android text size, style and color android studio code example

Example: give text color and font size in android string

TextView tv = new TextView(this);
String string= "Hello";
String title="MyTitle";
SpannableString ss1=  new SpannableString(string);
ss1.setSpan(new RelativeSizeSpan(2f), 0, ss1.length(), 0);
tv.append(ss1);
tv.append(title);
setContentView(tv);