Can';t将Firebase存储映像的Url添加到实时数据库
在这个应用程序中,我可以通过相机或从Gallery上传图片,然后将其传递给提供商。我想将该图像上传到Firebase存储,然后将其图像Url与其他字符串和双类型信息一起存储在实时数据库中。但我似乎无法做到这一点,因为数据似乎是在处理图像url之前上传到实时数据库中的。图像仍正确上载到存储器中。 下面是我的提供者类的代码 相关的方法是uploadPic()和addPlace()Can';t将Firebase存储映像的Url添加到实时数据库,firebase,flutter,dart,firebase-storage,Firebase,Flutter,Dart,Firebase Storage,在这个应用程序中,我可以通过相机或从Gallery上传图片,然后将其传递给提供商。我想将该图像上传到Firebase存储,然后将其图像Url与其他字符串和双类型信息一起存储在实时数据库中。但我似乎无法做到这一点,因为数据似乎是在处理图像url之前上传到实时数据库中的。图像仍正确上载到存储器中。 下面是我的提供者类的代码 相关的方法是uploadPic()和addPlace() 导入'dart:io'; 导入“dart:convert”; 导入“package:path/path.dart”作为路
导入'dart:io';
导入“dart:convert”;
导入“package:path/path.dart”作为路径;
进口“包装:颤振/基础.dart”;
进口“包装:颤振/材料.省道”;
将“package:http/http.dart”导入为http;
导入“包:firebase_存储/firebase_存储.dart”;
导入“../models/place.dart”;
使用ChangeNotifier为MyPlaces初始化{
列表_位置=[];
列出你要去的地方{
返回[…_个位置];
}
Future fetchAndSetPlaces()异步{
const url='my firebase url';
试一试{
最终响应=等待http.get(url);
最终extractedData=json.decode(response.body)作为映射;
最终列表loadedPlaces=[];
extractedData.forEach((id,数据){
loadedPlaces.add(地点)(
id:id,
cropName:data['cropName'],
imageUrl:data['imageUrl'],
地点:地点(
纬度:数据[‘纬度’],
经度:数据[‘经度’],
//地址:数据['address'],
),
));
_地点=装载地点;
notifyListeners();
});
}捕获(错误){
投掷误差;
}
}
未来地址(字符串cropName、文件映像、位置loc)异步{
const url='my firebase url';
字符串imageUrl;
等待上传图片(图片,图片URL);
试一试{
最终响应=等待http.post(url,正文:json.encode({
“cropName”:cropName,
“imageUrl”:imageUrl,
“纬度”:位置纬度,
“经度”:位置经度,
}));
最终新地点=地点(
id:json.decode(response.body)['name'],
cropName:cropName,
imageUrl:imageUrl,
地点:loc,
);
_地点。添加(新地点);
notifyListeners();
}捕获(错误){
投掷误差;
}
}
放置findPlaceById(字符串id){
返回_places.firstWhere((place)=>place.id==id);
}
将来的上传pic(pickedImage,imageUrl)异步{
StorageReference firebaseStorageRef=FirebaseStorage.instance.ref().child('chats/${Path.basename(pickeImage.Path)}});
StorageUploadTask uploadTask=firebaseStorageRef.putFile(pickeImage);
等待上载Task.onComplete;
打印(“文件上传!”);
firebaseStorageRef.getDownloadURL()。然后((fileUrl){
imageUrl=fileUrl;
});
notifyListeners();
}
}
我在submitForm()方法的表单页中调用addplace()方法
导入'dart:io';
进口“包装:颤振/材料.省道”;
导入“包:provider/provider.dart”;
导入“../models/place.dart”;
导入“../providers/my_places.dart”;
导入“../widgets/image_input.dart”;
导入“../widgets/location_input.dart”;
导入“../widgets/custom_drawer.dart”;
导入“../screens/my_geo_tags_screen.dart”;
类AddNewPlaceScreen扩展StatefulWidget{
静态常量routeName='/add_new_place_screen';
@凌驾
_AddNewPlaceScreenState createState()=>\u AddNewPlaceScreenState();
}
类_AddNewPlaceScreenState扩展状态{
地点当前地点;
final _cropNameController=TextEditingController();
文件_pickedImage;
位置_picked位置;
void selectImage(文件图像){
设置状态(){
_PickeImage=图像;
});
}
void selectLocation(双横、双长){
_pickedLocation=位置(
纬度:纬度,
经度:长,
);
}
void _submitForm(){
如果(_cropNameController.text==null | | |(u pickedImage==null | | |)(u pickedLocation==null){
返回;
}
Provider.of(context.addPlace(_cropNameController.text,_pickedImage,_pickedLocation);
Navigator.of(context.pop();
}
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
标题:文本(“添加新地理标记”,样式:Theme.of(context.textTheme.title),
iconTheme:IconThemeData(颜色:Colors.amber),
),
抽屉:CustomDrawer(),
正文:SingleChildScrollView(
子:容器(
填充:边缘设置。全部(20),
子:列(
儿童:[
文本字段(
样式:TextStyle(
颜色:主题。背景。原色,
),
装饰:输入装饰(
边框:大纲输入边框(
边界半径:边界半径。圆形(5),
),
labelText:“作物名称”,
标签样式:文本样式(
颜色:主题。背景。原色,
),
),
控制器:_cropname控制器,
),
尺寸箱(高度:15),
图像输入(选择图像),
尺寸箱(高度:15),
位置输入(选择位置),
],
),
),
),
浮动操作按钮:浮动操作按钮(
背景色:主题。背景色,
子:图标(
图标。保存,
颜色:主题。背景。原色,
),
已按下:(){
_submitForm();
Navigator.of(context.pushReplacementNamed(MyGeoTagsScreen.routeName);
},
),
);
}
}
我认为您需要等待firebaseStorageRef.getDownloadURL()。然后((fileUrl){
在Future uploadPic
中。我相信,混合等待和。然后可能会导致问题。因此,请尝试删除。然后简单地执行此语句imageUrl=a
import 'dart:io';
import 'dart:convert';
import 'package:path/path.dart' as Path;
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:firebase_storage/firebase_storage.dart';
