Reto Meier 目前是Google Android 团队的一名Android 开发人员倡导者，帮助Android 开发人员创建最优秀的应用程序。Reto 是一位经验丰富的软件开发人员，拥有逾10 年的GUI 应用程序开发经验。进入Google 之前，他曾在多种行业中工作过，包括海洋石油、天然气以及金融业。

Reto 始终不渝地追求掌握新技术，从2007 年Android 发布之初Reto 就迷恋上了此项技术。在Reto 的个人网站Radioactive Yak(http://blog. radioactiveyak.com) 上可以了解Reto 的兴趣和爱好。他还在Google+(http://profiles.google.com/reto.meier) 和Twitter(www.twitter.com/retomeier) 上分享各种信息。

技术编辑简介

Dan Ulery 是一名软件工程师，具有.NET、Java 和PHP 的开发经验，并且十分熟悉软件部署。他毕业于爱达荷大学，获得了计算机科学学士学位，并且辅修了数学专业。

Developers, build mobile Android apps using Android 4 The fast-growing popularity of Android smartphones and tablets creates a huge opportunities for developers. If you're an experienced developer, you can start creating robust mobile Android apps right away with this professional guide to Android 4 application development. Written by one of Google's lead Android developer advocates, this practical book walks you through a series of hands-on projects that illustrate the features of the Android SDK. That includes all the new APIs introduced in Android 3 and 4, including building for tablets, using the Action Bar, Wi-Fi Direct, NFC Beam, and more. Shows experienced developers how to create mobile applications for Android smartphones and tablets Revised and expanded to cover all the Android SDK releases including Android 4.0 (Ice Cream Sandwich), including all updated APIs, and the latest changes to the Android platform. Explains new and enhanced features such as drag and drop, fragments, the action bar, enhanced multitouch support, new environmental sensor support, major improvements to the animation framework, and a range of new communications techniques including NFC and Wi-Fi direct. Provides practical guidance on publishing and marketing your applications, best practices for user experience, and more This book helps you learn to master the design, lifecycle, and UI of an Android app through practical exercises, which you can then use as a basis for developing your own Android apps.