Popular New Releases in Widget
fullPage.js
fullPage.js 4.0.6
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Sortable
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Popular Libraries in Widget
by alvarotrigo 
javascript
33446 GPL-3.0
fullPage plugin by Alvaro Trigo. Create full screen pages fast and simple
by atlassian javascript
26467 NOASSERTION
Beautiful and accessible drag and drop for lists with React
by SortableJS javascript
24648 MIT
Reorderable drag-and-drop lists for modern browsers and touch devices. No jQuery or framework required.
by SortableJS javascript
21483 MIT
Create and reorder lists with drag-and-drop. For use with modern browsers and touch devices
by dimsemenov javascript
21204 MIT
JavaScript image gallery for mobile and desktop, modular, framework independent
by bevacqua javascript
20798 MIT
:ok_hand: Drag and drop so simple it hurts
by react-dnd typescript
17476 MIT
Drag and Drop for React
by SortableJS javascript
16883 MIT
Vue drag-and-drop component based on Sortable.js
by Shopify javascript
15911 MIT
The JavaScript Drag & Drop library your grandparents warned you about.
Trending New libraries in Widget
by clauderic typescript
4283 MIT
The modern, lightweight, performant, accessible and extensible drag & drop toolkit for React.
by elkowar rust
2364 MIT
ElKowars wacky widgets
by im3x javascript
1123
iOS14桌面组件神器（Scriptable）开发框架、教程、精美脚本分享
by isaacHagoel javascript
902 MIT
An action based drag and drop container for Svelte
by knadh javascript
766 MIT
A super tiny Javascript library to make DOM elements draggable and movable. ~500 bytes and no dependencies.
by Jean-Tinland javascript
639 MIT
A yabai status bar widget for Übersicht
by terrysahaidak typescript
589 MIT
Reanimated 2 powered gallery implementation
by gregordr typescript
570 Apache-2.0
Open source google photos alternative!
by mzeryck javascript
564
This is a Scriptable widget that lets you display, position, and format multiple elements, including dates and events, weather information, battery level, and more. You can even create your own elements.
Top Authors in Widget
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Trending Kits in Widget
JavaScript galleries are essential to many modern web applications and web pages. They enable you to present photographs and other material in an interactive, visually appealing manner, making your content more engaging and enticing to consumers. Numerous JavaScript gallery libraries are available, with features and capabilities ranging from simple image sliders to complicated 3D carousels and interactive grids.
JavaScript gallery libraries are robust tools that enable developers to construct visually appealing and functioning picture and video galleries for their websites. These libraries provide an immersive and compelling user experience with touch-enabled interfaces, flexible layouts, and animation effects.
Here is a list of the 8 Best JavaScript Gallery Libraries
Slick:
- Aides in displaying a carousel of product images, allowing users to move through the images using arrows and dots.
- Aides in creating a hero image slideshow with a call-to-action button and a fade-in/fade-out transition.
- With a center mode that zooms in on the currently selected logo, it makes it easier to display a collection of logos.
- Aides in creating a custom background image and text overlay for a quote carousel.
Photoswipe:
- Facilitates the display of a travel photo gallery with the ability to zoom in and rotate the image for greater detail.
- Aids in creating an image portfolio gallery with a customized user interface and buttons for navigation.
- Assists in displaying a slideshow of images that can be controlled with touch and arrow keys.
- Creates a custom loading animation and transition effect for a gallery of images.
Fancybox:
- Helps in Displaying product images on an e-commerce website with the ability to zoom in on the pictures for more detail.
- Helps create a gallery of portfolio images that can be clicked on to display a larger version with a caption.
- Helps in Displaying a gallery of images for a real estate website with the ability to navigate through the photos with a slideshow.
- Helps create a popup modal that displays a video that can control the playback.
LightGallery:
- Aids in creating a gallery of images with custom captions and buttons for social sharing.
- Facilitates displaying a collection of videos by providing a customized player interface and the capability to skip forward and backward through the video.
- Aids in creating a portfolio gallery with a masonry layout and the capability of categorizing the images.
- Assists in displaying a slideshow of images that can be controlled using keyboard arrows and touch gestures.
Bootstrap Image Gallery:
- Helps create a gallery of product images with the ability to zoom in on the pictures for more detail.
- Helps in Displaying a collection of images with a full screen slideshow that can be controlled with touch gestures.
- Helps create a gallery of videos with the ability to autoplay them and display a custom poster image.
- Helps in Displaying a collection of images with a thumbnail navigation bar at the bottom of the gallery.
BaguetteBox:
- Helps in Displaying a gallery of images with a custom zoom and pan functionality.
- Helps create a portfolio gallery with a justified layout and a custom caption for each image.
- Helps in Displaying a collection of product images with a lightbox interface for viewing the photos in more detail.
- Helps create a gallery of images with a custom loading animation and transition effect.
Galleria:
- Aids in creating an image gallery with a full-screen layout and the capability of using arrows and dots to move through the images.
- Enables displaying a collection of product images with a call-to-action button and custom thumbnail navigation bar.
- Facilitates the creation of a video gallery with a customized player interface and playback control capabilities.
- Aides in displaying an image collection with a masonry layout and a lightbox interface for more in-depth viewing.
Unite Gallery:
- Helps in Creating a gallery of photos with a mosaic layout and the ability to display the EXIF data for each image.
- Helps in Displaying a collection of videos with a playlist-style interface that allows users to skip between videos.
- Helps create a gallery of images with a slider layout that displays images in a 3D carousel.
- Helps in Displaying a collection of images in a justified grid with a lightbox interface for viewing the photos in more detail.
Trending Discussions on Widget
Why does changing the background color of the navigation bar in Cupertino App change the height?
"primaryColor" property in "ThemeData" does not work in Flutter
Horizontal listview not scrolling on web but scrolling on mobile
error with PhotoView : Looking up a deactivated widget's ancestor is unsafe
Error: The non-abstract class 'InternalSelectableMathState'
Why am I getting Backend Internal error: "Exception during IR lowering error" when using Jetpack Compose clickable-Modifier?
Flutter Web: Cannot scroll with mouse down (drag) (Flutter 2.5+)
Flutter resizeToAvoidBottomInset true not working with Expanded ListView
Getting android.app.ForegroundServiceStartNotAllowedException in Android 12 (SDK 31)
Move an item from one list to another with animation in Flutter
QUESTION
Why does changing the background color of the navigation bar in Cupertino App change the height?
Asked 2022-Mar-16 at 13:19I have a widget demonstrating the rendering of a Flutter app. As it's written below, the text is visible right underneath the navigationBar. However, if you comment out the backgroundColor, it becomes invisible. Why is that?
1import 'package:flutter/cupertino.dart';
2import 'package:flutter/material.dart';
3
4void main() {
5 runApp(const MyApp());
6}
7
8class MyApp extends StatelessWidget {
9 const MyApp({Key? key}) : super(key: key);
10
11 @override
12 Widget build(BuildContext context) {
13 return CupertinoApp(
14 home: CupertinoPageScaffold(
15 navigationBar: const CupertinoNavigationBar(
16 middle: Text("Settings"),
17 previousPageTitle: "Back",
18 backgroundColor: Colors.blue,
19 ),
20 child: Column(
21 children: const <Widget>[
22 Text("Hello World!"),
23 ],
24 ),
25 ),
26 );
27 }
28}
29
30Without blue color: 
With blue color: 
ANSWER
Answered 2022-Mar-16 at 13:19The height is not changing with the backgroundColor, here's what CupertinoPageScaffold's documentation says:
Content can slide under the navigationBar when they're translucent. In that case, the child's BuildContext's MediaQuery will have a top padding indicating the area of obstructing overlap from the navigationBar.
This is why your text is hidden, it's simply going under the bar when its color is translucent. By using Colors.blue you will have an opaque color.
You can try by using backgroundColor: Colors.transparent the result will be the same as putting no color.
