You can download the Android SDK bundled with eclipse for a windows operating system from here.
Hardware abstraction Layer: display, touch input, network, powerm storage IPC: interprocess communication. shared object life cycle yet another file system block Android java virtual machine: Dalvik on top of the Android kernel JVM compatible bytecode (.class), dalvik executable (.dex) run by Dalvik VM Libraries: C library (libC) freetype (rendering text to bitmap), SQLite (DB) OpenGL(2D/3D rendering using hardware accelation if available), LibWebCore (a WebKit based browser engine which can be embeded as a web view within user interfaces of other applications. it is used in the develpment of the stock android browser) Andoid media libraries Apps framework: view manager: user interfaces, content provider: resources storastio nand sharing notification manager: API NoticficationManager class: place icon on status bar(clickable, register executable actions), turn back light on, vibrate, play sounds LocationManager identify location register location-based triggers that are called in proximity input method service: your own keyboard, any custom buttons, pen inputs, etc. the input is then converted into text and passed to the taget UI elements telephony manager Apps can subscribeto telephony state changes SmsManager Utilities: PhoneNumberUtils, PhonenumberFormattingTextWatcher (format phone numbers from around the world) power manager PowerManager.WakeLock forces devices to remain on. Disable lock as son as possible. by definition everything is powering down to save energy Resource Manager Framework Decouples static resources and device specifics from apps layout, animation, strings, sounds, images, etc. To access resource: <packagename>.R.<resourcetype>.<resourcename> R=Resurcemanagerclass, resourcetype is pre defined text subview, rectangle, subview with text and icons, View class -> ViewGroup class Components Activity(action) Service Content Provider(data) Broadcast Receiver(action) ------------------------------------------------------------------------------------------ intent(interaction among above) Activity class one activity per UI Can call other activity of another app email app asks a pdf viewer app to view a pdf attachment via Intent communication Intent an object: intended request + parameters intent i = new intent(FirstActivity.class, SecondActivity.class); startActivity(i); Explicit intents: run various internal activities whie user is interacting implicit intent: only enough info for system to etermine which component is better to receive th eintent or which activity should be started to receive the intent (requires intent filters) Action: A String naming the action to be performed
Category: A String containing additional info about the kind of comonent thatshoild handle the intent
Parameters (Data): URI of data and MIME type iNTENT Filterwhich implicit intents they can handle, activities, services, broadcast receivers Android system itself utilizes intent filters to Services unlike activities, services are used for background, UI-less task that do not require user interaction service class background mp3 player profiler that tells you which apps are more power hungry similar to activity start service use intents should be declared in the AndroidManifest.xml startService() to start it in your own app bindService() start a service in another app bound services are servers in client-server interaction scenario cpu intevsive mp3 playback, or network block etc. Content Provider sharable content app packages data as content providershare data with other apps via ContentResolver interface e.g. contacts are stored as content providers so taht they are accessible by others broadcastReceiver responding to system wide broadcast announcements devicebattery status, camera just captured an image each broadcast is represented as an intent object , it is an implicit intent ----------------- Dalvik Debug monitor service DDMS graphical information of running threads and calls stack Android debug bridge adb : debug on actual device tethered aconnected by wire or an emulator device | adb | DDMS, eclipse plugin, etc. TraceView tool: graphical iew of app executiin log HierarchyViewer |