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CodePudding user response：

isError parameter in TextField is a Boolean.

Change 1

You have to change

var isDiastolicTextFieldValueError by rememberSaveable { mutableStateOf(false) }

to

var (isDiastolicTextFieldValueError, updateIsDiastolicTextFieldValueError) = rememberSaveable {
    mutableStateOf(
        false
    )
}

This gives the value and a function to update the value.

Change 2

Then pass both the value and the method to the composable.

Usage

InputWithUnitContainer(
    textFieldValue = diastolicTextFieldValue,
    isError = isDiastolicTextFieldValueError,
    updateIsError = updateIsDiastolicTextFieldValueError,
    incrementTextFieldValue = {
        diastolicTextFieldValue = it
    }
)

Method signature change

@Composable
fun InputWithUnitContainer(
    textFieldValue: TextFieldValue,
    isError: Boolean,
    updateIsError: (Boolean) -> Unit,
    incrementTextFieldValue: (TextFieldValue) -> Unit,
) {
    ...
}

Change 3

Update the usage

TextField(
    value = textFieldValue,
    singleLine = true,
    onValueChange = {
        if (it.text.length <= maxLength) {
            incrementTextFieldValue(it)
        }
        updateIsError(false)
    },
    isError = isError,
    textStyle = TextStyle(),
)