I have created a a flutter project and installed those packages
environment:
sdk: ">=3.0.5 <4.0.0"
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^1.0.2
google_fonts: ^5.1.0
get: ^4.6.5
phlox_animations: ^2.1.1
shared_preferences: ^2.1.2
http: ^1.1.0
google_nav_bar: ^5.0.6
carousel_slider: ^4.2.1
intl:
syncfusion_flutter_datepicker: ^23.1.38
syncfusion_flutter_calendar: ^23.1.42
flutter_slidable: ^3.0.0
image_picker: ^1.0.4
flutter_html: ^2.2.1
dev_dependencies:
flutter_test:
sdk: flutter
flutter_lints: ^2.0.0
device_preview: ^1.1.0
after installing
flutter_html: ^2.2.1
project doeas not start
So after do some research I found that happens because I have to update minimum sdk version to 21
so I have updated app level build grade file like this
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "XXXXXXX"
// You can update the following values to match your application needs.
// For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
minSdkVersion 21
targetSdkVersion flutter.targetSdkVersion
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
}
after did this change project run succesfully.
BUT
when I try to use flutter_html package to view html string in my flutter app this gives me error. this happens even I import the package.
import statement I used
import 'package:flutter_html/flutter_html.dart';
ERROR message in console
Launching lib\main.dart on sdk gphone x86 in debug mode...
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_math_fork-0.5.0/lib/src/widgets/selection/gesture_detector_builder.dart:186:20: Error: The argument type 'void Function(TapDownDetails)' can't be assigned to the parameter type 'void Function(TapDragDownDetails)?'.
- 'TapDownDetails' is from 'package:flutter/src/gestures/tap.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/gestures/tap.dart').
- 'TapDragDownDetails' is from 'package:flutter/src/widgets/tap_and_drag_gestures.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/widgets/tap_and_drag_gestures.dart').
onTapDown: onTapDown,
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_math_fork-0.5.0/lib/src/widgets/selection/gesture_detector_builder.dart:190:24: Error: The argument type 'void Function(TapUpDetails)' can't be assigned to the parameter type 'void Function(TapDragUpDetails)?'.
- 'TapUpDetails' is from 'package:flutter/src/gestures/tap.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/gestures/tap.dart').
- 'TapDragUpDetails' is from 'package:flutter/src/widgets/tap_and_drag_gestures.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/widgets/tap_and_drag_gestures.dart').
onSingleTapUp: onSingleTapUp,
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_math_fork-0.5.0/lib/src/widgets/selection/gesture_detector_builder.dart:195:26: Error: The argument type 'void Function(TapDownDetails)' can't be assigned to the parameter type 'void Function(TapDragDownDetails)?'.
- 'TapDownDetails' is from 'package:flutter/src/gestures/tap.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/gestures/tap.dart').
- 'TapDragDownDetails' is from 'package:flutter/src/widgets/tap_and_drag_gestures.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/widgets/tap_and_drag_gestures.dart').
onDoubleTapDown: onDoubleTapDown,
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_math_fork-0.5.0/lib/src/widgets/selection/gesture_detector_builder.dart:196:31: Error: The argument type 'void Function(DragStartDetails)' can't be assigned to the parameter type 'void Function(TapDragStartDetails)?'.
- 'DragStartDetails' is from 'package:flutter/src/gestures/drag_details.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/gestures/drag_details.dart').
- 'TapDragStartDetails' is from 'package:flutter/src/widgets/tap_and_drag_gestures.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/widgets/tap_and_drag_gestures.dart').
onDragSelectionStart: onDragSelectionStart,
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_math_fork-0.5.0/lib/src/widgets/selection/gesture_detector_builder.dart:197:32: Error: The argument type 'void Function(DragStartDetails, DragUpdateDetails)' can't be assigned to the parameter type 'void Function(TapDragUpdateDetails)?'.
- 'DragStartDetails' is from 'package:flutter/src/gestures/drag_details.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/gestures/drag_details.dart').
- 'DragUpdateDetails' is from 'package:flutter/src/gestures/drag_details.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/gestures/drag_details.dart').
