February 2026 (2026-02) monthly summary for dotnet/android. Delivered build-system enhancements to improve Android API level governance and NativeAOT linking reliability, and introduced a JNI preload exemption mechanism to optimize startup. Changes establish a single source of truth for NDK API levels, ensure NativeAOT and non-mono builds link against the correct Android API, and provide granular control over JNI library preload, delivering enhanced runtime stability and faster startup across CoreCLR, NativeAOT, and Mono runtimes.

January 2026 focused on strengthening Android testing workflows, stabilizing build output, and improving NativeAOT startup behavior, delivering measurable business value through more reliable tests, quieter local builds, and faster startup paths.

December 2025 monthly highlights for the dotnet/android team. Focused on expanding cross-runtime testing coverage for Xamarin Android across MonoVM, CoreCLR, and NativeAOT, plus packaging reliability improvements to meet store requirements. Delivered a scalable testing framework with runtime-aware test generation and parameterization, enhanced CI feedback for test failures, and a packaging fix to ensure compliance with Amazon App Store checks. The work reduced risk in multi-runtime builds, increased test coverage, and demonstrated strong collaboration across testing, packaging, and runtime teams.

November 2025: Delivered cross-runtime Android testing enhancements, expanded multi-runtime test coverage (including NativeAOT), improved logging reliability and initialization, and relaxed 64-bit native library alignment to Android requirements. The work resulted in faster feedback loops, broader runtime compatibility, and improved debuggability across Android runtimes.

2025-10 Monthly summary for dotnet/android: Focused on stability and correctness in JNI preload cache generation to improve cross-RID reliability and dotnet publish success. Primary work fixed a bug in JNI preload cache per-RID index arrays, preventing incorrect indices and symbol lookup failures during library loading.

September 2025 monthly summary for dotnet/android focusing on NativeAOT Android host work and runtime improvements. Highlights include groundwork for NativeAOT hosting on Android, improved library loading performance, stability and diagnostics enhancements, and environment handling with static libc++ for smaller package size and consistency across MonoVM/CoreCLR. This work lays the foundation for faster startups, better reliability, and easier cross-runtime compatibility.

August 2025 delivered robust Android build tooling and packaging improvements across the dotnet/android repo. Key deliverables include updating the Android NDK (r28c) and fixing 7z unpacking with symlinks to ensure reliable builds, hardening environment variable handling for odd counts, enabling Debian unstable (forky/sid) recognition for future releases, and implementing native runtime size optimization with symbol stripping and removal of unused exception sections.

July 2025 monthly summary for repository dotnet/android. Focused on performance, size, and build-time improvements for CoreCLR on Android and Unix platforms. Delivered three core initiatives that reduce startup time, shrink binary size, and improve build distribution: native typemap refactor, Unix assembly loading optimization, and static linking of the CoreCLR runtime for Android.

Month: 2025-06. Summary of work on dotnet/android focusing on safety, robustness, and performance improvements in the Android runtime and dynamic loading. Delivered features to modernize DSO loading, hardened library loading, and reduced startup overhead. Addressed critical bug in FastDev arm64 and updated manifest test. Resulted in improved reliability, reduced relocations and binary size, and clearer runtime behavior.

May 2025 monthly development summary for dotnet/android focusing on performance, reliability, and developer experience across Android and CoreCLR interop. Delivered logging and string-view optimizations, NRT stability improvements, enhanced Java<->.NET typemaps for debug builds, faster Android dev loop via fastdev assemblies, and .NET 10–compliant P/Invoke updates. These work items reduce runtime diagnostics overhead, minimize build-time friction, and ensure forward compatibility with evolving .NET interop.

April 2025 monthly summary for dotnet/android: Delivered three core enhancements across NativeAOT tooling, timing instrumentation, and NDK integration. The adaptive NativeAOT debugger script now dynamically locates NDK toolchains and LLVM versions, replacing brittle hardcoded paths for cross-env reliability. A shared internal timing infrastructure was introduced across MonoVM and CoreCLR hosts with a thread-local timing stack, file-based dumps, and a function-timing utility, enabling accurate performance profiling. Native library linking was standardized with a common infrastructure and build-tool updates to extract and package necessary NDK libraries into workload packs, plus standardized linker invocations for consistent builds across targets. These changes reduce setup complexity, improve cross-environment robustness, simplify maintenance, and enable better performance analysis.

March 2025: Delivered critical Android platform enhancements and improved cross-language interoperability while stabilizing the build pipeline. Upgraded NDK and toolchain, integrated CoreCLR host into the Android build flow, expanded P/Invoke capabilities, and cleaned up tooling to prevent build-time failures, resulting in faster project setup and more reliable releases.

February 2025 monthly summary focusing on progress across dotnet/android and dotnet/runtime. Delivered foundational CoreCLR hosting groundwork for Xamarin.Android, added Unicode string support in LLVM IR generation, and introduced a host-provided assembly data callback to enable standard .NET for Android apps. No major bug fixes reported in this period. The work enhances platform parity with CoreCLR, improves string handling and code generation, and lays the groundwork for future performance improvements and broader app compatibility.

January 2025 monthly summary: Platform modernization and mobile enablement across two core repos (dotnet/android and dotnet/runtime). Focused on delivering business value through build quality improvements, safer logging, and groundwork for Android CoreCLR deployment. Key initiatives include native build modernization with libc++, improved logging via std::format, symbol/version management, and initial Android+CoreCLR build/deploy infrastructure to broaden mobile platform coverage.

Monthly summary for 2024-12 focusing on dotnet/android contributions. Summary: In December, the team delivered a substantial C++ runtime modernization and refactor for the dotnet/android repo, introducing C++23 features, replacing preprocessor macros with templated functions, adopting std::string_view for literals, strengthening noexcept usage, and removing unused code. While no separate bug fixes were documented for this period, the refactor reduces defect risk and simplifies future maintenance. This work improves runtime safety, readability, and maintainability, enabling faster future iterations and cross-platform readiness.

Concise monthly summary for 2024-11 focusing on the dotnet/android repository. Key changes include an Android NDK update, a localization-related bug fix, and a performance/stability improvement by re-enabling LLVM marshal methods. The work enhanced toolchain alignment, localization reliability, and runtime performance for Android apps, with clear business value in smoother builds and more reliable user experiences.

2024-10 Monthly Summary for dotnet/android: Focused on delivering correctness, performance, and code quality improvements in the Android build and native components. This period emphasized stabilizing split APK handling, reducing unnecessary work during startup, and modernizing native code using C++23 features for safer, clearer semantics. The work aligns with performance and reliability goals, reduces maintenance overhead, and enhances long-term scalability of the Android contributor experience.