<ul><li>Proper encapsulation and reuse of utility classes are crucial in HarmonyOS app development for improving efficiency and code robustness.</li><li>Commonly used utility tools in projects include permission management, logging, window and screen management, system API encapsulation, date formatting, and audio processing.</li><li>Recommendations include using @kit.AbilityKit for permission management, @ohos.hilog for logging, and WindowUtil for window and screen management in HarmonyOS.</li><li>Utility classes should follow single responsibility principle, have simple interfaces, and developers should refer to Official Documentation and ArkTS Coding Style Guide for best practices.</li></ul>

Part 8: Common Utility Tools (Part 2)

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