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<!DOCTYPE HTML>
<html lang="en-US" manifest="./manifest.appcache">
<head>
<meta charset="UTF-8">
<title>Android性能优化 | Google Android官方培训课程中文版</title>
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<a href="https://github.com/kesenhoo/android-training-course-in-chinese/issues" target="blank"class="issues-link">Questions and Issues</a>
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<i class="fa fa-check"></i> <b>1.</b> 序言
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<li class="chapter " data-level="2" data-path="basics/index.html">
<a href="./basics/index.html">
<i class="fa fa-check"></i> <b>2.</b> Android入门基础：从这里开始
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<a href="./basics/firstapp/index.html">
<i class="fa fa-check"></i> <b>2.1.</b> 建立第一个App
</a>
<ul class="articles">
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<a href="./basics/firstapp/creating-project.html">
<i class="fa fa-check"></i> <b>2.1.1.</b> 创建Android项目
</a>
</li>
<li class="chapter " data-level="2.1.2" data-path="basics/firstapp/running-app.html">
<a href="./basics/firstapp/running-app.html">
<i class="fa fa-check"></i> <b>2.1.2.</b> 执行Android程序
</a>
</li>
<li class="chapter " data-level="2.1.3" data-path="basics/firstapp/building-ui.html">
<a href="./basics/firstapp/building-ui.html">
<i class="fa fa-check"></i> <b>2.1.3.</b> 建立简单的用户界面
</a>
</li>
<li class="chapter " data-level="2.1.4" data-path="basics/firstapp/starting-activity.html">
<a href="./basics/firstapp/starting-activity.html">
<i class="fa fa-check"></i> <b>2.1.4.</b> 启动其他Activity
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="2.2" data-path="basics/actionbar/index.html">
<a href="./basics/actionbar/index.html">
<i class="fa fa-check"></i> <b>2.2.</b> 添加ActionBar
</a>
<ul class="articles">
<li class="chapter " data-level="2.2.1" data-path="basics/actionbar/setting-up.html">
<a href="./basics/actionbar/setting-up.html">
<i class="fa fa-check"></i> <b>2.2.1.</b> 建立ActionBar
</a>
</li>
<li class="chapter " data-level="2.2.2" data-path="basics/actionbar/adding-buttons.html">
<a href="./basics/actionbar/adding-buttons.html">
<i class="fa fa-check"></i> <b>2.2.2.</b> 添加Action按钮
</a>
</li>
<li class="chapter " data-level="2.2.3" data-path="basics/actionbar/styling.html">
<a href="./basics/actionbar/styling.html">
<i class="fa fa-check"></i> <b>2.2.3.</b> ActionBar的风格化
</a>
</li>
<li class="chapter " data-level="2.2.4" data-path="basics/actionbar/overlaying.html">
<a href="./basics/actionbar/overlaying.html">
<i class="fa fa-check"></i> <b>2.2.4.</b> ActionBar的覆盖层叠
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="2.3" data-path="basics/supporting-devices/index.html">
<a href="./basics/supporting-devices/index.html">
<i class="fa fa-check"></i> <b>2.3.</b> 兼容不同的设备
</a>
<ul class="articles">
<li class="chapter " data-level="2.3.1" data-path="basics/supporting-devices/languages.html">
<a href="./basics/supporting-devices/languages.html">
<i class="fa fa-check"></i> <b>2.3.1.</b> 适配不同的语言
</a>
</li>
<li class="chapter " data-level="2.3.2" data-path="basics/supporting-devices/screens.html">
<a href="./basics/supporting-devices/screens.html">
<i class="fa fa-check"></i> <b>2.3.2.</b> 适配不同的屏幕
</a>
</li>
<li class="chapter " data-level="2.3.3" data-path="basics/supporting-devices/platforms.html">
<a href="./basics/supporting-devices/platforms.html">
<i class="fa fa-check"></i> <b>2.3.3.</b> 适配不同的系统版本
