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);