I have implmented image picker, it is working great on both ios and android.
However, after i have captured an image, it is taking quite long for it to appear on my Image.file(image) widget.
I cannot decrease the quality of image, as it matters in the app.
So i need something like CachedNetworkImage but to load from file, not from internet, any ideas?
I just want to show an progress bar or indicator, just to let the user know that there is a process.
File? image;
Future pickImage(ImageSource source, BuildContext context) async {
try {
final image = await ImagePicker().pickImage(source: source);
if (image == null) return;
var imageTemporary = File(image.path);
if (source == ImageSource.camera) {
final img.Image? capturedImage =
img.decodeImage(await File(image.path).readAsBytes());
final img.Image orientedImage = img.bakeOrientation(capturedImage!);
imageTemporary =
await File(image.path).writeAsBytes(img.encodeJpg(orientedImage));
}
setState(() {
this.image = imageTemporary;
});
} on PlatformException catch (e) {print(e.toString());}
}
Thats my function to call image picker.
And passing it to ElevatedButton like:
Related
i am uploading image to Firebase storage, so i want to show the progress in the notification Tray....
Future<bool> imageBannerPick(BuildContext context, ImageSource source) async {
final pickedFile = await picker.pickImage(source: source);
if (pickedFile == null) {
return false;
}
File image = File(pickedFile.path);
String uploadString = await uploadingFile(uploadFile: image);
//storing the string to your profile
await firestore.collection('users').doc(auth.currentUser?.uid).update({
'backBannerPicture': uploadString,
});
return true;
}
now my problem how to show the progress of the uploading in the notification tray...
i can't get images file through image picker in flutter.
void _getImage() async {
print("getImage");
final ImagePicker picker = ImagePicker();
XFile? image = await picker.pickImage(source: ImageSource.gallery);
print(image);
}
and error's occur, look at this
enter image description here
my enviroment is M1 pro, ios15.2
Try this
_getImage(BuildContext context) async {
var picture = await ImagePicker().pickImage(source: ImageSource.gallery);
setState(() {
imageFile = File(picture!.path);
dirPath = picture.path;
print('path');
print(dirPath);
});
}
I have this function to save image from gallery and display it as a background:
Future _getImage() async {
// ImagePicker picker = ImagePicker();
PickedFile pickedFile = await picker.getImage(source: ImageSource.gallery);
if (pickedFile == null) return;
File tmpFile = File(pickedFile.path);
tmpFile = await tmpFile.copy(tmpFile.path);
setState(() {
if (pickedFile != null) {
//_image = File(pickedFile.path);
_image = tmpFile;
print('_image: $_image');
} else {
print('No image selected');
}
});
}
but after I invoke it, it says that the image is empty:
File: '/data/user/0/com.app.flutter/cache/image_picker5156338879856055740.jpg' is empty and cannot be loaded as an image.
I'm not sure what's happening here, since it prints the image in the console fine like this:
_image: File: '/data/user/0/com.app.flutter/cache/image_picker5156338879856055740.jpg
so it means that it is in the cache, but for some reason it returns as empty and won't add the image to the background:
decoration: BoxDecoration(
image: DecorationImage(
image: _image == null
? MemoryImage(kTransparentImage)
: FileImage(_image),
fit: BoxFit.cover,
added the build just in case there is an error there, but I don't think there is. Basically I just need the image from gallery to be persistent and stay in the app.
EDIT: Added the setState() to the code, but it is still not persistent, there must be something I'm missing:
Future _getImage() async {
// ImagePicker picker = ImagePicker();
PickedFile pickedFile = await picker.getImage(source: ImageSource.gallery);
if (pickedFile == null) {
return null;
}
Directory appDirectory = await getApplicationDocumentsDirectory();
File newImage = File(appDirectory.path + 'fileName');
newImage.writeAsBytes(File(pickedFile.path).readAsBytesSync());
setState(() {
_image = newImage;
print(newImage.path + ' test');
});
}
Try this
Future _getImage() async {
ImagePicker picker = ImagePicker();
final pickedFile = await picker.getImage(source: ImageSource.gallery);
if (pickedFile == null) {
return null;
}
Directory appDirectory = await getApplicationDocumentsDirectory();
File newImage = File(appDirectory.path + 'fileName');
await newImage.writeAsBytes(File(pickedFile.path).readAsBytesSync());
setState(() {
_image = newImage;
});
}
Nevermind, I managed to make it persistent with SharedPreferences, I simply made two different functions, each to save or load the image, and added _loadImage() to initState
void _saveImage(path) async {
SharedPreferences saveImage = await SharedPreferences.getInstance();
saveImage.setString('imagepath', path);
print('Image Saved!');
void _loadImage() async {
SharedPreferences saveImage = await SharedPreferences.getInstance();
setState(() {
_imagepath = saveImage.getString('imagepath');
});
}
I build a for loop in Flutter on which I make some stuff with many images:
for (var i = 0; i < resultList.length; i++) {
File imageFile = await _getImageFileFromAssets(resultList[i]);
final appDir = await syspath.getApplicationDocumentsDirectory();
final fileName = path.basename(imageFile.path);
final savedImage =
await File(imageFile.path).copy('${appDir.path}/$fileName');
// Creating thumbnails
final thumb =
image.decodeImage(File(savedImage.path).readAsBytesSync());
final thumbImage = image.copyResize(thumb, width: 500);
new File('${appDir.path}/$fileName-thumb-500.jpg')
.writeAsBytesSync(image.encodeJpg(thumbImage));
final finalThumbImage =
File('${appDir.path}/$fileName-thumb-500.jpg');
picturesData.add(Picture(
album: albumID,
path: savedImage.path,
thumbPath: finalThumbImage.path,
timestamp: Timestamp.now()));
setState(() {
loadingScreen = true;
});
}
While the loop is working, I show a loading screen Widget with an loading animation:
return loadingScreen == true ? LoadingScreen() : Scaffold()
What I expect A clean loading screen while the for loop duration with smooth animation
What I get Extreme flickering and lagging on the animation. After each image was edited, the animation stops. So I get something like a stop motion animation.
What could be the issue here?
My flutter app crashes when pressing of back button while picking an image.How can I solve that?
Here is Image picking part
_openGallery(BuildContext context) async{
var picture = await ImagePicker.pickImage(source: ImageSource.gallery);
this.setState((){
imageFile = picture;
});
if (picture==null) {
Navigator.of(context).pop();
} else{
final File newImage = await imageFile.copy('$_localPath/name.jpg');
}
Navigator.of(context).pop();
}