(The most striking thing about the Android platform is the openness of the Android mobile phone system and free services. Android is a platform that is completely open to third-party software, and developers have greater freedom in developing programs for it. I have carefully collected 30 Android development tutorials for you. Preview of partial data titles: a collection of five excellent papers on Android graduation design [free] Android interface effects PdfAndroidAPI Manual CHM (CHM version similar to JAVAAPI) Android Chinese SDK Help Document Android Development Tutorial Notes Full Version Android Program Development Primer Tutorial PDF Technical Document Android Bottom Principle Training Courseware Full Set (within the top 500) AndroidAPI2.1 Chinese Reference Manual Android Software Development and Game Development Series Blog Collection 28 major items and 10 suggestions that Android learning needs to master [800] The most valuable Android development boutique articles in 2012 [800] Android development guide translation version AndroidEclipse Google Android UI Design Skills, a total of five parts PPT14 classic Android development tutorials, free download of Android system principles and development key details [technical documents] Chinese version of Android Development Guide: Using the program framework Android Development from Getting Started to Mastery IBM Official Tutorial Android Application Development Dictionary (ARM11 CD-ROM material) Chinese collection of Android Api (Android Chinese translation group))