I'm unable to load images to my app although I tried many solutions
my code is
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
backgroundColor: Colors.amber,
appBar: AppBar(
backgroundColor: Colors.amber[900],
title: const Text("hi"),
),
body: Image(image: AssetImage("images/ab.png"),
),
),
);
}
}
this is my pubspec.yaml
flutter doctor
1- I used $ flutter clean and then $ flutter pub get.
2- I updated flutter SDK.
3- I mention only the folder (images).
4- I used a smaller image.
5- I restarted my laptop.
6- I run my code in another IDE.
but nothing is working for me, so can anyone help me?
thanks in advance
I copied your main.dart code, I created a images folder with a .png file.
I think the problem could be the position of the images folder, you should place it beside the lib folder.
Without seeing the project folder structure I cannot be sure, but if you do it like that your code should work fine.
Here's the pubspec.yaml:
flutter:
assets:
- images/
Here's a screenshot of the your code running:
In my app's homepage I call a ScoreListPageBody that is rebuild when I change the Locale from another page (SettingsPage).
To force rebuild it, it contains a StreamBuilder that is triggered when the Locale changes and the users goes back to the HomePage (using Navigator.push(....).then(() => triggerStream())).
It works very well when I do this in my HomePage :
return Scaffold(
appBar: MenuAppBar(),
body: PageView(
controller: this._pageController,
children: [
ScoreListPageBody(),
FavoritesListPageBody(),
],
)
);
But this prevents the rebuild of ScoreListPageBody's StreamBuilder :
return Scaffold(
appBar: MenuAppBar(),
body: PageView(
controller: this._pageController,
children: const [
ScoreListPageBody(),
FavoritesListPageBody(),
],
)
);
I do not understand why, as const modifier should not impact the StreamBuilder's behavior, right ?
So, it works without const, but is it an issue to report to Flutter team ?
The const modifier impact the StreamBuilder because this is inside ScoreListPageBody() and you put the modifier in the PageView which is one step above the tree.
- PageView
-- ScoreList()
-- ...
I have an app with lots of Lottie animations. They work fine in a Windows UWP app and AirBnB sample Android app. Also look fine in lottiefiles.com online test tool.
But they are glitchy in Flutter using Lottie for Flutter package. Not all of them, but many, maybe around a third.
Full source code below, you can try for yourself.
Glitches are either frame overlaps or blinking, as if there is a gap between frames.
Glitches are consistent, i.e. always happen in the same place, so does not seem like a performance issue.
Also, they are not happening between repeats, but in the middle of the animation, so again not an application issue but seems to be the issue with how they are rendered.
I have tried loading them as composition from memory with a controller. I have also tried a vanilla asset load to rule out issues with my implementation, and they are behaving the same. The issue appears both in the emulator and the actual phone. So it seems to me it is not caused by the way I implemented but by the Lottie package itself, or perhaps an issue with Lottie JSON that for some reason only affects Android.
Full example is below. Just paste this into main.dart and add dependency to yaml: lottie: ^1.2.1.
import 'package:flutter/material.dart';
import 'package:lottie/lottie.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(),
darkTheme: ThemeData.dark(),
themeMode: ThemeMode.dark,
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Lottie Test"),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(
child: Lottie.network(
'https://assets6.lottiefiles.com/packages/lf20_uz92k22x.json'),
),
],
),
),
);
}
}
Try adding frameRate: FrameRate.max like stated below.
Expanded(
child: Lottie.network('https://assets6.lottiefiles.com/packages/lf20_uz92k22x.json',
frameRate: FrameRate.max,
),
),
this will render the Lottie animation with the same frame rate of that of the app. In Lottie plugin it will render the json as per the frame rate mentioned in the json file. An animation encoded with a 25 FPS will only be painted 25 times per seconds even though the AnimationController will invalidate the widget 60 times per seconds. Hence this framerate was introduced from Lottie 0.6.0
I use Lottie for Flutter on my applications and it works well also on emulator or on low-performance phones. The problem can be related to bad converted animations, or you can try to use Lottie.asset(yourjson) to avoid potential network fetch issues.
