Create Baseline Profiles for a library

To create Baseline Profiles for a library, use the Baseline Profile Gradle plugin.

There are three modules involved in creating Baseline Profiles for a library:

• Sample app module: contains the sample app that uses your library.
• Library module: the module you want to generate the profile for.
• Baseline Profile module: the test module that generates the Baseline Profiles.

To generate a Baseline Profile for a library, perform the following steps:

1. Create a new com.android.test module—for example, :baseline-profile.
2. Configure the build.gradle.kts file for the :baseline-profile module. The configuration is essentially the same as for an app, but make sure to set the targetProjectPath to the sample app module.
3. Create a Baseline Profile test in the :baseline-profile test module. This needs to be specific to the sample app and must use all the functionalities of the library.
4. Update the configuration in build.gradle.ktss file in the library module, say :library.
1. Apply the plugin androidx.baselineprofile.
2. Add a baselineProfile dependency to the :baseline-profile module.
3. Apply the consumer plugin configuration you want, as shown in the following example.

Kotlin

plugins {
    id("com.android.library")
    id("androidx.baselineprofile")
}

android { ... }

dependencies {
    ...
    // Add a baselineProfile dependency to the `:baseline-profile` module.
    baselineProfile(project(":baseline-profile"))
}

// Baseline Profile Gradle plugin configuration.
baselineProfile {

    // Filters the generated profile rules. 
    // This example keeps the classes in the `com.library` package all its subpackages.
    filter {
        include "com.mylibrary.**"
    }
}

Groovy

plugins {
    id 'com.android.library'
    id 'androidx.baselineprofile'
}

android { ... }

dependencies {
    ...
    // Add a baselineProfile dependency to the `:baseline-profile` module.
    baselineProfile ':baseline-profile'
}

// Baseline Profile Gradle plugin configuration.
baselineProfile {

    // Filters the generated profile rules. 
    // This example keeps the classes in the `com.library` package all its subpackages.
    filter {
        include 'com.mylibrary.**'
    }
}

5. Add the androidx.baselineprofile plugin to the build.gradle.kts file in the app module :sample-app.

   Kotlin

   plugins {
       ...
       id("androidx.baselineprofile")
   }

   Groovy

   plugins {
       ...
       id 'androidx.baselineprofile'
   }

6. Generate the profile by running the following code: ./gradlew :library:generateBaselineProfile.

At the end of the generation task, the Baseline Profile is stored at library/src/main/generated/baselineProfiles.