Android Developer - Music Player from scratch GDG Cebu DevFest 2014 View the app here: https://play.google.com/store/apps/details?id=webninja.com.simplemusicplayer Source code here: https://github.com/keithics/gdgcebu2014-musicplayer

1. KEITH LEVI LUMANOG
MUSIC PLAYER FROM
SCRATCH
Android Development for Noobs

2. PLANNING STAGE

3. MUSIC PLAYER PLANS
• create a list
• add event on click on each list
• pass data to the detail page
• add play/pause button
• play music
• stop music when app is on background

4. Take time to think - take a nap , chill

5. 0. HELLO WORLD

10. EASY ENOUGH?
lets take a look at the code

14. GENERATED FILE STRUCTURE

17. What to choose?
ActionbarActivity
ListActivity
Activity
FragmentActivity

18. with Actionbar

19. 1. CREATING A LIST VIEW

21. ListView
ListItem

23. ListItem Adapter

24. HIT RUN AND PREVIEW

25. ListItems
ListView

26. 2. LISTITEM EVENTS

28. Item position
One, zero index

29. 3.PASSING DATA

33. What’s the problem with this code?
MainActivity.java

34. WE NEED TO PASS MULTIPLE
DATA
1. mp3 file name
2. song title

36. Change String to Object

37. That easy?

38. Create new Java Class

43. Logcat on events

44. Finally we can pass multiple data!

45. RECEIVING DATA

46. Dynamic based
on song title
Play
Dynamic based
on song title
or artist name
add this button
when clicked, plays the
song and changes the text
to pause

47. CREATING AN INTERFACE

48. Play

51. JAVA TIME!

52. mainactivity

53. Dynamic based
back button
doesn’t work
Dynamic based
on song title
on artist name
chill lang usa diha

54. PlayActivity.java

55. Manifest file

56. New Manifest file
Parent activity meta-data to support 4.0 and lower

57. PlayActivity.java

58. RUN AND RELAX

59. MUSIC PLAYER PLANS
• create a list
• add event on click on each list
• pass data to the detail page
• add play/pause button
• play music
• stop music when app is on background

60. PlayActivity.java

61. activity_play.xml

62. THAT’S IT?

64. put the mp3 files on the raw folder
must be the same file name with the list object

65. PlayActivity.java
why onResume?

66. Android Activity Life Cycle

67. RUN AND TEST!

68. PROBLEM?
the music keeps on playing! even minimised or when clicking
back

69. SOLUTION

70. THAT’S IT!
make sure to test on an actual device

71. WHAT WE DIDN'T DO?
• Android Studio installation
• creating virtual devices
• SDK installation
• launcher icons

72. https://play.google.com/store/apps/details?
id=webninja.com.simplemusicplayer

73. https://github.com/keithics/gdgcebu2014-musicplayer

74. Keith Levi Lumanog
THANK YOU!