To fix this behavior you can wrap your Column with a SafeArea widget:
1import 'package:flutter/cupertino.dart';
2import 'package:flutter/material.dart';
3
4void main() {
5 runApp(const MyApp());
6}
7
8class MyApp extends StatelessWidget {
9 const MyApp({Key? key}) : super(key: key);
10
11 @override
12 Widget build(BuildContext context) {
13 return CupertinoApp(
14 home: CupertinoPageScaffold(
15 navigationBar: const CupertinoNavigationBar(
16 middle: Text("Settings"),
17 previousPageTitle: "Back",
18 backgroundColor: Colors.blue,
19 ),
20 child: Column(
21 children: const <Widget>[
22 Text("Hello World!"),
23 ],
24 ),
25 ),
26 );
27 }
28}
29
30class MyApp extends StatelessWidget {
31 const MyApp({Key? key}) : super(key: key);
32
33 @override
34 Widget build(BuildContext context) {
35 return CupertinoApp(
36 home: CupertinoPageScaffold(
37 navigationBar: const CupertinoNavigationBar(
38 middle: Text("Settings"),
39 previousPageTitle: "Back",
40 ),
41 child: SafeArea(
42 child: Column(
43 children: const <Widget>[
44 Text("Hello World!"),
45 ],
46 ),
47 ),
48 ),
49 );
50 }
51}
52QUESTION
"primaryColor" property in "ThemeData" does not work in Flutter
Asked 2022-Mar-07 at 09:41I'm currently investigating how to use ThemeData in the Flutter application. It should work with the code below, but the color theme doesn't apply as expected.
Curiously, using the "primarySwatch" option instead of the "primaryColor" option applies the theme as expected.
The execution environment is Chrome on Windows10. Neither has a dark theme applied.
In addition, the results were the same in the Android11 environment of the real machine and the virtual environment.
1import 'package:flutter/material.dart';
2
3void main() {
4 runApp(MyApp());
5}
6
7class MyApp extends StatelessWidget {
8 @override
9 Widget build(BuildContext context) {
10 return MaterialApp(
11 theme: ThemeData(primaryColor: Colors.purple), // This "primaryColor" option does not working.
12 home: Scaffold(
13 appBar: AppBar(
14 title: const Text('Test App'),
15 ),
16 body: Container(),
17 ),
18 );
19 }
20}
21
22Below is my flutter environments.
1import 'package:flutter/material.dart';
2
3void main() {
4 runApp(MyApp());
5}
6
7class MyApp extends StatelessWidget {
8 @override
9 Widget build(BuildContext context) {
10 return MaterialApp(
11 theme: ThemeData(primaryColor: Colors.purple), // This "primaryColor" option does not working.
12 home: Scaffold(
13 appBar: AppBar(
14 title: const Text('Test App'),
15 ),
16 body: Container(),
17 ),
18 );
19 }
20}
21
22Flutter 2.5.1 • channel stable • https://github.com/flutter/flutter.git
23Framework • revision ffb2ecea52 (5 days ago) • 2021-09-17 15:26:33 -0400
24Engine • revision b3af521a05
25Tools • Dart 2.14.2
26What did I make a mistake in the code?
Thanks for your help.
ANSWER
Answered 2021-Sep-23 at 08:04the best way to set the theme to make it sperate file of theme and call in main file and the primary color is working for me theme: ThemeData(), like that you can also set theme of your icon and also you can set theme of your text.
1import 'package:flutter/material.dart';
2
3void main() {
4 runApp(MyApp());
5}
6
7class MyApp extends StatelessWidget {
8 @override
9 Widget build(BuildContext context) {
10 return MaterialApp(
11 theme: ThemeData(primaryColor: Colors.purple), // This "primaryColor" option does not working.
12 home: Scaffold(
13 appBar: AppBar(
14 title: const Text('Test App'),
15 ),
16 body: Container(),
17 ),
18 );
19 }
20}
21
22Flutter 2.5.1 • channel stable • https://github.com/flutter/flutter.git
23Framework • revision ffb2ecea52 (5 days ago) • 2021-09-17 15:26:33 -0400
24Engine • revision b3af521a05
25Tools • Dart 2.14.2
26import 'package:flutter/material.dart';
27 ThemeData appthemedata(BuildContext context)
28 {
29 return ThemeData(
30 primaryColor:appcolor,
31 // scaffoldBackgroundColor: Colors.white,
32 appBarTheme: AppBarTheme(
33 centerTitle: true,
34 elevation: 0,
35 textTheme: TextTheme(headline1: AppBarTextStyle )
36 ),
37 textTheme: TextTheme(
38
39 headline1: TitleTextStyle,
40 bodyText1:Body1TextStyle,
41 ),
42 iconTheme: IconThemeData(
43 color:Colors.white,
44 size: 17,
45 ),
46 );
47 }
48QUESTION
Horizontal listview not scrolling on web but scrolling on mobile
Asked 2022-Mar-02 at 19:02After flutter 2.5 update listview is scrolling only on mobile platforms. It doesn't scroll when I open it on the web. It was working fine in the previous version. I tried the scroll physics but it didn't work. what do you suggest i do? sorry for my bad english.
1
2 return SizedBox(
3 height: 400,
4 child: ListView.builder(
5 physics: ClampingScrollPhysics(),
6 scrollDirection: Axis.horizontal,
7 // ignore: unnecessary_null_comparison
8 itemCount: items == null ? 0 : items.length,
9 itemBuilder: (context, index) {
10 return GestureDetector(
11 onTap: () {
12 LoginForm();
13 },
14 child: Container(
15 margin:
16 EdgeInsets.symmetric(horizontal: 20, vertical: 6),
17 child: SizedBox(
18 width: 400,
19 height: 50,
20 child: Stack(
21 fit: StackFit.expand,
22 children: <Widget>[
23 Container(
24 decoration: BoxDecoration(
25 borderRadius:
26 BorderRadius.all(Radius.circular(20.0)),
27 boxShadow: [
28 BoxShadow(
29 color: fromCssColor(
30 items[index].color.toString()),
31 // color: Colors.black38,
32 offset: Offset(2.0, 2.0),
33 blurRadius: 5.0,
34 spreadRadius: 1.0)
35 ]),
36 ),
37 ClipRRect(
38 borderRadius:
39 BorderRadius.all(Radius.circular(20.0)),
40 child: Image.asset(
41 items[index].image.toString(),
42 fit: BoxFit.cover,
43 ),
44 ),
45 Container(
46 decoration: BoxDecoration(
47 borderRadius:
48 BorderRadius.all(Radius.circular(20.0)),
49 gradient: LinearGradient(
50 begin: Alignment.topCenter,
51 end: Alignment.bottomCenter,
52 colors: [
53 Colors.transparent,
54 Colors.black45
55 ]))
56 ),
57 ],
58 ),
59 ),
60
61ANSWER
Answered 2022-Mar-02 at 19:02
ScrollBehaviorsnow allow or disallow drag scrolling from specifiedPointerDeviceKinds.ScrollBehavior.dragDevices, by default, allows scrolling widgets to be dragged by allPointerDeviceKindsexcept forPointerDeviceKind.mouse.
1
2 return SizedBox(
3 height: 400,
4 child: ListView.builder(
5 physics: ClampingScrollPhysics(),
6 scrollDirection: Axis.horizontal,
7 // ignore: unnecessary_null_comparison
8 itemCount: items == null ? 0 : items.length,
9 itemBuilder: (context, index) {
10 return GestureDetector(
11 onTap: () {
12 LoginForm();
13 },
14 child: Container(
15 margin:
16 EdgeInsets.symmetric(horizontal: 20, vertical: 6),
17 child: SizedBox(
18 width: 400,
19 height: 50,
20 child: Stack(
21 fit: StackFit.expand,
22 children: <Widget>[
23 Container(
24 decoration: BoxDecoration(
25 borderRadius:
26 BorderRadius.all(Radius.circular(20.0)),
27 boxShadow: [
28 BoxShadow(
29 color: fromCssColor(
30 items[index].color.toString()),
31 // color: Colors.black38,
32 offset: Offset(2.0, 2.0),
33 blurRadius: 5.0,
34 spreadRadius: 1.0)
35 ]),
36 ),
37 ClipRRect(
38 borderRadius:
39 BorderRadius.all(Radius.circular(20.0)),
40 child: Image.asset(
41 items[index].image.toString(),
42 fit: BoxFit.cover,
43 ),
44 ),
45 Container(
46 decoration: BoxDecoration(
47 borderRadius:
48 BorderRadius.all(Radius.circular(20.0)),
49 gradient: LinearGradient(
50 begin: Alignment.topCenter,
51 end: Alignment.bottomCenter,
52 colors: [
53 Colors.transparent,
54 Colors.black45
55 ]))
56 ),
57 ],
58 ),
59 ),
60
61import 'package:flutter/material.dart';
62
63// Set ScrollBehavior for an entire application.
