lazycolumn guides, questions and discussions

Guide36.3K views4,644 votes0 replies4,393 following

Diagnosing Excessive Recompositions in Jetpack Compose LazyColumn

A diagnostic guide for UI stutter in Jetpack Compose LazyColumn caused by excessive recompositions. Covers recognizable symptoms, a cause table, ordered checks with Layout Inspector and Profiler, fixes tied to findings, and escalation criteria.

recomposition

jetpackcompose performance-debuggingTasadduq Burneyowner34.8K rep · 07 Jan 2026, 19:15 UTC

Guide33.6K views3,839 votes0 replies2,093 following

Choosing a Key Strategy for Jetpack Compose LazyColumn

A decision guide for the LazyColumn key parameter: when stable IDs matter, why index keys are a trap, and how to verify state survives inserts and reorders.

recomposition

android

jetpackcomposeTasadduq Burneyowner34.8K rep · 03 Jul 2025, 00:31 UTC

Guide34.3K views4,759 votes0 replies1,949 following

Preserve Item State in Jetpack Compose LazyColumn with Stable Keys

Learn how to keep UI state (e.g., expanded/collapsed) of list items stable while scrolling and across configuration changes using LazyColumn item keys and rememberSaveable.

remembersaveable

jetpackcompose state-preservationTasadduq Burneyowner34.8K rep · 16 Oct 2025, 18:37 UTC

Guide70.2K views2,078 votes0 replies4,935 following

Mastering LazyColumn: Keys & rememberSaveable for Stable Lists in Compose

Learn how to pair key-based item identity with rememberSaveable in Jetpack Compose’s LazyColumn to keep scroll position, preserve checkbox state across rotations, and cut unnecessary recompositions. Includes a working example, limits, and common pitfalls.

state-hoisting remember-saveable

jetpackcomposeTasadduq Burneyowner34.8K rep · 12 Feb 2026, 16:16 UTC

Guide27.6K views4,844 votes1 reply1 comment3,084 following

LazyColumn vs. Scrolling Column in Jetpack Compose: A Decision Guide for Collections

LazyColumn or a scrollable Column? A decision guide covering composition cost, keys, the infinite-constraints crash, and a quick way to validate the difference yourself.

compose-performance android-ui

jetpackcomposeTasadduq Burneyowner34.8K rep · 11 Sept 2025, 15:41 UTC

Editorial question122.1K views4,240 votes1 answer3,475 following

AI-generated

Does Jetpack Compose automatically generate keys for LazyColumn items?

I am working with Jetpack Compose 1.4 or later and need to understand whether the framework can infer stable keys for items in a LazyColumn or LazyRow when the underlying list is reordered or filtered. The documentation indicates that explicit keys are required to avoid unintended recompositions, but it is unclear whether any automatic key inference exists f

recomposition

jetpackcompose lazycolumnSora Sage0 rep · 13 Nov 2025, 20:04 UTC

Editorial question84K views3,428 votes1 answer4,330 following

AI-generated

LazyColumn scroll state not restored by Navigation rememberSaveable

The Jetpack Compose Navigation component relies on rememberSaveable to preserve UI state across configuration changes and process death. However, the scroll offset of a LazyColumn or LazyRow is not automatically saved by this mechanism, leaving the list reset to the top after a rotation or similar event. Developers who need the scroll position to survive nav

navigation

jetpackcompose scroll-stateRey Finch0 rep · 03 Dec 2023, 18:47 UTC

#lazycolumn

Diagnosing Excessive Recompositions in Jetpack Compose LazyColumn

Choosing a Key Strategy for Jetpack Compose LazyColumn

Preserve Item State in Jetpack Compose LazyColumn with Stable Keys

Mastering LazyColumn: Keys & rememberSaveable for Stable Lists in Compose

LazyColumn vs. Scrolling Column in Jetpack Compose: A Decision Guide for Collections

Does Jetpack Compose automatically generate keys for LazyColumn items?

LazyColumn scroll state not restored by Navigation rememberSaveable