Here is the output of flutter doctor

C:\DevTools\flutter\bin\flutter.bat doctor --verbose
[√] Flutter (Channel stable, v1.9.1+hotfix.2, on Microsoft Windows [Version 6.1.7601], locale en-US)
    • Flutter version 1.9.1+hotfix.2 at C:\DevTools\flutter
    • Framework revision 2d2a1ffec9 (2 weeks ago), 2019-09-06 18:39:49 -0700
    • Engine revision b863200c37
    • Dart version 2.5.0

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.1)
    • Android SDK at C:/DevTools/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.1
    • ANDROID_HOME = C:/DevTools/Android/sdk
    • Java binary at: C:\DevTools\Android\studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
    • All Android licenses accepted.

[√] Android Studio (version 3.5)
    • Android Studio at C:\DevTools\Android\studio
    • Flutter plugin version 39.0.3
    • Dart plugin version 191.8423
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)

And build log

Launching lib\main.dart on SM G960F in debug mode...
Initializing gradle...
Resolving dependencies...
* Error running Gradle:
ProcessException: Process "D:\Projects\GitHub\flutter-app\android\gradlew.bat" exited abnormally:

  Command: D:\Projects\GitHub\flutter-app\android\gradlew.bat app:properties

Finished with error: Please review your Gradle project setup in the android/ folder.

Do you have any issue when building app like me?

I went to run the app and the following error occurred:

Launching lib/main.dart on sdk gphone x86 arm in debug mode... ../../flutter/.pub-cache/hosted/pub.dartlang.org/gradient_app_bar-0.1.3/lib/gradient_app_bar.dart:407:57: Error: No named parameter with the name 'nullOk'. final ScaffoldState scaffold = Scaffold.of(context, nullOk: true); ^^^^^^ ../../flutter/packages/flutter/lib/src/material/scaffold.dart:1944:24: Context: Found this candidate, but the arguments don't match. static ScaffoldState of(BuildContext context) {

                   ^^

../../flutter/.pub-cache/hosted/pub.dartlang.org/gradient_app_bar-0.1.3/lib/gradient_app_bar.dart:636:20: Error: The method 'ancestorRenderObjectOfType' isn't defined for the class 'BuildContext'.

• 'BuildContext' is from 'package:flutter/src/widgets/framework.dart' ('../../flutter/packages/flutter/lib/src/widgets/framework.dart'). Try correcting the name to the name of an existing method, or defining a method named 'ancestorRenderObjectOfType'. return context.ancestorRenderObjectOfType(

              ^^^^^^^^^^^^^^^^^^^^^^^^^^
  

FAILURE: Build failed with an exception.

• Where: Script '/home/zedki7/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 991
• What went wrong: Execution failed for task ':app:compileFlutterBuildDebug'.

Process 'command '/home/zedki7/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 11s Exception: Gradle task assembleDebug failed with exit code 1 Exited (sigterm)

I'm attempting to run this Flutter To-Do list app in Visual Studio Code:

And I'm encountering this error:

I/flutter (30973): Observatory server failed to start after 11 tries
I/flutter (30973): Could not start Observatory HTTP server:
I/flutter (30973): SocketException: Failed to create server socket (OS Error: Operation not permitted, errno = 1), address = 127.0.0.1, port = 0
[38;5;244mI/flutter (30973): #0      _NativeSocket.bind  (dart:io-patch/socket_patch.dart:736:7)[39;49m
I/flutter (30973): <asynchronous suspension>
[38;5;244mI/flutter (30973): #1      _RawServerSocket.bind  (dart:io-patch/socket_patch.dart:1394:26)[39;49m
[38;5;244mI/flutter (30973): #2      _ServerSocket.bind  (dart:io-patch/socket_patch.dart:1676:29)[39;49m
[38;5;244mI/flutter (30973): #3      ServerSocket._bind  (dart:io-patch/socket_patch.dart:1667:26)[39;49m
[38;5;244mI/flutter (30973): #4      ServerSocket.bind  (dart:io/socket.dart:382:27)[39;49m
[38;5;244mI/flutter (30973): #5      _HttpServer.bind  (dart:_http/http_impl.dart:2701:25)[39;49m
I/flutter (30973): #6      HttpServer.bind (dart:_http:229:19)
[38;5;244mI/flutter (30973): #7      Server.startup.poll  (dart:vmservice_io/vmservice_server.dart:410:36)[39;49m
I/flutter (30973): <asynchronous suspension>
I/flutter (30973): #8      Server.startup.poll (dart:vmservice_io/vmservice_server.dart)
[38;5;244mI/flutter (30973): #9      Server.startup  (dart:vmservice_io/vmservice_server.dart:422:23)[39;49m
I/flutter (30973): <asynchronous suspension>
I/flutter (30973): #10     main (dart:vmservice_io:262:12)

