Synapseindia android apps application development
- 2. AAnnddrrooiidd BBaassiiccss Credit goes to Google!
- 3. Course Objectives • Mobile Application Development (MAD) • Intro to Android platform • Platform architecture • Application building blocks • Development tools • Textbook: Hello, Android
- 4. Few reasons to go MAD… • Smart Phones – Internet access anywhere – Social networking • Millions of mobile users • Open standards
- 5. Introduction to Android • Open software platform for mobile development • A complete stack – OS, Middleware, Applications • An Open Handset Alliance (OHA) project • Powered by Linux operating system • Fast application development in Java • Open source under the Apache 2 license
- 7. Linux Kernel • Works as a HAL • Device drivers • Memory management • Process management • Networking
- 8. Libraries • C/C++ libraries • Interface through Java • Surface manager – Handling UI Windows • 2D and 3D graphics • Media codecs, SQLite, Browser engine
- 9. Android Runtime • Dalvik VM – Dex files – Compact and efficient than class files – Limited memory and battery power • Core Libraries – Java 5 Std edition – Collections, I/O etc…
- 10. Application Framework • API interface • Activity manager – manages application life cycle.
- 11. Applications • Built in and user apps • Can replace built in apps
- 12. Course Objectives • Mobile Application Development (MAD) • Intro to Android platform • Platform architecture • Application building blocks • Development tools • Textbook: Hello, Android
- 13. Application Building Blocks • Activity • IntentReceiver • Service • ContentProvider
- 14. Activities • Typically correspond to one UI screen • But, they can: – Be faceless – Be in a floating window – Return a value
- 15. IntentReceivers • Components that respond to broadcast ‘Intents’ • Way to respond to external notification or alarms • Apps can invent and broadcast their own Intent
- 16. Intents • Think of Intents as a verb and object; a description of what you want done – E.g. VIEW, CALL, PLAY etc.. • System matches Intent with Activity that can best provide the service • Activities and IntentReceivers describe what Intents they can service
- 17. Intents Home Contacts GMail Chat Blogger System picks best component for that action “Pick photo” Client component makes a request for a specific action New components can use existing functionality Blogger Photo Gallery
- 18. Services • Faceless components that run in the background – E.g. music player, network download etc…
- 19. ContentProviders • Enables sharing of data across applications – E.g. address book, photo gallery • Provides uniform APIs for: – querying – delete, update and insert. • Content is represented by URI and MIME type
- 20. Course Objectives • Mobile Application Development (MAD) • Intro to Android platform • Platform architecture • Application building blocks • Development tools • Textbook: Hello, Android
- 21. Development Tools • Eclipse • Android SDK 2.0 or higher developer.android.com
- 22. The Emulator • QEMU-based ARM emulator • Runs the same image as the device • Limitations: – No Camera support
- 23. Devices
- 24. Hello World • A great starting point: http://developer.android.com/guide/tutorial s/hello-world.html • Generating UIs – Views – building blocks – E.g. TextView, EditText, Button – Placed into Layouts – E.g. LinearLayout, TableLayout, AbsoluteLayout
- 25. Application Lifecycle • Application run in their own processes (VM, PID) • Processes are started and stopped as needed to run an application's components • Processes may be killed to reclaim resources
- 27. Lifecycle • System Process Home Contacts GMail • Home • Mail • Browser • Map
- 28. Location Manager
- 29. XMPP Services • Allows any app to send device-to-device messages to other android users • Data Messages are Intents with name/value pairs • Works with any gmail account… • Can also build servers to deliver server-to-device messages
- 31. Notification Manager • How background app interact with users • Consistent notification presentation
- 32. Views
- 33. Views
- 34. Location Manager
- 35. End of Lecture • First task, install the SDK and Eclipse for instructions detailed in Assignment #1 • Will be performed in class as well.