The document discusses key concepts for developing Android apps including menus, layouts, styles, lifecycle management, AsyncTask, and dialogs. It provides an overview of each topic, examples of how to implement them, and links to Android documentation for further information. The presentation includes live demos and assumes a basic understanding of Android, activities, intents, and resources.

1. Getting Dirty With Android

2. Brent EdwardsSenior Consultant with MagenicBrentE@magenic.com@brentledwardsbrentedwards.net

3. What We Will CoverMenusLayoutStylesLifecycle ManagementAsyncTaskAll while building a sample app

4. AssumptionsBasic understanding of…AndroidActivities and IntentsResources

5. Menus

6. Menus3 FlavorsOptions MenuPrimary Menu TypeMenu Button PressedFirst 5-6 Options -> Icon MenuWhen 7+ options, Option 6+ -> Expanded MenuContext MenuLong PressSub Menu

7. MenusDefine menus in XMLres/menu/Inflate the XML resource in code

8. Menus[Demo]

9. Layout

10. LayoutDefines what the UI looks likeWhere views are placedHow big views areHow views flowMade up of nested views

11. Layout2 Ways to define layoutXMLProvides most flexibilityBetter separation of UI from logicEasier to visualizeProgrammaticallyCan be more difficultBest when coupled with XML and LayoutInflater

12. Layout - XMLValid XML fileEach node maps to a view instanceAttributes set properties on the viewLayout File ConventionHave .xml extensionNamed with all lowercasePlaced in res/layout/ folder

13. LayoutMost Useful Layout ObjectsLinearLayoutRelativeLayout

14. Layout - LinearLayoutViews are stacked [horizontally|vertically]

15. Layout - LinearLayoutWhy it is so usefulSimple to useEasy to understand at a glanceCan leverage weight for children to scale proportionally

16. LinearLayout[Demo]

17. Layout - RelativeLayoutViews specify their position relative to parent, other views or both

18. Layout - RelativeLayoutWhy it is so usefulVery versatileScales very wellHandles rotation easily

19. RelativeLayout[Demo]

20. Styles

21. StylesSpecifies look and format for viewsSeparates design from contentCollection of propertiesFont SizeFont ColorBackground ColorPaddingMarginMuch more

22. StylesAdds consistency to UISimilar to CSS

23. StylesStyles file conventionHave .xml extensionstyle.xmlPlaced in res/values/

24. Style[Demo]

25. Lifecycle Management

26. Lifecycle ManagementApplications have a lifecycleEssentially Three StatesActive / RunningPausedStopped

27. Lifecycle Management

28. Lifecycle ManagementStopped Activities can be killedThen recreated when brought to frontActivities with state need to be serializedonPause()onSaveInstanceState()

29. Lifecycle Management[Demo]

30. AsyncTask

31. AsyncTaskTasks run asynchronouslyDoesn’t freeze UIGood for long running tasksWeb requests

32. AsyncTaskDefined by 3 generic typesParamsProgressResult

33. AsyncTask4 StepsonPreExecuteExecutes on UI threaddoInBackgroundExecutes the actual task on background threadonProgressUpdateOptionally updates user on progress on UI threadonPostExecuteExecutes on UI thread

34. AsyncTaskRulesTask must be created in UI threadexecute must be invoked from UI threadTasks can only be executed onceDon’t call onPreExecute, onPostExecute, doInBackground or onProgressUpdate manually

35. AsyncTask[Demo]

36. Dialogs

37. DialogsTypesAlertDialogProgressDialogDatePickerDialogTimePickerDialogOverride Dialog class to create Custom Dialogs

38. DialogsTo show a DialogSimple wayMore complex wayOverride onCreateDialog(int)Call showDialog(int)

39. Dialogs[Demo]

40. Valuable LinksFundamentalshttp://developer.android.com/guide/topics/fundamentals.htmlMenushttp://developer.android.com/guide/topics/ui/menus.htmlLayouthttp://developer.android.com/guide/topics/ui/declaring-layout.htmlStyleshttp://developer.android.com/guide/topics/ui/themes.htmlAsyncTaskhttp://developer.android.com/reference/android/os/AsyncTask.htmlDialogshttp://developer.android.com/guide/topics/ui/dialogs.html

41. Questions?

42. Brent EdwardsSenior Consultant with MagenicBrentE@magenic.com@brentledwardsbrentedwards.net