androidx/androidx
Jun 2025 – Mar 2026
9 Months active
Languages Used
JavaKotlinGradleTOML
Technical Skills
3D MathAPI DesignAndroid DevelopmentCode RenamingComposeJetpack Compose
Moonwon Lee
PROFILE
Moonwon Lee
Moonwon Lee developed and maintained advanced 3D spatial UI features for the androidx/androidx repository, focusing on XR and Compose-based Android development. Over nine months, Lee delivered 22 features and fixed four bugs, building robust APIs for 3D layout, pose math, and spatial interaction. Using Kotlin and Java, Lee refactored core modules for clarity, introduced testable 3D bounding boxes, and enforced safer API usage through input validation and documentation. The work emphasized maintainability, test coverage, and alignment with Compose UI conventions, resulting in more predictable layouts, reduced regression risk, and improved developer ergonomics for teams integrating spatial computing into Android applications.
Overall Statistics
Feature vs Bugs
85%Features
Repository Contributions
47Total
Bugs
4
Commits
47
Features
22
Lines of code
9,678
Activity Months9
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5007 peopleSame Organization
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481
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Work History
March 2026
3 Commits • 1 Features
Mar 1, 2026Monthly summary for 2026-03 (androidx/androidx). Focused on making scale handling and SubspaceNode API behavior more reliable through documentation and testing groundwork, and by adding verifiable alignment test coverage. This work reduces API misuse risk, accelerates future feature work, and strengthens XR stability.
3 Commits • 1 Features
Mar 1, 2026Monthly summary for 2026-03 (androidx/androidx). Focused on making scale handling and SubspaceNode API behavior more reliable through documentation and testing groundwork, and by adding verifiable alignment test coverage. This work reduces API misuse risk, accelerates future feature work, and strengthens XR stability.
March 2026
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 (2026-02) monthly recap for androidx/androidx: API safety improvements and dependency readiness for the JXR March release. Key outcomes include enforcing rotation angle specification for SubspaceModifier.rotate to eliminate silent no-ops, and upgrading XR libraries to align with upcoming features and fixes. These efforts improve API correctness, developer guidance, and forward-compatibility, reducing runtime bugs and maintenance risk.
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 (2026-02) monthly recap for androidx/androidx: API safety improvements and dependency readiness for the JXR March release. Key outcomes include enforcing rotation angle specification for SubspaceModifier.rotate to eliminate silent no-ops, and upgrading XR libraries to align with upcoming features and fixes. These efforts improve API correctness, developer guidance, and forward-compatibility, reducing runtime bugs and maintenance risk.
January 2026
2 Commits • 2 Features
Jan 1, 2026Monthly summary for 2026-01 (repo: androidx/androidx). Delivered two key features across the androidx/androidx repository and addressed API clarity and stability improvements. 1) SubspaceSemanticsInfo API encapsulation tightened to LIBRARY_GROUP, restricting visibility to internal artifacts and strengthening API integrity; this reduces external usage risk and improves maintainability. 2) API Rename: rotateToLookAtUser, migrating from lookAtUser to rotateToLookAtUser with upDirection; refactored samples and documentation to reflect the clearer naming and improved discoverability for Compose and 3D developers. These changes were accompanied by targeted fixes associated with internal issues (473603801, 469148205 for the first feature; 467993050 for the rename). All related unit tests pass, and affected testapps have been validated on emulator where applicable. Business impact includes a safer API surface, clearer developer experience, and smoother long-term maintenance across the library.
2 Commits • 2 Features
Jan 1, 2026Monthly summary for 2026-01 (repo: androidx/androidx). Delivered two key features across the androidx/androidx repository and addressed API clarity and stability improvements. 1) SubspaceSemanticsInfo API encapsulation tightened to LIBRARY_GROUP, restricting visibility to internal artifacts and strengthening API integrity; this reduces external usage risk and improves maintainability. 2) API Rename: rotateToLookAtUser, migrating from lookAtUser to rotateToLookAtUser with upDirection; refactored samples and documentation to reflect the clearer naming and improved discoverability for Compose and 3D developers. These changes were accompanied by targeted fixes associated with internal issues (473603801, 469148205 for the first feature; 467993050 for the rename). All related unit tests pass, and affected testapps have been validated on emulator where applicable. Business impact includes a safer API surface, clearer developer experience, and smoother long-term maintenance across the library.
January 2026
December 2025
5 Commits • 3 Features
Dec 1, 2025Month: 2025-12 — Delivered targeted XR enhancements to androidx/androidx, emphasizing semantics and layout API clarity, API surface safety, and developer ergonomics. The work focused on API organization, documentation quality, input validation, and alignment with Compose UI conventions, driving safer apps and smoother adoption for XR features.
December 2025
5 Commits • 3 Features
Dec 1, 2025Month: 2025-12 — Delivered targeted XR enhancements to androidx/androidx, emphasizing semantics and layout API clarity, API surface safety, and developer ergonomics. The work focused on API organization, documentation quality, input validation, and alignment with Compose UI conventions, driving safer apps and smoother adoption for XR features.
