Using Gradle for Android

GDG DevFest Netherlands 2014
Source code for the example:
https://github.com/ipanag/Gradle-presentation

Transcript

1. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. GDG DevFest 2014 Using Gradle for Android By Ioannis Panagiotopoulos 1 Sunday 9 November 14
2. Adding emotion to transactional loyalty Meaning... We create digital solutions that help, reward and inspire people shopping, enjoy food every day. 2 Sunday 9 November 14
3. One of our products Menu Stamps Rewards My Collection 3 Sunday 9 November 14
4. Some of our clients 4 Sunday 9 November 14
5. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. Continuous integration • Automation: compile, package, test, on every commit • Quality Java build tools • Ant • Maven • ADT plugin for eclipse (uses customized Ant) • Gradle Build tools 5 Sunday 9 November 14
6. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. Google introduced Gradle in Google I/O 2013 "Gradle combines the power and flexibility of Ant with the dependency management and conventions of Maven into a more effective way to build." Source: gradle.org Why Gradle? 6 Sunday 9 November 14
7. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. Gradle user guide • http://www.gradle.org/docs/current/userguide/ userguide_single.html Android Gradle plugin • http://tools.android.com/tech-docs/new-build-system Documentation 7 Sunday 9 November 14
8. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. • Easy to use multiple versions • No need to manually install • Switch between projects • Wrapper script in both Unix-like and Windows environment • Ensures all team members run the same version within a project Gradle wrapper 8 Sunday 9 November 14
9. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. Configure wrapper • File: gradle/wrapper/gradle-wrapper.properties distributionUrl=http\://services.gradle.org/distributions/ gradle-2.1-all.zip Gradle version 9 Sunday 9 November 14
10. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. Configure • File: build.gradle dependencies { classpath 'com.android.tools.build:gradle:0.14.1' } Good practices • Avoid auto-increment version (‘+’) • Test before upgrade plugins Android Gradle plugin version 10 Sunday 9 November 14
11. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. • Task definition • doFirst • doLast • << • Task dependencies Gradle tasks 11 Sunday 9 November 14
12. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. List of tasks (only tasks in groups are listed) > gradlew tasks Compile Debug build type (default types: Debug, Release) > gradlew clean assembleDebug Use task name abbreviation > gradlew cle asDe GUI tool > gradlew --gui& Running Gradle tasks 12 Sunday 9 November 14
13. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. • Library JAR file compile fileTree(dir: 'libs', include: '*.jar') • Library project compile project(':libraries/lib1') • Maven repo • http://mvnrepository.com/ compile 'com.android.support:support-v4:21.0.0' compile 'com.google.code.gson:gson:2.3' androidTestCompile 'org.robolectric:robolectric:2.3' Dependencies 13 Sunday 9 November 14
14. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. Build file buildConfigField "String", "BUILD_NUMBER", "\"123\"" Output public final class BuildConfig { public static final String BUILD_NUMBER = "123"; } Custom variables 14 Sunday 9 November 14
15. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. Build Variant = flavor + type • Build type (default types: Debug, Release) • Build flavor Task suffix • FlavornameDebug • FlavornameRelease Compile > gradlew assembleMyflavorDebug Build variants 15 Sunday 9 November 14
16. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. productFlavors { free { applicationId "com.example.free" } paid { applicationId "com.example.paid" } } Different applicationId per variant 16 Sunday 9 November 14
17. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. • Ability to separate sources • Merging • Java sources • Manifest SourceSets 17 Sunday 9 November 14
18. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. android { variantFilter { variant -> if(variant.buildType.name.equals('debug') && variant.getFlavors().get(0).name.equals('paid')) { variant.setIgnore(true); } } } Disable a variant 18 Sunday 9 November 14
19. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. applicationVariants.all { variant -> String newName = project.name + "_" + variant.getFlavorName() + "_" + variant.buildType.name + "_" + ciBuildNumber + ".apk" variant.outputs.get(0).setOutputFile(new File(variant.outputs.get(0).getOutputFile().parentFile, newName)) } Change output APK filename 19 Sunday 9 November 14
20. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. Configuration file: settings.gradle Difference • include ':libs/lib1' • include ':libs:lib1' • Run > gradlew :project:task Multiple projects 20 Sunday 9 November 14
21. Copyright © Ioannis Panagiotopoulos, All Rights Reserved. • Save time on subsequent builds • Overhead on first build • Not useful in build servers (fresh build) • Option to disable PreDex PreDex 21 Sunday 9 November 14
22. https://twitter.com/ioannispanag https://www.linkedin.com/in/ipanag You can follow author on: 22 Sunday 9 November 14
23. http://instagram.com/icemobile https://www.facebook.com/IceMobileAmsterdam https://twitter.com/IceMobile http://icemobile.com/blog https://linkedin.com/company/icemobile You can follow us on: 23 Sunday 9 November 14
24. The mobile agency for food retail Copyright © Ioannis Panagiotopoulos, All Rights Reserved. 24 Sunday 9 November 14