In Flutter, currently there is no toolkit for designing layouts for the application. So you need to create layout manually using codes. Actually creating layout design on flutter is easy and funny. So-many customization is possible with inbuilt properties and styles. Normally Rows, Columns, Container, Card, SizedBox, etc are using for aligning elements, most importantly Rows and Columns, because using rows and column we can design almost anything.
Posts published in May 2019
Simple tutorial for Google's flutter for Android an iPhone applications from a single code base