How to hide a floatingActionButton after insert data flutter? - database

Question

I use sqflite for flutter database management. In particular, I would like the user to enter the data only once and therefore I would need to hide and disable the button only once the data has been entered. How can I do?
Home Page, where is the button
class Casa extends StatefulWidget {
static const routeName = '/';
#override
_CasaState createState() => _CasaState();
}
class _CasaState extends State<Casa> {
DataRepository _repository;
#override
void initState() {
super.initState();
_repository = SqlRepository();
}
#override
void dispose() async {
await _repository.closeDB();
super.dispose();
}
void getNewItem(BuildContext context) async {
Attivita newItem =
await Navigator.pushNamed<Attivita>(context, AddItemScreen.routeName);
if (newItem != null) {
await _repository.add(newItem);
setState(() {});
}
}
void switchAndUpdate(Attivita item) async {
await _repository.put(item.id, item);
setState(() {});
}
void delete(Attivita item) async {
await _repository.delete(item.id);
setState(() {});
}
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
backgroundColor: Colors.lightBlue[900],
floatingActionButton: FloatingActionButton(
child: Icon(Icons.add, color: Colors.lightBlue[900],),
backgroundColor: Colors.white,
onPressed: () {
getNewItem(context);
},
),
body:
FutureBuilder<List<Attivita>>(
future: _repository.getAll(),
builder:
(BuildContext context, AsyncSnapshot<List<Attivita>> snapshot) {
return ListView.builder(
padding: EdgeInsets.all(8),
itemCount: snapshot.data == null ? 0 : snapshot.data.length,
itemBuilder: (BuildContext context, int index) {
return Dismissible(
key: UniqueKey(),
background: DecoratedBox(
decoration: BoxDecoration(color: Colors.red),
child: Align(
alignment: Alignment(-0.9, 00),
child: Icon(
Icons.delete,
color: Colors.white,
),
),
),
direction: DismissDirection.startToEnd,
onDismissed: (direction) {
Attivita item = snapshot.data[index];
snapshot.data.removeAt(index);
delete(item);
},
child: Card(
child: ListTile(
title: Text(snapshot.data[index].nome, style: TextStyle(color: Colors.lightBlue[900]),),
onTap: () {
Navigator.pushNamed(context, DettaglioScreen.routeName, arguments: snapshot.data[index]);
},
onLongPress: () {
switchAndUpdate(snapshot.data[index]);
},
),
),
);
},
);
},
)
),
);
}
}
so i have to add some details, because it is written that "it looks like your post is mostly code; please add some more details"

Answer 1

To check if user put so data you can use:
Use sharedPreferences and store bool value if user entered data.
On initState check if database contains data if yes it means user put some data and you can hide button.
I don't use Sqlite in flutter but I think you can use
List<Map<String, dynamic>> result;
result = await db.query(tableName);
isNotData = result.isEmpty;
Or something similar :) You can do it
Choose one way and store bool value eg. in bool isNotData
When you will have bool value about data you can write:
In _CasaState above initState: bool isNotData;
and in Scaffold in floatingActionButton property:
Scaffold(
appBar: AppBar(
title: Text('Material App Bar'),
),
floatingActionButton: isNotData
? FloatingActionButton(
onPressed: () {},
)
: null,
body: Center(
),
),
),