Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Understanding Gradle for Android
Search
Kevin Pelgrims
November 12, 2015
Programming
2
800
Understanding Gradle for Android
Presented at Big Android BBQ Europe 2015
Kevin Pelgrims
November 12, 2015
Tweet
Share
More Decks by Kevin Pelgrims
See All by Kevin Pelgrims
Data binding on Android
kevinpelgrims
5
4.6k
Other Decks in Programming
See All in Programming
Claude Code派?Gemini CLI派? みんなで比較LT会!_20250716
junholee
1
800
AI Ramen Fight
yusukebe
0
120
No Install CMS戦略 〜 5年先を見据えたフロントエンド開発を考える / no_install_cms
rdlabo
0
420
Advanced Micro Frontends: Multi Version/ Framework Scenarios
manfredsteyer
PRO
0
140
202507_ADKで始めるエージェント開発の基本 〜デモを通じて紹介〜(奥田りさ)The Basics of Agent Development with ADK — A Demo-Focused Introduction
risatube
PRO
6
1.4k
[DevinMeetupTokyo2025] コード書かせないDevinの使い方
takumiyoshikawa
2
250
JetBrainsのAI機能の紹介 #jjug
yusuke
0
180
kiroでゲームを作ってみた
iriikeita
0
140
大規模FlutterプロジェクトのCI実行時間を約8割削減した話
teamlab
PRO
0
440
なぜ今、Terraformの本を書いたのか? - 著者陣に聞く!『Terraformではじめる実践IaC』登壇資料
fufuhu
3
380
GUI操作LLMの最新動向: UI-TARSと関連論文紹介
kfujikawa
0
230
構文解析器入門
ydah
7
2k
Featured
See All Featured
Imperfection Machines: The Place of Print at Facebook
scottboms
267
13k
Practical Orchestrator
shlominoach
190
11k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
29
9.6k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
139
34k
Music & Morning Musume
bryan
46
6.7k
Build The Right Thing And Hit Your Dates
maggiecrowley
37
2.8k
Balancing Empowerment & Direction
lara
1
520
The World Runs on Bad Software
bkeepers
PRO
70
11k
Stop Working from a Prison Cell
hatefulcrawdad
271
21k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
Why You Should Never Use an ORM
jnunemaker
PRO
58
9.5k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
Transcript
Understanding Gradle for Android Kevin Pelgrims
About me • Mobile Developer at Drivr • Just launched
Forward • Working with Android since 2011 • .NET developer in a previous life • Big interest in web technology
Schedule • The build file • Groovy basics • Back
to the build file • Custom tasks • Tasks for Android • Tips and tricks
The build file
The build file apply plugin: 'com.android.application' android { compileSdkVersion 23
buildToolsVersion "23.1.0" defaultConfig { applicationId "com.muchgradle" } } dependencies { compile 'com.android.support:appcompat-v7:23.1.0' }
Groovy basics To get Gradle, you need to get Groovy
Verbosity System.out.println("Hello, Java"); println("Hello, Java"); println("Hello, Java") println "Hello, Java"
println 'Hello, Groovy'
Dynamic typing String name = "Andy" def name = 'Andy'
String interpolation def name = 'Andy' def greeting = "Hello,
$name" def name_size = "Your name is ${name.size()} characters long"
Methods public int square(int num) { return num * num;
} square(2); def square(def num) { num * num } square 4
Closures def square = { num -> num * num
} square 8 Closure square = { it * it } square 16
Closures void runClosure(Closure closure) { closure() } runClosure({ println 'Yo!'})
runClosure() { println 'Yo!'} runClosure { println 'Yo!'}
Lists List list = [1, 2, 3, 4, 5] list.each
{ element -> println element } list.each { println it }
Maps Map map = [one:1, two:2, three:3] map.get('one') map['two'] map.three
Maps void print(Map args, String message) { println args println
message } print(one:1, two:2, three:3, 'hello')
The build file
Back to the build file apply plugin: 'com.android.application' android {
compileSdkVersion 23 buildToolsVersion "23.1.0" defaultConfig { applicationId "com.muchgradle" } } dependencies { compile 'com.android.support:appcompat-v7:23.1.0' }
Back to the build file apply plugin: 'com.android.application' project.apply([plugin: 'com.android.application']);
Back to the build file dependencies { compile 'com.android.support:appcompat-v7:23.1.0' }