According to the official package documentation
For Flutter Web, run the app with: flutter run --web-renderer canvaskit
Works fine for me in the latest version: lottie: ^1.2.1
Hello and thank you in advance..
I am new to flutter and i want to make screen which i shown u...! Just look at the picture..i marked red color in that pic i have circle avater and when i tap on each i need to show there data on same page...no need to navigate to another screen...! Show that data on same page...! Plz help me provide me if there code u have
Something like this will work, you're basically creating your widget tree in a declarative way in flutter, the column will allow you to stack two separate widgets (your list and your grid). I recommend going through a few tutorials (starting here: https://flutter.dev/docs/get-started/codelab)on building an app, flutter comes really easy, then watch all the videos created by the flutter team on the different widgets. Everything is a widget and you will use each kind of widget to build your ui.
#override
Widget build(BuildContext context) {
return Stack(children: [
Positioned(
top: 20,
child: Column(
children: [
ListView(
children: [/*circle images*/],
),
GridView.count(
crossAxisCount: 10,
children: [/*profile images*/],
)
],
))
]);
}
I am developing Flutter app for the first time. I have an issue adding an image. I have a following questions:
Where to create an images folder?
Where to add assets tag in pubspec.ymal?
Is there any assets folder needed for this?
What I tried:
assets:
- images/lake.jpg
inside pubspec.ymal :
Full file :
name: my_flutter_app
description: A new Flutter application.
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^0.1.2
dev_dependencies:
flutter_test:
sdk: flutter
flutter:
uses-material-design: true,
assets:
- images/lake.jpg
Error log :
#/properties/flutter/properties/uses-material-design: type: wanted [boolean] got true,
Error detected in pubspec.yaml:
Error building assets
FAILURE: Build failed with an exception.
* Where:
Script '/home/abc/Downloads/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 435
* What went wrong:
Execution failed for task ':app:flutterBuildDebug'.
> Process 'command '/home/abc/Downloads/flutter/bin/flutter'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
* Get more help at https://help.gradle.org
BUILD FAILED in 1s
Finished with error: Gradle build failed: 1
My main.dart code :
// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/material.dart';
// Uncomment lines 7 and 10 to view the visual layout at runtime.
//import 'package:flutter/rendering.dart' show debugPaintSizeEnabled;
void main() {
//debugPaintSizeEnabled = true;
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
Widget titleSection = new Container(
padding: const EdgeInsets.all(32.0),
child: new Row(
children: [
new Expanded(
child: new Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
new Container(
padding: const EdgeInsets.only(bottom: 8.0),
child: new Text(
'Oeschinen Lake Campground',
style: new TextStyle(
fontWeight: FontWeight.bold,
),
),
),
new Text(
'Kandersteg, Switzerland',
style: new TextStyle(
color: Colors.grey[500],
),
),
],
),
),
new Icon(
Icons.star,
color: Colors.red[500],
),
new Text('41'),
],
),
);
Column buildButtonColumn(IconData icon, String label) {
Color color = Theme.of(context).primaryColor;
return new Column(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.center,
children: [
new Icon(icon, color: color),
new Container(
margin: const EdgeInsets.only(top: 8.0),
child: new Text(
label,
style: new TextStyle(
fontSize: 12.0,
fontWeight: FontWeight.w400,
color: color,
),
),
),
],
);
}
Widget buttonSection = new Container(
child: new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
buildButtonColumn(Icons.call, 'CALL'),
buildButtonColumn(Icons.near_me, 'ROUTE'),
buildButtonColumn(Icons.share, 'SHARE'),
],
),
);
Widget textSection = new Container(
padding: const EdgeInsets.all(32.0),
child: new Text(
'''
Lake Oeschinen lies at the foot of the Blüemlisalp in the Bernese Alps. Situated 1,578 meters above sea level, it is one of the larger Alpine Lakes. A gondola ride from Kandersteg, followed by a half-hour walk through pastures and pine forest, leads you to the lake, which warms to 20 degrees Celsius in the summer. Activities enjoyed here include rowing, and riding the summer toboggan run.
