I have an implementation of imagePicker working with the mobile portion of my app, but i am currently trying to make it work on web too. Im getting an image with the following code:
ImagePicker _picker = ImagePicker();
final XFile? _image = await _picker.pickImage(
source: ImageSource.gallery,
imageQuality: 50,
);
if (_image == null) {
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text('No image was selected.')));
}
if (_image != null) {
var f = await _image.readAsBytes();
StorageRepository()
.updateImage(user, _image, index);
}
Which leads to my confusion. My current storage method looks like this:
Future<void> uploadImageWeb(User user, XFile image, int? index) async {
try {
await storage
.ref('${user.id}/${image.name}')
.putFile(
File(image.path),
)
.then(
(p0) => FirestoreRepository().updateUserPictures(
user,
image.name,
index,
),
);
} catch (err) {
print(err);
}
}
Which obviously i cant use xfile, i have to use the Uint8List. But how do i read any data from that in a meaningful way to upload it to the storage bucket?
Thanks!
Related
Following a tutorial for adding and saving images and getting errors for the below code, under ImagePicker, ImageSource and SelectedImage.
Future getImage() async {
var image = await ImagePicker.PickImage(source: ImageSource.camera);
setState(() {
selectedimage = image;
});
}
You need to create an instance first, then you will be able to use pickImage method.
Future getImage() async {
XFile? image = await ImagePicker().pickImage(source: ImageSource.camera);
if (image != null) {
setState(() {
selectedimage = image;
});
}
}
Fine more about image_picker
You have to be careful whenever playing with the setState() functions. This combined with how you pick the image and how you store it in the 'var' in your case could cause further trouble. To generally ease things up for further use I recommend creating a utils class, in which you would have an image picker method, just like this one:
import 'package:image_picker/image_picker.dart';
pickImage(ImageSource source) async {
final ImagePicker _imagePicker = ImagePicker();
XFile? _file = await _imagePicker.pickImage(source: source);
if (_file != null) {
return await _file.readAsBytes();
}
print('No Image Selected');
}
Afterwards, if you would like to call that in any other instance you would need something like this, though this is for a url image(I had it in hand), such as:
void selectImage() async {
Uint8List? im = await pickImage(ImageSource.gallery);
final ByteData imageData = await NetworkAssetBundle(Uri.parse(
"url for template image"))
.load("");
final Uint8List bytes = imageData.buffer.asUint8List();
// if null - use the template image
im ??= bytes;
// update state
setState(() {
_image = im!;
});
}
Hope it helped in a way.
The Following Code is used to Upload any image from gallery/Camera to Firebase storage. I was successful in uploading the image to storage along with meta data. Now the problem is I am not able to get the download URL of the uploaded image. Tried a lot but didn't find any solution.
FirebaseStorage storage = FirebaseStorage.instance;
final picker = ImagePicker();
PickedFile pickedImage;
File imageFile;
Future<void> _upload(String inputSource) async {
try {
pickedImage = await picker.getImage(
source: inputSource == 'camera'
? ImageSource.camera
: ImageSource.gallery,
maxWidth: 1920);
final String fileName = path.basename(pickedImage.path);
imageFile = File(pickedImage.path);
try {
// Uploading the selected image with some custom meta data
await storage.ref(fileName).putFile(
imageFile,
SettableMetadata(
customMetadata: {
'uploaded_by': 'A bad guy',
'description': 'Some description...'
},
),
);
// Refresh the UI
setState(() {});
} on FirebaseException catch (error) {
print(error);
}
} catch (err) {
print(err);
}
}
Hope You're Doing Well …
You Can Try This Method To Get The URL Of The Image(Any File) From Firebase Storage To Firebase Store And Then You Can Retrieve Image .
class _UploadAdState extends State<UploadAdPage> {
final formKey = GlobalKey<FormState>();
File _myimage;
String imgUrl;
Future getImage1(File chosenimage) async {
PickedFile img =
await ImagePicker.platform.pickImage(source: ImageSource.gallery);
if (chosenimage == null) return null;
File selected = File(img.path);
setState(() {
_myimage = chosenimage;
});
}
// changing the firestore rules and deleteing if request.auth != null;
sendData() async {
// to upload the image to firebase storage
var storageimage = FirebaseStorage.instance.ref().child(_myimage.path);
UploadTask task1 = storageimage.putFile(_myimage);
// to get the url of the image from firebase storage
imgUrl1 = await (await task1).ref.getDownloadURL();
// you can save the url as a text in you firebase store collection now
}
}
I am using in my app this function. Pass image file and download with getDownloadUrl .
