New Android Languages

Talk about 8 programming languages that can be used in Android development.

For the Droidcon Spain 2015.

Transcript

1. N E W A N D R O I D L A N G U A G E S J A V I E R G A M A R R A : : @ N H PA T T
2. @ N H PAT T @ A G I L E C Y L ( 0 9 / 0 5 ! ) @ L I F E R AY by wiredforlego
3. W H Y ? by keso s
5. by Julochka
6. S E L F - E S T E E M
7. K C Y. M E / 2 2 N A N
8. S W I F T F O R A N D R O I D ? by Andreas
9. G R O O V Y
10. S C A L A
11. X T E N D
12. S W I F T
13. K O T L I N
14. H O W M A N Y L A N G U A G E S H AV E A N D R O I D “ S U P P O R T ” ?
15. • Scala • Kotlin • Groovy • Clojure • Go • Ceylon • XTend • JS • C++ • C# • PHP • Python • Ruby • Swift • QT • Perl • Pascal • Smalltalk
16. A N Y L A N G U A G E …
17. T H AT ’ S W H Y
18. • JS • C++ • C# • PHP • Scala • Kotlin • Groovy • Go • Ceylon • XTend
19. H O W ?
20. • Small TODO app • Uploaded soon to github • Big post coming to nhpatt.com
21. F I G H T ! by wiredforlego
22. X T E N D by Mike
23. X T E N D - W H AT ? • xtend & xtendroid • 2011!
24. X T E N D - H O W ? • Eclipse IDE + SDK, Android Studio incoming? • About 40 minutes
25. X T E N D - C O D E @AndroidActivity(R.layout.activity_main) class MainActivity { @OnCreate def init(Bundle savedInstanceState) { } }
26. X T E N D - C O D E myButton.onClickListener = [ toast("My message"); ]
27. X T E N D - C O D E val toUpperCaseFunction = [String s|s.toUpperCase]
28. X T E N D - T H I N G S • Extension methods • Lambda expressions • Implicits • Operator overloading • Compiles to Java Code
29. X T E N D - O P I N I O N • Perfect for consulting companies • Everything does too much • Java+
30. G R O O V Y by Bill Toenjes
31. G R O O V Y - W H AT ? • dynamic (2003) & static (2012!)
32. G R O O V Y - H O W ? • Android Studio, Groovy Gradle Plugin • In groovy folder • About 30 minutes • SwissKnife
33. G R O O V Y - C O D E def message = findViewById(R.id.message) as TextView
 message.text = messageText;
34. G R O O V Y - C O D E button.onClickListener = {startActivity(intent)} @OnClick
35. G R O O V Y - T H I N G S • Dynamic code & static code (@CompileStatic) • Traits • Better apis • Great gradle integration (dagger support coming)
36. G R O O V Y - S TAT I C
37. G R O O V Y - R U N T I M E
38. G R O O V Y - O P I N I O N • Java++ • Dynamic code? • I like groovy but…
39. C E Y L O N by Mike
40. C E Y L O N - W H AT ? • Ceylon • Gavin King • 2011
41. C E Y L O N - H O W ? • Eclipse IDE + Ceylon Plugin + PAIN • About 6 hours (eclipse hell + ceylon hell)
42. A N D R O I D D O C U M E N TAT I O N
43. A N D R O I D D O C U M E N TAT I O N
44. C E Y L O N - C O D E shared actual void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.\Ilayout.activity_main); assert (is TextView textView = findViewById(R.\Iid.action_settings)); }
45. C E Y L O N - T H I N G S • Type system • Mixins • String? • Packages and modules inside Ceylon
46. C E Y L O N - O P I N I O N • Not ready. Future? • Doubt so.
47. S C A L A by Mike
48. S C A L A - W H AT ? • Scala • 2003
49. S C A L A - H O W ? • Gradle plugin? • Post 47 degrees: Idea + plugins + SBT + activator… • About 1 hour
50. T R O L L I N G S C A L A • findView without casts -> a trait • scala one liners -> hard to read by others but nice in collections • scala -> 2.8M with proguard -> heaviest environment • NPE -> with optionals, great solution IMHO • implicit context -> magic everywhere • traits -> quite common (kotlin, ceylon, ‘groovy’…) • no getters/setters -> quite common • pattern matching -> it’s nice but pure functional style • case classes -> a glorified switch/if
51. S C A L A - T H I N G S • Types • Multiple programming styles • Optional
52. S C A L A - O P I N I O N • I love scala, way better than Java, but… • Paradigm swift • Programmers (25 in TIOBE)
53. S C A L A - S C A L O I D new SVerticalLayout { STextView("Sign in").textSize(24.5 sp).<<.marginBottom(25 dip).>> STextView("ID") SEditText() STextView("Password") SEditText() inputType TEXT_PASSWORD SButton("Sign in") this += new SLinearLayout { SButton("Help") SButton("Sign up") }.wrap }.padding(20 dip)
