Level Up with Android Build Variants

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1. Level Up with Android Build Variants
2. Why do I care? • It’d be nice to build multiple variants of an Android app from a single code base • Common variants include: ◦ debug/release ◦ free/paid ◦ dev/staging/production
3. With Eclipse and Ant • Code base contained in library project • Needed an additional project for each variant which referenced library project
5. With Android Studio and Gradle • All contained in single project • Define Build Types and Product Flavours in build.gradle file • Create src directories to hold code specific to each build type/flavour
7. Build Types • Define how to build and package your app • debug and release build types created by default • Can create your own
8. signingConfigs { release { storeFile file( 'release.keystore' ) storePassword 'verysecurepassw0rd' keyAlias 'release' keyPassword 'verysecurepassw0rd' } } buildTypes { release { minifyEnabled true shrinkResources true proguardFiles getDefaultProguardFile( 'proguard-android.txt' ), 'proguard-rules.pro' signingConfig signingConfigs.release } debug{ applicationIdSuffix ".debug" signingConfig null } }
9. Product Flavours • Provide alternative code, resources or configuration • Examples: ◦ Different API endpoints for dev/staging/production environment ◦ Free/paid version
10. Free / Paid • Provide alternative resources and code by creating flavour directory • Gradle creates combination of each Build Type and Product Flavour
11. productFlavors{ free{ applicationId "com.physphil.android.sandbox.free" } paid{ applicationId "com.physphil.android.sandbox.pro" } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.android.support:appcompat-v7:22.2.1' compile 'de.greenrobot:eventbus:2.4.0' // Only full version requires network calls paidCompile 'com.squareup.retrofit:retrofit:1.9.0' paidCompile 'com.squareup.okhttp:okhttp:2.2.0' }
13. Free / Paid
14. Dev / Staging / Production • Define flavour for each server environment • Store API base URL in a Config class • Create directory in src for each flavour, which contains an instance of Config
15. buildTypes { release { minifyEnabled true shrinkResources true proguardFiles getDefaultProguardFile( 'proguard-android.txt' ), 'proguard-rules.pro' signingConfig signingConfigs.release } debug { applicationIdSuffix ".debug" signingConfig null } } productFlavors { dev staging production }
17. That’s Not All! • Modify more build parameters • Include libraries, code, Activities etc only when required • Lots of examples in official docs
18. Additional Resources • http://tools.android.com/tech-docs/new-build- system/user-guide • https://developer.android. com/tools/building/configuring-gradle.html • http://www.vogella. com/tutorials/AndroidBuild/article.html
19. Questions?