Future <String> _uploadphotofile(mFileImage) async {
final Reference storageReference = FirebaseStorage.instance.ref().child("products");
UploadTask uploadTask = storageReference.child("product_$productId.jpg").putFile(imgfile);
String url = await (await uploadTask).ref.getDownloadURL();
return url;
}
I have a function to upload image to the server. However the widgets starts rebuilding while the image is being uploaded and does not execute code after image is uploaded.
InkWell(
child: Icon(
Icons.camera,
size: 50,
color: Colors.red[400],
),
onTap: () {
_imageFile =
_picker.getImage(source: ImageSource.camera);
_imageFile.then((file) async {
if (file != null) {
fileName = file.path.toString();
var res = await Auth.uploadImage(file);
print("Response for image upload is : ");
print(res);
await setUserData();
}
});
},
)
This is the output on the console from print statements
I/flutter (10171): Calling build Method
I/Timeline(10171): Timeline: Activity_launch_request time:68831133
I/flutter (10171): Uploading image to server
I/flutter (10171): Calling build Method
I/flutter (10171): Image uploaded successfully
As can be seen above no other code is executed and the widget has rebuilt itself. What am I possibly doing wrong?
_imageFile = _picker.getImage(source: ImageSource.camera);
its not right, getImage is an Asynchronous function so you need to wait for it to finish.
do this - _imageFile = await _picker.getImage(source: ImageSource.camera);
If you want to use then do it like this,
_picker.getImage(source: ImageSource.camera).then((image)...your code...)
That's because when you're using _imageFile = _picker.getImage(source: ImageSource.camera); the _imageFile result will come in the future and your next code is executed.
You can fixed the problem either using await:
onTap: () async {
_imageFile =
await _picker.getImage(source: ImageSource.camera);
if (_imageFile != null) {
fileName = file.path.toString();
var res = await Auth.uploadImage(file);
print("Response for image upload is : ");
print(res);
await setUserData();
}
},
Or keep using then with a slight change:
onTap: () {
_picker.getImage(source: ImageSource.camera)
.then((file) async {
if (file != null) {
fileName = file.path.toString();
var res = await Auth.uploadImage(file);
print("Response for image upload is : ");
print(res);
await setUserData();
}
});
},
See explanation about await & then: Async/Await/then in Dart/Flutter
Here is a what's happening : I'm trying to upload an image from gallery to my app on iOS simulator. Image Picker opens the gallery but can't select an image and return to app. Here's my simple code:
File _image;
final picker = ImagePicker();
Future getImage() async {
final pickedFile = await picker.getImage(source: ImageSource.gallery);
setState(() {
if (pickedFile != null) {
_image = File(pickedFile.path);
} else {
print('No image selected.');
}
});
}
and my widget:
body: Center(
child: _image != null ? Image.file(_image) : Text('no Image'),
),
Thank you all in advance
For the iOS, as stated in the documentation, you'll need some config in the native side relating to permission:
Add the following keys to your Info.plist file, located in /ios/Runner/Info.plist:
NSPhotoLibraryUsageDescription - describe why your app needs permission for the photo library. This is called Privacy - Photo Library Usage Description in the visual editor.
NSCameraUsageDescription - describe why your app needs access to the camera. This is called Privacy - Camera Usage Description in the visual editor.
NSMicrophoneUsageDescription - describe why your app needs access to the microphone, if you intend to record videos. This is called Privacy - Microphone Usage Description in the visual editor.
