Edit: The solution accepted is working only if you are using an old version of Crashlytics (I was using v1.1.11). If you are using Fabric SDK you will notice
the tasks of the plugin have changed considerably and the script below
will not work. Also the API secret is not needed anymore, therefore
you can just use the <meta> in the manifest to specify the API key along with a manifest placeholder defined in your flavor:
in build.gradle:
flavor1 {
...
manifestPlaceholders = [crashlyticsApiKey: CRASHLYTICS_API_SECRET_HERE]
...
}
in AndroidManifest.xml:
...
<meta-data
android:name="com.crashlytics.ApiKey"
android:value="${crashlyticsApiKey}" />
...
There is another undocumented way to specify the Crashlytics key as noted here, and it is to use the crashlytics.properties (in the root of your project) to specify that value along with the API secret:
apiKey=YOUR_API_KEY
apiSecret=YOUR_API_SECRET
Unfortuntately this will not allow you to simply specify a different crashlytics.properties for each flavor, because it needs to be in the root of your project in order to be picked correctly by the gradle plugin. That means you need to generate that file dynamically.
The idea is to add the key/secret values in your flavor as custom properties, and generate the crashlytics.properties at buildtime, using the values from the current flavor to fill the file.
The build.gradle inside your android module should look like this:
...
productFlavors {
flavor1 {
...
set("crashlyticsApiKey", CRASHLYTICS_API_KEY_HERE)
set("crashlyticsApiSecret", CRASHLYTICS_API_SECRET_HERE)
...
}
...
}
File crashlyticsProperties = new File("${project.projectDir.absolutePath}/crashlytics.properties")
applicationVariants.all { variant ->
variant.productFlavors.each { flavor ->
def variantSuffix = variant.name.capitalize()
def generateResourcesTask = project.tasks.getByName("crashlyticsGenerateResources${variantSuffix}")
def generatePropertiesTask = task("crashlyticsGenerateProperties${variantSuffix}") << {
Properties properties = new Properties()
println "...copying apiSecret for ${variant.name}"
properties.put("apiSecret", flavor.crashlyticsApiSecret)
println "...copying apiKey for ${variant.name}"
properties.put("apiKey", flavor.crashlyticsApiKey)
properties.store(new FileWriter(crashlyticsProperties), "")
}
generateResourcesTask.dependsOn generatePropertiesTask
def cleanResourcesTask = project.tasks.getByName("crashlyticsCleanupResourcesAfterUpload${variantSuffix}")
cleanResourcesTask.doLast {
println "...removing crashlytics.properties"
crashlyticsProperties.delete()
}
}
}
...
Basically the script hooks in the building process and generates/fills the properties file just before the Crashlytics gradle plugin does its magic.
