Gradle is a build system for Android that is based on Groovy. It allows for build variants through product flavors and build types. Project structure in Gradle uses a settings.gradle file to define modules and a gradle.properties file for configuration. Build files define dependencies and configuration. Gradle allows signing, building for different platforms, and managing library and app modules.

1. Do you speak
Gradle?
+Damian Mee
@meeDamian

2. So, what’s gradle?
● It’s a build system
● Based on Groovy
● Extensible (plugins!)
● Introduced to Android with Android Studio
● No support for NDK (yet)

3. CHEERFUL OFFTOP
Developers in Belarus
can now publish
PAID APPS
to
Play Store
:-)

4. Variants
● Build Type (debug or release)
● Product Flavor (paid, free, whitelabel)
● Multi-APK Splits (ARM, x86, MIPS)
COMING SOON

5. Enough bla bla bla
ProjectHome
|-- app
| |-- src
| | |-- main
| | | +-- java
| | | +-- res
| | | |-- AndroidManifest.xml
| | |-- otherFlavor
| |-- build.gradle
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

6. ProjectHome
|-- app
| |-- src
| | |-- main
| | | +-- java
| | | +-- res
| | | |-- AndroidManifest.xml
| | |
| | +-- otherFlavor
| |
| |-- build.gradle
|
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

7. ProjectHome
|-- app
| |-- src
| | |-- main
| | | +-- java
| | | +-- res
| | | |-- AndroidManifest.xml
| | |
| | +-- otherFlavor
| |
| |-- build.gradle
|
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

8. ProjectHome
|-- app
| |-- src
| | |-- main
| | | +-- java
| | | +-- res
| | | |-- AndroidManifest.xml
| | |
| | +-- otherFlavor
| |
| |-- build.gradle
|
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

9. |-- settings.gradle
include ‘:app’

10. include ‘:app’, ‘:FloatingLabel’
|-- settings.gradle (with library projects)
ProjectHome
+-- app
+-- FloatingLabel
|
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

11. ProjectHome
|-- app
| |-- src
| | |-- main
| | | +-- java
| | | +-- res
| | | |-- AndroidManifest.xml
| | |
| | +-- otherFlavor
| |
| |-- build.gradle
|
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

12. ProjectHome
|-- app
| |-- src
| | |-- main
| | | +-- java
| | | +-- res
| | | |-- AndroidManifest.xml
| | |
| | +-- otherFlavor
| |
| |-- build.gradle
|
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

13. |-- gradle.properties
STORE_FILE=/home/mee/dev/android/keys/datKey
STORE_PASSWORD=superSecretPassword
KEY_ALIAS=projecthome
KEY_PASSWORD=unbreakabalePassword
OUTPUT_DIR=/home/mee/dev/android/binaries/ProjectHome
PARSE_KEY_PUBLISHER=NaNNaNNaNNaNNaNNaNNaNNaNNaNNaNNaNNaNNaNNaN

14. ProjectHome
|-- app
| |-- src
| | |-- main
| | | +-- java
| | | +-- res
| | | |-- AndroidManifest.xml
| | |
| | +-- otherFlavor
| |
| |-- build.gradle
|
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

15. ProjectHome
|-- app
| |-- src
| | |-- main
| | | +-- java
| | | +-- res
| | | |-- AndroidManifest.xml
| | |
| | +-- otherFlavor
| |
| |-- build.gradle
|
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

16. ProjectHome
|-- app
| |-- src
| | |-- main
| | | +-- java
| | | +-- res
| | | |-- AndroidManifest.xml
| | |
| | +-- otherFlavor
| |
| |-- build.gradle
|
|-- build.gradle
|-- gradle.properties
|-- settings.gradle

17. apply plugin: 'com.android.application'
android {
compileSdkVersion 'android-L'
buildToolsVersion "20.0"
defaultConfig {
applicationId 'pl.d30.goodnotes'
minSdkVersion 15
targetSdkVersion 'L'
versionCode 1
versionName '1.0'
}
// ...

18. apply plugin: 'com.android.application'
android {
compileSdkVersion 'android-L'
buildToolsVersion "20.0"
defaultConfig {
applicationId 'pl.d30.goodnotes'
minSdkVersion 15
targetSdkVersion 'L'
versionCode 1
versionName '1.0'
}
// ...

