Android Weekly Issue 2025-08

Reading Notes Android Jank ANR Java Linux

Word count: 867Reading time: 5 min

 2025/02/23

Android Weekly is a weekly newsletter focused on the Android technical ecosystem, updated every Monday. This newsletter delves into high-quality technical content in areas such as Android system architecture, performance optimization, cross-platform development, and AI, providing continuous knowledge updates and technical insights for developers.

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Technical Articles

Android Fence Synchronization Framework: This article introduces Android’s Fence sync framework, which ensures image buffer alignment in the graphics pipeline. It covers the Fence class, FenceMonitor for tracing, and provides a high-level overview of the synchronization flow, primarily focusing on user-space implementations.
Do You Really Know Why Heavy Operations in onCreate and onResume Don’t Always Cause ANRs?: Based on course principles, this article analyzes specific scenarios during Activity lifecycle methods where heavy operations might not trigger an ANR immediately.
How Google Gemini Accelerates Android Development: Exploring Gemini integration in Android Studio, covering smart diagnostics and code improvement cases. It also notes that while helpful, AI still struggles with high-level programming tasks and requires human verification.
Flutter Progress: New HCPP PlatformView Implementation and the Android Technical Secrets: Exploring the evolution of Flutter’s PlatformView modes on Android, specifically the new HCPP (High-level Composition) mode. It uses SurfaceControl to create high-layer Surfaces to solve overlapping issues, currently in beta.
Deep Blue Insight: The Stealthiest Hidden Hand of 2024: Disclosing an OEM’s practice of using system privileges to inject ads into third-party apps without user consent, generating millions in revenue while ruining the user experience.
Deep Blue Insight: The Most “Unpardonable” Vulnerability of 2022: Analyzing how a major internet firm exploited OEM-specific vulnerabilities in its public app to attack mainstream mobile systems.
Case Study: Pending Exceptions Preventing Java Function Execution in Threads: Analyzing a rare Android issue where a pending exception in a thread prevented the JNI layer from executing calling Java functions.
Exploring JNI (Part 4): Reference Types: Reading notes on JNI reference types: Local, Global, and Weak Global. It details their lifecycles, threading rules, and compares them with Java’s internal reference types (Strong, Soft, Weak, Phantom).
Huawei - Performance Experience Design: Improving perceived fluency through interaction and visual design, covering gesture recognition, animation optimization, and latency metrics.
Huawei - Performance Best Practices Guide: A full lifecycle approach to performance tuning in HarmonyOS, from design guides to profiling tools.
System Development Tip: How to Check if a Process is Frozen: Understanding task freezing mechanisms and how to verify if a process is under a “controlled” pause state.
Exploring ARM Unwind Tech on Android Part 5: Asynchronous Unwind: Analyzing how simpleperf and traced_perf use asynchronous offline unwinding via external threads to minimize impact on the target process.
Android V (15) SkSurface_Ganesh Summary: Comparing GL and Vulkan backends for Skia’s GPU surfaces. Vulkan backends can consume significantly more GPU memory (10-20MB) because instances are held rather than released per frame.
The Science of Response Latency: Perceived Minimum Tangible Delay (PAMTD) for direct dragging is around 11ms, while clicking is 69ms. Users are much more sensitive to drag latency improvements.
Energy-Aware Scheduling (EAS) Archaeology Series (7, 8, 9): Deep dive into the patches that introduced Energy Models to sysfs, Performance Domains (PD) to the scheduler, and asymmetric CPU capacity flags.
Google I/O 2025 Registration Starts Soon: Join on May 20-21 for the latest on AI and Android.
UprobeStats: Dynamic Instrumentation in Android 15: Google introduces UprobeStats using eBPF uprobes to dynamically gather analytics without hardcoding.
SystemServer Process Startup Flow Analysis: Chronicling how Zygote forks the SystemServer to initiate core Android services.
Beyond Code & Engineering (2): CRUD to Business Leverage: Moving past high-tech worship to understand technical essence and business value seeking.
React Native: From View Creation to Layout Rendering: Analyzing the mapping between tags and ShadowNodes, and how the Yoga engine manages layouts.
Unlocking CameraX in Jetpack Compose: Introducing viewfinder-compose and camera-compose alpha artifacts for more idiomatic camera integration.
Systematic Mastering of Image in Flutter: Coverage on caching, compression, and high-availability image processing.
Compose Performance: Methods to reduce unnecessary recomposition using Strong Skipping and stability markers.