美好的一天/晚上。
我正在尝试从 firebase 实时数据库中检索一些数据，当我将用户 UID 用作子级来获取数据时出现错误。
这是它的代码
void initState() {
DatabaseReference ref = FirebaseDatabase.instance.reference();
String userId = (FirebaseAuth.instance.currentUser).uid;
ref.child('User').child(userId).once().then((DataSnapshot snap ){
var keys = snap.value.keys;
var data = snap.value;
allData.clear();
for(var key in keys){
myData d = new myData(
data[key]['Full_Name'],
data[key]['Email'],
data[key]['Phone_Number'],
data[key]['Address']
);
allData.add(d);
}
setState(() {
print('Length:${allData.length}');
});
});
}
对于列表
Container(
height: data.size.height,
child: allData.length==0
? SpinKitFadingCircle(
color: Colors.white,
size: 150.0
)
:new ListView.builder(
itemBuilder: (_,index){
return Profile_UI(context,allData[index].Full_Name,allData[index].Email,allData[index].Phone_Number,allData[index].Address);
},
itemCount: allData.length,
),
),
这是所有的代码
class Profile extends StatefulWidget {
@override
_ProfileState createState() => _ProfileState();
}
class _ProfileState extends State<Profile> {
final AuthenticationService _auth = AuthenticationService();
final FirebaseAuth auth = FirebaseAuth.instance;
User user;
List<myData> allData = [];
@override
// ignore: must_call_super
void initState() {
DatabaseReference ref = FirebaseDatabase.instance.reference();
String userId = (FirebaseAuth.instance.currentUser).uid;
ref.child('User').child(userId).once().then((DataSnapshot snap ){
var keys = snap.value.keys;
var data = snap.value;
allData.clear();
for(var key in keys){
myData d = new myData(
data[key]['Full_Name'],
data[key]['Email'],
data[key]['Phone_Number'],
data[key]['Address']
);
allData.add(d);
}
setState(() {
print('Length:${allData.length}');
});
});
}
@override
Widget build(BuildContext context) {
final data = MediaQuery.of(context);
return Scaffold(
body: AnnotatedRegion<SystemUiOverlayStyle>(
value: SystemUiOverlayStyle.light,
child: GestureDetector(
onTap: () => FocusScope.of(context).unfocus(),
child: Stack(
children: <Widget>[
Container(
height: 600.0,
width: data.size.width,
child: SingleChildScrollView(
physics: AlwaysScrollableScrollPhysics(),
),
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [
Colors.cyan[700],
Color(0xFF61A4F1),
Color(0xFF478DE0),
Color(0xFF398AE5),
],
stops: [0.1, 0.4, 0.7, 0.9],
),
),
),
Container(
height: data.size.height,
child: allData.length==0
? SpinKitFadingCircle(
color: Colors.white,
size: 150.0
)
:new ListView.builder(
itemBuilder: (_,index){
return Profile_UI(context,allData[index].Full_Name,allData[index].Email,allData[index].Phone_Number,allData[index].Address);
},
itemCount: allData.length,
),
),
],
),
),
),
);
}
}
class _EditProfilePage extends StatefulWidget {
@override
__EditProfilePageState createState() => __EditProfilePageState();
}
class __EditProfilePageState extends State<_EditProfilePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).scaffoldBackgroundColor,
elevation: 1,
leading: IconButton(
icon: Icon(
Icons.arrow_back,
color: Colors.blueAccent,
),
onPressed: (){Navigator.of(context).pop(MaterialPageRoute(builder: (context)=>MenuTry()));},
),
),
body: Container(
padding: EdgeInsets.only(left: 16,top: 25,right: 16),
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [
Color(0xFF73AEF5),
Colors.blue.shade300,
Colors.blue.shade300,
