Avatar

Kai | Deep Android Engineering Notes

Deep notes on Android Framework, performance, Jetpack Compose, Kotlin, on-device AI, and mobile engineering.

Deep Android Engineering Notes

Android engineering knowledge base cover

A searchable knowledge base for Android Framework internals, performance optimization, Jetpack Compose, Kotlin coroutines, on-device AI, CI/CD, and mobile architecture.

Topic IndexLatest Posts

Topic Index

Android Framework

Binder, system services, process and thread models, permissions, ContentProvider, and Framework internals.

Android Performance

Cold start, rendering, memory, Bitmap, Perfetto, Macrobenchmark, and production stability.

Jetpack Compose

Recomposition, stability, Modifier internals, gestures, animation, Glance, and View interoperability.

Kotlin and Coroutines

Coroutines, Flow, StateFlow, SharedFlow, the K2 compiler, and multiplatform engineering.

Android On-device AI

Gemini Nano, AICore, NNAPI, on-device LLMs, RAG, multimodal inference, and model governance.

Mobile Engineering

CI/CD, testing, Gradle build systems, modularization, architecture evolution, and team practices.

AI Development Tools

Codex, prompt engineering, Ollama, OpenClaw, and practical AI agent engineering.

Writing

Isolated-Process Inference for Android On-Device AI

Use a separate Android process and AIDL to isolate model memory and native crashes while preserving reliable inference lifecycle management.

Android ARCore: SLAM, Environment Understanding, and Light Estimation

Build stable Android AR experiences by understanding ARCore tracking, planes and depth, light estimation, rendering timing, and Compose integration.

Observability for Android On-Device AI Inference

Trace each on-device inference, build multi-dimensional performance profiles, and detect production regressions across fragmented Android hardware.

Android Text Layout: StaticLayout, FontMetrics, and LineBreaker

Learn Android text layout internals, from StaticLayout and font metrics to LineBreaker strategies and custom View rendering.

Android Overlay Windows: Permissions, WindowManager, and Compatibility

Build reliable Android overlay windows across platform versions, with permission handling, touch behavior, and OEM compatibility guidance.

Android Storage Access Framework: DocumentsProvider and DocumentFile

Understand how SAF unifies local and cloud documents through content URIs, DocumentsProvider, URI grants, and DocumentFile.

Privacy-First On-Device AI on Android

Build privacy-aware Android on-device AI with data minimization, transparent decisions, and audit-ready engineering practices.

ONNX Runtime on Android: Export, Quantize, and Run Models

An end-to-end guide to ONNX Runtime for Android, from export and integration through INT8 acceleration and operator compatibility.

Android LiveData Internals and a Safe Flow Migration

Explore LiveData lifecycle behavior and stale-event pitfalls, then migrate incrementally to StateFlow and SharedFlow.

Deploying ExecuTorch Models on Android

A practical ExecuTorch path from native PyTorch export to `.pte` deployment on Android, including AOT delegates and runtime trade-offs.
View All Posts