使用Text.rich或者RichText

ListView(

          children: <Widget>[

            Text.rich(

              TextSpan(

                text: 'Text: ',

                children: [

                  TextSpan(text: 'hello '),

                  TextSpan(text: 'world', style: TextStyle(color: Colors.red)),

                ],

              ),

              textScaleFactor: 1.5,

            ),

            new RichText(

              text: new TextSpan(

                text: 'Text: ',

                style: Theme.of(context).textTheme.title,

                children: <TextSpan>[

                  new TextSpan(text: "hello "),

                  new TextSpan(

                    text: "wolrd",

                  ),

                ],

              ),

            ),

          ],

        )