Colors.blue.shade200,
],
stops: [0.1, 0.4, 0.7, 0.9],
),
),
child: GestureDetector(
onTap:() {FocusScope.of(context).unfocus();
},
child: ListView(
children: [
Text('Edit Profile', style: TextStyle(
fontSize: 25, fontWeight: FontWeight.w500,
),
),
SizedBox(
height: 15,
),
Center(
child: Stack(
children: [
Container(
width: 130,
height: 130,
decoration: BoxDecoration(
border: Border.all(
width: 4,
color: Theme.of(context).scaffoldBackgroundColor,
),
boxShadow: [
BoxShadow(
spreadRadius: 2, blurRadius: 10,
color: Colors.black.withOpacity(0.1),
offset: Offset(0,10)
),
],
shape: BoxShape.circle,
image: DecorationImage(
fit: BoxFit.cover,
image : NetworkImage("https://qph.fs.quoracdn.net/main-qimg-2b21b9dd05c757fe30231fac65b504dd")
),
),
),
Positioned(
bottom: 0,
right: 0,
child: Container(
height: 40,
width: 40,
decoration: BoxDecoration(
shape: BoxShape.circle,
border: Border.all(
width: 4,
color: Theme.of(context).scaffoldBackgroundColor,
),
color: Colors.white
),
child: IconButton(
onPressed: () => Navigator.of(context).push(MaterialPageRoute(builder: (context)=>ImagePick())),
icon: Icon(Icons.camera_alt,color: Colors.blueAccent),),
),)
],
),
),
SizedBox(
height: 35,
),
TextField(
decoration: InputDecoration(
contentPadding: EdgeInsets.only(bottom: 3),
labelText: "Full Name",
floatingLabelBehavior: FloatingLabelBehavior.always,
hintText: "",
hintStyle: TextStyle(
fontSize: 16, fontWeight: FontWeight.bold,
color: Colors.black,
),
),
),
SizedBox(
height: 35,
),
TextField(
decoration: InputDecoration(
contentPadding: EdgeInsets.only(bottom: 3),
labelText: "Email",
floatingLabelBehavior: FloatingLabelBehavior.always,
hintText: "",
hintStyle: TextStyle(
fontSize: 16, fontWeight: FontWeight.bold,
color: Colors.black,
),
),
),
SizedBox(
height: 35,
),
TextField(
decoration: InputDecoration(
contentPadding: EdgeInsets.only(bottom: 3),
labelText: "Address",
floatingLabelBehavior: FloatingLabelBehavior.always,
hintText: "",
hintStyle: TextStyle(
fontSize: 16, fontWeight: FontWeight.bold,
color: Colors.black,
)
),
),
SizedBox(
height: 35,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
OutlineButton(
color: Colors.green,
padding: EdgeInsets.symmetric(horizontal: 50),
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
onPressed: (){ Navigator.of(context).pushReplacement(MaterialPageRoute(builder: (context)=>MenuTry()));},
child: Text("CANCEL",style: TextStyle(
fontSize: 14, letterSpacing: 2.2, color: Colors.black,
),),
),
SizedBox(
height: 35,
),
OutlineButton(
color: Colors.green,
padding: EdgeInsets.symmetric(horizontal: 50),
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
onPressed: (){
Navigator.push(context, MaterialPageRoute(builder: (context)=>ImagePick()));
},
child: Text("SAVE",style: TextStyle(
fontSize: 14, letterSpacing: 2.2, color: Colors.black,
),),
),
],
)
],
),
),
),
);
}
}
class AlwaysDisabledFocusNode extends FocusNode {
@override
bool get hasFocus => false;
}
Widget Profile_UI(BuildContext context,String Full_Name,String Email,String Phone_Number,String Address) {
final data = MediaQuery.of(context);
return Container(
height: data.size.height,
padding: EdgeInsets.symmetric(
horizontal: 40.0,
vertical: 40.0,
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'Profile',
style: TextStyle(
color: Colors.white,