import '../models/place.dart';
class MyPlaces with ChangeNotifier {
List<Place> _places = [];
List<Place> get places {
return [..._places];
}
Future<void> fetchAndSetPlaces() async {
const url = 'my firebase url';
try {
final response = await http.get(url);
final extractedData = json.decode(response.body) as Map<String,dynamic>;
final List<Place> loadedPlaces = [];
extractedData.forEach((id, data) {
loadedPlaces.add(Place(
id: id,
cropName: data['cropName'],
imageUrl: data['imageUrl'],
location: Location(
latitude: data['latitude'],
longitude: data['longitude'],
//address: data['address'],
),
));
_places = loadedPlaces;
notifyListeners();
});
} catch(error) {
throw error;
}
}
Future<void> addPlace(String cropName, File image, Location loc) async {
const url = 'my firebase url';
String imageUrl;
await uploadPic(image, imageUrl);
try {
final response = await http.post(url, body: json.encode({
'cropName' : cropName,
'imageUrl' : imageUrl,
'latitude' : loc.latitude,
'longitude' : loc.longitude,
}));
final newPlace = Place(
id: json.decode(response.body)['name'],
cropName: cropName,
imageUrl: imageUrl,
location: loc,
);
_places.add(newPlace);
notifyListeners();
} catch (error) {
throw error;
}
}
Place findPlaceById(String id) {
return _places.firstWhere((place) => place.id == id);
}
Future uploadPic(pickedImage, imageUrl) async {
StorageReference firebaseStorageRef = FirebaseStorage.instance.ref().child('chats/${Path.basename(pickedImage.path)}}');
StorageUploadTask uploadTask = firebaseStorageRef.putFile(pickedImage);
await uploadTask.onComplete;
print("File uploaded!");
firebaseStorageRef.getDownloadURL().then((fileUrl) {
imageUrl = fileUrl;
});
notifyListeners();
}
}
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../models/place.dart';
import '../providers/my_places.dart';
import '../widgets/image_input.dart';
import '../widgets/location_input.dart';
import '../widgets/custom_drawer.dart';
import '../screens/my_geo_tags_screen.dart';
class AddNewPlaceScreen extends StatefulWidget {
static const routeName = '/add_new_place_screen';
@override
_AddNewPlaceScreenState createState() => _AddNewPlaceScreenState();
}
class _AddNewPlaceScreenState extends State<AddNewPlaceScreen> {
Place currentPlace;
final _cropNameController = TextEditingController();
File _pickedImage;
Location _pickedLocation;
void selectImage(File image) {
setState(() {
_pickedImage = image;
});
}
void selectLocation(double lat, double long) {
_pickedLocation = Location(
latitude: lat,
longitude: long,
);
}
void _submitForm() {
if (_cropNameController.text == null || _pickedImage == null || _pickedLocation == null) {
return;
}
Provider.of<MyPlaces>(context).addPlace(_cropNameController.text, _pickedImage, _pickedLocation);
Navigator.of(context).pop();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Add new Geo Tag", style: Theme.of(context).textTheme.title),
iconTheme: IconThemeData(color: Colors.amber),
),
drawer: CustomDrawer(),
body: SingleChildScrollView(
child: Container(
padding: EdgeInsets.all(20),
child: Column(
children: <Widget>[
TextField(
style: TextStyle(
color: Theme.of(context).primaryColor,
),
decoration: InputDecoration(
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(5),
),
labelText: "Name of the crop",
labelStyle: TextStyle(
color: Theme.of(context).primaryColor,
),
),
controller: _cropNameController,
),
SizedBox(height: 15),
ImageInput(selectImage),
SizedBox(height: 15),
LocationInput(selectLocation),
],
),
),
),
floatingActionButton: FloatingActionButton(
backgroundColor: Theme.of(context).accentColor,
child: Icon(
Icons.save,
color: Theme.of(context).primaryColor,
),
onPressed: () {
_submitForm();
Navigator.of(context).pushReplacementNamed(MyGeoTagsScreen.routeName);
},
),
);
}
}