64MaterialApp(
65 scrollBehavior: MyCustomScrollBehavior(),
66 // ...
67);
681
2 return SizedBox(
3 height: 400,
4 child: ListView.builder(
5 physics: ClampingScrollPhysics(),
6 scrollDirection: Axis.horizontal,
7 // ignore: unnecessary_null_comparison
8 itemCount: items == null ? 0 : items.length,
9 itemBuilder: (context, index) {
10 return GestureDetector(
11 onTap: () {
12 LoginForm();
13 },
14 child: Container(
15 margin:
16 EdgeInsets.symmetric(horizontal: 20, vertical: 6),
17 child: SizedBox(
18 width: 400,
19 height: 50,
20 child: Stack(
21 fit: StackFit.expand,
22 children: <Widget>[
23 Container(
24 decoration: BoxDecoration(
25 borderRadius:
26 BorderRadius.all(Radius.circular(20.0)),
27 boxShadow: [
28 BoxShadow(
29 color: fromCssColor(
30 items[index].color.toString()),
31 // color: Colors.black38,
32 offset: Offset(2.0, 2.0),
33 blurRadius: 5.0,
34 spreadRadius: 1.0)
35 ]),
36 ),
37 ClipRRect(
38 borderRadius:
39 BorderRadius.all(Radius.circular(20.0)),
40 child: Image.asset(
41 items[index].image.toString(),
42 fit: BoxFit.cover,
43 ),
44 ),
45 Container(
46 decoration: BoxDecoration(
47 borderRadius:
48 BorderRadius.all(Radius.circular(20.0)),
49 gradient: LinearGradient(
50 begin: Alignment.topCenter,
51 end: Alignment.bottomCenter,
52 colors: [
53 Colors.transparent,
54 Colors.black45
55 ]))
56 ),
57 ],
58 ),
59 ),
60
61import 'package:flutter/material.dart';
62
63// Set ScrollBehavior for an entire application.
64MaterialApp(
65 scrollBehavior: MyCustomScrollBehavior(),
66 // ...
67);
68import 'package:flutter/gestures.dart';
69import 'package:flutter/material.dart';
70
71class MyCustomScrollBehavior extends MaterialScrollBehavior {
72 // Override behavior methods and getters like dragDevices
73 @override
74 Set<PointerDeviceKind> get dragDevices => {
75 PointerDeviceKind.touch,
76 PointerDeviceKind.mouse,
77 };
78}
79QUESTION
error with PhotoView : Looking up a deactivated widget's ancestor is unsafe
Asked 2022-Feb-25 at 21:55I have read few stackoverflow posts about "Looking up a deactivated widget's ancestor is unsafe" error but couldn't find an answer which work.
I've tried to set a global key with the scaffold, and to use WidgetsBinding.instance.addPostFrameCallback() without success.
I'm pretty sure I'm doing something stupid and easy to fix, but I can't figure out what.
This is a simple version of the code which replicates the error when you go back from PhotoViewPage (photo_view package) :
my_home_page.dart
1import 'package:flutter/material.dart';
2import 'package:phototest/photo_view_page.dart';
3
4
5class MyHomePage extends StatelessWidget {
6 const MyHomePage({Key? key}) : super(key: key);
7
8 @override
9 Widget build(BuildContext context) {
10 return TextButton(
11 child: const Text("to PhotoView"),
12 onPressed: () => _toPhotoView(context),
13 );
14 }
15
16 void _toPhotoView(BuildContext context) {
17 Navigator.of(context).push(
18 MaterialPageRoute<dynamic>(
19 builder: (BuildContext context) => const PhotoViewPage(),
20 ),
21 );
22 }
23}
24photo_view_page.dart
1import 'package:flutter/material.dart';
2import 'package:phototest/photo_view_page.dart';
3
4
5class MyHomePage extends StatelessWidget {
6 const MyHomePage({Key? key}) : super(key: key);
7
8 @override
9 Widget build(BuildContext context) {
10 return TextButton(
11 child: const Text("to PhotoView"),
12 onPressed: () => _toPhotoView(context),
13 );
14 }
15
16 void _toPhotoView(BuildContext context) {
17 Navigator.of(context).push(
18 MaterialPageRoute<dynamic>(
19 builder: (BuildContext context) => const PhotoViewPage(),
20 ),
21 );
22 }
23}
24import 'package:flutter/material.dart';
25import 'package:photo_view/photo_view.dart';
26
27class PhotoViewPage extends StatelessWidget {
28 const PhotoViewPage({Key? key}) : super(key: key);
29
30 @override
31 Widget build(BuildContext context) {
32 return PhotoView(imageProvider: AssetImage("assets/image.png"));
33 }
34}
35ANSWER
Answered 2021-Dec-18 at 16:14I'm not sure where the error was from, but switching flutter channel from master to stable fixed it.
1import 'package:flutter/material.dart';
2import 'package:phototest/photo_view_page.dart';
3
4
5class MyHomePage extends StatelessWidget {
6 const MyHomePage({Key? key}) : super(key: key);
7
8 @override
9 Widget build(BuildContext context) {
10 return TextButton(
11 child: const Text("to PhotoView"),
12 onPressed: () => _toPhotoView(context),
13 );
14 }
15
16 void _toPhotoView(BuildContext context) {
17 Navigator.of(context).push(
18 MaterialPageRoute<dynamic>(
19 builder: (BuildContext context) => const PhotoViewPage(),
20 ),
21 );
22 }
23}
24import 'package:flutter/material.dart';
25import 'package:photo_view/photo_view.dart';
26
27class PhotoViewPage extends StatelessWidget {
28 const PhotoViewPage({Key? key}) : super(key: key);
29
30 @override
31 Widget build(BuildContext context) {
32 return PhotoView(imageProvider: AssetImage("assets/image.png"));
33 }
34}
35flutter channel stable
36
37flutter upgrade --force
38QUESTION
Error: The non-abstract class 'InternalSelectableMathState'
Asked 2022-Feb-08 at 19:50I just updated flutter version from 2.5.3 to 2.8. I have the following error that i dont know how resolve it. There is no error on any plugin installed, It seems that the error comes from the inner classes themselves and I don't know in which part of my application the error is throwed:
1../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_math_fork-0.3.3+1/lib/src/widgets/selectable.dart:407:7: Error: The non-abstract class 'InternalSelectableMathState' is missing implementations for these members:
2 - TextSelectionDelegate.copySelection
3 - TextSelectionDelegate.cutSelection
4 - TextSelectionDelegate.pasteText
5 - TextSelectionDelegate.selectAll
6Try to either
7 - provide an implementation,
8 - inherit an implementation from a superclass or mixin,
9 - mark the class as abstract, or
10 - provide a 'noSuchMethod' implementation.
11
12class InternalSelectableMathState extends State<InternalSelectableMath>
13 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
14/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:985:8: Context: 'TextSelectionDelegate.copySelection' is defined here.
15 void copySelection(SelectionChangedCause cause);
16 ^^^^^^^^^^^^^
17/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:965:8: Context: 'TextSelectionDelegate.cutSelection' is defined here.
18 void cutSelection(SelectionChangedCause cause);
19 ^^^^^^^^^^^^
20/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:973:16: Context: 'TextSelectionDelegate.pasteText' is defined here.
21 Future<void> pasteText(SelectionChangedCause cause);
22 ^^^^^^^^^
23/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:979:8: Context: 'TextSelectionDelegate.selectAll' is defined here.
24 void selectAll(SelectionChangedCause cause);
25 ^^^^^^^^^
26
27
28FAILURE: Build failed with an exception.
