I call the class Lova – in Swedish “to promise something” is “att lova något” . This assumes you have converted your Android project to compile with Jack. Warning: Lambdas do not currently work with multidex! See issue 226867. This implementation only supports a single input parameter to the background task, but it the doInBackground method could easily be changed to send the… Continue reading Lova – Java 8 functional interface for AsyncTask on Android