Hi,
If you use formatted text view instead of text view, you could achieve it. In formatted text view you could set a html using script. To achieve that you can set html like this.
FORMATTEDTEXTVIEW_1.setHtmlText("<p><span class='red'>Red</span> color <span class='green'>Green</span></p>");
After that define your custom css as below.
.red {color: red; }
.green{color: green;}
Hope this helps.
Thanks,
Mohan Raj D.