29
30* Where:
31Script 'C:\desarrollo\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1070
32
33* What went wrong:
34Execution failed for task ':app:compileFlutterBuildDebug'.
35> Process 'command 'C:\desarrollo\flutter\bin\flutter.bat'' finished with non-zero exit value 1
36
37* Try:
38Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
39
40* Get more help at https://help.gradle.org
41
42BUILD FAILED in 8m 5s
43Exception: Gradle task assembleDebug failed with exit code 1
44I dont have declared flutter_math_fork on my pubspec.
My flutter doctor output:
1../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_math_fork-0.3.3+1/lib/src/widgets/selectable.dart:407:7: Error: The non-abstract class 'InternalSelectableMathState' is missing implementations for these members:
2 - TextSelectionDelegate.copySelection
3 - TextSelectionDelegate.cutSelection
4 - TextSelectionDelegate.pasteText
5 - TextSelectionDelegate.selectAll
6Try to either
7 - provide an implementation,
8 - inherit an implementation from a superclass or mixin,
9 - mark the class as abstract, or
10 - provide a 'noSuchMethod' implementation.
11
12class InternalSelectableMathState extends State<InternalSelectableMath>
13 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
14/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:985:8: Context: 'TextSelectionDelegate.copySelection' is defined here.
15 void copySelection(SelectionChangedCause cause);
16 ^^^^^^^^^^^^^
17/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:965:8: Context: 'TextSelectionDelegate.cutSelection' is defined here.
18 void cutSelection(SelectionChangedCause cause);
19 ^^^^^^^^^^^^
20/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:973:16: Context: 'TextSelectionDelegate.pasteText' is defined here.
21 Future<void> pasteText(SelectionChangedCause cause);
22 ^^^^^^^^^
23/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:979:8: Context: 'TextSelectionDelegate.selectAll' is defined here.
24 void selectAll(SelectionChangedCause cause);
25 ^^^^^^^^^
26
27
28FAILURE: Build failed with an exception.
29
30* Where:
31Script 'C:\desarrollo\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1070
32
33* What went wrong:
34Execution failed for task ':app:compileFlutterBuildDebug'.
35> Process 'command 'C:\desarrollo\flutter\bin\flutter.bat'' finished with non-zero exit value 1
36
37* Try:
38Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
39
40* Get more help at https://help.gradle.org
41
42BUILD FAILED in 8m 5s
43Exception: Gradle task assembleDebug failed with exit code 1
44Doctor summary (to see all details, run flutter doctor -v):
45[√] Flutter (Channel stable, 2.8.0, on Microsoft Windows [Versión 10.0.19041.1348], locale es-ES)
46[√] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
47[√] Chrome - develop for the web
48[√] Android Studio (version 2020.3)
49[√] VS Code (version 1.62.3)
50[√] Connected device (3 available)
51
52• No issues found!
53I have tried: flutter clean, flutter upgrade and invalidate cache / restart.
Any suggestion is appreciated.
ANSWER
Answered 2021-Dec-13 at 13:09I have solved it by forcing update flutter_math_fork adding to pubspec:
1../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_math_fork-0.3.3+1/lib/src/widgets/selectable.dart:407:7: Error: The non-abstract class 'InternalSelectableMathState' is missing implementations for these members:
2 - TextSelectionDelegate.copySelection
3 - TextSelectionDelegate.cutSelection
4 - TextSelectionDelegate.pasteText
5 - TextSelectionDelegate.selectAll
6Try to either
7 - provide an implementation,
8 - inherit an implementation from a superclass or mixin,
9 - mark the class as abstract, or
10 - provide a 'noSuchMethod' implementation.
11
12class InternalSelectableMathState extends State<InternalSelectableMath>
13 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
14/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:985:8: Context: 'TextSelectionDelegate.copySelection' is defined here.
15 void copySelection(SelectionChangedCause cause);
16 ^^^^^^^^^^^^^
17/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:965:8: Context: 'TextSelectionDelegate.cutSelection' is defined here.
18 void cutSelection(SelectionChangedCause cause);
19 ^^^^^^^^^^^^
20/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:973:16: Context: 'TextSelectionDelegate.pasteText' is defined here.
21 Future<void> pasteText(SelectionChangedCause cause);
22 ^^^^^^^^^
23/C:/desarrollo/flutter/packages/flutter/lib/src/services/text_input.dart:979:8: Context: 'TextSelectionDelegate.selectAll' is defined here.
24 void selectAll(SelectionChangedCause cause);
25 ^^^^^^^^^
26
27
28FAILURE: Build failed with an exception.
29
30* Where:
31Script 'C:\desarrollo\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1070
32
33* What went wrong:
34Execution failed for task ':app:compileFlutterBuildDebug'.
35> Process 'command 'C:\desarrollo\flutter\bin\flutter.bat'' finished with non-zero exit value 1
36
37* Try:
38Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
39
40* Get more help at https://help.gradle.org
41
42BUILD FAILED in 8m 5s
43Exception: Gradle task assembleDebug failed with exit code 1
44Doctor summary (to see all details, run flutter doctor -v):
45[√] Flutter (Channel stable, 2.8.0, on Microsoft Windows [Versión 10.0.19041.1348], locale es-ES)
46[√] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
47[√] Chrome - develop for the web
48[√] Android Studio (version 2020.3)
49[√] VS Code (version 1.62.3)
50[√] Connected device (3 available)
51
52• No issues found!
53flutter_math_fork: ^0.5.0
54I dont know why flutter install flutter_math_fork-0.3.3+1 when i upgrade to 2.8 stable version.
QUESTION
Why am I getting Backend Internal error: "Exception during IR lowering error" when using Jetpack Compose clickable-Modifier?
Asked 2022-Jan-20 at 13:03I am creating a custom Checkbox within a Surface which has a Modifier.clickable:
1 Surface(
2 modifier = Modifier
3 .clickable(
4 enabled = enabled,
5 interactionSource = interactionSource,
6 indication = rememberRipple(),
7 role = Role.Checkbox,
8 onClick = { onCheckedChange(!checked) }
9 )
10 .then(modifier),
11 ) {
12 Row {
13 Checkbox(checked = checked, onCheckedChange = {}, colors = colors)
14 Text(text = text ?: "")
15 }
16 }
17When I try to build that, I get the Exception during IR lowering error error:
1 Surface(
2 modifier = Modifier
3 .clickable(
4 enabled = enabled,
5 interactionSource = interactionSource,
6 indication = rememberRipple(),
7 role = Role.Checkbox,
8 onClick = { onCheckedChange(!checked) }
9 )
10 .then(modifier),
11 ) {
12 Row {
13 Checkbox(checked = checked, onCheckedChange = {}, colors = colors)
14 Text(text = text ?: "")
15 }
16 }
17org.jetbrains.kotlin.backend.common.BackendException: Backend Internal error: Exception during IR lowering
18File being compiled: /home/rene/AndroidStudioProjects/pass13/app/src/main/java/com/aresid/simplepasswordgeneratorapp/ui/widgets/Checkbox.kt
19See the full stacktrace here.
Removing the Modifier.clickable solves the build issue.
I already tried up-/downgrading some versions but nothing is working properly.
Currently, I am using those versions:
1 Surface(
2 modifier = Modifier
3 .clickable(
4 enabled = enabled,
5 interactionSource = interactionSource,
6 indication = rememberRipple(),
7 role = Role.Checkbox,
8 onClick = { onCheckedChange(!checked) }
9 )
10 .then(modifier),
11 ) {
12 Row {
13 Checkbox(checked = checked, onCheckedChange = {}, colors = colors)
14 Text(text = text ?: "")
15 }
16 }
17org.jetbrains.kotlin.backend.common.BackendException: Backend Internal error: Exception during IR lowering
18File being compiled: /home/rene/AndroidStudioProjects/pass13/app/src/main/java/com/aresid/simplepasswordgeneratorapp/ui/widgets/Checkbox.kt
19 ext.versions = [
20 'compileSdk': 31,
21 'targetSdk' : 30,
22 'minSdk' : 26,
23 'kotlin' : '1.5.30',
24 'navigation': '2.3.5',
25 'compose' : '1.0.2'
26 ]
27Has anybody an idea how to fix that?
