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
780
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
Gleamという選択肢
comamoca
6
760
ドメインモデリングにおける抽象の役割、tagless-finalによるDSL構築、そして型安全な最適化
knih
11
2k
A2A プロトコルを試してみる
azukiazusa1
2
1k
Composerが「依存解決」のためにどんな工夫をしているか #phpcon
o0h
PRO
1
190
Blazing Fast UI Development with Compose Hot Reload (droidcon New York 2025)
zsmb
1
170
AIエージェントはこう育てる - GitHub Copilot Agentとチームの共進化サイクル
koboriakira
0
310
関数型まつりレポート for JuliaTokai #22
antimon2
0
140
つよそうにふるまい、つよい成果を出すのなら、つよいのかもしれない
irof
1
300
GraphRAGの仕組みまるわかり
tosuri13
7
480
[初登壇@jAZUG]アプリ開発者が気になるGoogleCloud/Azure+wasm/wasi
asaringo
0
130
第9回 情シス転職ミートアップ 株式会社IVRy(アイブリー)の紹介
ivry_presentationmaterials
1
220
XP, Testing and ninja testing
m_seki
3
160
Featured
See All Featured
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
45
7.4k
Side Projects
sachag
455
42k
Six Lessons from altMBA
skipperchong
28
3.8k
Navigating Team Friction
lara
187
15k
Optimising Largest Contentful Paint
csswizardry
37
3.3k
Build The Right Thing And Hit Your Dates
maggiecrowley
36
2.8k
4 Signs Your Business is Dying
shpigford
184
22k
Principles of Awesome APIs and How to Build Them.
keavy
126
17k
The Invisible Side of Design
smashingmag
299
51k
jQuery: Nuts, Bolts and Bling
dougneiner
63
7.8k
Documentation Writing (for coders)
carmenintech
71
4.9k
For a Future-Friendly Web
brad_frost
179
9.8k
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