''',
softWrap: true,
),
);
return new MaterialApp(
title: 'Flutter Demo',
home: new Scaffold(
appBar: new AppBar(
title: new Text('Top Lakes'),
),
body: new ListView(
children: [
new Image.asset(
'images/lake.jpg',
width: 600.0,
height: 240.0,
fit: BoxFit.cover,
),
titleSection,
buttonSection,
textSection,
],
),
),
);
}
}
I am referring to this tutorial https://flutter.io/tutorials/layout/
Also, I want to ask if there are any tools for a clean rebuild in a flutter as I can't find any options for this.
How to include images in your app
1. Create an assets/images folder
This should be located in the root of your project, in the same folder as your pubspec.yaml file.
In Android Studio you can right click in the Project view
You don't have to call it assets or images. You don't even need to make images a subfolder. Whatever name you use, though, is what you will register in the pubspec.yaml file.
2. Add your image to the new folder
You can just copy your image into assets/images. The relative path of lake.jpg, for example, would be assets/images/lake.jpg.
3. Register the assets folder in pubspec.yaml
Open the pubspec.yaml file that is in the root of your project.
Add an assets subsection to the flutter section like this:
flutter:
assets:
- assets/images/lake.jpg
If you have multiple images that you want to include then you can leave off the file name and just use the directory name (include the final /):
flutter:
assets:
- assets/images/
Note: Make sure to use the exact number of spaces. That's 2 spaces per indentation.
4. Use the image in code
Get the asset in an Image widget with Image.asset('assets/images/lake.jpg').
The entire main.dart file is here:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text("Image from assets"),
),
body: Image.asset('assets/images/lake.jpg'), // <--- image
),
);
}
}
5. Restart your app
When making changes to pubspec.yaml I find that I often need to completely stop my app and restart it again, especially when adding assets. Otherwise I get a crash.
Running the app now you should have something like this:
Further reading
See the documentation for how to do things like provide alternate images for different densities.
Videos
The first video here goes into a lot of detail about how to include images in your app. The second video covers more about how to adjust how they look.
Flutter Tutorial - 1/2 Image - Deep Dive
Flutter Tutorial - 2/2 Image - Deep Dive
I think the error is caused by the redundant ,
flutter:
uses-material-design: true, # <<< redundant , at the end of the line
assets:
- images/lake.jpg
I'd also suggest to create an assets folder in the directory that contains the pubspec.yaml file and move images there and use
flutter:
uses-material-design: true
assets:
- assets/images/lake.jpg
The assets directory will get some additional IDE support that you won't have if you put assets somewhere else.
Create images folder in root level of your project.
Drop your image in this folder, it should look like
Go to your pubspec.yaml file, add assets header and pay close attention to all the spaces.
flutter:
uses-material-design: true
# add this
assets:
- images/profile.jpg
Tap on Packages get at the top right corner of the IDE.
Now you can use your image anywhere using
Image.asset("images/profile.jpg")
The problem is in your pubspec.yaml, here you need to delete the last comma.
uses-material-design: true,
To use image in Flutter. Do these steps.
1. Create a Directory inside assets folder named images. As shown in figure below
2. Put your desired images to images folder.
3. Open pubpsec.yaml file . And add declare your images.Like:--
4. Use this images in your code as.
Card(
elevation: 10,
child: Container(
decoration: BoxDecoration(
color: Colors.orangeAccent,
image: DecorationImage(
image: AssetImage("assets/images/dropbox.png"),
fit: BoxFit.fitWidth,
alignment: Alignment.topCenter,
),
),
child: Text("$index",style: TextStyle(color: Colors.red,fontSize: 16,fontFamily:'LangerReguler')),
alignment: Alignment.center,
),
);
An alternative way to put images in your app (for me it just worked that way):
1 - Create an assets/images folder
2 - Add your image to the new folder
3 - Register the assets folder in pubspec.yaml
4 - Use this code:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
var assetsImage = new AssetImage('assets/images/mountain.jpg'); //<- Creates an object that fetches an image.
var image = new Image(image: assetsImage, fit: BoxFit.cover); //<- Creates a widget that displays an image.
