首页 Android-21 Android SDK platforms 21(Android5.0)

Android-21 Android SDK platforms 21(Android5.0)

上传者： wudashuo | 上传时间： 2019-12-21 21:57:22 | 文件大小： 64.01MB | 文件类型： zip
**Android-21 Android SDK Platforms 21 (Android 5.0) 知识点详解** Android 5.0（代号Lollipop）是Google在2014年推出的一个重大更新，它对Android系统进行了许多重要的改进和优化，不仅提升了用户体验，也增强了开发者的工作效率。Android SDK Platforms 21包含了开发Android 5.0应用所需的所有工具和库，是Android开发者不可或缺的部分。 1. **Material Design**：Android 5.0引入了全新的设计语言——Material Design。这种设计风格强调层次感、动态反馈和真实感，提供了统一的视觉语言，使应用看起来更加现代且富有交互性。开发者可以利用Android SDK中的Material Design组件和资源来构建符合这一设计规范的应用界面。 2. **ART运行时**：在Android 5.0之前，Dalvik虚拟机是默认的运行环境。Android 5.0开始，Android运行时（ART）取代了Dalvik，引入了预编译技术，使得应用的启动速度和运行性能得到显著提升。开发者需要确保他们的代码兼容ART环境。 3. **64位支持**：Android 5.0开始支持64位处理器，提供了64位版本的系统镜像和API，允许开发者创建64位应用以充分利用硬件性能。 4. **多用户支持**：Android 5.0扩展了多用户功能，允许在同一设备上创建多个用户空间，每个用户都有自己独立的桌面、应用和数据，这对于家庭和企业环境尤为实用。 5. **通知栏改进**：通知栏进行了重新设计，支持更丰富的通知样式，如 heads-up 通知，可以在不打断当前任务的情况下显示重要信息。开发者可以利用新的Notification API创建更直观、更具吸引力的通知。 6. **Power Management**：Android 5.0引入了更好的电源管理机制，如Doze模式，可以智能地管理设备的休眠状态，从而延长电池寿命。开发者需要关注电池使用情况，优化应用的后台行为。 7. **JobScheduler**：这是一个新的系统服务，允许开发者安排应用在特定时间或网络条件执行任务，提高了效率并减少了不必要的唤醒。 8. **OpenGL ES 3.1**：Android 5.0支持最新的OpenGL ES 3.1图形标准，提供了更强的图形处理能力，支持计算着色器等高级特性，为游戏和图形密集型应用提供了更好的基础。 9. **Android Studio集成**：随着Android Studio成为官方推荐的IDE，Android SDK Platforms 21的使用更加方便。Android Studio提供了丰富的调试工具、自动代码补全、布局预览等功能，极大地简化了开发流程。 10. **Android Wear和Android TV支持**：Android 5.0还扩展到Android Wear智能手表和Android TV设备，为这些新平台提供了SDK支持，开发者可以为这些新领域开发应用。 Android SDK Platforms 21是开发者进入Android 5.0世界的关键，通过使用说明.txt文件，开发者可以了解如何安装和配置这个平台，以便在Android Studio中进行项目开发。同时，android-21文件夹中包含了所有必要的SDK组件，使得开发者能够创建和测试针对Android 5.0的应用程序。

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评论信息

  • chaojennifer :
    不是我想要的sdk
    2019-06-24
  • xing393939 :
    谢谢楼主分享
    2019-06-07
  • wudilingyun :
    使用这个eclipse编译一直不过。开始以为as的不能在eclipse上用，后来自己用as下载21，copy到eclipse就可以。。。
    2018-12-20
  • yqh2009 :
    谢谢楼主分享
    2018-08-17

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