我正在发送一个http发布请求，我需要传递4个变量（值）名称，移动电话号码，纬度和经度，但是我收到一个错误，无法设置内容类型为“ application / json”的请求的正文字段如果我删除了"content-type" : "application/json"，那么它将显示错误415状态代码。
Register.dart
class Register extends StatefulWidget {
@override
_RegisterState createState() => _RegisterState();
}
class _RegisterState extends State<Register> {
final _formKey = GlobalKey<FormState>();
static String _locationMessage1 = "";
static String _locationMessage2 = "";
String value;
final TextEditingController nameController=TextEditingController();
final TextEditingController mobileController=TextEditingController();
void _getCurrentLocation() async{
final position=await Geolocator().getCurrentPosition(desiredAccuracy: LocationAccuracy.best);
print(position);
setState(() {
_locationMessage1="${position.latitude}";
_locationMessage2="${position.longitude}";
});
}
GoogleMapController _controller;
Position position;
Future<UserRegister> createUser(String name,String mobile,String latitude,String longitude) async{
final String apiUrl="http://cashback.us-east-2.elasticbeanstalk.com/user/register";
final response=await http.post(apiUrl,body: json.encode({
"name": name,
"mobile": mobile,
"lat": latitude,
"lng": longitude,
}),headers: {"content-type" : "application/json",
"Accept": "application/json",}
);
if(response.statusCode==201){
final responseString=response.body;
return userRegisterFromJson(responseString);
}else{
return null;
}
}
UserRegister _userRegister;
@override
Widget build(BuildContext context) {
return PlatformScaffold(
body: Form(
key: _formKey,
child: ListView(
children: <Widget>[
Column(
children: <Widget>[
Row(
children: <Widget>[
GestureDetector(
onTap: (){
Navigator.pop(context);
},
child: Icon(
Icons.close,
size: 40.0,
),
),
],
),
Padding(
padding: const EdgeInsets.all(10.0),
child: Center(
child: new ListView(
shrinkWrap: true,
children: <Widget>[
Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 20.0),
child: TextFormField(
keyboardType: TextInputType.text,
controller: nameController,
style: new TextStyle(color: Colors.black),
validator: (val)=>val.length==0?"Enter Your Name":null,
decoration: new InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
),
focusedErrorBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.redAccent),
),
hintText: "Name",
fillColor: Colors.grey[200],
filled: true,
),
),
),
Padding(
padding: const EdgeInsets.only(top: 20.0),
child: TextFormField(
keyboardType: TextInputType.phone,
controller: mobileController,
onChanged: (text){
value=text;
},
style: new TextStyle(color: Colors.black),
validator: (val)=>val.length==0?"Enter Your Mobile Number":null,
decoration: new InputDecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.blue),
),
focusedErrorBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.redAccent),
),
hintText: "Mobile Number",
fillColor: Colors.grey[200],
filled: true,
),
),
),
Padding(
padding: const EdgeInsets.only(top: 20.0),
child: PlatformButton(
onPressed: () {
_getCurrentLocation();
},
child: Text('Get Current Location',style: TextStyle(color: Colors.white),),
androidFlat: (_) => MaterialFlatButtonData(
color: Colors.cyan
),
ios: (_) => CupertinoButtonData(
color: Colors.cyan
)
),
),
Padding(
padding: const EdgeInsets.only(top: 10.0),
child: Text(
_locationMessage1,
),
),
Padding(
padding: const EdgeInsets.only(top: 10.0),
child: Text(
_locationMessage2,
),
),
Padding(
padding: const EdgeInsets.only(top: 15.0),
child: Center(
child: PlatformButton(
onPressed: () async{
final String name=nameController.text;
final String mobile=mobileController.text;
final UserRegister userRegister=await createUser(name, mobile, _locationMessage1, _locationMessage2);
setState(() {
_userRegister=userRegister;
});
},
child: Text('Register',style: TextStyle(color: Colors.white),),
androidFlat: (_) => MaterialFlatButtonData(
color: Colors.cyan
),
ios: (_) => CupertinoButtonData(
color: Colors.cyan
)
),
),
),
_userRegister==null?Container():
Center(child: Text("${_userRegister.user.name} ${_userRegister.user.mobile} ${_userRegister.user.lat} ${_userRegister.user.lng}")),
],
)
],
),
),
),
],
),
],
),
),
);
}
}
UserRegister.dart
UserRegister userRegisterFromJson(String str) => UserRegister.fromJson(json.decode(str));
String userRegisterToJson(UserRegister data) => json.encode(data.toJson());
class UserRegister {
User user;
Driver driver;
UserRegister({
this.user,
this.driver,
});
factory UserRegister.fromJson(Map<String, dynamic> json) => UserRegister(
user: User.fromJson(json["user"]),
driver: Driver.fromJson(json["driver"]),
);
Map<String, dynamic> toJson() => {
"user": user.toJson(),
"driver": driver.toJson(),
};
}
class Driver {
int driverId;
User user;
String deliveryCount;
String totalMoney;
String totalMoneyWithdraw;
int creationDate;
int updateDate;
Driver({
this.driverId,
this.user,
this.deliveryCount,
this.totalMoney,
this.totalMoneyWithdraw,
this.creationDate,
this.updateDate,
});
factory Driver.fromJson(Map<String, dynamic> json) => Driver(
driverId: json["driverId"],
user: User.fromJson(json["user"]),
deliveryCount: json["deliveryCount"],
totalMoney: json["totalMoney"],
totalMoneyWithdraw: json["totalMoneyWithdraw"],
creationDate: json["creationDate"],
updateDate: json["updateDate"],
);
Map<String, dynamic> toJson() => {
"driverId": driverId,
"user": user.toJson(),
"deliveryCount": deliveryCount,
"totalMoney": totalMoney,
"totalMoneyWithdraw": totalMoneyWithdraw,
"creationDate": creationDate,
"updateDate": updateDate,
};
}
class User {
int userId;
String name;
String mobile;
String token;
int lat;
int lng;
bool isDriver;
bool admin;
bool mobileVaild;
bool isLock;
bool isPanding;
int creationdate;
User({
this.userId,
this.name,
this.mobile,
this.token,
this.lat,
this.lng,
this.isDriver,
this.admin,
this.mobileVaild,
this.isLock,
this.isPanding,
this.creationdate,
});
factory User.fromJson(Map<String, dynamic> json) => User(
userId: json["userId"],
name: json["name"],
mobile: json["mobile"],
token: json["token"],
lat: json["lat"],
lng: json["lng"],
isDriver: json["isDriver"],
admin: json["admin"],
mobileVaild: json["mobileVaild"],
isLock: json["isLock"],
isPanding: json["isPanding"],
creationdate: json["creationdate"],
);
Map<String, dynamic> toJson() => {
"userId": userId,
"name": name,
"mobile": mobile,
"token": token,
"lat": lat,
"lng": lng,
"isDriver": isDriver,
"admin": admin,
"mobileVaild": mobileVaild,
"isLock": isLock,
"isPanding": isPanding,
"creationdate": creationdate,
};
}
为如下所示的帖子正文传递json编码器的地图。