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="2.4" data-path="basics/activity-lifecycle/index.html">
<a href="./basics/activity-lifecycle/index.html">
<i class="fa fa-check"></i> <b>2.4.</b> 管理Activity的生命周期
</a>
<ul class="articles">
<li class="chapter " data-level="2.4.1" data-path="basics/activity-lifecycle/starting.html">
<a href="./basics/activity-lifecycle/starting.html">
<i class="fa fa-check"></i> <b>2.4.1.</b> 启动与销毁Activity
</a>
</li>
<li class="chapter " data-level="2.4.2" data-path="basics/activity-lifecycle/pausing.html">
<a href="./basics/activity-lifecycle/pausing.html">
<i class="fa fa-check"></i> <b>2.4.2.</b> 暂停与恢复Activity
</a>
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<li class="chapter " data-level="2.4.3" data-path="basics/activity-lifecycle/stopping.html">
<a href="./basics/activity-lifecycle/stopping.html">
<i class="fa fa-check"></i> <b>2.4.3.</b> 停止与重启Activity
</a>
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<li class="chapter " data-level="2.4.4" data-path="basics/activity-lifecycle/recreating.html">
<a href="./basics/activity-lifecycle/recreating.html">
<i class="fa fa-check"></i> <b>2.4.4.</b> 重新创建Activity
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<li class="chapter " data-level="2.5" data-path="basics/fragments/index.html">
<a href="./basics/fragments/index.html">
<i class="fa fa-check"></i> <b>2.5.</b> 使用Fragment建立动态的UI
</a>
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<li class="chapter " data-level="2.5.1" data-path="basics/fragments/creating.html">
<a href="./basics/fragments/creating.html">
<i class="fa fa-check"></i> <b>2.5.1.</b> 创建一个Fragment
</a>
</li>
<li class="chapter " data-level="2.5.2" data-path="basics/fragments/fragment-ui.html">
<a href="./basics/fragments/fragment-ui.html">
<i class="fa fa-check"></i> <b>2.5.2.</b> 建立灵活动态的UI
</a>
</li>
<li class="chapter " data-level="2.5.3" data-path="basics/fragments/communicating.html">
<a href="./basics/fragments/communicating.html">
<i class="fa fa-check"></i> <b>2.5.3.</b> Fragments之间的交互
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="2.6" data-path="basics/data-storage/index.html">
<a href="./basics/data-storage/index.html">
<i class="fa fa-check"></i> <b>2.6.</b> 数据保存
</a>
<ul class="articles">
<li class="chapter " data-level="2.6.1" data-path="basics/data-storage/shared-preference.html">
<a href="./basics/data-storage/shared-preference.html">
<i class="fa fa-check"></i> <b>2.6.1.</b> 保存到Preference
</a>
</li>
<li class="chapter " data-level="2.6.2" data-path="basics/data-storage/files.html">
<a href="./basics/data-storage/files.html">
<i class="fa fa-check"></i> <b>2.6.2.</b> 保存到文件
</a>
</li>
<li class="chapter " data-level="2.6.3" data-path="basics/data-storage/database.html">
<a href="./basics/data-storage/database.html">
<i class="fa fa-check"></i> <b>2.6.3.</b> 保存到数据库
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="2.7" data-path="basics/intents/index.html">
<a href="./basics/intents/index.html">
<i class="fa fa-check"></i> <b>2.7.</b> 与其他应用的交互
</a>
<ul class="articles">
<li class="chapter " data-level="2.7.1" data-path="basics/intents/sending.html">
<a href="./basics/intents/sending.html">
<i class="fa fa-check"></i> <b>2.7.1.</b> Intent的发送
</a>
</li>
<li class="chapter " data-level="2.7.2" data-path="basics/intents/result.html">
<a href="./basics/intents/result.html">
<i class="fa fa-check"></i> <b>2.7.2.</b> 接收Activity返回的结果
</a>
</li>
