The document discusses Gradle, an open-source build automation system that utilizes a Groovy DSL instead of XML for project configuration, drawing from concepts of Apache Ant and Maven. It includes snippets of Gradle build configurations for Android applications, such as SDK versions and dependency management, while also showcasing examples of Groovy functions and closures. Additionally, it outlines the structure of build scripts, including plugins, dependencies, and configurations for APK signing.

1. .gradle

2. •
• 2
• ( ) 2
•
• 5 🤗
• 3 , 4.5 ?
…?🤔

3. ?

4. [ ] .

5. +
It works! 🥳

6. +
•
• , , …
• API
•
•
• Stackoverflow

7. [ ] .
•
•
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8. android {
compileSdkVersion 28
defaultConfig {
applicationId “a.b.c”
minSdkVersion 21
targetSdkVersion 28
……
}
}
JSON? 🤔

9. dependencies {
implementation fileTree(dir: 'libs', include: [‘*.jar'])
}
CODE? 🤔

10. Gradle is an open-source build automation system that builds upon
the concepts of Apache Ant and Apache Maven and introduces
a Groovy-based domain-specific language (DSL) instead of
the XML form used by Apache Maven for declaring the project
configuration.
Gradle by wikipedia

11. •
• Groovy DSL ( )
Gradle is an open-source build automation system that builds upon
the concepts of Apache Ant and Apache Maven and introduces
a Groovy-based domain-specific language (DSL) instead of
the XML form used by Apache Maven for declaring the project
configuration.
Gradle by wikipedia

12. by wikipedia
? APK!

13. by wikipedia
•
•
•
•

14. DSL
• DSL .
• =
• ex) Emacs Emacs Lisp
• Gradle DSL - Gradle
• Groovy Gradle

15. Groovy by wikipedia
• , ,
.
• .
• -
• Python, JavaScript, …

16. take coffee with sugar, milk and liquor
take(coffee).with(sugar, milk).and(liquor)

17. a = "a"
def b = "b"
multiply = a * b !// error!
one = 1
str = "I'm the $one"

18. def addAndPrint(num1, num2) {
result = num1 + num2
println(result)
}
addAndPrint 3, 5
addAndPrint(3, 5)

19. def sayHello(paramMap) {
first = paramMap.firstName
last = paramMap.lastName
println "Hello, $first $last"
}
sayHello lastName: " ", firstName: " "
!// hello,

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•
•
1 (first-class citizens)

21. •
•
fun main(args: Array<String>) {
fun twice(number: Int): Int {
return number * 2
}
val numbers = listOf(1, 2, 3, 4, 5)
val lambda = !::twice
val result = numbers.map(lambda)
println(result)
!// prints [2, 4, 6, 8, 10]
}
Example.kt

22. def doExecute(fun) {
fun()
}
printHello = {
println "Hello"
}
doExecute(printHello)
doExecute printHello
doExecute { println "Hello" }
•
•
• Closure

23. def printNumberAndExecute(num, fun) {
println num
fun()
}
printHello = {
println "Hello"
}
printNumberAndExecute(3, printHello)
!// result

24. printNumberAndExecute(3, printHello)
printNumberAndExecute 3, printHello
printNumberAndExecute 3, { println "Hello" }
printNumberAndExecute(3) { println "Hello" }
printNumberAndExecute 3 { println "Hello" }

25. printNumberAndExecute(3, printHello)
printNumberAndExecute 3, printHello
printNumberAndExecute 3, { println "Hello" }
printNumberAndExecute(3) { println "Hello" }
printNumberAndExecute 3 { println "Hello" }

26. printNumberAndExecute 3 { println "Hello" }
groovy.lang.MissingMethodException: No
signature of method: java.lang.Integer.call() is
applicable for argument types:

27. build.gradle
testImplementation("com.robolectric:robolectric:3.3.2") {
exclude group: 'org.apache.ant'
}
..?

