每日新聞摘要

Kotlin Weekly #486 (23 November 2025) collects announcements, articles, tooling updates, libraries and community items. Featured announcements include an article offering data-driven arguments to convince management to adopt Kotlin and a roundup of Google Summer of Code 2025 Kotlin projects that improved Gradle tooling, code quality, Firebase AI for KMP, Maven publishing and Jenkins plugins. The articles section lists practical pieces such as Koin IDE Plugin 1.5.1 (adding Koin Annotations 2.2 and JSR-330), a guide to Kotlin’s Plugin Discovery and JVM SPI, bridging Kotlin coroutines with Swift async/await, using Navigation 3 with Compose Multiplatform, and a Retrofit 3.0.0 migration guide. Also noted are new tools like Decoroutinator for coroutine traces, a Pale Blue Spring Admin demo, a sponsored Kotlin Expert workshop, a Now in Android video, and several open-source libraries and components for Kotlin multiplatform development.

Kotlin Weekly 第486期（2025年11月23日）汇总了 Kotlin 社区的公告、文章、工具与开源项目。公告部分推荐了一篇以生产力、代码质量、开发者满意度和明确 ROI 为依据，帮助说服管理层采用 Kotlin 的文章，并展示了 Google Summer of Code 2025 中入选的 Kotlin 项目，涉及 Gradle 工具改进、代码质量、KMP 上的 Firebase AI、Maven 发布和 Jenkins 插件等。文章栏目包括 Koin IDE Plugin 1.5.1（支持 Koin Annotations 2.2 与 JSR-330）、关于 Kotlin Plugin Discovery 的 JVM SPI 教程、将 Kotlin 协程与 Swift async/await 互通的实践、使用 Navigation 3 与 Compose Multiplatform 的示例以及 Retrofit 3.0.0 的迁移指南。期刊还列出了一些开源库、视频与付费工作坊信息。

The author plans a mobile app for competitive programmers that fetches upcoming contests from platforms such as Codeforces, AtCoder, and CodeChef, detects time changes, and automatically reschedules alarms so contests aren’t missed. Core features include automatic contest fetching (via APIs or scraping), detection of schedule changes with cancellation and rescheduling of alarms, customizable alarm offsets (default 30 minutes, options like 15/20/45 or custom), and a loud full‑screen alarm that rings even when the phone is locked or in silent mode. The app should be extensible to additional platforms. The author asks for practical guidance on the best development approach (Kotlin native Android vs Flutter vs React Native), background syncing mechanisms (WorkManager, AlarmManager, foreground services or hybrids), surviving Doze/battery optimizations, and best practices for local storage, update detection, and rescheduling.

作者计划开发一款面向竞赛程序员的手机应用，自动从 Codeforces、AtCoder、CodeChef 等平台获取即将开始的比赛日程，若官方时间变动则检测到后取消旧闹钟并自动重设，以免错过比赛。主要功能包括通过 API 或必要时爬取获得最新赛程、时间变更检测与重排闹钟、可自定义提前提醒（默认 30 分钟，可选 15、20、45 分钟或任意间隔），以及在锁屏或静音状态仍能响起的全屏自定义铃声。作者希望获得关于采用原生 Android（Kotlin）还是 Flutter/React Native、后台同步（WorkManager、AlarmManager、前台服务或混合方案）、以及在 Doze 模式和电池优化下保证闹钟可靠性的架构与数据管理建议。

SteadyFetch is a compact Kotlin-first Android SDK created to reliably download large, sensitive files into an app's internal storage without exposing them to public downloads. The author built it after Android's DownloadManager proved inadequate: it favors public storage, lacks direct streaming to internal directories, has rigid API for chunking and progress, delays start times, and does not support true parallel ranged downloads. SteadyFetch probes the server for size and range support, splits files into byte-range chunks, downloads parts in parallel using OkHttp and coroutines, writes temporary chunk files directly in the chosen directory, and resumes incomplete chunks on restart. Once all chunks finish it merges them atomically into the final file. The library also manages a foreground service and notification, provides a small public API, and targets use cases where privacy, resumability, and control over downloads are required. Repository link is provided.

SteadyFetch 是一个以 Kotlin 为主的小型 Android SDK，专为在应用沙盒内可靠下载大型且敏感的文件而设计，避免将文件写入公共下载目录。作者在发现 Android 的 DownloadManager 对私密存储、分段并行、细粒度進度与立即启动等需求支持不足后，自己实现了下载流程並抽象成此庫。SteadyFetch 會探测服务器是否支持 range，切分文件为多个 byte-range 分段，使用 OkHttp 和协程并行下载到指定的内部目录，重启后扫描并续传未完成的分段，全部完成后再原子合并为目标文件并清理临时分段。库还负责前台服务和通知，接口精简，适用于需要隐私与可续传下载控制的场景。