fontFamily: 'OpenSans',
fontSize: 30.0,
fontWeight: FontWeight.bold,
),
),
SizedBox(height: 30.0),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'Your Full Name',
style: kLabelStyle,
),
SizedBox(height: 10.0),
Container(
alignment: Alignment.centerLeft,
decoration: kBoxDecorationStyle,
height: 60.0,
child: TextFormField(
initialValue: '$Full_Name',
enableInteractiveSelection: false,
focusNode: new AlwaysDisabledFocusNode(),
keyboardType: null,
style: TextStyle(
color: Colors.white,
fontFamily: 'OpenSans',
),
decoration: InputDecoration(
border: InputBorder.none,
contentPadding: EdgeInsets.only(top: 14.0),
prefixIcon: Icon(
Icons.account_box_rounded,
color: Colors.white,
),
hintText: 'No Data Available',
hintStyle: kHintTextStyle,
),
),
),
],
),
SizedBox(height: 20,),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'Your Email',
style: kLabelStyle,
),
SizedBox(height: 10.0),
Container(
alignment: Alignment.centerLeft,
decoration: kBoxDecorationStyle,
height: 60.0,
child: TextFormField(
initialValue: '$Email',
enableInteractiveSelection: false,
focusNode: new AlwaysDisabledFocusNode(),
keyboardType: null,
style: TextStyle(
color: Colors.white,
fontFamily: 'OpenSans',
),
decoration: InputDecoration(
border: InputBorder.none,
contentPadding: EdgeInsets.only(top: 14.0),
prefixIcon: Icon(
Icons.email,
color: Colors.white,
),
hintText: 'No Data Available',
hintStyle: kHintTextStyle,
),
),
),
],
),
SizedBox(height: 20,),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'Your Phone Number',
style: kLabelStyle,
),
SizedBox(height: 10.0),
Container(
alignment: Alignment.centerLeft,
decoration: kBoxDecorationStyle,
height: 60.0,
child: TextFormField(
initialValue: '$Phone_Number',
enableInteractiveSelection: false,
focusNode: new AlwaysDisabledFocusNode(),
keyboardType: null,
style: TextStyle(
color: Colors.white,
fontFamily: 'OpenSans',
),
decoration: InputDecoration(
border: InputBorder.none,
contentPadding: EdgeInsets.only(top: 14.0),
prefixIcon: Icon(
Icons.phone_android_rounded,
color: Colors.white,
),
hintText: 'No Data Available',
hintStyle: kHintTextStyle,
),
),
),
],
),
SizedBox(height: 20,),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'Your Address',
style: kLabelStyle,
),
SizedBox(height: 10.0),
Container(
alignment: Alignment.centerLeft,
decoration: kBoxDecorationStyle,
height: 60.0,
child: TextFormField(
initialValue: '$Address',
enableInteractiveSelection: false,
focusNode: new AlwaysDisabledFocusNode(),
keyboardType: null,
style: TextStyle(
color: Colors.white,
fontFamily: 'OpenSans',
),
decoration: InputDecoration(
border: InputBorder.none,
contentPadding: EdgeInsets.only(top: 14.0),
prefixIcon: Icon(
Icons.location_pin,
color: Colors.white,
),
hintText: 'No Data Available',
hintStyle: kHintTextStyle,
),
),
),
],
),
],
),
);
}
这是所有的错误日志
W/DynamiteModule( 6389): Local module descriptor class for providerinstaller not found.
I/DynamiteModule( 6389): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller( 6389): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
W/System ( 6389): Ignoring header X-Firebase-Locale because its value was null.
W/System ( 6389): Ignoring header X-Firebase-Locale because its value was null.
D/FirebaseAuth( 6389): Notifying id token listeners about user ( xFM1dsh9BON1eWlIQYMQd96CI7H3 ).
