I have this code in my build:
XFile? file;
...
body: Container(
color: Colors.black,
child: SizedBox(
height: MediaQuery.of(context).size.width,
width: MediaQuery.of(context).size.width,
child: AspectRatio(
aspectRatio: 1,
child: GestureDetector(
onTap: () => editPhoto(),
child: Image.file(File(file!.path))), //here is the line with problems
),
),
)
With my editPhoto() method, I modify the file whose path is read in my Image.file, but in my screen I still see the old image before the edit. Now, I know for sure that the file has effectively changed because in another part of my code I can see the changes, so the problem is that Image.file doesn't update. How can I solve?
Related
I'm new to flutter and trying to build an editing app using ColorFiltered Class in flutter the changes are reflected while editing the image but not reflected when I try to save the image to the gallery (Only the unedited image is getting saved).
Below is the code which helps to display the image while editing.
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
SizedBox(
height: MediaQuery.of(context).size.width,
width: MediaQuery.of(context).size.width,
child: AspectRatio(
aspectRatio: 1,
child: buildImage(),
),
),
],
)
),
Below is the code inside the buildImage() function which is called being called.
Widget buildImage() {
return ColorFiltered(
colorFilter: ColorFilter.matrix(calculateContrastMatrix(con)),
child: ColorFiltered(
colorFilter: ColorFilter.matrix(calculateSaturationMatrix(sat)),
child: Image.file(
_imageFile,
height: 400,
width: 250,),
),
);
}
And below is the code where I'm trying to savw the image.
TextButton(
child: const Text('Save Image'),
onPressed: () async {
final imageBytes = await _imageFile.readAsBytes();
final result = await ImageGallerySaver.saveImage(imageBytes);
},
Note I'm trying to update the _imageFile using setState.
void initState() {
super.initState();
_imageFile = File(widget.image.path);
}
Thank you.
I want the changes made through ColorFiltered class to be reflected on the saved image also.
After downloading the app through the apk release, in the first time, it works normally. But once you close the app and open it again, the ui elements disappears. It has a very strange behavior, if I restart the device, it works in the first time the app is open (after the restart), and after closing it, it doens't work again.
This only happens in the release version, debugging works as expected.
I am using Getx, I don't see a relation since I have already develop other apps with this structure. This is the code of the first page loaded.
return Container(
constraints: BoxConstraints(minWidth: Get.width, minHeight: Get.height),
decoration: BoxDecoration(
color: Theme.of(context).primaryColor,
image: DecorationImage(
opacity: 0.35,
repeat: ImageRepeat.repeat,
image: AssetImage(AppConstants.assets.background_image),
),
),
child: Scaffold(
backgroundColor: Colors.transparent,
body: Container(
child: SingleChildScrollView(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
SizedBox(
width: Get.width,
height: Get.height * 0.45,
child: Center(
child: Padding(
padding: const EdgeInsets.only(top: 80.0),
child: SizedBox(
width: Get.width * 0.8,
height: Get.height * 0.3,
child: Image.asset(AppConstants.assets.logo_image),
),
),
),
),
SizedBox(
height: Get.height * 0.55,
child: TabBarView(
controller: controller.tabController,
physics: NeverScrollableScrollPhysics(),
children: [
TelephoneTab(),
CodeTab(),
],
),
),
],
),
),
),
),
);
I have tried removing the background image by removing the Container before the Scaffold entirely, removing every element in the UI and adding just a small button in the middle. Updating my kotlin.
Tried running with flutter run --release. No logs.
May be the same thing as this.
Flutter doctor is fine.
The problem seems to be something related to the Scaffold and the Container with the background image. Elements outside the Scaffold were drawn as usual.
I changed the first page of the app in order to go directly to the HomePage and it worked fine, even logging out to the LoginPage.
Then I tried creating a SplashPage before the LoginPage, initially, I used the same structure with the Container, BoxDecoration, and Scaffold. The problem was happening again, but this time in the SplashPage, everything inside the Scaffold was invisible with the same behavior as mentioned above.
After that, I simply define the extendBody as true in the Scaffold of the SplashPage and the problem stopped occurring.
I don't exactly understand what this changes. Feel free to add an explanation to this answer.
I am wondering if it is possible to repeat an actual icon widget like the image I have attached.
Currently getting this result using ImageRepeat but would like to be able to use and actual icon so it can be modular and the icon can change.
