android学习资料。非常不错,很清晰,而且类容比较全。学习完这个资料就基本能开发任何android的东西了。 全英文版本,很实用。 This book is for anyone interested in creating applications for the Android mobile phone platform using the SDK. It includes information that will be valuable, whether you’re an experienced mobile developer or you’re making your first foray, via Android, into writing mobile applications. It will help if readers have used mobile phones (particularly phones running Android), but it’s not necessary, nor is prior experience in mobile phone development. It’s expecte d that you’ll have some experience in software development and be familiar with basic development practices.While knowledge of Java is helpful, it’s not a necessity.