Android how to make button text bold when pressed or focussed

Question

I want to change the text inside a button to be bold when the button is highlighted or pressed. I currently use a xml file to define the button and use the XML to change how

Answer 1

Styles are not allowed in selectors. Reference

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And to make the text bold, use this code:

btn_reset.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {

        switch (event.getAction()) {
            // When the user clicks the Button
            case MotionEvent.ACTION_DOWN:
                btn_reset.setTypeface(Typeface.DEFAULT_BOLD);
                break;

            // When the user releases the Button
            case MotionEvent.ACTION_UP:
                btn_reset.setTypeface(Typeface.DEFAULT);
                break;
        }
        return false;
    }
});