我需要此警报对话框才能在
中显示所选项目Widget _changePrPar() {
showDialog(
context: context,
builder: (BuildContext context) {
return SingleChildScrollView(
child: AlertDialog(
key: alertDialogKey,
title: ListTile(
leading: Icon(Icons.account_circle),
title: Text("Mon premier Dialogue"),
),
content: Form(
key: formKey,
child: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(
labelText: "Nom et Prenom",
hintText: "Ex. Ndoume Desmon"),
validator: (val) =>
val.isEmpty ? "The Name cannot be empty" : null,
onSaved: (val) => nomP = val,
),
TextFormField(
decoration: InputDecoration(
labelText: "User Name",
hintText: "Ex. desmon215"),
validator: (val) => val.isEmpty
? "The user name cannot be empty"
: null,
onSaved: (val) => pseudo = val),
//My Problems start here, the value selected does not appear,
ListTile(
title: Text(
"Gender",
style: TextStyle(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 9),
subtitle: DropdownButtonFormField<String>(
items: Sexe.map((l) => DropdownMenuItem(
child: Text(l),
value: l,
)).toList(),
value: sexyVal,
onSaved: (val) => sexyVal = val,
onChanged: (v) {
setState(() {
sexyVal = v;
});
},
),
),
TextFormField(
decoration: InputDecoration(
labelText: "Telephone",
hintText: "Ex. 654521455"),
validator: (val) =>
val.length > 9 && val.startsWith("6")
? null
: "The phoe number is not valid..",
onSaved: (val) => tel = val),
TextFormField(
decoration: InputDecoration(
labelText: "Email",
hintText: "Ex. abc@xyzer.com"),
validator: (val) =>
val.contains("@") && val.endsWith(".com")
? null
: "Invalid e-mail",
onSaved: (val) => mailP = val),
TextFormField(
controller: passCtl,
decoration: InputDecoration(
suffix: IconButton(
icon: Icon(
Icons.cancel,
color: Colors.grey,
),
onPressed: () {
passCtl.clear();
},
),
labelText: "PassWord",
hintText: "8 caracters minimum..",
),
maxLengthEnforced: true,
maxLength: 10,
obscureText: true,
validator: (val) =>
val.length < 8 ? "Password too short" : null,
onSaved: (val) => pass = val),
TextFormField(
controller: dateCtl,
decoration: InputDecoration(
suffix: IconButton(
icon: Icon(
Icons.cancel,
),
onPressed: () {
dateCtl.clear();
},
),
labelText: "Date of birth",
hintText: "Ex. Insert your dob",
),
onTap: () async {
DateTime date = DateTime(1900);
FocusScope.of(context).requestFocus(new FocusNode());
date = await showDatePicker(
context: context,
initialDate: DateTime.now(),
firstDate: DateTime(1900),
lastDate: DateTime(2100));
// pour calculer l'age a partir de la date de naissance
age = DateTime.now().difference(date).inDays;
Age = (age / 360).floor();
_date = date.toIso8601String();
dateCtl.text = _date.substring(0, 10);
},
onSaved: (val) => _date = Age.toString(),
),
],
),
),
actions: <Widget>[
FlatButton(
child: Text("Cancel"),
onPressed: () {
Navigator.of(context).pop();
},
),
FlatButton(
child: Text("Submit"),
onPressed: () {
final form = formKey.currentState;
if (form.validate()) {
setState(() {
form.save();
Navigator.of(context).pop();
});
}
},
)
],
),
);
});
}
答案 0 :(得分：0)
您只需要构建一个扩展input {
tcp {
port => 4560
codec => json_lines
}
}
的类，并将对话框的内容移动到build方法中，
StatefulWidget现在将其返回到class DialogContent extends StatefulWidget {
@override
_DialogContentState createState() => _DialogContentState();
}
class _DialogContentState extends State<DialogContent> {
@override
Widget build(BuildContext context) {
return SingleChildScrollView(
child: AlertDialog(
key: alertDialogKey,
title: ListTile(
leading: Icon(Icons.account_circle),
title: Text("Mon premier Dialogue"),
),
content: Form(
key: formKey,
child: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(
labelText: "Nom et Prenom",
hintText: "Ex. Ndoume Desmon"),
validator: (val) =>
val.isEmpty ? "The Name cannot be empty" : null,
onSaved: (val) => nomP = val,
),
TextFormField(
decoration: InputDecoration(
labelText: "User Name",
hintText: "Ex. desmon215"),
validator: (val) => val.isEmpty
? "The user name cannot be empty"
: null,
onSaved: (val) => pseudo = val),
//My Problems start here, the value selected does not appear,
ListTile(
title: Text(
"Gender",
style: TextStyle(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 9),
subtitle: DropdownButtonFormField<String>(
items: Sexe.map((l) => DropdownMenuItem(
child: Text(l),
value: l,
)).toList(),
value: sexyVal,
onSaved: (val) => sexyVal = val,
onChanged: (v) {
setState(() {
sexyVal = v;
});
},
),
),
TextFormField(
decoration: InputDecoration(
labelText: "Telephone",
hintText: "Ex. 654521455"),
validator: (val) =>
val.length > 9 && val.startsWith("6")
? null
: "The phoe number is not valid..",
onSaved: (val) => tel = val),
TextFormField(
decoration: InputDecoration(
labelText: "Email",
hintText: "Ex. abc@xyzer.com"),
validator: (val) =>
val.contains("@") && val.endsWith(".com")
? null
: "Invalid e-mail",
onSaved: (val) => mailP = val),
TextFormField(
controller: passCtl,
decoration: InputDecoration(
suffix: IconButton(
icon: Icon(
Icons.cancel,
color: Colors.grey,
),
onPressed: () {
passCtl.clear();
},
),
labelText: "PassWord",
hintText: "8 caracters minimum..",
),
maxLengthEnforced: true,
maxLength: 10,
obscureText: true,
validator: (val) =>
val.length < 8 ? "Password too short" : null,
onSaved: (val) => pass = val),
TextFormField(
controller: dateCtl,
decoration: InputDecoration(
suffix: IconButton(
icon: Icon(
Icons.cancel,
),
onPressed: () {
dateCtl.clear();
},
),
labelText: "Date of birth",
hintText: "Ex. Insert your dob",
),
onTap: () async {
DateTime date = DateTime(1900);
FocusScope.of(context).requestFocus(new FocusNode());
date = await showDatePicker(
context: context,
initialDate: DateTime.now(),
firstDate: DateTime(1900),
lastDate: DateTime(2100));
// pour calculer l'age a partir de la date de naissance
age = DateTime.now().difference(date).inDays;
Age = (age / 360).floor();
_date = date.toIso8601String();
dateCtl.text = _date.substring(0, 10);
},
onSaved: (val) => _date = Age.toString(),
),
],
),
),
actions: <Widget>[
FlatButton(
child: Text("Cancel"),
onPressed: () {
Navigator.of(context).pop();
},
),
FlatButton(
child: Text("Submit"),
onPressed: () {
final form = formKey.currentState;
if (form.validate()) {
setState(() {
form.save();
Navigator.of(context).pop();
});
}
},
)
],
),
);
});
}
}
showDialog