( the repeating image can currently change but I don't want to have to create 100 images of icons. )
Current Solution:
SizedBox.expand(
child: Image.asset(
_backGroundImage,
repeat: ImageRepeat.repeat,
)),
try Wrap:
Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
color: Colors.orange,
child: Wrap(
children: List<Widget>.generate(2000, (int index) {
return Icon(Icons.add);
}),
),
),
I am trying to get a text label with graphics over the image. Labels like new arrival, best seller, limited, on sale just like on the pic attached.
enter image description here
Here's what i think the skeletal layout would be :
return Stack(
children: [
Card(
color: Colors.black54,
child: Image.asset('assets/xyz.png'),
),
Align(
//for bottomRight
alignment: Alignment.bottomRight,
child: Image.asset(
'assets/fireimg.png',
), //can be an SVG converted to png
),
Align(
//for topLeft
alignment: Alignment.topLeft,
child: Image.asset(
'assets/label.png',
), //can be an SVG converted to png
),
],
);
Feel free to give the Padding of your choice.
it has so much code to write , so i will give some examples to achieve that output
in this image ,i mentioned 0 and one .
for all 1
solution 1
you can use image like this way
Stack(
children: [
Container(
width: 200,
height: 200,
color: Colors.amber,// added only for view this example
child:Image() // add Product image here
),
Positioned(
top: 20, //change according to your use case position
left: 0,// change according to your use case position
child: Container(
color: Colors.black, // added only for view this example
decoration: BoxDecoration(image: ),// add label image here
width: 100,
height: 50,
child: Row(
children: [Text('hi')],
),
))
],
)
solution 2
you can use custom paint for label layout
not that
in both solution you have to use stack and position widgets , you can control position according to your use case
for all 0
you can use RotationTransition widgets to achieve this
not that
you have to use stack and position widgets , you can control position according to your use case
for the vertical Text
use this example
String exText = "meta";
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('hi'),
),
body: Container(
width: 200,
height: 200,
color: Colors.amber,
child: Column(
children: exText.characters
.map((e) => Container(
child: Text('$e'),
))
.toList()),
),
out put will be
How can I assign an image dynamically in flutter ? For example:
final topContent = Stack(
children: <Widget>[
Container(
padding: EdgeInsets.only(left: 10.0),
height: MediaQuery.of(context).size.height * 0.5,
decoration: new BoxDecoration(
image: new DecorationImage(
image: new AssetImage(lesson.imagePath),
fit: BoxFit.cover,
),
)),
Container(
height: MediaQuery.of(context).size.height * 0.5,
padding: EdgeInsets.all(40.0),
width: MediaQuery.of(context).size.width,
decoration: BoxDecoration(color: Color.fromRGBO(58, 66, 86, .9)),
child: SingleChildScrollView(
controller: _scrollController,
child: Center(
child: topContentText,
),
),
),
Positioned(
left: 8.0,
top: 60.0,
child: InkWell(
onTap: () {
Navigator.pop(context);
},
child: Icon(Icons.arrow_back, color: Colors.white),
),
)
],
);
Now the image at the start lesson.imagePath is what I want to change dynamically. I tried to use setState() but it gives me an error:
The expression here is a type of void and cannot be used
image: setState ((){
if (someCondition) {
return new AssetImage(lesson.imagePath);
}
}),
Your setState call is wrong! The most simple way is make your image as state of your widget and update this image inside a setState call. setState method does not returns nothing it just rebuilds your widget.
In your _WidgetState class you declare as member:
AssetImage _imageToShow;
You can provider a initial image inside initState method.
#override
initState(){
_imageToShow = AssetImage('youAssetImage');
}
Your Container widget should be declared as:
Container(
padding: EdgeInsets.only(left: 10.0),
height: MediaQuery.of(context).size.height * 0.5,
decoration: new BoxDecoration(
image: new DecorationImage(
image: _imageToShow,
fit: BoxFit.cover,
),
)),
),
And to update your image with setState call you just need:
void updateImage() {
setState ((){
if (someCondition) {
_imageToShow = new AssetImage(lesson.imagePath);
}
});
}
But remember that something has to call updateImage method.
The above solution can work also you can set an array of names and you can set the same image name in the assets folder and you can dynamically select the image where you want to use.
suppose in your case you have a list of lessons.
var lesson = ['a','b','c'];
In assets, folder give the same name to the images. (Don't forget to update the pubspec.yaml file)
Then in the AssetImage you can give the path which can be chosen dynamically.
image:AssetImage('assets/${lesson[index]}.jpg')
Remember to give the same name to the image like here a,b and c to the image.
Also the same extension to be given like here .jpg
image:AssetImage('assets/${lesson[index]}.jpg')