Gradle task to print APK signing certificate information (e.g. SHA1 hash)

build.gradle

android.applicationVariants.all { variant ->
	tasks.create(name: "signatureHash${variant.name.capitalize()}", type: Exec) {
		group "util"
		commandLine 'keytool', '-exportcert', '-list', '-v',
				'-alias', variant.signingConfig.keyAlias,
				'-keypass', variant.signingConfig.keyPassword,
				'-keystore', variant.signingConfig.storeFile,
				'-storepass', variant.signingConfig.storePassword
		doFirst {
			println ":: Signing config for variant ${variant.name} is: ${variant.signingConfig.name}\n"
		}
	}
}