Other than that, it should work perfectly fine with your code. The image should be fit within a Flexible like this, or maybe a SizedBox to avoid overflowing:
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
void main() {
runApp(MaterialApp(
home: SampleScreen(),
));
}
class SampleScreen extends StatefulWidget {
#override
_SampleScreenState createState() => _SampleScreenState();
}
class _SampleScreenState extends State<SampleScreen> {
File _image;
final picker = ImagePicker();
Future getImage() async {
final pickedFile = await picker.getImage(source: ImageSource.gallery);
setState(() {
if (pickedFile != null) {
_image = File(pickedFile.path);
} else {
print('No image selected.');
}
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
FlatButton(onPressed: () => getImage(), child: Text('Press me')),
Flexible(child: _image != null ? Image.file(_image) : Text('no Image')),
],
),
),
);
}
}
File _image;
String _image1 = "";
Future getImage() async {
final pickedFile = await picker.getImage(source: ImageSource.gallery);
setState(() {
if (pickedFile != null) {
_image1 = pickedFile.path;
_image = File(pickedFile.path);
print(json.encode(_image1));
print("file path...");
} else {
print('No image selected.');
}
});
}
In my case, I update my Image picker library from 0.6.3 to 0.8.4
hope this helps anyone.
You need to add the user permissions(key) and add the purpose(values) of these in info.plist file in iOS module.
Add the following keys to your Info.plist file, located in /ios/Runner/Info.plist:
NSPhotoLibraryUsageDescription - describe why your app needs permission for the photo library. This is called Privacy - Photo Library Usage Description in the visual editor.
NSCameraUsageDescription - describe why your app needs access to the camera. This is called Privacy - Camera Usage Description in the visual editor.
dependencies:
image_picker: ^0.8.4+4
import 'package:image_picker/image_picker.dart';
final picker = ImagePicker();
Future pickImage() async {
setState(() {
picselected1 = false;
});
ImagePicker picker = ImagePicker();
PickedFile pickedFile;
pickedFile = await picker.getImage(
source: ImageSource.gallery,
);
setState(() {
if (pickedFile != null) {
picselected1 = true;
// _images.add(File(pickedFile.path));
_image = File(pickedFile.path); // Use if you only need a single picture
} else {
print('No image selected.');
}
});
}
For everyone still dealing with this problem
Please not this in the image_picker documentary and make sure you tested it on a real device:
Starting with version 0.8.1 the iOS implementation uses PHPicker to
pick (multiple) images on iOS 14 or higher. As a result of
implementing PHPicker it becomes impossible to pick HEIC images on the
iOS simulator in iOS 14+. This is a known issue. Please test this on a
real device, or test with non-HEIC images until Apple solves this
issue
My app crashes when calling "_submit" function 2 times in a row.
I can pick the picture from gallery and upload it to Firebase Storage but if I call it again the the whole app crashes.
From this button :
floatingActionButton: FloatingActionButton(
onPressed: () => _submit(),
Submit calls a Provider of type Database :
Future<void> _submit() async {
widget.database = Provider.of<Database>(context, listen: false);
await widget.database
.setPicture("regione/citta/comune/lavoro/IDArtista/profilo.png");
return;
}
That calls a function that uploads a picture taken from "imgGallery()" to the database :
Future<void> setPicture(String pathStorage) async {
try {
final File file = await imgFromGallery();
if (file == null) return;
TaskSnapshot task =
await FirebaseStorage.instance.ref(pathStorage).putFile(file);
String image_url = await task.ref.getDownloadURL();
return;
} catch (e) {
print(e);
return;
}
}
imgGallery :
Future<File> imgFromGallery() async {
try {
final ImagePicker _picker = ImagePicker();
final PickedFile imageFile =
await _picker.getImage(source: ImageSource.gallery, imageQuality: 50);
//If there is no image selected, return.
if (imageFile == null) return null;
//File created.
File tmpFile = File(imageFile.path);
//it gives path to a directory - path_provider package.
final appDir = await getApplicationDocumentsDirectory();
//filename - returns last part after the separator - path package.
final fileName = tmpFile.path.split('/').last;
//copy the file to the specified directory and return File instance.
return tmpFile = await tmpFile.copy('${appDir.path}/$fileName');
} catch (e) {
print(e);
return null;
}
}
EDIT : Solved using a real device instead of emulators.
Which device are you experiencing this in? I'm also having this error but only on iOS emulator. It has to do with the Image_Picker package and the FocusNode. Look at this issue on github