AutoGenerateBuildName add this in application build.gradle and generate apk file name suitable instead of app.apk

AutoGenerateBuildName.gradle

applicationVariants.all { variant ->
        variant.resValue "string", "versionName", variant.versionName
        variant.outputs.all {
            outputFileName = archivesBaseName
            outputFileName += "-v" + variant.versionName + "-" + variant.buildType.name + "-" + new Date().format('Mddyyyy')
            outputFileName += ".apk"
        }
    }