<li class="chapter " data-level="2.7.3" data-path="basics/intents/filters.html">
<a href="./basics/intents/filters.html">
<i class="fa fa-check"></i> <b>2.7.3.</b> Intent过滤
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="3" data-path="building-content-sharing.html">
<a href="./building-content-sharing.html">
<i class="fa fa-check"></i> <b>3.</b> Android分享操作
</a>
<ul class="articles">
<li class="chapter " data-level="3.1" data-path="content-sharing/sharing/index.html">
<a href="./content-sharing/sharing/index.html">
<i class="fa fa-check"></i> <b>3.1.</b> 分享简单的数据
</a>
<ul class="articles">
<li class="chapter " data-level="3.1.1" data-path="content-sharing/sharing/send.html">
<a href="./content-sharing/sharing/send.html">
<i class="fa fa-check"></i> <b>3.1.1.</b> 给其他App发送简单的数据
</a>
</li>
<li class="chapter " data-level="3.1.2" data-path="content-sharing/sharing/receive.html">
<a href="./content-sharing/sharing/receive.html">
<i class="fa fa-check"></i> <b>3.1.2.</b> 接收从其他App返回的数据
</a>
</li>
<li class="chapter " data-level="3.1.3" data-path="content-sharing/sharing/shareaction.html">
<a href="./content-sharing/sharing/shareaction.html">
<i class="fa fa-check"></i> <b>3.1.3.</b> 给ActionBar增加分享功能
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="3.2" data-path="content-sharing/secure-file-sharing/index.html">
<a href="./content-sharing/secure-file-sharing/index.html">
<i class="fa fa-check"></i> <b>3.2.</b> 分享文件
</a>
<ul class="articles">
<li class="chapter " data-level="3.2.1" data-path="content-sharing/secure-file-sharing/setup-sharing.html">
<a href="./content-sharing/secure-file-sharing/setup-sharing.html">
<i class="fa fa-check"></i> <b>3.2.1.</b> 建立文件分享
</a>
</li>
<li class="chapter " data-level="3.2.2" data-path="content-sharing/secure-file-sharing/sharing-file.html">
<a href="./content-sharing/secure-file-sharing/sharing-file.html">
<i class="fa fa-check"></i> <b>3.2.2.</b> 分享文件
</a>
</li>
<li class="chapter " data-level="3.2.3" data-path="content-sharing/secure-file-sharing/request-file.html">
<a href="./content-sharing/secure-file-sharing/request-file.html">
<i class="fa fa-check"></i> <b>3.2.3.</b> 请求分享一个文件
</a>
</li>
<li class="chapter " data-level="3.2.4" data-path="content-sharing/secure-file-sharing/retrieve-info.html">
<a href="./content-sharing/secure-file-sharing/retrieve-info.html">
<i class="fa fa-check"></i> <b>3.2.4.</b> 获取文件信息
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="3.3" data-path="content-sharing/beam-files/index.html">
<a href="./content-sharing/beam-files/index.html">
<i class="fa fa-check"></i> <b>3.3.</b> 使用NFC分享文件
</a>
<ul class="articles">
<li class="chapter " data-level="3.3.1" data-path="content-sharing/beam-files/sending-files.html">
<a href="./content-sharing/beam-files/sending-files.html">
<i class="fa fa-check"></i> <b>3.3.1.</b> 发送文件给其他设备
</a>
</li>
<li class="chapter " data-level="3.3.2" data-path="content-sharing/beam-files/receive-files.html">
<a href="./content-sharing/beam-files/receive-files.html">
<i class="fa fa-check"></i> <b>3.3.2.</b> 接收其他设备的文件
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="4" data-path="building-multimedia.html">
<a href="./building-multimedia.html">
<i class="fa fa-check"></i> <b>4.</b> Android多媒体
</a>
<ul class="articles">
<li class="chapter " data-level="4.1" data-path="multimedia/audio/index.html">
<a href="./multimedia/audio/index.html">
<i class="fa fa-check"></i> <b>4.1.</b> 管理音频播放
</a>
<ul class="articles">