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text("Climb your mountain!"),
backgroundColor: Colors.amber[600], //<- background color to combine with the picture :-)
),
body: Container(child: image), //<- place where the image appears
),
);
}
}
Create your assets directory the same as lib level
like this
projectName
-android
-ios
-lib
-assets
-pubspec.yaml
then your pubspec.yaml like
flutter:
assets:
- assets/images/
now you can use Image.asset("/assets/images/")
--> Follow Below Steps One OR Multiple Image Insertion.:
-> Create 'assets/images' folder as in project module.
-> put images which you want.
-> use of image using this syntax. ex.
- Image.asset('assets/images/tony.jpg')
-> use image avatar which you want like, circle, square and much more as your need.
-> Open 'pubspec.yaml' file
-> write the code in 'flutter:' section. ex.
-------------------------------
uses-material-design: true
assets:
- assets/images/ // if multiple images you have then
- assets/images/imagename.extension // if single images you have then
-------------------------------
-> click on 'PUB GET' button which occurs on Right side of Screen above.
-> Run App.
-> if you get any issue then
-> Go to file -> Invalid caches/Restart -> Invalid Caches/Restart button
-> Done.
See Below Images to Get a Better idea of Implementation.
•• Here, add image file like below. ••
•• Here, add image file Description in PUBSPEC.YAML file like below. ••
Done.☻♥
When you adding assets directory in pubspec.yaml file give more attention in to spaces
this is wrong
flutter:
assets:
- assets/images/lake.jpg
This is the correct way,
flutter:
assets:
- assets/images/
their is no need to create asset directory and under it images directory and then you put image.
Better is to just create Images directory inside your project where pubspec.yaml exist and put images inside it
and access that images just like as shown in tutorial/documention
assets:
- images/lake.jpg // inside pubspec.yaml
If the image is inside a package dependency, you should also provide the package name, event if you are referencing the image from the same dependency!
Image.asset("assets/pics/events_empty.png", package: "ui_elements"),
Ref:
Asset images in package dependencies
Make sure you create the assets folder in the main directory, not in the lib folder.
you can rather use this to see access to everything inside assets, because there may be folders like images, logo, icon, etc...
create the assets folder in the root of the project
MyProject
android
assets
ios
lib
test
web
windows
.gitignore
pubspec.yaml
and in your pubspec.yaml, there are
assets:
# - images/a_dot_burr.jpeg
# - images/a_dot_ham.jpeg
replace the last two lines by the 'assets/' to be able to directly access everything inside assets
if you have directly images in assets
assets:
- assets/
or if you have sub folders in assets
assets:
- assets/folder1/
- assets/folder2/
- assets/folder3/
Create an assets/images folder and Add your image to the folder
Register the assets folder in pubspec.yaml
flutter:
assets:
- assets/images/placeholder_circle_image.png
If you have multiple images
flutter:
assets:
- assets/images/
Use the image in code
Image.asset(
'assets/images/item_entry/add_car_video.png',
width: 100,
height: 100,
fit: BoxFit.cover,
cacheWidth:100 * MediaQuery.of(context).devicePixelRatio.round(),
),
Error when comma is at the end of below line
uses-material-design: true,
when the line after assets: indent is not correct it throws below error
If the indent is corrected as shown in below, then error is fixed.
If the asset file is not added then it highlights that with yellowish background but Pub get doesn't throw error but there will be an error during installation.
In short, Code Indent and syntax is important
You can create a folder and reference it as shown