28. • Delegate
•

29. def printClosure = { printText "Delegated by" }
class WriterOne {
def printText(str) { println "$str WriterOne" }
}
class WriterTwo {
def printText(str) { println "$str WriterTwo" }
}
printClosure.delegate = new WriterOne()
printClosure() !// "Delegated by WriterOne"
printClosure.delegate = new WriterTwo()
printClosure() !// "Delegated by WriterOne"

30. class Greet {
def name
Greet(name) { this.name = name}
}
Greet.metaClass.bye = { println "Goodbye, $name" }
greet = new Greet("KyoungJoo")
greet.bye()

31. build.gradle
testImplementation("com.robolectric:robolectric:3.3.2") {
exclude group: 'org.apache.ant'
}
?
..?
Delegate

32. android {
……
}
dependencies {
testImplementation("com.robolectric:robolectric:3.3.2") {
exclude group: 'org.apache.ant'
}
}
build.gradle

33. ?
• Delegate
•
• Delegate
•
•
•

34. Delegate
Type of script Delegates to instance of
Common Script
Build script Project
Init script Gradle
Settings script Settings

35. include ':presentation', ':domain', ':data'
Settings.gradle
Type of script Delegates to instance of
Common Script
Build script Project
Init script Gradle
Settings script Settings

36. . . . . . . . . . . . . . . .
Settings API Documentation

37. android {
……
}
dependencies {
testImplementation("com.robolectric:robolectric:3.3.2") {
exclude group: 'org.apache.ant'
}
}
build.gradle
Build script Project

38. Product API Documentation

39. android {
……
}
dependencies {
testImplementation("com.robolectric:robolectric:3.3.2") {
exclude group: 'org.apache.ant'
}
}
build.gradle
testImplementation ?

40. void dependencies
(Closure configureClosure)
• Configures the dependencies for this project.
• This method executes the given closure against
the DependencyHandler for this project.
The DependencyHandler is passed to the closure
as the closure's delegate.
• Closure DependencyHandler Delegate

41. 0/0🤔

42. ?
• Delegate
•
• Delegate
•
•
•

43. plugin

44. android {
compileSdkVersion 28
defaultConfig {
……
}
buildTypes {
……
}
}

45. apply plugin: 'com.android.application'

46. . . . . . . . . . . . . . .
. . . . . . . . . . . . . .

47. android {
compileSdkVersion 28
defaultConfig {
applicationId “a.b.c”
minSdkVersion 21
targetSdkVersion 28
……
}
}

48. ?
• Delegate
•
• Delegate
•
•
•
Gradle
Block ,
Delegate
( ) Plugin .
Plugin

49. => Groovy Gradle !
• Groovy Groovy .
• Gradle API Groovy Kotlin
.

50. Gradle.
• ProductFlavor
• BuildConfig
•
• Apk

51. signingConfigs {
release {
storeFile new File(System.properties['user.home'],
teamupKeystoreProperties['RELEASE_STORE_FILE'])
storePassword teamupKeystoreProperties['RELEASE_STORE_PASSWORD']
keyAlias teamupKeystoreProperties['RELEASE_KEY_ALIAS']
keyPassword teamupKeystoreProperties['RELEASE_KEY_PASSWORD']
}
someVender {
storeFile new File(System.properties['user.home'],
someVenderKeystoreProperties['RELEASE_STORE_FILE'])
storePassword someVenderKeystoreProperties['RELEASE_STORE_PASSWORD']
keyAlias someVenderKeystoreProperties['RELEASE_KEY_ALIAS']
keyPassword someVenderKeystoreProperties['RELEASE_KEY_PASSWORD']
}
}
Groovy
• flavor keystore
)

52. Groovy
variant.outputs.all {
outputFileName = outputFileName.replaceFirst(".apk",
"-v${versionCode}-${Instant.now()}.apk")
}

53. Gradle.
• https://developer.android.com/studio/build
• Android - - -
•
• ( )
•

54. Gradle Kotlin DSL
• Groovy Kotlin DSL
• IDE
• 12 1.0
•

55. repositories {
maven { setUrl("http:!//dl.bintray.com/kotlin/kotlin-eap") }
mavenCentral()
jcenter()
}
dependencies {
implementation(kotlin("stdlib-jdk8"))
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-
core:1.0.1")
testCompile("junit", "junit", "4.12")
}