<li class="chapter " data-level="4.1.1" data-path="multimedia/audio/volume-playback.html">
<a href="./multimedia/audio/volume-playback.html">
<i class="fa fa-check"></i> <b>4.1.1.</b> 控制音量与音频播放
</a>
</li>
<li class="chapter " data-level="4.1.2" data-path="multimedia/audio/audio-focus.html">
<a href="./multimedia/audio/audio-focus.html">
<i class="fa fa-check"></i> <b>4.1.2.</b> 管理音频焦点
</a>
</li>
<li class="chapter " data-level="4.1.3" data-path="multimedia/audio/volume-playback.html">
<a href="./multimedia/audio/volume-playback.html">
<i class="fa fa-check"></i> <b>4.1.3.</b> 控制你得应用的音量与播放
</a>
</li>
<li class="chapter " data-level="4.1.4" data-path="multimedia/audio/audio-output.html">
<a href="./multimedia/audio/audio-output.html">
<i class="fa fa-check"></i> <b>4.1.4.</b> 兼容音频输出设备
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="4.2" data-path="multimedia/camera/index.html">
<a href="./multimedia/camera/index.html">
<i class="fa fa-check"></i> <b>4.2.</b> 拍照
</a>
<ul class="articles">
<li class="chapter " data-level="4.2.1" data-path="multimedia/camera/photobasic.html">
<a href="./multimedia/camera/photobasic.html">
<i class="fa fa-check"></i> <b>4.2.1.</b> 简单的拍照
</a>
</li>
<li class="chapter " data-level="4.2.2" data-path="multimedia/camera/videobasic.html">
<a href="./multimedia/camera/videobasic.html">
<i class="fa fa-check"></i> <b>4.2.2.</b> 简单的录像
</a>
</li>
<li class="chapter " data-level="4.2.3" data-path="multimedia/camera/cameradirect.html">
<a href="./multimedia/camera/cameradirect.html">
<i class="fa fa-check"></i> <b>4.2.3.</b> 控制相机硬件
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="4.3" data-path="multimedia/printing/index.html">
<a href="./multimedia/printing/index.html">
<i class="fa fa-check"></i> <b>4.3.</b> 打印
</a>
<ul class="articles">
<li class="chapter " data-level="4.3.1" data-path="multimedia/printing/photos.html">
<a href="./multimedia/printing/photos.html">
<i class="fa fa-check"></i> <b>4.3.1.</b> 打印照片
</a>
</li>
<li class="chapter " data-level="4.3.2" data-path="multimedia/printing/html-docs.html">
<a href="./multimedia/printing/html-docs.html">
<i class="fa fa-check"></i> <b>4.3.2.</b> 打印HTML文档
</a>
</li>
<li class="chapter " data-level="4.3.3" data-path="multimedia/printing/custom-docs.html">
<a href="./multimedia/printing/custom-docs.html">
<i class="fa fa-check"></i> <b>4.3.3.</b> 打印自定义文档
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="5" data-path="building-graphics.html">
<a href="./building-graphics.html">
<i class="fa fa-check"></i> <b>5.</b> Android图像与动画
</a>
<ul class="articles">
<li class="chapter " data-level="5.1" data-path="graphics/displaying-bitmaps/index.html">
<a href="./graphics/displaying-bitmaps/index.html">
<i class="fa fa-check"></i> <b>5.1.</b> 高效显示Bitmap
</a>
<ul class="articles">
<li class="chapter " data-level="5.1.1" data-path="graphics/displaying-bitmaps/load-bitmap.html">
<a href="./graphics/displaying-bitmaps/load-bitmap.html">
<i class="fa fa-check"></i> <b>5.1.1.</b> 高效加载大图
</a>
</li>
<li class="chapter " data-level="5.1.2" data-path="graphics/displaying-bitmaps/process-bitmap.html">
<a href="./graphics/displaying-bitmaps/process-bitmap.html">
<i class="fa fa-check"></i> <b>5.1.2.</b> 非UI线程处理Bitmap
</a>
</li>
<li class="chapter " data-level="5.1.3" data-path="graphics/displaying-bitmaps/cache-bitmap.html">
<a href="./graphics/displaying-bitmaps/cache-bitmap.html">
<i class="fa fa-check"></i> <b>5.1.3.</b> 缓存Bitmap
</a>
</li>
<li class="chapter " data-level="5.1.4" data-path="graphics/displaying-bitmaps/manage-bitmap-memory.html">