I'm running Windows 10 Home.

After doing some digging on the issue I have tried:

• Disabling antivirus (Windows Defender in my case)
• Disabling the firewall (Again Windows Defender)
• Followed suggestions from this post: https://stackoverflow.com/questions/55119887/observatory-server-failed-to-start-fails-to-create-socket-server

No success here.

On all my debug, main and profile AndroidManifest.xml files I have:

...
<uses-permission android:name="android.permission.INTERNET" />
...

Except on the main one I have:

...
<uses-permission android:name="android.permission.INTERNET" android:maxSdkVersion="18" />
...

On my pubsec.yaml file I have:

...
environment:
  sdk: ">=2.2.0 <3.0.0"
...

On my android/app/build.gradle file I have:

...
android {
    compileSdkVersion 28
...

Flutter Doctor:

[√] Flutter (Channel stable, v1.17.1, on Microsoft Windows [Version 10.0.18363.836], locale en-US)
    • Flutter version 1.17.1 at C:\SDK\FlutterSDK\flutter
    • Framework revision f7a6a7906b (4 weeks ago), 2020-05-12 18:39:00 -0700
    • Engine revision 6bc433c6b6
    • Dart version 2.8.2


[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at C:\Users\y_cha\AppData\Local\Android\sdk
    • Platform android-29, build-tools 29.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)
    • All Android licenses accepted.

[√] Android Studio (version 3.6)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 45.1.1
    • Dart plugin version 192.8052
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)

[√] VS Code (version 1.45.1)
    • VS Code at C:\Users\y_cha\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.11.0

[√] Connected device (2 available)
    • SM G975F                  • R58M43954DX   • android-arm64 • Android 10 (API 29)
    • Android SDK built for x86 • emulator-5554 • android-x86   • Android 10 (API 29) (emulator)

• No issues found!

Gradle version:

distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip

This issue happens on both the android emulator and my physical device.

I have seen this issue show up in many searches, but I haven't seen a definitive solution.

Anyone with any knowledge of a solution to this please help.

Thanks.

Hi, I'm new to Flutter development, and I found your app beautiful, I would like to try it out and see the features. But I went to run the app and the following error occurred:

• Error running Gradle: ProcessException: Process "D:\Projetos\flutter\Exemplos\Flutter_Todolist\android\gradlew.bat" exited abnormally:

FAILURE: Build failed with an exception.

• Where: Build file 'D:\Projetos\flutter\Exemplos\Flutter_Todolist\android\app\build.gradle' line: 53

• What went wrong: A problem occurred evaluating project ':app'.

path may not be null or empty string. path='null'

How can I resolve this ?

Hi, I didn't see a license in the repo but the README text mentioned the app's free. Can I use the screenshot in an article on Flutter? It's beautiful for showing off Flutter's native tool kit

Hi! I hope you don't mind me using this for a school assignment. Since this is a UI kit, I have added a ListView and a button to create subtasks when the user creates a new task. Additionally, since this project is using an older version of Flutter, I would create a lot of warnings when the app is compiled on an emulator. I have changed some lines in AndroidManifest.xml and MainActivity.java so that it would give fewer errors during compilation!

The images look a bit distorted on most devices.. It would have been better if you could use a custom font based Icon or svg files maybe? Other than that it looks Awesome. Good Job