ANSWER
Answered 2021-Nov-22 at 16:20So I got in touch with the JetBrains team via their issue tracker as @PhilipDukhov suggested and they solved my problem: https://youtrack.jetbrains.com/issue/KT-48815.
I was using kotlinCompilerExtensionVersion = versions.composeVersion in my app's build.gradle file and this is incorrect. versions.composeVersion is something provided by Gradle but it seems to be deprecated. Oneself should manually write the version which they're using there.
QUESTION
Flutter Web: Cannot scroll with mouse down (drag) (Flutter 2.5+)
Asked 2022-Jan-19 at 09:57I can confirm this issue happened in flutter above 2.5. Using 2.2.3 is fine. The question becomes why this feature been removed in 2.5 ? And how to enable it in flutter 2.5?
[Origin Question]I'm using SingleChildScrollView on flutter web with desktop browser. Scrolling only works on mouse wheel but not on mouse click (drag). How can I map mouse click to touch and scroll like mobile?
1import 'package:flutter/material.dart';
2
3void main() {
4 runApp(const MyApp());
5}
6
7class MyApp extends StatelessWidget {
8 const MyApp({Key? key}) : super(key: key);
9 @override
10 Widget build(BuildContext context) {
11 return MaterialApp(
12 title: 'Flutter Demo',
13 theme: ThemeData(
14 primarySwatch: Colors.blue,
15 ),
16 home: SingleChildScrollView(
17 child: Column(
18 children: List<Widget>.generate(50, (i) => Text(i.toString())).toList(),
19 ),
20 ),
21 );
22 }
23}
241import 'package:flutter/material.dart';
2
3void main() {
4 runApp(const MyApp());
5}
6
7class MyApp extends StatelessWidget {
8 const MyApp({Key? key}) : super(key: key);
9 @override
10 Widget build(BuildContext context) {
11 return MaterialApp(
12 title: 'Flutter Demo',
13 theme: ThemeData(
14 primarySwatch: Colors.blue,
15 ),
16 home: SingleChildScrollView(
17 child: Column(
18 children: List<Widget>.generate(50, (i) => Text(i.toString())).toList(),
19 ),
20 ),
21 );
22 }
23}
24flutter doctor -v
25[✓] Flutter (Channel master, 2.6.0-6.0.pre.6, on Ubuntu 20.04.3 LTS 5.11.0-34-generic, locale en_US.UTF-8)
26 • Flutter version 2.6.0-6.0.pre.6 at /home/XXX
27 • Upstream repository https://github.com/flutter/flutter.git
28 • Framework revision 0c5431d99c (12 days ago), 2021-09-05 22:31:02 -0400
29 • Engine revision b9c633900e
30 • Dart version 2.15.0 (build 2.15.0-82.0.dev)
31
32[✓] Chrome - develop for the web
33 • Chrome at google-chrome
34
35[✓] Connected device (2 available)
36 • Linux (desktop) • linux • linux-x64 • Ubuntu 20.04.3 LTS 5.11.0-34-generic
37 • Chrome (web) • chrome • web-javascript • Google Chrome 93.0.4577.82
38ANSWER
Answered 2021-Sep-18 at 12:19Flutter change mouse scroll behavior after 2.5. See this for detail.
1import 'package:flutter/material.dart';
2
3void main() {
4 runApp(const MyApp());
5}
6
7class MyApp extends StatelessWidget {
8 const MyApp({Key? key}) : super(key: key);
9 @override
10 Widget build(BuildContext context) {
11 return MaterialApp(
12 title: 'Flutter Demo',
13 theme: ThemeData(
14 primarySwatch: Colors.blue,
15 ),
16 home: SingleChildScrollView(
17 child: Column(
18 children: List<Widget>.generate(50, (i) => Text(i.toString())).toList(),
19 ),
20 ),
21 );
22 }
23}
24flutter doctor -v
25[✓] Flutter (Channel master, 2.6.0-6.0.pre.6, on Ubuntu 20.04.3 LTS 5.11.0-34-generic, locale en_US.UTF-8)
26 • Flutter version 2.6.0-6.0.pre.6 at /home/XXX
27 • Upstream repository https://github.com/flutter/flutter.git
28 • Framework revision 0c5431d99c (12 days ago), 2021-09-05 22:31:02 -0400
29 • Engine revision b9c633900e
30 • Dart version 2.15.0 (build 2.15.0-82.0.dev)
31
32[✓] Chrome - develop for the web
33 • Chrome at google-chrome
34
35[✓] Connected device (2 available)
36 • Linux (desktop) • linux • linux-x64 • Ubuntu 20.04.3 LTS 5.11.0-34-generic
37 • Chrome (web) • chrome • web-javascript • Google Chrome 93.0.4577.82
38class MyCustomScrollBehavior extends MaterialScrollBehavior {
39 // Override behavior methods and getters like dragDevices
40 @override
41 Set<PointerDeviceKind> get dragDevices => {
42 PointerDeviceKind.touch,
43 PointerDeviceKind.mouse,
44 // etc.
45 };
46}
47
48// ScrollBehavior can be set for a specific widget.
49final ScrollController controller = ScrollController();
50ScrollConfiguration(
51 behavior: MyCustomScrollBehavior(),
52 child: ListView.builder(
53 controller: controller,
54 itemBuilder: (BuildContext context, int index) {
55 return Text('Item $index');
56 }
57 ),
58);
59QUESTION
Flutter resizeToAvoidBottomInset true not working with Expanded ListView
Asked 2022-Jan-10 at 08:46The keyboard hides my ListView (GroupedListView). I think it's because of the Expanded Widget.
My body:
1Column(
2 children: [
3 Expanded(
4 child: Padding(
5 padding: const EdgeInsets.all(8.0),
6 child: GroupedListView<dynamic, String>(
7 controller: _scrollController,
8 keyboardDismissBehavior:
9 ScrollViewKeyboardDismissBehavior.onDrag,
10 physics: const BouncingScrollPhysics(
11 parent: AlwaysScrollableScrollPhysics()),
12 itemBuilder: (context, message) {
13 return ListTile(
14 title: ChatBubble(message),
15 );
16 },
17 elements: messages,
18 groupBy: (message) => DateFormat('MMMM dd,yyyy')
19 .format(message.timestamp.toDate()),
20 groupSeparatorBuilder: (String groupByValue) =>
21 getMiddleChatBubble(context, groupByValue),
22 itemComparator: (item1, item2) =>
23 item1.timestamp.compareTo(item2.timestamp),
24 useStickyGroupSeparators: false,
25 floatingHeader: false,
26 order: GroupedListOrder.ASC,
27 ),
28 ),
29 ),
30 WriteMessageBox(
31 group: group,
32 groupId: docs[0].id,
33 tokens: [widget.friendToken])
34 ],
35 );
36
ANSWER
Answered 2022-Jan-04 at 11:41It appears that you are using text fields so it hides data or sometimes it may overflow borders by black and yellow stripes
better to use SingleChildScrollView and for scrolling direction use scrollDirection with parameters Axis.vertical or Axis.horizontal
1Column(
2 children: [
3 Expanded(
4 child: Padding(
5 padding: const EdgeInsets.all(8.0),
6 child: GroupedListView<dynamic, String>(
7 controller: _scrollController,
8 keyboardDismissBehavior:
9 ScrollViewKeyboardDismissBehavior.onDrag,
10 physics: const BouncingScrollPhysics(
11 parent: AlwaysScrollableScrollPhysics()),
12 itemBuilder: (context, message) {
13 return ListTile(
14 title: ChatBubble(message),
15 );
16 },
17 elements: messages,
18 groupBy: (message) => DateFormat('MMMM dd,yyyy')
19 .format(message.timestamp.toDate()),
20 groupSeparatorBuilder: (String groupByValue) =>
21 getMiddleChatBubble(context, groupByValue),
22 itemComparator: (item1, item2) =>
23 item1.timestamp.compareTo(item2.timestamp),
24 useStickyGroupSeparators: false,
25 floatingHeader: false,
26 order: GroupedListOrder.ASC,
27 ),
28 ),
29 ),
30 WriteMessageBox(
31 group: group,
32 groupId: docs[0].id,
33 tokens: [widget.friendToken])
34 ],
35 );
36return SingleChildScrollView(
37 scrollDirection: Axis.vertical,
38 child :Column(
39 children: [
40 Expanded(
41 child: Padding(
42 padding: const EdgeInsets.all(8.0),
43 child: GroupedListView<dynamic, String>(
44 controller: _scrollController,
45 keyboardDismissBehavior:
46 ScrollViewKeyboardDismissBehavior.onDrag,
47 physics: const BouncingScrollPhysics(
48 parent: AlwaysScrollableScrollPhysics()),
49 itemBuilder: (context, message) {
50 return ListTile(
51 title: ChatBubble(message),
52 );
53 },
54 elements: messages,
55 groupBy: (message) => DateFormat('MMMM dd,yyyy')
56 .format(message.timestamp.toDate()),
57 groupSeparatorBuilder: (String groupByValue) =>
58 getMiddleChatBubble(context, groupByValue),
59 itemComparator: (item1, item2) =>
60 item1.timestamp.compareTo(item2.timestamp),
61 useStickyGroupSeparators: false,
62 floatingHeader: false,
63 order: GroupedListOrder.ASC,
64 ),
65 ),
66 ),
67 WriteMessageBox(
68 group: group,
69 groupId: docs[0].id,
70 tokens: [widget.friendToken])
71 ],
72 );
73
74
75);
76QUESTION
Getting android.app.ForegroundServiceStartNotAllowedException in Android 12 (SDK 31)
Asked 2021-Dec-17 at 11:23I upgraded my apps targetSdkVersion and compileSdkVersion to SDK 31, and started receiving the following crash in app in a service that updates widget in background.