54. S C A L A - M A C R O I D // the layout goes here setContentView { getUi { l[LinearLayout]( w[Button], w[TextView] ) } }
55. G O by Nico Kaiser
56. G O - W H AT ? • Go • 2009
57. G O - W H AT ?
58. “ W h o s e b e t t i n g t h i s y e a r s I / O w i l l a n n o u n c e t h e re p l a c e m e n t o f t h e A n d ro i d A P I w i t h t h e G o A P I ? “
59. “ I l l o g i c a l , i r re s p o n s i b l e , i n s a n e p e o p l e a re b e t t i n g t h i s . ” “ G o , f o r C p e o p l e w h o h a t e C + + b u t a re t o o a f r a i d o f re a l I D E s f o r J a v a . ” J a k e W h a r t o n
60. G O - H O W ? • Docker image (docker -> boot2docker -> missing steps -> worst hello world ever!) • About 2 hours (image is 4GB! + docker errors + no documentation)
61. G O - C O D E • 2 ways: • Shared Library (JNI…) • All go
62. G O - C O D E • var State • func Run • type Callbacks (Start, Stop, Draw) • Stubs
63. G O - O P I N I O N • API for OpenGL/business logic • Not ready for “classic” app. • I’m worried about iOS support
64. K O T L I N by Mike
65. K O T L I N - W H AT ? • Kotlin • 2011
66. K O T L I N - H O W ? • Android Studio plugin • About 10 minutes
67. K O T L I N - T H I N G S • Traits • Interoperability with Java! • Extension Methods • Null?
68. T R O L L I N G K O T L I N • class Leiva : Untrollable
69. K O T L I N - O P I N I O N • I love Kotlin. • Really easy learning curve. • Few programmers doing Kotlin :(
70. J AVA 8 asdasdasd by Mike
71. J AVA 8 • JDK7: <>, multi-catch, strings in switches, try with resources… • And java NIO/invokedynamic?
72. J AVA 8 • And Java 8? (Lambdas/default methods/new date API…)
73. • Jack & Jill?
74. R E T R O L A M B D A asdasdasd by Marcos Bessa
75. R E T R O L A M B D A - W H AT ? • Lambdas • Default Methods • Static Methods on interfaces
76. R E T R O L A M B D A - H O W ? • Gradle Plugin • About 30 minutes
77. R E T R O L A M B D A - C O D E (View v) -> Toast.makeText(this, “Hi!”, LENGTH_SHORT).
78. R E T R O L A M B D A - O P I N I O N • An incomplete hack. • Nice if you don’t have any other option.
79. A N D T H E T R O P H I E S G O T O …
80. G O F O R B E I N G T H E M O S T H Y P E D by David Luders
81. C E Y L O N F O R N O T B E I N G T H E R E by David Luders
82. S C A L A C O N S O L AT I O N P R I Z E by David Luders
83. K O T L I N by David Luders
84. F I N A L W O R D S by jmiguel rodriguez
85. N O T A N E W Q U E S T I O N
86. T H AT M E A N S S O M E T H I N G
87. N O T O N LY S Y N TA C T I C S U G A R asdasdasd by Steve Maw
88. D A R T A N Y O N E ? by Sasha Nilov
89. N E X T asdasdasd by Pascal
90. E N D * * ¿ A L G U I E N Q U I E R E Q U E L E M O N T E U N E N T O R N O ? asdasdasd by Gord McKenna
91. A N Y Q U E S T I O N S ?
92. T H A N K S ! - > K C Y. M E / 2 2 N D 2 by Ale Art
93. O K … K O T L I N V S S C A L A , F I G H T !
94. O K … K O T L I N V S S C A L A , F I G H T !
95. O K … K O T L I N V S S C A L A , F I G H T !
96. O K … K O T L I N V S S C A L A , F I G H T !
97. O K … K O T L I N V S S C A L A , F I G H T ! • Kotlin ppl are nice: comparison to scala -> if u are already using Scala or need sth on that list… • A good, external, comparison
98. O K … K O T L I N V S S C A L A , F I G H T ! • The main design goals behind “Kotlin” are: • To create a Java-compatible language, • That compiles at least as fast as Java, • Make it safer than Java, i.e. statically check for common pitfalls such as null pointer dereference, • Make it more concise than Java by supporting variable type inference, higher-order functions (closures), extension functions, mixins and first- class delegation, etc; • And, keeping the useful level of expressiveness (see above), make it way simpler than the most mature competitor – Scala.
99. N E W A N D R O I D L A N G U A G E S J A V I E R G A M A R R A : : @ N H PA T T