October 2025
7 Commits • 4 Features
Oct 1, 2025October 2025 monthly summary for androidx/androidx focused on Subspace improvements, lifecycle-safe animations, and documentation updates. Key outcomes include expanded API surface for sizing, a reactive onSizeChanged callback, robust synchronization of UserSubspace, safer animation lifecycles, and guidance to prevent z-fighting artifacts in independent Subspaces. These changes enhance layout determinism, reduce runtime risk, and improve developer productivity with clearer behavior and better test coverage.
7 Commits • 4 Features
Oct 1, 2025October 2025 monthly summary for androidx/androidx focused on Subspace improvements, lifecycle-safe animations, and documentation updates. Key outcomes include expanded API surface for sizing, a reactive onSizeChanged callback, robust synchronization of UserSubspace, safer animation lifecycles, and guidance to prevent z-fighting artifacts in independent Subspaces. These changes enhance layout determinism, reduce runtime risk, and improve developer productivity with clearer behavior and better test coverage.
October 2025
September 2025
11 Commits • 4 Features
Sep 1, 2025September 2025 highlights for androidx/androidx XR initiatives: Delivered core pose math correctness, API usability improvements, and strengthened test infrastructure. These changes enhance spatial accuracy, developer ergonomics, and reliability across devices and test environments.
September 2025
11 Commits • 4 Features
Sep 1, 2025September 2025 highlights for androidx/androidx XR initiatives: Delivered core pose math correctness, API usability improvements, and strengthened test infrastructure. These changes enhance spatial accuracy, developer ergonomics, and reliability across devices and test environments.
August 2025
6 Commits • 2 Features
Aug 1, 2025August 2025 focused on API modernization and maintainability for Subspace layout in androidx/androidx. Implemented SubspaceModifiers to codify sizing constraints, refactored Subspace composables to leverage modifiers, and renamed NestedSubspace to PanelEmbeddedSubspace. Added gravityAligned modifier and parent coordinate access to SubspaceLayoutCoordinates, with tests validating sizing, alignment, and API changes. Documented the 2D UI to 3D scene translation math in RememberCalculatePose.kt to improve onboarding and reduce future confusion, with no behavioral changes. Strengthened test coverage around sizing and alignment to reduce regressions and stabilize the API for downstream teams.
6 Commits • 2 Features
Aug 1, 2025August 2025 focused on API modernization and maintainability for Subspace layout in androidx/androidx. Implemented SubspaceModifiers to codify sizing constraints, refactored Subspace composables to leverage modifiers, and renamed NestedSubspace to PanelEmbeddedSubspace. Added gravityAligned modifier and parent coordinate access to SubspaceLayoutCoordinates, with tests validating sizing, alignment, and API changes. Documented the 2D UI to 3D scene translation math in RememberCalculatePose.kt to improve onboarding and reduce future confusion, with no behavioral changes. Strengthened test coverage around sizing and alignment to reduce regressions and stabilize the API for downstream teams.
August 2025
July 2025
3 Commits • 1 Features
Jul 1, 2025July 2025 – androidx/androidx: Key features delivered include a Spatial Composition refactor improving clarity and layout alignment; major bug fixed in SpatialDialog unit test dismissal logic. Overall impact: clearer architecture, improved test reliability, and better state management integration, delivering business value through maintainable code and fewer flaky tests. Technologies demonstrated: Kotlin, AndroidX module refactoring, unit testing, and state-management patterns.
July 2025
3 Commits • 1 Features
Jul 1, 2025July 2025 – androidx/androidx: Key features delivered include a Spatial Composition refactor improving clarity and layout alignment; major bug fixed in SpatialDialog unit test dismissal logic. Overall impact: clearer architecture, improved test reliability, and better state management integration, delivering business value through maintainable code and fewer flaky tests. Technologies demonstrated: Kotlin, AndroidX module refactoring, unit testing, and state-management patterns.
June 2025
8 Commits • 4 Features
Jun 1, 2025June 2025 monthly review for androidx/androidx: Delivered API refactors and new 3D space support with a focus on accessibility, testability, and layout correctness. Implemented Subspace API surface unrestrict and policy refactor to SubspaceMeasurePolicy, added a 3D BoundingBox with tests, introduced recommendedContentBoxInFullSpace for layout constraints, and made DP_PER_METER dynamic to improve unit testability. These changes reduce API surface friction, enable more robust testing, and establish a stronger foundation for space-aware UI components.
8 Commits • 4 Features
Jun 1, 2025June 2025 monthly review for androidx/androidx: Delivered API refactors and new 3D space support with a focus on accessibility, testability, and layout correctness. Implemented Subspace API surface unrestrict and policy refactor to SubspaceMeasurePolicy, added a 3D BoundingBox with tests, introduced recommendedContentBoxInFullSpace for layout constraints, and made DP_PER_METER dynamic to improve unit testability. These changes reduce API surface friction, enable more robust testing, and establish a stronger foundation for space-aware UI components.
June 2025
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Quality Metrics
Correctness96.2%
Maintainability94.2%
Architecture92.8%
Performance88.6%
AI Usage20.8%
Skills & Technologies
Programming Languages
GradleJavaKotlinTOML
Technical Skills
3D Graphics3D Graphics Programming3D MathAPI DesignAPI DevelopmentAPI DocumentationAndroid DevelopmentAndroid XRAndroid developmentCode CleanupCode RenamingComposeCompose UICoroutinesDebugging
Repositories Contributed To
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