1java.lang.RuntimeException:
2 at android.app.ActivityThread.handleReceiver (ActivityThread.java:4321)
3 at android.app.ActivityThread.access$1600 (ActivityThread.java:247)
4 at android.app.ActivityThread$H.handleMessage (ActivityThread.java:2068)
5 at android.os.Handler.dispatchMessage (Handler.java:106)
6 at android.os.Looper.loopOnce (Looper.java:201)
7 at android.os.Looper.loop (Looper.java:288)
8 at android.app.ActivityThread.main (ActivityThread.java:7842)
9 at java.lang.reflect.Method.invoke (Native Method)
10 at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:548)
11 at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1003)
12Caused by: android.app.ForegroundServiceStartNotAllowedException:
13 at android.app.ForegroundServiceStartNotAllowedException$1.createFromParcel (ForegroundServiceStartNotAllowedException.java:54)
14 at android.app.ForegroundServiceStartNotAllowedException$1.createFromParcel (ForegroundServiceStartNotAllowedException.java:50)
15 at android.os.Parcel.readParcelable (Parcel.java:3333)
16 at android.os.Parcel.createExceptionOrNull (Parcel.java:2420)
17 at android.os.Parcel.createException (Parcel.java:2409)
18 at android.os.Parcel.readException (Parcel.java:2392)
19 at android.os.Parcel.readException (Parcel.java:2334)
20 at android.app.IActivityManager$Stub$Proxy.startService (IActivityManager.java:5971)
21 at android.app.ContextImpl.startServiceCommon (ContextImpl.java:1847)
22 at android.app.ContextImpl.startForegroundService (ContextImpl.java:1823)
23 at android.content.ContextWrapper.startForegroundService (ContextWrapper.java:779)
24 at android.content.ContextWrapper.startForegroundService (ContextWrapper.java:779)
25 at com.mypackage.appname.ui.widget.widget_package.WidgetClassName.onUpdate (WidgetClassName.java:48)
26 at android.appwidget.AppWidgetProvider.onReceive (AppWidgetProvider.java:66)
27 at com.mypackage.appname.ui.widget.widget_package.WidgetClassName.onReceive (WidgetClassName.java)
28 at android.app.ActivityThread.handleReceiver (ActivityThread.java:4312)
29 at android.app.ActivityThread.access$1600 (ActivityThread.java:247)
30 at android.app.ActivityThread$H.handleMessage (ActivityThread.java:2068)
31 at android.os.Handler.dispatchMessage (Handler.java:106)
32 at android.os.Looper.loopOnce (Looper.java:201)
33 at android.os.Looper.loop (Looper.java:288)
34 at android.app.ActivityThread.main (ActivityThread.java:7842)
35 at java.lang.reflect.Method.invoke (Native Method)
36 at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:548)
37 at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1003)
38Caused by: android.os.RemoteException:
39 at com.android.server.am.ActiveServices.startServiceLocked (ActiveServices.java:691)
40 at com.android.server.am.ActiveServices.startServiceLocked (ActiveServices.java:616)
41 at com.android.server.am.ActivityManagerService.startService (ActivityManagerService.java:11839)
42 at android.app.IActivityManager$Stub.onTransact (IActivityManager.java:2519)
43 at com.android.server.am.ActivityManagerService.onTransact (ActivityManagerService.java:2498)
44Also, if you're using something like Firebase Crashlytics, your stacktrace must be something like this ->
1java.lang.RuntimeException:
2 at android.app.ActivityThread.handleReceiver (ActivityThread.java:4321)
3 at android.app.ActivityThread.access$1600 (ActivityThread.java:247)
4 at android.app.ActivityThread$H.handleMessage (ActivityThread.java:2068)
5 at android.os.Handler.dispatchMessage (Handler.java:106)
6 at android.os.Looper.loopOnce (Looper.java:201)
7 at android.os.Looper.loop (Looper.java:288)
8 at android.app.ActivityThread.main (ActivityThread.java:7842)
9 at java.lang.reflect.Method.invoke (Native Method)
10 at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:548)
11 at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1003)
12Caused by: android.app.ForegroundServiceStartNotAllowedException:
13 at android.app.ForegroundServiceStartNotAllowedException$1.createFromParcel (ForegroundServiceStartNotAllowedException.java:54)
14 at android.app.ForegroundServiceStartNotAllowedException$1.createFromParcel (ForegroundServiceStartNotAllowedException.java:50)
15 at android.os.Parcel.readParcelable (Parcel.java:3333)
16 at android.os.Parcel.createExceptionOrNull (Parcel.java:2420)
17 at android.os.Parcel.createException (Parcel.java:2409)
18 at android.os.Parcel.readException (Parcel.java:2392)
19 at android.os.Parcel.readException (Parcel.java:2334)
20 at android.app.IActivityManager$Stub$Proxy.startService (IActivityManager.java:5971)
21 at android.app.ContextImpl.startServiceCommon (ContextImpl.java:1847)
22 at android.app.ContextImpl.startForegroundService (ContextImpl.java:1823)
23 at android.content.ContextWrapper.startForegroundService (ContextWrapper.java:779)
24 at android.content.ContextWrapper.startForegroundService (ContextWrapper.java:779)
25 at com.mypackage.appname.ui.widget.widget_package.WidgetClassName.onUpdate (WidgetClassName.java:48)
26 at android.appwidget.AppWidgetProvider.onReceive (AppWidgetProvider.java:66)
27 at com.mypackage.appname.ui.widget.widget_package.WidgetClassName.onReceive (WidgetClassName.java)
28 at android.app.ActivityThread.handleReceiver (ActivityThread.java:4312)
29 at android.app.ActivityThread.access$1600 (ActivityThread.java:247)
30 at android.app.ActivityThread$H.handleMessage (ActivityThread.java:2068)
31 at android.os.Handler.dispatchMessage (Handler.java:106)
32 at android.os.Looper.loopOnce (Looper.java:201)
33 at android.os.Looper.loop (Looper.java:288)
34 at android.app.ActivityThread.main (ActivityThread.java:7842)
35 at java.lang.reflect.Method.invoke (Native Method)
36 at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:548)
37 at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1003)
38Caused by: android.os.RemoteException:
39 at com.android.server.am.ActiveServices.startServiceLocked (ActiveServices.java:691)
40 at com.android.server.am.ActiveServices.startServiceLocked (ActiveServices.java:616)
41 at com.android.server.am.ActivityManagerService.startService (ActivityManagerService.java:11839)
42 at android.app.IActivityManager$Stub.onTransact (IActivityManager.java:2519)
43 at com.android.server.am.ActivityManagerService.onTransact (ActivityManagerService.java:2498)
44Caused by android.app.ForegroundServiceStartNotAllowedException: startForegroundService() not allowed due to mAllowStartForeground false: service com.mypackage.appname/.ui.widget.widget_package.MyForegroundServiceName
45 at android.app.ForegroundServiceStartNotAllowedException$1.createFromParcel(ForegroundServiceStartNotAllowedException.java:54)
46 at android.app.ForegroundServiceStartNotAllowedException$1.createFromParcel(ForegroundServiceStartNotAllowedException.java:50)
47 at android.os.Parcel.readParcelable(Parcel.java:3333)
48 at android.os.Parcel.createExceptionOrNull(Parcel.java:2420)
49 at android.os.Parcel.createException(Parcel.java:2409)
50 at android.os.Parcel.readException(Parcel.java:2392)
51 at android.os.Parcel.readException(Parcel.java:2334)
52 at android.app.IActivityManager$Stub$Proxy.startService(IActivityManager.java:5971)
53 at android.app.ContextImpl.startServiceCommon(ContextImpl.java:1847)
54 at android.app.ContextImpl.startForegroundService(ContextImpl.java:1823)
55 at android.content.ContextWrapper.startForegroundService(ContextWrapper.java:779)
56 at android.content.ContextWrapper.startForegroundService(ContextWrapper.java:779)
