Text || RichText Widget

 Text Widget 

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Example: #1[]

import 'package:flutter/material.dart';

void main() => runApp(MaterialApp(
      home: MyApp(),
    ));

class MyApp extends StatefulWidget {
  @override
  MyAppState createState() => MyAppState();
}

class MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Hello World!'),
      ),
      body: Container(
        child: Align(
          alignment: Alignment.center,
          child: Text(
            'Hello World! Hello World! Hello World! Hello World!',
            style: TextStyle(fontWeight: FontWeight.bold, fontSize: 40,
            color: Colors.blue,
              decoration: TextDecoration.combine([
                TextDecoration.overline,
                TextDecoration.underline,
              ]),

              decorationThickness: 2.0,
                decorationColor: Colors.red,
              decorationStyle: TextDecorationStyle.wavy,
              letterSpacing: 5.0,
              wordSpacing: 10.0,
              shadows: [
                Shadow(
                  color: Colors.black,
                  blurRadius: 2.0,
                  offset: Offset(2,1)
                )
              ]
            ),
            textAlign: TextAlign.justify,
            maxLines: 2,
            overflow: TextOverflow.ellipsis,
            textScaleFactor: 2,

          ),
        ),
      ),
    );
  }
}

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Example: #2[]
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
void main()=>runApp(MaterialApp(home: MyApp(),));

class MyApp extends StatefulWidget {
  @override
  MyAppState createState()=>MyAppState();
}
class MyAppState extends State<MyApp>{
  final TapGestureRecognizer _gestureRecognizer = TapGestureRecognizer()..onTap=(){
    debugPrint('Hello World');
  };

  Widget build(BuildContext context){
    return Scaffold(
      appBar: AppBar(
        title: Text('RichText'),
      ),
      body: Center(
        child: Container(
          child: RichText(
            text: TextSpan(
              text: "don't have an account?  ",
              style: TextStyle(color: Colors.black),
              children: [
                TextSpan(
                  text: 'Register', style: TextStyle(fontWeight: FontWeight.bold, color: Colors.blue),
                  recognizer:_gestureRecognizer
                ),
              ]
            ),
          ),
        ),
      ),
    );
  }
}

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Example: #3[]

import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
void main()=>runApp(MaterialApp(home: MyApp(),));

class MyApp extends StatefulWidget {
  @override
  MyAppState createState()=>MyAppState();
}
class MyAppState extends State<MyApp>{
  final TapGestureRecognizer _gestureRecognizer = TapGestureRecognizer()..onTap=(){
    debugPrint('Hello World');
  };

  Widget build(BuildContext context){
    return Scaffold(
      appBar: AppBar(
        title: Text('RichText'),
      ),
      body: Center(
        child: Container(
          child: RichText(
            text: TextSpan(
              text: "Share  ",
              style: TextStyle(color: Colors.black, fontWeight: FontWeight.bold, fontSize: 40.0),
            children: [
              WidgetSpan(
                child: Icon(Icons.share,
                ),
                alignment: PlaceholderAlignment.middle
              ),
            ]
            ),
          ),
        ),
      ),
    );
  }
}

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Example: #3[]