应用大小与构建优化
通过构建变体、摇树优化、拆分 APK 和延迟加载，减小 Flutter 应用下载大小并加快启动速度。
应用大小与构建优化 是 CoddyKit 上的免费 Flutter Mobile Development 课时。 这是第 4 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Flutter Mobile Development 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Flutter Mobile Development 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Why App Size Matters
Smaller apps install faster, convert better and use less storage. Alongside runtime performance, build optimization is a core part of shipping a polished release.
Measuring the Size
Use the analyze-size flag to see exactly what is in your build.
flutter build apk --analyze-sizeRelease vs Debug
Always measure and ship the release build — debug builds include extra tooling and are far larger.
flutter build appbundle --releaseApp Bundles over APKs
On Android, ship an app bundle (.aab). Google Play then generates per-device APKs, so each user downloads only what they need.
flutter build appbundleSplit per ABI
If distributing APKs directly, split by CPU architecture so each binary holds only one set of native libraries.
flutter build apk --split-per-abiIcon Tree Shaking
Flutter automatically tree shakes Material icons in release builds, keeping only the glyphs you actually use. Avoid building icon data dynamically to keep this working.
Compressing Assets
Optimize images before bundling. Prefer modern formats and appropriate resolutions; do not ship 4K images for thumbnails.
# example using a CLI tool
# cwebp input.png -o output.webpDeferred Components
Deferred loading lets you download rarely-used features on demand instead of at install. Import a library with the deferred as keyword.
import 'package:myapp/premium.dart' deferred as premium;
Future<void> openPremium() async {
await premium.loadLibrary();
premium.showScreen();
}Build Flavors
Flavors let one codebase produce dev, staging and prod builds with different config and app IDs.
flutter build apk --flavor prod -t lib/main_prod.dartObfuscation
Obfuscate Dart code in release to shrink and protect it. Keep the symbol files to de-obfuscate crash reports.
flutter build apk --obfuscate --split-debug-info=build/symbolsRemoving Unused Dependencies
Audit pubspec.yaml regularly. Every unused package adds code and risk. Remove what you no longer call.
flutter pub depsQuick Check
Which build artifact lets Google Play deliver only the code and resources each device needs?
Recap
You learned build optimization:
- Measuring size with analyze-size
- App bundles and split-per-abi
- Tree shaking, asset compression, deferred components
- Flavors and obfuscation
These steps ship a lean, fast-to-install app.
用 AI 导师学习 Dart — 免费
在浏览器中编写并运行真实代码，获得全天候 AI 导师的即时帮助，并在网页或应用中继续学习。
- 课程
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- 课程
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常见问题解答
「应用大小与构建优化」课时是免费的吗？
是的 — 「应用大小与构建优化」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Flutter Mobile Development 课程的其余内容，请升级到 CoddyKit PRO。 Flutter Mobile Development 课程共包含 4 节课。
「应用大小与构建优化」这节课中我会学到什么？
通过构建变体、摇树优化、拆分 APK 和延迟加载，减小 Flutter 应用下载大小并加快启动速度。 你通过在浏览器中直接运行的动手代码来练习 Flutter Mobile Development，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Flutter Mobile Development 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Flutter Mobile Development 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 4 节课，共 4 节。
「应用大小与构建优化」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Flutter Mobile Development 课中编写并运行代码吗？
能。每节 Flutter Mobile Development 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。