57 at com.mypackage.appname.ui.widget.widget_package.WidgetClassName.onUpdate(WidgetClassName.java:48)
58 at android.appwidget.AppWidgetProvider.onReceive(AppWidgetProvider.java:66)
59 at com.mypackage.appname.ui.widget.widget_package.WidgetClassName.onReceive(WidgetClassName.java)
60 at android.app.ActivityThread.handleReceiver(ActivityThread.java:4312)
61 at android.app.ActivityThread.access$1600(ActivityThread.java:247)
62 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2068)
63 at android.os.Handler.dispatchMessage(Handler.java:106)
64 at android.os.Looper.loopOnce(Looper.java:201)
65 at android.os.Looper.loop(Looper.java:288)
66 at android.app.ActivityThread.main(ActivityThread.java:7842)
67 at java.lang.reflect.Method.invoke(Method.java)
68 at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
69 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
70I'm adding the way to reproduce this issue, and fixes to this problem, because I did not find any documentation about this on StackOverflow when I searched for it.
ANSWER
Answered 2021-Oct-17 at 13:49Step 1. Update your targetSdkVersion and compileSdkVersion to SDK 31.
Step 2. Try to run any Foreground service when your app is in background. In my case, it was the widget's onUpdate method being called after updatePeriodMillis time, which will start a Foreground service, which updates the data by fetching appropriate information from internet.
Remember: The background execution limits added in Android 8.0 have nothing to do with this problem. This limitation/exception was added in Android 12/SDK 31 - Source.
What is this exception, and why was it added?
Apps that target Android 12 (API level 31) or higher can't start foreground services while running in the background, except for a few special cases. If an app tries to start a foreground service while the app is running in the background, and the foreground service doesn't satisfy one of the exceptional cases, the system throws a ForegroundServiceStartNotAllowedException.
These special cases are:
Your app transitions from a user-visible state, such as an activity.
Your app can start an activity from the background, except for the case where the app has an activity in the back stack of an existing task.
Your app receives a high-priority message using Firebase Cloud Messaging.
The user performs an action on a UI element related to your app. For example, they might interact with a bubble, notification, widget, or activity.
Your app invokes an exact alarm to complete an action that the user requests.
Your app is the device's current input method.
Your app receives an event that's related to geofencing or activity recognition transition.
After the device reboots and receives the ACTION_BOOT_COMPLETED, ACTION_LOCKED_BOOT_COMPLETED, or ACTION_MY_PACKAGE_REPLACED intent action in a broadcast receiver.
Your app receives the ACTION_TIMEZONE_CHANGED, ACTION_TIME_CHANGED, or ACTION_LOCALE_CHANGED intent action in a broadcast receiver.
Your app receives a Bluetooth broadcast that requires the BLUETOOTH_CONNECT or BLUETOOTH_SCAN permissions.
Apps with certain system roles or permission, such as device owners and profile owners.
Your app uses the Companion Device Manager and declares the REQUEST_COMPANION_START_FOREGROUND_SERVICES_FROM_BACKGROUND permission or the REQUEST_COMPANION_RUN_IN_BACKGROUND permission. Whenever possible, use REQUEST_COMPANION_START_FOREGROUND_SERVICES_FROM_BACKGROUND.
The user turns off battery optimizations for your app. You can help users find this option by sending them to your app's App info page in system settings. To do so, invoke an intent that contains the ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS intent action.
Possible solutions Solution 1
This will work for a while in Play Store until Google makes it mandatory to upgrade to API level 31.
Currently, starting November 2021 all apps must target API Level 30 and above. So if you're using API Level 31 for your app, downgrading your compileSdkVersion & targetSdkVersion to API Level 30 should fix the issue (atleast for a while).
If you were using Foreground service to do work that is time sensitive, start Foreground services within an exact alarm. Check out more about this from documentation here -> Set an exact alarm.
For time-insensitive/expedited workThis is the solution that I ended up using for my app. Use WorkManager to schedule and start the background work. Check out more about this from documentation here -> Schedule expedited work.
You can know more about WorkManager here -> WorkManager
Github Repo for WorkManager samples -> WorkManager Samples
I added this answer specifically because searching for this exception does not bring up any resources to know why the service behaves differently on Android 12. All this is present in Google's documentation, and always remember to check the behaviour changes from the doc.
Everything related to this change can be found here -> Android 12 Behavior Changes, specifically within the Foreground Service launch restrictions.
QUESTION
Move an item from one list to another with animation in Flutter
Asked 2021-Oct-06 at 17:48I have two vertical lists, one on the left side and the other one on the right, let's call them "Selected List" and "Unselected List". I want the items in Unselected List to Animate from left side to the right side of the screen and add to Selected List. the other items should fill the empty space in Unselected List and items in Selected List should free up the space for new item. Here's the Ui
My Code:
1class AddToFave extends StatefulWidget {
2 const AddToFave({Key? key}) : super(key: key);
3
4 @override
5 _AddToFaveState createState() => _AddToFaveState();
6}
7
8class _AddToFaveState extends State<AddToFave> {
9 List<String> unselected = [ '1','2','3','4','5','6','7','8','9','10'];
10 List<String> selected = [];
11 @override
12 Widget build(BuildContext context) {
13 return Scaffold(
14 body: SafeArea(
15 child: Row(
16 mainAxisAlignment: MainAxisAlignment.spaceBetween,
17 children: [
18 Container(
19 width: MediaQuery.of(context).size.width / 5,
20 height: MediaQuery.of(context).size.height,
21 child: ListView.builder(
22 itemCount: selected.length,
23 itemBuilder: (context, index) {
24 return InkWell(
25 onTap: () {
26 unselected.add(selected[index]);
27 selected.removeAt(index);
28 setState(() {});
29 },
30 child: Container(
31 width: MediaQuery.of(context).size.width / 5,
32 height: MediaQuery.of(context).size.width / 5,
33 decoration: BoxDecoration(
34 color: Colors.black,
35 borderRadius: BorderRadius.circular(
36 MediaQuery.of(context).size.width / 5)),
37 child: Center(
38 child: Text(
39 selected[index],
40 style: TextStyle(color: Colors.white),
41 )),
42 ),
43 );
44 }),
45 ),
46 Container(
47 width: MediaQuery.of(context).size.width / 5,
48 height: MediaQuery.of(context).size.height,
49 child: ListView.builder(
50 itemCount: unselected.length,
51 itemBuilder: (context, index) {
52 return InkWell(
53 onTap: () {
54 selected.add(unselected[index]);
55 unselected.removeAt(index);
56 setState(() {});
57 },
58 child: Container(
59 width: MediaQuery.of(context).size.width / 5,
60 height: MediaQuery.of(context).size.width / 5,
61 decoration: BoxDecoration(
62 color: Colors.black,
63 borderRadius: BorderRadius.circular(
64 MediaQuery.of(context).size.width / 5)),
65 child: Center(
66 child: Text(
67 unselected[index],
68 style: TextStyle(color: Colors.white),
69 )),
70 ),
71 );
72 }),
73 ),
74 ],
75 ),
76 ),
77 );
78 }
79}
80Thank you in advance.
