Gradle presentation

Gradle not just an ANT replacement

Goals of Gradle (from official docs)● Make it easy reuse code and resources (.aar)● Make it easy to create several variants of an application● Make it easy to configure, extend and customize the

build process● Good IDE integration

About Gradle

● Is based on groovy:○ binary-compatible with java○ Most java code is syntactically valid on Groovy○ The gradle installation comes with groovy

● You better use a gradle wrapper for your android projects

Android Studio

● If something goes wrong, use gradle on the command line

● use this button: ● One update can “break” your project● If something goes wrong, use gradle on the command

line

Basic gradle configbuildscript {

repositories {

mavenCentral()

} dependencies {

classpath 'com.android.tools.build:gradle:0.6.0+'

}

}

apply plugin: 'android'

android {

compileSdkVersion 19

}

Adding libsdependencies {

// MavenCentral deps

compile 'com.android.support:support-v4:19.0.0'

compile 'com.android.support:appcompat-v7:19.0.0'

compile 'com.squareup.retrofit:retrofit:1.2.2'

compile 'com.squareup.okhttp:okhttp:1.2.1'

// project dep:

compile project(“:libraries:lib1”)

// jar dep:

compile files(‘libs/a.jar”, “libs/b.jar”)

compile fileTree(dir: “libs”, include: “*.jar”)

}

Basic gradle commands$ gradle tasks

$ gradle tasks --all

$ gradle assembleDebug

$ gradle assembleRelease

$ gradle clean

$ gradle installDebug

$ gradle uninstallAll

Gradle build customizationandroid {

compileSdkVersion 19

defaultConfig {

versionCode 1

versionName "1.0"

minSdkVersion 16

targetSdkVersion 16

}

}

Build TypesbuildTypes {

debug {

packageNameSuffix ".debug"

}

release {

runProguard true

proguardFile getDefaultProguardFile('proguard-android-

optimize.txt')

}

}

$ gradle installFreeDebug

Build VariantsproductFlavors {

free {

packageName "com.bitcoinlab.android.free"

buildConfig “public static final boolean FULL_VERSION =

false;”

}

full {

packageName "com.bitcoinlab.android.full"

versionName "2.0"

versionCode 20

buildConfig “public static final boolean FULL_VERSION =

true;”

signingConfig signingConfigs.myConfig

}

}

$ gradle installFullDebug

src/full/java/src/”packagename”/file.java

src/full/res/values/strings.xml

src/full/AndroidManifest.xml

dependencies {

fullCompile ‘com.squareup.okhttp:okhttp:1.2.1'

}

A source file can’t exists on main src folder and at

the same time on a flavour src folder: put a class into

main, or in every buildType but not both.

Build Variants specific files & deps

BuildConfigimport java.text.SimpleDateFormat

def buildTime() {

def df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'")

df.setTimeZone(TimeZone.getTimeZone("UTC"))

return df.format(new Date())

}

defaultConfig {

buildConfig """\

public static final String GIT_SHA = "${gitSha()}";

public static final String BUILD_TIME = "${buildTime()}";

"""

}

Android Studio Integration

Some things you can do with gradle● free/paid apk

● debug/release version

● beta/alpha/”any git branch” apk

● Use multiple flavors + multiple-apk play store support to distribute

smaller apks (depending on screen size or android version)

● build your customized integration and test server in minutes

Oriol Jiménez

@oriolj

[email protected]