Google啟動了開放手機平臺Android，并提供了軟件開發包SDK下載。在SDK中有一款制作精良的手機模擬器。Android Emulator是一款功能非常齊全的模擬器，電話本、通話等功能都可正常使用(當然你沒辦法真的從這里打電話)。甚至其內置的瀏覽器和Google Earth/Maps(支持街道實景!)都可以聯網。用戶可以使用鍵盤輸入，鼠標點擊模擬器按鍵輸入，甚至還可以使用鼠標點擊、拖動屏幕進行操縱。

What is Android?
Android is a software stack for mobile devices that includes an operating system, middleware and key applications. This early look at the Android SDK provides the tools and APIs necessary to begin developing applications on the Android platform using the Java programming language.

Features
-Application framework enabling reuse and replacement of components
-Dalvik virtual machine optimized for mobile devices
-Integrated browser based on the open source WebKit engine
-Optimized graphics powered by a custom 2D graphics library; 3D graphics based on the OpenGL ES 1.0 specification (hardware acceleration optional)
-SQLite for structured data storage
-Media support for common audio, video, and still image formats (MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, GIF)
-GSM Telephony (hardware dependent)
-Bluetooth, EDGE, 3G, and WiFi (hardware dependent)
-Camera, GPS, compass, and accelerometer (hardware dependent)
-Rich development environment including a device emulator, tools for debugging, memory and performance profiling, and -a plugin for the Eclipse IDE

官網：http://code.google.com/android/

Download: Android SDK For Windows
Download: Android SDK For Mac OS(僅限Intel架構)
Download: Android SDK For Linux