Android application development: a crash course

An Android basics session at Droidcon 2012

Transcript

1. ANDROID APP DEV CRASH COURSE SOHAM MONDAL Soham  Mondal  
2. Soham  Mondal   WWW .BLRDROID.ORG
3. WHY ANDROID? SOME GLOBAL NUMBERS Soham  Mondal  
4. 500,000,000 ANDROID  DEVICES  GLOBALLY   h8p://ar=cles.=mesofindia.india=mes.com/2012-­‐06-­‐28/telecom/32456734_1_android-­‐devices-­‐hugo-­‐barra-­‐smartphone-­‐market   Soham  Mondal  
5. 1,000,000+   ANDROID  HANDSET  ACTIVATIONS  PER  DAY   h8p://ar=cles.=mesofindia.india=mes.com/2012-­‐06-­‐28/telecom/32456734_1_android-­‐devices-­‐hugo-­‐barra-­‐smartphone-­‐market   Soham  Mondal  
6. Soham  Mondal   ANDROID ON GOOGLE TV The  same  android  codebase  can  run  on  android  phones,   android  tablets  and  now  even  on  televisions  running   Google  TV  
7. SOME MORE HIGHLIGHTS New Cameras from Nikon and Sasmung expected to run Android, to make “intelligent” devices Android have been deployed on intelligent kiosks, cars and even household electronics devices Asus Nexus 7 tablet launched at $199 running Android 4.1 More Nexus devices expected from multiple manufacturers in October Soham  Mondal  
8. ANDROID APP BUILDING BLOCKS Soham  Mondal  
9. ANDROID BUILDING BLOCKS Ac=vi=es   Android  manifest.xml   Intents   Views   Content  providers   Services   No=fica=ons   Soham  Mondal  
10. ANDROID BUILDING BLOCKS Android  manifest.xml   Intents   Views   Content  providers   Services   No=fica=ons   Ac=vi=es   Soham  Mondal  
11. ACTIVITIES •  Provides a screen with which users can interact in order to do something Example: dial the phone, take a photo, send an email, or view a map. •  Each activity is given a window in which to draw its user interface. •  An app usually consists of multiple activities •  Typically, one activity in an application is specified as the "main" activity, which is presented to the user when launching the application for the first time. Soham  Mondal  
12. ANDROID BUILDING BLOCKS Ac=vi=es   Android  manifest.xml   Intents   Views   Content  providers   Services   No=fica=ons   Soham  Mondal  
13. Ac=vi=es   ANDROID BUILDING BLOCKS Android  manifest.xml   Views   Content  providers   Services   No=fica=ons   Intents   Soham  Mondal  
14. INTENTS •  Intents are used to move from Activity to Activity •  describes what the application wants •  provides late runtime binding Soham  Mondal  
15. INTENT INTENT ACTIVITY  1   ACTIVITY  2   ACTIVITY  3   Soham  Mondal  
16. ANDROID BUILDING BLOCKS Ac=vi=es   Android  manifest.xml   Intents   Views   Content  providers   Services   No=fica=ons   Soham  Mondal  
17. Ac=vi=es   ANDROID BUILDING BLOCKS Android  manifest.xml   Intents   Content  providers   Services   No=fica=ons   Views   Soham  Mondal  
18. VIEWS •  Views are UI basic building blocks •  Know how to draw themselves •  Respond to events •  Organized as trees to build up GUIs •  Described in XML in layout resources Soham  Mondal  
19. UI ELEMENTS Ac=on  Bar:  made  of  a   couple  of  ImageViews   Soham  Mondal  
20. UI ELEMENTS Individual  elements   ImageView   TextView   TextView   Soham  Mondal  
21. ANDROID BUILDING BLOCKS Ac=vi=es   Android  manifest.xml   Intents   Views   Content  providers   Services   No=fica=ons   Soham  Mondal  
22. Ac=vi=es   ANDROID BUILDING BLOCKS Android  manifest.xml   Intents   Views   Services   No=fica=ons   Content  providers   Soham  Mondal  
23. CONTENT PROVIDERS •  Enable applications to store and share data. •  Makes a specific set of the application's data available to other applications. •  Date stored in the file system, in an SQLite database or on other platforms Soham  Mondal  