<a href="./graphics/displaying-bitmaps/manage-bitmap-memory.html">
<i class="fa fa-check"></i> <b>5.1.4.</b> 管理Bitmap的内存占用
</a>
</li>
<li class="chapter " data-level="5.1.5" data-path="graphics/displaying-bitmaps/display-bitmap.html">
<a href="./graphics/displaying-bitmaps/display-bitmap.html">
<i class="fa fa-check"></i> <b>5.1.5.</b> 在UI上显示Bitmap
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.2" data-path="graphics/opengl/index.html">
<a href="./graphics/opengl/index.html">
<i class="fa fa-check"></i> <b>5.2.</b> 使用OpenGL ES显示图像
</a>
<ul class="articles">
<li class="chapter " data-level="5.2.1" data-path="graphics/opengl/environment.html">
<a href="./graphics/opengl/environment.html">
<i class="fa fa-check"></i> <b>5.2.1.</b> 建立OpenGL ES的环境
</a>
</li>
<li class="chapter " data-level="5.2.2" data-path="graphics/opengl/shapes.html">
<a href="./graphics/opengl/shapes.html">
<i class="fa fa-check"></i> <b>5.2.2.</b> 定义Shapes
</a>
</li>
<li class="chapter " data-level="5.2.3" data-path="graphics/opengl/draw.html">
<a href="./graphics/opengl/draw.html">
<i class="fa fa-check"></i> <b>5.2.3.</b> 绘制Shapes
</a>
</li>
<li class="chapter " data-level="5.2.4" data-path="graphics/opengl/projection.html">
<a href="./graphics/opengl/projection.html">
<i class="fa fa-check"></i> <b>5.2.4.</b> 运用投影与相机视图
</a>
</li>
<li class="chapter " data-level="5.2.5" data-path="graphics/opengl/motion.html">
<a href="./graphics/opengl/motion.html">
<i class="fa fa-check"></i> <b>5.2.5.</b> 添加移动
</a>
</li>
<li class="chapter " data-level="5.2.6" data-path="graphics/opengl/touch.html">
<a href="./graphics/opengl/touch.html">
<i class="fa fa-check"></i> <b>5.2.6.</b> 响应触摸事件
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.3" data-path="animations/index.html">
<a href="./animations/index.html">
<i class="fa fa-check"></i> <b>5.3.</b> 添加动画
</a>
<ul class="articles">
<li class="chapter " data-level="5.3.1" data-path="animations/crossfade.html">
<a href="./animations/crossfade.html">
<i class="fa fa-check"></i> <b>5.3.1.</b> View间渐变
</a>
</li>
<li class="chapter " data-level="5.3.2" data-path="animations/screen-slide.html">
<a href="./animations/screen-slide.html">
<i class="fa fa-check"></i> <b>5.3.2.</b> 使用ViewPager实现屏幕滑动
</a>
</li>
<li class="chapter " data-level="5.3.3" data-path="animations/cardflip.html">
<a href="./animations/cardflip.html">
<i class="fa fa-check"></i> <b>5.3.3.</b> 展示卡片翻转动画
</a>
</li>
<li class="chapter " data-level="5.3.4" data-path="animations/zoom.html">
<a href="./animations/zoom.html">
<i class="fa fa-check"></i> <b>5.3.4.</b> 缩放View
</a>
</li>
<li class="chapter " data-level="5.3.5" data-path="animations/layout.html">
<a href="./animations/layout.html">
<i class="fa fa-check"></i> <b>5.3.5.</b> 布局变更动画
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="6" data-path="building-connectivity.html">
<a href="./building-connectivity.html">
<i class="fa fa-check"></i> <b>6.</b> Android网络连接与云服务
</a>
<ul class="articles">
<li class="chapter " data-level="6.1" data-path="connectivity/connect-devices-wireless/index.html">
<a href="./connectivity/connect-devices-wireless/index.html">
<i class="fa fa-check"></i> <b>6.1.</b> 无线连接设备
</a>
<ul class="articles">
<li class="chapter " data-level="6.1.1" data-path="connectivity/connect-devices-wireless/nsd.html">
<a href="./connectivity/connect-devices-wireless/nsd.html">
<i class="fa fa-check"></i> <b>6.1.1.</b> 使得网络服务可发现
</a>