    Text(
                        text = "Enter your title"
                    )
                },
                    keyboardOptions = KeyboardOptions(
                        capitalization = KeyboardCapitalization.None,
                        autoCorrect = true,
                        keyboardType = KeyboardType.Text,
                        imeAction = ImeAction.Done
                    ),
                    textStyle = TextStyle(
                        color = Color.Black, fontSize = TextUnit.Unspecified,
                        fontFamily = FontFamily.SansSerif
                    ),
                    maxLines = 1,
                    singleLine = true,
                    modifier = Modifier
                        .border(5.dp, Color.Unspecified, RoundedCornerShape(10.dp))
                        .fillMaxWidth()
                        .background(
                            color = Color(0xffe2ebf0),
                            shape = CircleShape
                        ),
                    shape = CircleShape,
                    error = titleError.value
                )

                Spacer(modifier = Modifier.height(10.dp))

                OutlinedTextFieldValidation(
                    value = descriptionInputValue.value.text,
                    onValueChange = {
                        descriptionInputValue.value = TextFieldValue(it)
                    },
                    placeholder = {
                        Text(
                            text = "Enter your subtitle"
                        )
                    },
                    keyboardOptions = KeyboardOptions(
                        capitalization = KeyboardCapitalization.None,
                        autoCorrect = true,
                        keyboardType = KeyboardType.Text,
                        imeAction = ImeAction.Done
                    ),
                    textStyle = TextStyle(
                        color = Color.Black, fontSize = TextUnit.Unspecified,
                        fontFamily = FontFamily.SansSerif
                    ),
                    maxLines = 1,
                    singleLine = true,
                    modifier = Modifier
                        .fillMaxWidth()
                        .background(
                            color = Color(0xffe2ebf0),
                            shape = CircleShape
                        ),
                    shape = CircleShape,
                    error = descriptionError.value
                )

                Spacer(modifier = Modifier.height(10.dp))

                DatePicker {
                    localDateTime = it
                }
                Spacer(modifier = Modifier.height(20.dp))
                TimePicker(localDateTime) {
                    localDateTime = it
                }
                RepeatTypeDropDown {
                    remindTypeState.value = it
                }

                Button(onClick = {

                    val result = validateData(
                        titleInputValue,
                        descriptionInputValue,
                        titleError,
                        descriptionError,
                        localDateTime,
                        mContext
                    )

                    if (!result) {
                        return@Button
                    }

                    val title = titleInputValue.value.text
                    val description = descriptionInputValue.value.text
                    val startTimeInMillis =
                        localDateTime!!.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli()
                    val reminderType = remindTypeState.value.toString()

                    val intent = Intent()
                    intent.action = Intent.ACTION_SEND
                    intent.data =
                        Uri.parse("remindme://reminder?title=${title}&description=${description}&startTimeInMillis=${startTimeInMillis}&reminderType=${reminderType}")

                    mContext.startActivity(intent)
                }) {
                    Text(text = "Set Reminder")
                }
            }
        }
    }


}