ANSWER
Answered 2021-Oct-06 at 17:48This task can be broken into 2 parts.
First, use an AnimatedList instead of a regular ListView, so that when an item is removed, you can control its "exit animation" and shrink its size, thus making other items slowly move upwards to fill in its spot.
Secondly, while the item is being removed from the first list, make an OverlayEntry and animate its position, to create an illusion of the item flying. Once the flying is finished, we can remove the overlay and insert the item in the actual destination list.
Full source code for you to use, as a starting point:
1class AddToFave extends StatefulWidget {
2 const AddToFave({Key? key}) : super(key: key);
3
4 @override
5 _AddToFaveState createState() => _AddToFaveState();
6}
7
8class _AddToFaveState extends State<AddToFave> {
9 List<String> unselected = [ '1','2','3','4','5','6','7','8','9','10'];
10 List<String> selected = [];
11 @override
12 Widget build(BuildContext context) {
13 return Scaffold(
14 body: SafeArea(
15 child: Row(
16 mainAxisAlignment: MainAxisAlignment.spaceBetween,
17 children: [
18 Container(
19 width: MediaQuery.of(context).size.width / 5,
20 height: MediaQuery.of(context).size.height,
21 child: ListView.builder(
22 itemCount: selected.length,
23 itemBuilder: (context, index) {
24 return InkWell(
25 onTap: () {
26 unselected.add(selected[index]);
27 selected.removeAt(index);
28 setState(() {});
29 },
30 child: Container(
31 width: MediaQuery.of(context).size.width / 5,
32 height: MediaQuery.of(context).size.width / 5,
33 decoration: BoxDecoration(
34 color: Colors.black,
35 borderRadius: BorderRadius.circular(
36 MediaQuery.of(context).size.width / 5)),
37 child: Center(
38 child: Text(
39 selected[index],
40 style: TextStyle(color: Colors.white),
41 )),
42 ),
43 );
44 }),
45 ),
46 Container(
47 width: MediaQuery.of(context).size.width / 5,
48 height: MediaQuery.of(context).size.height,
49 child: ListView.builder(
50 itemCount: unselected.length,
51 itemBuilder: (context, index) {
52 return InkWell(
53 onTap: () {
54 selected.add(unselected[index]);
55 unselected.removeAt(index);
56 setState(() {});
57 },
58 child: Container(
59 width: MediaQuery.of(context).size.width / 5,
60 height: MediaQuery.of(context).size.width / 5,
61 decoration: BoxDecoration(
62 color: Colors.black,
63 borderRadius: BorderRadius.circular(
64 MediaQuery.of(context).size.width / 5)),
65 child: Center(
66 child: Text(
67 unselected[index],
68 style: TextStyle(color: Colors.white),
69 )),
70 ),
71 );
72 }),
73 ),
74 ],
75 ),
76 ),
77 );
78 }
79}
80import 'package:flutter/material.dart';
81
82void main() {
83 runApp(MyApp());
84}
85
86class MyApp extends StatelessWidget {
87 @override
88 Widget build(BuildContext context) {
89 return MaterialApp(
90 home: TwoAnimatedListDemo(),
91 );
92 }
93}
94
95class TwoAnimatedListDemo extends StatefulWidget {
96 const TwoAnimatedListDemo({Key? key}) : super(key: key);
97
98 @override
99 _TwoAnimatedListDemoState createState() => _TwoAnimatedListDemoState();
100}
101
102class _TwoAnimatedListDemoState extends State<TwoAnimatedListDemo> {
103 final List<String> _unselected = ['A', 'B', 'C', 'D', 'E', 'F', 'G'];
104 final List<String> _selected = [];
105
106 final _unselectedListKey = GlobalKey<AnimatedListState>();
107 final _selectedListKey = GlobalKey<AnimatedListState>();
108
109 @override
110 Widget build(BuildContext context) {
111 return Scaffold(
112 appBar: AppBar(
113 title: Text('Two Animated List Demo'),
114 ),
115 body: Row(
116 children: [
117 SizedBox(
118 width: 56,
119 child: AnimatedList(
120 key: _unselectedListKey,
121 initialItemCount: _unselected.length,
122 itemBuilder: (context, index, animation) {
123 return InkWell(
124 onTap: () => _moveItem(
125 fromIndex: index,
126 fromList: _unselected,
127 fromKey: _unselectedListKey,
128 toList: _selected,
129 toKey: _selectedListKey,
130 ),
131 child: Item(text: _unselected[index]),
132 );
133 },
134 ),
135 ),
136 Spacer(),
137 SizedBox(
138 width: 56,
139 child: AnimatedList(
140 key: _selectedListKey,
141 initialItemCount: _selected.length,
142 itemBuilder: (context, index, animation) {
143 return InkWell(
144 onTap: () => _moveItem(
145 fromIndex: index,
146 fromList: _selected,
147 fromKey: _selectedListKey,
148 toList: _unselected,
149 toKey: _unselectedListKey,
150 ),
151 child: Item(text: _selected[index]),
152 );
153 },
154 ),
155 ),
156 ],
157 ),
158 );
159 }
160
161 int _flyingCount = 0;
162
163 _moveItem({
164 required int fromIndex,
165 required List fromList,
166 required GlobalKey<AnimatedListState> fromKey,
167 required List toList,
168 required GlobalKey<AnimatedListState> toKey,
169 Duration duration = const Duration(milliseconds: 300),
170 }) {
171 final globalKey = GlobalKey();
172 final item = fromList.removeAt(fromIndex);
173 fromKey.currentState!.removeItem(
174 fromIndex,
175 (context, animation) {
176 return SizeTransition(
177 sizeFactor: animation,
178 child: Opacity(
179 key: globalKey,
180 opacity: 0.0,
181 child: Item(text: item),
182 ),
183 );
184 },
185 duration: duration,
186 );
187 _flyingCount++;
188
189 WidgetsBinding.instance!.addPostFrameCallback((timeStamp) async {
190 // Find the starting position of the moving item, which is exactly the
191 // gap its leaving behind, in the original list.
192 final box1 = globalKey.currentContext!.findRenderObject() as RenderBox;
193 final pos1 = box1.localToGlobal(Offset.zero);
194 // Find the destination position of the moving item, which is at the
195 // end of the destination list.
196 final box2 = toKey.currentContext!.findRenderObject() as RenderBox;
197 final box2height = box1.size.height * (toList.length + _flyingCount - 1);
198 final pos2 = box2.localToGlobal(Offset(0, box2height));
199 // Insert an overlay to "fly over" the item between two lists.
200 final entry = OverlayEntry(builder: (BuildContext context) {
201 return TweenAnimationBuilder(
202 tween: Tween<Offset>(begin: pos1, end: pos2),
203 duration: duration,
204 builder: (_, Offset value, child) {
205 return Positioned(
206 left: value.dx,
207 top: value.dy,
208 child: Item(text: item),
209 );
210 },
211 );
212 });
213
214 Overlay.of(context)!.insert(entry);
215 await Future.delayed(duration);
216 entry.remove();
217 toList.add(item);
218 toKey.currentState!.insertItem(toList.length - 1);
219 _flyingCount--;
220 });
221 }
222}
223
224class Item extends StatelessWidget {
225 final String text;
226
227 const Item({Key? key, required this.text}) : super(key: key);
228
229 @override
230 Widget build(BuildContext context) {
231 return Padding(
232 padding: const EdgeInsets.all(4.0),
233 child: CircleAvatar(
234 child: Text(text),
235 radius: 24,
236 ),
237 );
238 }
239}
240Community Discussions contain sources that include Stack Exchange Network
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