Add Android Content Sizing Documentation

[mboetger]

Add Android Content Sizing Documentation.

This PR assumes flutter/samples#2787 has landed.

Presubmit checklist

• If you are unwilling, or unable, to sign the CLA, even for a tiny, one-word PR, please file an issue instead of a PR.
• If this PR is not meant to land until a future stable release, mark it as draft with an explanation.
• This PR follows the Google Developer Documentation Style Guidelines—for example, it doesn't use i.e. or e.g., and it avoids I and we (first-person pronouns).
• This PR uses semantic line breaks
  of 80 characters or fewer.

[gemini-code-assist]

Summary of Changes

Hello @mboetger, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the Android add-to-app documentation by introducing a comprehensive section on "Content-sized views." It explains how FlutterView can now dynamically adjust its dimensions based on its content, details the specific Flutter widgets that are incompatible with this feature due to sizing constraints, and provides a practical Dart code example to help developers test widget compatibility. This update aims to provide clearer guidance for integrating Flutter content into existing Android applications with flexible sizing requirements.

Highlights

• Introduction of Content-Sized Flutter Views: Documentation has been added for a new feature allowing FlutterView instances in Android add-to-app scenarios to size themselves based on their content using content_wrap for height or width.
• Restrictions for Content-Sized Views: The documentation outlines important restrictions, noting that widgets with unbounded sizes (like ListView) or those that defer to their children for sizing (like LayoutBuilder) are not supported for content-sized Flutter views.
• Example for Testing Widget Compatibility: A Dart code example is provided, demonstrating how to use UnconstrainedBox to test whether a specific Flutter widget can cause issues when used within a content-sized view.

🧠 New Feature in Public Preview: You can now enable Memory to help Gemini Code Assist learn from your team's feedback. This makes future code reviews more consistent and personalized to your project's style. Click here to enable Memory in your admin console.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request adds valuable documentation for content-sized FlutterViews on Android. The new section explains the concept, its restrictions, and provides a code example for testing widget compatibility. My review includes a suggestion to fix several typos and grammatical errors in the introductory paragraph to improve clarity and readability. Overall, this is a great addition to the documentation.

[flutter-website-bot]

Visit the preview URL for this PR (updated for commit 238cf96):

https://flutter-docs-prod--pr13000-content-sizing-documentatio-k1swh9bh.web.app

[sfshaza2]

This is great! Thanks so much, @mboetger! The example hasn't been updated yet, so I will go ahead and approve but not land.

[sfshaza2]

Approved, but don't land until the Flutter sample (linked above) has landed.