I am newbie in flutter, trying to put picked videos in a ListView or GridView. How can I put compressed videos in ListView.builder with the code below :
Future<void> _videoPicker() async {
if (mounted) {
final file = await ImagePicker.pickVideo(source: ImageSource.gallery);
if (file?.path != null) {
final thumbnail = await _flutterVideoCompress.getThumbnail(
file.path,
quality: 50,
position: -1,
);
setState(() {
_videoImage = thumbnail;
});
final resultFile = await _flutterVideoCompress.getThumbnailWithFile(
file.path,
quality: 50,
position: -1,
);
debugPrint(resultFile.path);
assert(resultFile.existsSync());
debugPrint('file Exists: ${resultFile.existsSync()}');
final MediaInfo info = await _flutterVideoCompress.compressVideo(
file.path,
deleteOrigin: false,
quality: VideoQuality.LowQuality,
);
debugPrint(info.toJson().toString());
}
}
}
To use Listview.builder you need a List to make listview form it, or you can use just Listview Widget to manually make your Listview
ListView Widget
Related
I want to add the function which can upload multiple Photo image via ImagePicker
In this code, I can just upload single photo, not mutiple.
This app operating by flutter, dart and firebase server.
[Code]
void dispose() {
textEditingController.dispose();
super.dispose();
}
File _image;
Future _getImage() async {
var image = await ImagePicker.pickImage(
source: ImageSource.gallery,
maxWidth: 1000,
maxHeight: 1000,
);
setState(() {
_image = image;
});
}
Future _uploadFile(BuildContext context) async {
if (_image != null) {
final firebaseStorageRef = FirebaseStorage.instance
.ref()
.child('post')
.child('${DateTime.now().millisecondsSinceEpoch}.png');
final task = firebaseStorageRef.putFile(
_image,
StorageMetadata(contentType: 'image/png'),
);
final storageTaskSnapshot = await task.onComplete;
final downloadUrl = await storageTaskSnapshot.ref.getDownloadURL();
await Firestore.instance.collection('post').add(
{
'contents': textEditingController.text,
'displayName': widget.user.displayName,
'email': widget.user.email,
'photoUrl': downloadUrl,
'userPhotoUrl': widget.user.photoUrl,
});
}
final images = await _picker.pickMultiImage(
maxHeight: 1024,
maxWidth: 1024,
imageQuality: 50,
);
I created here 3 functions used to pick files from imagePicker and to upload them to firebase storage.
first, pick images from gallery:
final imageFiles = await pickImages();
second, upload the images:
final path = 'path/where/you/want/to/save/your/images';
final imageUrls = uploadImages(imagesFiles, path)
print(imageUrls);
you can now use the images urls to save to firestore
Future<List<File>> pickeImages() async {
ImagePicker picker = ImagePicker();
final images = await picker.pickMultiImage(
maxHeight: 1000, maxWidth: 1000, imageQuality: 90);
List<File> files = [];
if (images == null || images.isEmpty) return [];
for (var i = 0; i < images.length; i++) {
final file = File(images[i].path);
files.add(file);
}
return files;
}
Future<String?> _uploadImageFile(File file, String path) async {
try {
final storage = FirebaseStorage.instance;
TaskSnapshot? taskSnapshot;
final storageRef = storage.ref().child(path);
final uploadTask = storageRef.putFile(file);
taskSnapshot = await uploadTask.whenComplete(() {});
final imageUrl = await taskSnapshot.ref.getDownloadURL();
return imageUrl;
} catch (e) {
throw Exception(e.toString());
}
}
Future<List<String>> uploadImages(
List<File> files,
String path,
) async {
final urls = <String>[];
try {
if (files.isNotEmpty) {
for (var i = 0; i < files.length; i++) {
final file = files[i];
final imagePath = '$path/${Random().nextInt(10000)}.jpg';
final url = await _uploadImageFile(file, imagePath);
urls.add(url!);
}
}
return urls;
} on FirebaseException {
rethrow;
}
}
Instead of using ImagePicker.pickImage, use ImagePicker.pickMultiImage. That gives you a List instead of an XFile. Then you can just upload all images in the list. For instance, add an image parameter to your _uploadFile Function so that its function signature is
Future _uploadFile(BuildContext context, XFile image)
and just upload all images like
for (final image of images) {
_uploadFile(context, image)
}
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!
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
I am new to flutter, i am building an app where i need to convert the file(image) generated after using image_picker package to asset image to use in the app.
example code as follows, which creates file(Image)
final Function onSelectImage;
ImageInput(this.onSelectImage);
File _storedImage;
Future<void> _takePicture() async {
final imageFile = await ImagePicker.pickImage(
source: ImageSource.camera,
maxWidth: 600,
);
if (imageFile == null) {
return;
}
setState(() {
_storedImage = imageFile;
});
final appDir = await syspaths.getApplicationDocumentsDirectory();
final fileName = path.basename(imageFile.path);
final savedImage = await imageFile.copy('${appDir.path}/$fileName');
widget.onSelectImage(savedImage);
}
Thanks in advance
You can create an image variable which you can rever to and update when you selected the image.
See the following code:
final Function onSelectImage;
ImageInput(this.onSelectImage);
File _storedImage;
Image _tempImage;
Future<void> _takePicture() async {
final imageFile = await ImagePicker.pickImage(
source: ImageSource.camera,
maxWidth: 600,
);
if (imageFile == null) {
return;
}
setState(() {
_storedImage = imageFile;
});
final appDir = await syspaths.getApplicationDocumentsDirectory();
final fileName = path.basename(imageFile.path);
final savedImage = await imageFile.copy('${appDir.path}/$fileName');
widget.onSelectImage(savedImage);
setState(() {
_tempImage = imageFile;
});
}
#override
Widget build(BuildContext context) {
return _tempImage == null ? Container(child:null) : Image(image: _tempImage);
}
I'm new in Flutter and can't get image_picker to open a picture from gallery.
It opens Gallery, but when I tap on a picture, just close gallery
My code is like this.. what i'm missing?
File _imagenTemporal;
var imagen;
Future getImagen(String opcion) async {
if (opcion == "camara") {
imagen = await ImagePicker.pickImage(source: ImageSource.camera);
} else if (opcion == "galeria") {
imagen = await ImagePicker.pickImage(source: ImageSource.gallery);
}
setState(() {
_imagenTemporal = imagen;
}
);
}
ImagePicker is just a FileChooser function that returns a Future<File> widget when the user selects a File from the gallery or takes a picture. You should use the returned file to construct an Image.file widget:
Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
child: showSelectedImage();
),
Future<Image> showSelectedImage() async {
_imagenTemporal = await ImagePicker.pickImage(source: ImageSource.gallery);
return Image.file(_imageTemporal);
}