24. File   Ac=vity  1.1   Ac=vity  1.2   Ac=vity  2.1   Ac=vity  2.2   Applica'on  2   (wants  phone  number)   Applica'on  1  (contacts  app)   Remote   SQLite   db   Ac=vity  3.1   Ac=vity  3.2   Applica'on  3   Content  Provider   Soham  Mondal  
25. ANDROID BUILDING BLOCKS Ac=vi=es   Android  manifest.xml   Intents   Views   Content  providers   Services   No=fica=ons   Soham  Mondal  
26. Ac=vi=es   ANDROID BUILDING BLOCKS Android  manifest.xml   Intents   Views   Content  providers   No=fica=ons   Services   Soham  Mondal  
27. SERVICES •  Faceless task that runs in the background. •  No visual user interface •  Runs in the background certain period of time •  For example: Background music Soham  Mondal  
28. ANDROID BUILDING BLOCKS Ac=vi=es   Android  manifest.xml   Intents   Views   Content  providers   Services   No=fica=ons   Soham  Mondal  
29. Ac=vi=es   ANDROID BUILDING BLOCKS Android  manifest.xml   Intents   Views   Content  providers   Services   No=fica=ons   Soham  Mondal  
30. NOTIFICATIONS •  Notifies the user about events •  Sent through NotificationManager •  Types – persistent icon – sound or vibration Soham  Mondal  
31. ANDROID BUILDING BLOCKS Ac=vi=es   Android  manifest.xml   Intents   Views   Content  providers   Services   No=fica=ons   Soham  Mondal  
32. Ac=vi=es   ANDROID BUILDING BLOCKS Intents   Views   Content  providers   Services   No=fica=ons   Android  manifest.xml   Soham  Mondal  
33. ANDROID MANIFEST •  It names the Java package for the application. •  Components of the application — the activities, services, broadcast receivers, and content providers that the application is composed of. •  Permissions •  Lists the library •  And more Soham  Mondal  
34. ANDROID DEVELOPMENT ENVIRONMENT Soham  Mondal  
35. THE ECLIPSE IDE YOUR ANDROID DEVELOPMENT ENVIRONMENT Soham  Mondal  
36. Perspec=ve   Soham  Mondal  
37. Views   Edit  Area   Views   Views   Soham  Mondal  
38.               Shows  the  program  and   package  structure         Source  of  android  programs  are  shown  here   Shows  various  console  messages,  problems  etc   Outline:   Shows   various   program   elements   Soham  Mondal  
39. THE UI EDITOR Soham  Mondal  
40. Drag  and  drop   elements   Actual  UI  view   Soham  Mondal  
41. THE EMULATOR Soham  Mondal  
42. Soham  Mondal  
43. Soham  Mondal  
44. Emulator  screen   Virtual  keyboard   Menu  &  other   bu8ons   Soham  Mondal  
45. HOW TO INSTALL THE SDK Soham  Mondal  
46. HOW TO INSTALL EVERYTHING? 1.  Eclipse Download and install eclipse classic: http://www.eclipse.org/downloads/ 2.  JDK Download and install: http://www.oracle.com/technetwork /java/javase/downloads/index.html 3.  Android SDK starter package Download and install: http://developer.android.com/sdk/index.html 4.  Android development tools (ADT) plugin Download from within Eclipse: https://dl-ssl.google.com/android/eclipse/ 5.  Add platform and other optional components from within eclipse Soham  Mondal  
47. MONETIZING YOUR APP Soham  Mondal  
48. APP MONETIZATION Free – Ad supported Premium – Pay per title Trial – Upgrade to Premium Freemium – In app billing Paymium – Premium + In-app billing Trial Paymium – Trial + Paymium Subscription – Auto recurrent payment Soham  Mondal  
49. ADVERTIZING User launches your app User clicks on add in your app You get paid for each click Soham  Mondal  
50. PUBLISHING YOUR APP Soham  Mondal  
51. CHECKLIST Follow the checklist - http://developer.android.com/distribute/googleplay/publish/ preparing.html Upload your app apk at - https://play.google.com/apps/publish/ Soham  Mondal  
52. Q&A @s0h4m soham.mondal@gmail.com Soham  Mondal