E/flutter ( 6389): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: type 'String' is not a subtype of type 'int' of 'index'
E/flutter ( 6389): #0 _ProfileState.initState.<anonymous closure> (package:mainflutter/screens/main_menu/profile.dart:40:18)
E/flutter ( 6389): #1 _rootRunUnary (dart:async/zone.dart:1198:47)
E/flutter ( 6389): #2 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter ( 6389): #3 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
E/flutter ( 6389): #4 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
E/flutter ( 6389): #5 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
E/flutter ( 6389): #6 Future._completeWithValue (dart:async/future_impl.dart:529:5)
E/flutter ( 6389): #7 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:40:15)
E/flutter ( 6389): #8 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:311:13)
E/flutter ( 6389): #9 Query.once (package:firebase_database/src/query.dart)
E/flutter ( 6389): <asynchronous suspension>
E/flutter ( 6389): #10 _ProfileState.initState (package:mainflutter/screens/main_menu/profile.dart:34:33)
E/flutter ( 6389): #11 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4812:57)
E/flutter ( 6389): #12 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4649:5)
E/flutter ( 6389): #13 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3615:14)
E/flutter ( 6389): #14 Element.updateChild (package:flutter/src/widgets/framework.dart:3377:20)
E/flutter ( 6389): #15 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6171:14)
E/flutter ( 6389): #16 Element.updateChild (package:flutter/src/widgets/framework.dart:3367:15)
E/flutter ( 6389): #17 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6171:14)
E/flutter ( 6389): #18 Element.updateChild (package:flutter/src/widgets/framework.dart:3367:15)
E/flutter ( 6389): #19 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4700:16)
E/flutter ( 6389): #20 Element.rebuild (package:flutter/src/widgets/framework.dart:4369:5)
E/flutter ( 6389): #21 StatelessElement.update (package:flutter/src/widgets/framework.dart:4756:5)
E/flutter ( 6389): #22 Element.updateChild (package:flutter/src/widgets/framework.dart:3367:15)
E/flutter ( 6389): #23 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4700:16)
E/flutter ( 6389): #24 Element.rebuild (package:flutter/src/widgets/framework.dart:4369:5)
E/flutter ( 6389): #25 StatelessElement.update (package:flutter/src/widgets/framework.dart:4756:5)
E/flutter ( 6389): #26 Element.updateChild (package:flutter/src/widgets/framework.dart:3367:15)
E/flutter ( 6389): #27 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4700:16)
E/flutter ( 6389): #28 Element.rebuild (package:flutter/src/widgets/framework.dart:4369:5)
E/flutter ( 6389): #29 ProxyElement.update (package:flutter/src/widgets/framework.dart:5033:5)
E/flutter ( 6389): #30 Element.updateChild (package:flutter/src/widgets/framework.dart:3367:15)
E/flutter ( 6389): #31 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4700:16)
E/flutter ( 6389): #32 Element.rebuild (package:flutter/src/widgets/framework.dart:4369:5)
E/flutter ( 6389): #33 ProxyElement.update (package:flutter/src/widgets/framework.dart:5033:5)
E/flutter ( 6389): #34 Element.updateChild (package:flutter/src/widgets/framework.dart:3367:15)
E/flutter ( 6389): #35 RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:5693:32)
E/flutter ( 6389): #36 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6293:17)
E/flutter ( 6389): #37 Element.updateChild (package:flutter/src/widgets/framework.dart:3367:15)
E/flutter ( 6389): #38 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4700:16)
E/flutter ( 6389): #39 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4847:11)
E/flutter ( 6389): #40 Element.rebuild (package:flutter/src/widgets/framework.dart:4369:5)
E/flutter ( 6389): #41 StatefulElement.update (package:flutter/src/widgets/framework.dart:4879:5)
E/flutter ( 6389): #42 Element.updateChild (package:flutter/src/widgets/framework.dart:3367:15)
E/flutter ( 6389): #43 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4700:16)
E/flutter ( 6389): #44 Element.rebuild (package:flutter/src/widgets/framework.dart:4369:5)
E/flutter ( 6389): #45 ProxyElement.update (package:flutter/src/widgets/framework.dart:5033:5)
E/flutter ( 6389): #46 Element.updateChild (package:flutter/src/widgets/framework.dart:3367:15)
E/flutter ( 6389): #47 Compon
任何帮助都会很可爱，谢谢。