Flutter: Is it possible to format (bold, italicize, etc) with-in the string only before passing to the text widget?

Question

For example :

String desc = "<bold>Hello<bold> World";
new Text(desc);

Answer 1

You can use the flutter_html_view package for that.

String html = '<bold>Hello<bold> World';

new HtmlTextView(data: html);

If you just want different styles you can use a RichText widget with TextSpans like this.

new RichText( text: new TextSpan(text: 'Hello ', style: DefaultTextStyle.of(context).style, children:          
<TextSpan>[
new TextSpan(text: 'bold', style: new TextStyle(fontWeight: FontWeight.bold)), 
new TextSpan(text: ' world!'), 
], ), )

Answer 2

You can have a RichText widget, which can take TextSpan as its child. TextSpan can then take multiple TextSpan as its children, and each TextSpan can have its own styles and gesture detectors. An example of how to crate "read more" privacy statement with onTap gesture detector is below. This will give an output as shown below and when clicked on "Read" the app will be routed to '/privacy' page.

class _LoginViewState extends State<LoginView> {
  TapGestureRecognizer _routeToPrivacy;

  @override
  void initState() {
    super.initState();
    _routeToPrivacy= TapGestureRecognizer()..onTap = routeToPrivacy;
  }

  void routeToPrivacy() {
    Navigator.pushNamed(context, '/privacy');
  }

  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      body: Center(
        child: Container(
          width: 200,
          child: Column(  
              RichText(
                text: TextSpan(
                  style: TextStyle(
                      color: Colors.blue.shade900,
                      fontFamily: GoogleFonts.lato().fontFamily),
                  children: [
                    TextSpan(
                      text: 'By signing up you accepts our privacy policy. ',
                    ),
                    TextSpan(
                        recognizer: _routeToPrivacy,
                        text: "Read",
                        style: TextStyle(
                            color: Colors.red.shade500,
                            fontWeight: FontWeight.bold))
                  ],
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

Answer 3

StyledText widget can be used for this.

StyledText(text:desc, 
           styles: { 'bold': ActionTextStyle(fontWeight: FontWeight.bold)},
          );

Answer 4

You can use simple_rich_text package.

SimpleRichText("*Hello* World")