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Below you'll find ways to get involved in the Flutter developer community as well as links to resources that can help answer your questions. We expect all community spaces to be welcoming and respectful, as described in the Flutter code of conduct.
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Flutter - how to remove default padding (48 px as per doc) from widgets (IconButton, CheckBox, FlatButton) 0. A RenderFlex overflowed by 729 pixels on the bottom. In SingleChildScrollView. How to fix black screen in flutter while Navigating? 0 “TextField ” inside Row causes overflow flutter. A widget that positions its children relative to the edges of its box. This class is useful if you want to overlap several children in a simple way, for example having some text and an image, overlaid with a gradient and a button attached to the bottom. Stack (Flutter Widget of the Week).

  1. 'Uses C#', 'No need to learn separate language or technology' and 'Supports making a single page application' are the key factors why developers consider Blazor; whereas 'Hot Reload', 'Cross platform' and 'Performance' are the primary reasons why Flutter is favored.
  2. Each child of a Stack widget is either positioned or non-positioned.Positioned children are those wrapped in a Positioned widget that has at least one non-null property. The stack sizes itself to contain all the non-positioned children, which are positioned according to alignment (which defaults to the top-left corner in left-to-right environments and the top-right corner in right-to-left.
  3. Flutter — Slack Redesign Challenge: What I learned from it. Originally published by Salmaan Ahmed on January 24th 2019 2,309 reads @ salmaan-ahmed Salmaan Ahmed.

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Join the conversation

Get answers to your questions and stay up to date with everything new and exciting happening in the Flutter community by checking out the links below.

Stack Overflow

Ask questions about specific Flutter coding problems, or find answers to questions that have already been asked.

Gitter

Join the conversation and stay connected with developers around the globe building with Flutter.

Meetup

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@FlutterDev

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Medium

Slack Flutter Study Group

Get the latest news and insights from a diverse group of users building with Flutter.

Flutter Community Slack

Connect and work through problems with a group of knowledgeable Flutter people.

Flutter YouTube

Watch these videos to learn from Google and developers as you build with Flutter.

r/FlutterDev

Join the large community on Reddit with discussions around every aspect of Flutter.

Discord

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UX Research

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Hashnode

Read and write Flutter-related posts, participate in Flutter discussions or ask questions about working with Flutter.

Contributing to Flutter

If you are interested in joining us in creating Flutter itself, jump over to our GitHub repository to get started!

How to build a Flutter app with codemagic.yaml


Setting up a Flutter project

The apps you have available in Codemagic are listed on the Applications page. See how to add additional apps here.

  1. On the Applications page, click Set up build next to the app you want to start building.
  2. On the popup, select Flutter App as the project type and click Continue.
  3. Then you can choose to either set up your builds in the codemagic.yaml file or select the Workflow Editor tab to configure the builds in the UI.

codemagic.yaml is a highly customizable configuration file that you can use to build, test and publish Flutter apps, widgets, and Flutter or Dart packages. The Workflow Editor is a quick way to get started building standard Flutter applications.

You can simultaneously set up workflows both in codemagic.yaml and the Workflow Editor. However, when a codemagic.yaml is detected in the repository, it is automatically used for configuring builds that are triggered in response to the events defined in the file and any configuration in the Flutter workflow editor is ignored.

For documentation on building Flutter projects using the workflow editor, please refer to Building Flutter apps via the workflow editor.

Exporting configuration from the Flutter workflow editor

You can get started with YAML easily if you have an existing project set up in Codemagic UI.

  1. Navigate to your app workflow settings.
  2. In the Configuration as code section on the right sidebar, click Download configuration.
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The YAML feature currently has the following limitations:

  • Exporting configuration from the workflow editor is supported for Flutter-based Android, iOS and web apps.
  • The exported configuration is not identical to the settings in the workflow editor and lacks the configuration for some features, such as Stop build if tests fail and publishing to Codemagic Static Pages.

Building with YAML

  1. In order to use codemagic.yaml for build configuration in Codemagic, commit the file to the root directory of your repository.
  2. Back in app settings in Codemagic, select the codemagic.yaml tab.
  3. Scan for the codemagic.yaml file by selecting a branch to scan and clicking the Check for configuration file button at the top of the page. Note that you can have different configuration files in different branches.
  4. If a codemagic.yaml file is found in that branch, you can click Start your first build and select the branch and workflow to build.
  5. Finally, click Start new build to build the app.

Android builds

You can find an up-to-date codemagic.yaml Flutter Android workflow in Codemagic Sample Projects.

Set up local properties

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Building .apk

Building universal .apk(s) from existing app bundle(s) with user-specified keys

If your app settings in Codemagic have building Android App Bundles enabled, we will automatically include a script for generating a signed app-universal.apk during the YAML export. If you are creating a YAML file from a scratch, add the following script to receive the .apk file(s):

Please make sure to wrap the --bundle pattern in single quotes. If --bundle option is not specified, default glob pattern **/*.aab will be used.

More information about Android code signing can be found here.

Codemagic uses the android-app-bundle utility to build universal .apk files from Android App Bundles.

iOS builds

You can find an up-to-date codemagic.yaml Flutter iOS workflow in Codemagic Sample Projects.

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Building an unsigned application .app

Building a signed iOS application archive .ipa

Codemagic uses the xcode-project to prepare iOS application code signing properties for build.

Read more about the different schemes in Apple’s documentation.

Flutter Slack Integration

Note: If you are using Flutter version 1.24.0-6.0 or higher, the recommended command for building an .ipa archive is flutter build ipa as shown below. Read more about it in Flutter’s documentation.

Web builds

Testing, code signing and publishing a Flutter app

To test, code sign and publish a Flutter app:

  • Testing examples for a flutter app can be found here.
  • All iOS and Android applications need to be signed before release. Different script examples are available here.
  • All generated artifacts can be published to external services. The available integrations currently are email, Slack, Google Play and App Store Connect. It is also possible to publish elsewhere with custom scripts. Script examples for different options are available here.
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