19. apply plugin: 'com.android.application'
android {
compileSdkVersion 'android-L'
buildToolsVersion "20.0"
defaultConfig {
applicationId 'com.meedamian.projecthome'
minSdkVersion 15
targetSdkVersion 'L'
versionCode 1
versionName '1.0'
}
// ...

20. // ...
buildTypes {
release {
// here’s where signing code would go
}
}
productFlavors {
otherFlavor {
// flavor-specific configuration, ex:
buildConfigField "String", "PARSE_KEY", PARSE_KEY_PUBLISHER
}
}
}
// ...

21. // ...
buildTypes {
release {
// here’s where signing code would go
}
}
productFlavors {
otherFlavor {
// flavor-specific configuration, ex:
buildConfigField "String", "PARSE_KEY", PARSE_KEY_PUBLISHER
}
}
}
// ...

22. Shameless auto-promotion
meeDamian.com/post/publishing-with-gradle
goo.gl/zmlS10

23. // ...
buildTypes {
release {
// here’s where signing code would go
}
}
productFlavors {
otherFlavor {
// flavor-specific configuration, ex:
buildConfigField "String", "PARSE_KEY", PARSE_KEY_PUBLISHER
}
}
}
// ...

24. // ...
buildTypes {
release {
// here’s where signing code would go
}
}
productFlavors {
otherFlavor {
// flavor-specific configuration, ex:
buildConfigField "String", "PARSE_KEY", PARSE_KEY_PUBLISHER
}
}
}
// ...

25. // ...
buildTypes {
release {
// here’s where signing code would go
}
}
productFlavors {
otherFlavor {
// flavor-specific configuration, ex:
buildConfigField "String", "PARSE_KEY", PARSE_KEY_PUBLISHER
}
}
}
// ...
BuildConfig.PARSE_KEY

26. // ...
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.google.android.gms:play-services:17.0.0'
compile project(":FloatingLabel")
compile files("libs/libraryName.jar")
}

27. // ...
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.google.android.gms:play-services:17.0.0'
compile project(":FloatingLabel")
compile files("libs/libraryName.jar")
}

28. // ...
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.google.android.gms:play-services:17.0.0'
compile project(":FloatingLabel")
compile files("libs/libraryName.jar")
}
gradleplease.appspot.com

29. // ...
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.google.android.gms:play-services:17.0.0'
compile project(":FloatingLabel")
compile files("libs/libraryName.jar")
}

30. // ...
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.google.android.gms:play-services:17.0.0'
compile project(":FloatingLabel")
compile files("libs/libraryName.jar")
}

31. Android Gradle plugin docs SUCK ;-(
But community rocks ;)
+Android Developer Tools
goo.gl/6a0aKP
+Tor Norbye
+Alex Ruiz
[gradle]

32. Fin and Q&A
or
...

33. Fin and Q&A
or
Material Design
A little bit about

35. Material Design
● “paper” and “ink” based design language
● introduced with Android L-something
● cross-everything (mobile, desktop, wear, etc)
● adds depth through shadows
● beautifully crafted (unlike this ugly presentation)

36. Leave teleportation for Star Trek

37. Keep things delightful

38. Structure information

39. Loads of beautifully crafted icons

40. Depth helps with comprehension

41. Interaction emits energy

42. google.com/design

43. Kick start
<style name="Theme.Awesome"
parent="@android:style/Theme.Material.Light.DarkActionBar">
</style>
values-v21/styles.xml
defaultConfig {
targetSdkVersion 'L'
}
app/build.gradle

44. Remarks
● CardView and RecyclerView
● android:colorPrimary, android:colorAccent
● android:tintMode=””

45. Android Studio 0.8.1
Is now in Beta

46. New project structure view (soon)

47. API levels in wizard

48. Layout Editor (menu)

49. Layout Editor (different versions)

50. Typechecking to the resource system

51. Non-retarded emulators!
genymotion.com

52. Other, usual & gradual improvements
● Wear, TV & Glass now in wizard
● RTL layouts improvements
● Eclipse migrate process
● etc...

53. +Damian Mee
@meeDamian
meeDamian.com/post/publishing-with-gradle
goo.gl/zmlS10