Both of these widgets use a TextStyle widget to hold the styling information. After that we will see how to style substrings within a RichText widget. We are going to look first at styling strings in a Text widget. OK, that’s enough background information. You can find index numbers with indexOf(): int startIndex = myString.

substring (startIndex, endIndex ) // Flutter

To get a substring you do the following: String myString = 'I ❤️ Flutter.' Styles in Android allow you to define the look and feel, for example colors. I want to review substrings before we go on to text styling, though, since we will be using it later. The String documentation ( here and here) is pretty good, and you should read it if you haven’t already. Open main.dart and replace the code with the following: import 'package:flutter/material.dart' void main ( ) = > runApp ( MyApp ( ) ) class MyApp extends StatelessWidget ' // é⃝ = 'e' + accent mark + circle I’m using Android Studio with the Flutter 1.1 plugin, which uses Dart 2.1. To go through this tutorial you should have the Flutter development environment set up and know how to run an app. Next we’ll move on to styling text for your app, first for entire strings and then for spans within a string. In this tutorial we are going to start with an overview of Dart strings and Unicode. You will need a Flutter development environment set up on your machine.

Android studio theme text size