project.dependencies({ add('compile', 'com.android.support:appcompat-v7:23.1.0', { // Configuration statements }); });
Back to the build file android { compileSdkVersion 23 buildToolsVersion
"23.1.0" defaultConfig { applicationId "com.muchgradle" } } Android plugin: https://developer.android.com/tools/building/plugin-for-gradle.html
Custom tasks
Gradle build lifecycle Initialization Discover all modules
Gradle build lifecycle Initialization Configuration Configure project objects
Gradle build lifecycle Initialization Configuration Execution Execute selected tasks
Defining a task task hello { doLast { println 'Hello,
world!' } } task hello << { println 'Hello, world!' }
Defining a task task hello { println 'Configuration' doLast {
println 'Goodbye' } doFirst { println 'Hello' } }
Ordering task actions task hello { doFirst { println 'Not
really first' } doFirst { println 'First' } doLast { println 'Not really last' } doLast { println 'Last' } }
Ordering tasks (1) task task1 << { println 'Task 1'
} task task2 << { println 'Task 2' } task2.mustRunAfter task1 > gradlew task2 task1 task1 task2
Ordering tasks (2) task task1 << { println 'Task 1'
} task task2 << { println 'Task 2' } task2.dependsOn task1 > gradlew task2 task1 task2
Android tasks
Hooking into the Android plugin android.applicationVariants.all { variant -> println
variant }
Hooking into the Android plugin task hello << { println
'Hello' } android.applicationVariants.all { variant -> variant.assemble.dependsOn hello }
Automatically renaming APKs android.applicationVariants.all { variant -> variant.outputs.each { output
-> } } def file = output.outputFile output.outputFile = new File(file.parent, file.name.replace(".apk", "${variant.versionName}.apk"))
Tips and tricks
The Gradle Wrapper • It’s there by default • It’s
everywhere • It’s always the right version • You can use different versions of Gradle for different projects
Speeding up the build • Use the latest version of
Gradle distributionUrl=https\://services.gradle.org/distributions/ gradle-2.8-all.zip
Speeding up the build • Use the latest version of
Gradle • Change your Gradle properties org.gradle.parallel=true org.gradle.daemon=true org.gradle.jvmargs=-Xms256m -Xmx1024m
Speeding up the build • Use the latest version of
Gradle • Change your Gradle properties • Build modules separately gradlew :app:build :moduledirectoryname:build
Speeding up the build • Use the latest version of
Gradle • Change your Gradle properties • Build modules separately • Exclude modules from the build gradlew assemble -x :libraryproject:assemble
Speeding up the build • Use the latest version of
Gradle • Change your Gradle properties • Build modules separately • Exclude modules from the build • Do some profiling gradlew task --profile
Optimizing the APK • ProGuard android { buildTypes { release
{ minifyEnabled true proguardFiles getDefaultProguardFile ('proguard-android.txt'), 'proguard-rules.pro ...
Optimizing the APK • ProGuard • Automatic resource shrinking android
{ buildTypes { release { minifyEnabled true shrinkResources true ...
Optimizing the APK • ProGuard • Automatic resource shrinking •
Manual resource shrinking android { defaultConfig { resConfigs "en", "da", "nl" } }
Optimizing the APK • ProGuard • Automatic resource shrinking •
Manual resource shrinking android { defaultConfig { resConfigs "hdpi", "xhdpi", "xxhdpi", "xxxhdpi" } }
Resources
Resources • Groovy SDK • http://www.groovy-lang.org/download.html • Gradle DSL •
https://docs.gradle.org/current/dsl/ • Android plugin documentation • https://developer.android.com/tools/building/plugin-for-gradle.html
Resources I wrote a book! https://www.packtpub.com/ application-development/gradle- android
Understanding Gradle for Android twitter.com/kevinpelgrims google.com/+kevinpelgrims kevinpelgrims.com