- 'TapDragUpdateDetails' is from 'package:flutter/src/widgets/tap_and_drag_gestures.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/widgets/tap_and_drag_gestures.dart').
onDragSelectionUpdate: onDragSelectionUpdate,
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_math_fork-0.5.0/lib/src/widgets/selection/gesture_detector_builder.dart:198:29: Error: The argument type 'void Function(DragEndDetails)' can't be assigned to the parameter type 'void Function(TapDragEndDetails)?'.
- 'DragEndDetails' is from 'package:flutter/src/gestures/drag_details.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/gestures/drag_details.dart').
- 'TapDragEndDetails' is from 'package:flutter/src/widgets/tap_and_drag_gestures.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/widgets/tap_and_drag_gestures.dart').
onDragSelectionEnd: onDragSelectionEnd,
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_layout_grid-1.0.6/lib/src/widgets/placement.dart:82:55: Error: A value of type 'RenderObject?' can't be assigned to a variable of type 'AbstractNode?'.
- 'RenderObject' is from 'package:flutter/src/rendering/object.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/rendering/object.dart').
- 'AbstractNode' is from 'package:flutter/src/foundation/node.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/foundation/node.dart').
final AbstractNode? targetParent = renderObject.parent;
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_layout_grid-1.0.6/lib/src/widgets/placement.dart:83:58: Error: The method 'markNeedsPlacement' isn't defined for the class 'AbstractNode?'.
- 'AbstractNode' is from 'package:flutter/src/foundation/node.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/foundation/node.dart').
Try correcting the name to the name of an existing method, or defining a method named 'markNeedsPlacement'.
if (targetParent is RenderLayoutGrid) targetParent.markNeedsPlacement();
^^^^^^^^^^^^^^^^^^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_layout_grid-1.0.6/lib/src/widgets/placement.dart:84:54: Error: The method 'markNeedsLayout' isn't defined for the class 'AbstractNode?'.
- 'AbstractNode' is from 'package:flutter/src/foundation/node.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/foundation/node.dart').
Try correcting the name to the name of an existing method, or defining a method named 'markNeedsLayout'.
if (targetParent is RenderObject) targetParent.markNeedsLayout();
^^^^^^^^^^^^^^^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_layout_grid-1.0.6/lib/src/widgets/placement.dart:132:55: Error: A value of type 'RenderObject?' can't be assigned to a variable of type 'AbstractNode?'.
- 'RenderObject' is from 'package:flutter/src/rendering/object.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/rendering/object.dart').
- 'AbstractNode' is from 'package:flutter/src/foundation/node.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/foundation/node.dart').
final AbstractNode? targetParent = renderObject.parent;
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_layout_grid-1.0.6/lib/src/widgets/placement.dart:133:58: Error: The method 'markNeedsPlacement' isn't defined for the class 'AbstractNode?'.
- 'AbstractNode' is from 'package:flutter/src/foundation/node.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/foundation/node.dart').
Try correcting the name to the name of an existing method, or defining a method named 'markNeedsPlacement'.
if (targetParent is RenderLayoutGrid) targetParent.markNeedsPlacement();
^^^^^^^^^^^^^^^^^^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flutter_layout_grid-1.0.6/lib/src/widgets/placement.dart:134:54: Error: The method 'markNeedsLayout' isn't defined for the class 'AbstractNode?'.
- 'AbstractNode' is from 'package:flutter/src/foundation/node.dart' ('/C:/FlutterDev/flutter/packages/flutter/lib/src/foundation/node.dart').
Try correcting the name to the name of an existing method, or defining a method named 'markNeedsLayout'.
if (targetParent is RenderObject) targetParent.markNeedsLayout();
^^^^^^^^^^^^^^^
Target kernel_snapshot failed: Exception
FAILURE: Build failed with an exception.
* Where:
Script 'C:\FlutterDev\flutter\packages\flutter_tools\gradle\src\main\groovy\flutter.groovy' line: 1297
* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\FlutterDev\flutter\bin\flutter.bat'' 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.
> Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 11s
Exception: Gradle task assembleDebug failed with exit code 1
Exited (1).