Android Gradle 3.0plugin, Cannot

Android Gradle 3.0.0-alpha2 plugin, Cannot set the value of read-only property 'outputFile'

When use this code

application Variants.all { variant ->
variant.outputs.each { output ->
def SEP = "_"
def flavor = variant.productFlavors[0].name
def buildType =
variant.variantData.variantConfiguration.buildType.name
def version = variant.versionName
def date = new Date()
def formattedDate = date.format('ddMMyy_HHmm')
def newApkName = PROJECT_NAME + SEP + flavor + SEP + buildType + SEP + version + SEP + formattedDate + ".apk"
def file = new File(newApkName)
output.outputFile = file
}
}

to change the name of apk file when i build new apk, but since i use the Android Studio 3.0 Canary 2 this error appear:
Cannot set the value of read-only property 'outputFile'....

Solution:

As Android plugin 3.0 migration guide suggests:

Use all()
instead of each()

Use outputFileName
instead of output.outputFile
if you change only file name (that is your case)

Example from the guide:

// If you use each() to iterate through the variant objects,// you need to start using all(). That's because each() iterates// through only the objects that already exist during configuration time—// but those object don't exist at configuration time with the new model.// However, all() adapts to the new model by picking up object as they are// added during execution.android.applicationVariants.all { variant -> variant.outputs.all { outputFileName = "${variant.name}-${variant.versionName}.apk" }}