jetc.dev Newsletter Issue #333

Published: 2026-09-29

This week, we got stable versions of Wear Compose and Nav3 for Compose, a patch release for Compose Multiplatform, plus our first glimpses of official A2UI support.

In addition, we see how CORS interacts with Compose for Web and explore an Android TV search screen composable, complete with on-screen keyboard.

Ooooo… What Did We Get?

Reviewing the release notes for the latest Jetpack Compose update!

While the alpha BOM got a bump to 2026.09.01, most of Compose did not get updated. Compose Material3 is up to 1.5.0-alpha29. onValueChange is now required on Slider() and RangeSlider(). In addition, some bugs were squashed.

Wear Compose shipped a stable 1.7.0! 🎉 And Nav3 for Compose released a stable 1.2.0! 🎊

Nav3 for Compose also released 1.3.0-alpha01. It fixes a predictive back animation issue.

Remote Compose is up to 1.0.0-alpha20, with a lot of additions to the RemotePathScope API.

Glance Adaptive reached 1.0.0-alpha03, albeit apparently without any developer-facing changes. Similarly, Glance for Wear shipped 1.0.0-alpha19 without any public changes.

Google finally released a Compose renderer for A2UI, a framework for allowing an LLM to generate a semi-arbitrary UI to present to users. I wrote a bit more about it in this Pedal Assist Coding newsletter issue. In terms of artifacts, we got:

androidx.a2ui:a2ui-engine:1.0.0-alpha01
androidx.a2ui:a2ui-model:1.0.0-alpha01
androidx.a2ui.compose:compose-runtime:1.0.0-alpha01
androidx.a2ui.compose:compose-ui:1.0.0-alpha01
androidx.a2ui.compose:compose-ui-testing:1.0.0-alpha01
androidx.compose.material3:material3-a2ui:1.0.0-alpha01

And, in other Compose-related artifact updates, we got:

androidx.activity:activity-compose:1.14.0-alpha03
androidx.fragment:fragment-compose:1.9.1
androidx.ink:ink-authoring-compose:1.1.0-alpha09
androidx.ink:ink-authoring-compose-android:1.1.0-alpha09
androidx.ink:ink-brush-compose:1.1.0-alpha09
androidx.ink:ink-brush-compose-android:1.1.0-alpha09
androidx.ink:ink-geometry-compose:1.1.0-alpha09
androidx.ink:ink-geometry-compose-android:1.1.0-alpha09
androidx.lifecycle:lifecycle-runtime-compose:2.12.0-alpha04 (and multiplatform targets)
androidx.lifecycle:lifecycle-viewmodel-compose:2.12.0-alpha04 (and multiplatform targets)
androidx.navigation:navigation-compose:2.10.2 (and multiplatform targets)
androidx.navigation:navigation-fragment-compose:2.10.2
androidx.navigationevent:navigationevent-compose:1.2.0-rc01 (and multiplatform targets)
androidx.savedstate:savedstate-compose:1.6.0-alpha04 (and multiplatform targets)
androidx.text:text-vertical-compose:1.0.0-beta02

Finally, JetBrains released Compose Multiplatform 1.12.1. LocalSystemTheme was added back in, albeit in deprecated form. Beyond that, this just fixes some bugs.

Composable Commentary

Posts, videos, and other new information related to Jetpack Compose!

Compose Multiplatform vs CORS

JetBrains’ Konstantin Tskhovrebov (Mastodon) points out that Compose for Web can run into the same CORS issues that any other Web app does. Konstantin demonstrates how to use Cloudflare Pages and Cloudflare Workers, plus a custom TypeScript proxy, to address CORS in your simple Web apps.

How to represent a fetching state: FetchingState

Marcin Moskala notes that typical loading/content/error wrappers fail to take refreshing into account, such as from PullToRefreshBox(). Marcin shows another approach to model these states including while the repository is refreshing the data.

Rendering AI agent generated UI using Jetpack Compose A2UI and Koog

John O’Reilly (Mastodon, Bluesky)explains how to integrate Google’s A2UI renderer for Compose into a Compose app. The rendering engine exposes a Surface() composable that processes the A2UI request; you need to place that Surface() somewhere suitable in your UI.

Resource Roundup

100% pure code!

GitHub: rock3r / jewel-tooling

Google’s Sebatiano Poggi (Mastodon, Bluesky)created a plugin for IntelliJ IDEA, aimed at Compose developers, that shows inlay hints for composable parameters noting their stability contract (or lack thereof), along with the imputed stability overall for the composable.

GitHub: halilozel1903 / android-tv-search-keyboard

Halil Özel brings us an on-screen keyboard designed for Android TV apps, specifically aimed at doing searches. It includes a search field and an area for live results, along with the keyboard grid and focus management.

GitHub: PiotrPrus / KBlobs

Piotr Prus (Bluesky) created… well, it’s a little hard to describe in words. If you want animated shapes somewhere between a lava lamp and the eyes of Hypnotoad, this library for Compose for Android and iOS may be of use. And, face it, everybody loves Hypnotoad!