The method 'then' isn't defined for the class 'FutureOr<dynamic>' #176

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1. bmabir17 commented on Oct 26, 2021

   

   bmabir17

   on Oct 26, 2021

   More actions

   I am facing the same error.

   ../../../snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/mp_chart-0.2.2/lib/mp/core/utils/painter_utils.dart:15:34: Error: The getter 'text' isn't defined for the class 'InlineSpan'.
    - 'InlineSpan' is from 'package:flutter/src/painting/inline_span.dart' ('../../../snap/flutter/common/flutter/packages/flutter/lib/src/painting/inline_span.dart').
   Try correcting the name to the name of an existing getter, or defining a getter or field named 'text'.
         var preText = painter.text.text;                                  
                                    ^^^^                                   
   ../../../snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/mp_chart-0.2.2/lib/mp/chart/chart.dart:51:12: Error: The method 'then' isn't defined for the class 'FutureOr<dynamic>'.
   Try correcting the name to the name of an existing method, or defining a method named 'then'.
             .then((value) {                                               
              ^^^^                                                         
                                                                           
                                                                           
   FAILURE: Build failed with an exception.                                
                                                                           
   * Where:                                                                
   Script '/home/bmabir/snap/flutter/common/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 1035
                                                                           
   * What went wrong:                                                      
   Execution failed for task ':app:compileFlutterBuildDebug'.              
   > Process 'command '/home/bmabir/snap/flutter/common/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. Run with --scan to get full insights.
                                                                           
   * Get more help at https://help.gradle.org                              
                                                                           
   BUILD FAILED in 25s
   

   flutter doctor -v output

   [✓] Flutter (Channel stable, 2.2.1, on Linux, locale en_US.UTF-8)
       • Flutter version 2.2.1 at /home/bmabir/snap/flutter/common/flutter
       • Framework revision 02c026b03c (5 months ago), 2021-05-27 12:24:44 -0700
       • Engine revision 0fdb562ac8
       • Dart version 2.13.1
   
   [✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
       • Android SDK at /home/bmabir/Android
       • Platform android-30, build-tools 29.0.3
       • Java binary at: /usr/bin/java
       • Java version OpenJDK Runtime Environment (build 1.8.0_292-8u292-b10-0ubuntu1~20.04-b10)
       • All Android licenses accepted.
   
   [✓] Chrome - develop for the web
       • Chrome at google-chrome
   
   [!] Android Studio (not installed)
       • Android Studio not found; download from https://developer.android.com/studio/index.html
         (or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).
   
   [✓] VS Code (version 1.61.1)
       • VS Code at /usr/share/code
       • Flutter extension version 3.27.0
   
   [✓] Connected device (2 available)
       • Mi A2 Lite (mobile) • 28d9cc140205 • android-arm64  • Android 10 (API 29)
       • Chrome (web)        • chrome       • web-javascript • Google Chrome 94.0.4606.8
   

   And my pubspec.yaml

   environment:
     sdk: ">=2.7.0 <3.0.0"
     flutter: 1.17.5
   
   dependencies:
     flutter:
       sdk: flutter
   
     rxdart: ^0.23.0
     flutter_bloc: ^5.0.1
     provider: ^4.3.1
     fluttertoast: ^7.0.1
     math_expressions: ^2.0.0
     moor_flutter: ^3.1.0
     sqlite3_flutter_libs: ^0.5.0
     path_provider: ^1.6.11
     path: ^1.6.4
     table_calendar: ^2.2.3
     intl: ^0.16.1
     percent_indicator: ^2.1.5
     date_range_picker: ^1.0.5
     mp_chart: ^0.2.2
     shared_preferences: 0.5.8
     csv: ^4.0.3
     moor_generator: ^3.2.0
     build_runner: ^1.10.0
   
     # The following adds the Cupertino Icons font to your application.
     # Use with the CupertinoIcons class for iOS style icons.
     cupertino_icons: ^0.1.3
   
2. bmabir17 commented on Oct 26, 2021

   

   bmabir17

   on Oct 26, 2021

   More actions

   #155 (comment) this solution solves the following error temporarily.

   Try correcting the name to the name of an existing getter, or defining a getter or field named 'text'.
         var preText = painter.text.text;                                  
                                    ^^^^ 
   

   But the other one remains

   Try correcting the name to the name of an existing method, or defining a method named 'then'.
             .then((value) {                                               
              ^^^^            
   
3. qwales1 commented on Oct 28, 2021

   

   qwales1

   on Oct 28, 2021

   Contributor

   More actions

   @bmabir17 this seems to solve the other error for me.

    _screenshotController
           .capture(path: path, pixelRatio: 3.0)
           .then((imgFile) async {
         await ImageGallerySaver.saveImage(
             Uint8List.fromList(imgFile.readAsBytesSync()));
         imgFile.delete();
   
         isCapturing = false;
       }).catchError((error) {
         isCapturing = false;
       });
   
4. lyf571321556 commented on Dec 24, 2021

   

   lyf571321556

   on Dec 24, 2021

   Last edited by lyf571321556

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   same issue on flutter 2.8.1
5. andymeadows commented on Mar 31, 2022

   

   andymeadows

   on Mar 31, 2022

   Last edited by andymeadows

   More actions

   This appears to be the result of a change with the image_gallery_saver library and its change of ImageGallerySaver.saveImage now returning a FutureOr instead of a Future. If you don't want to deal with editing the pub cache (a PR would be great for the project), you can add to your pubspec.yaml file the following:

   mp_chart: ^0.3.1
   image_gallery_saver: <1.7.1
   

   Didn't play around with the versioning too much, but the above seems to get the latest "compatible" versions.

   Still have to fix the cast to painter.text to TextSpan, so not sure what this buys you.