Set TextView style (bold or italic) programmatically

use following code to change style

textView.setTypeface(null, Typeface.BOLD_ITALIC);
textView.setTypeface(null, Typeface.BOLD);
textView.setTypeface(null, Typeface.ITALIC);
textView.setTypeface(null, Typeface.NORMAL);

change null to textView.getTypeface() to preserve current typeface