Making DrawableLeft,Right,Down,Top Clickable Android

edtPassword.setOnTouchListener(new View.OnTouchListener() {
    @Override    public boolean onTouch(View v, MotionEvent event) {
        final int DRAWABLE_LEFT = 0;
        final int DRAWABLE_TOP = 1;
        final int DRAWABLE_RIGHT = 2;
        final int DRAWABLE_BOTTOM = 3;

        if (event.getAction() == MotionEvent.ACTION_UP) {
            if (event.getRawX() >= (edtPassword.getRight() - 

   edtPassword.getCompoundDrawables()[DRAWABLE_RIGHT].getBounds().width())) {

                if (edtPassword.getInputType() == (InputType.TYPE_CLASS_TEXT |
                        InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD)) {

                    edtPassword.setInputType(InputType.TYPE_CLASS_TEXT |
                            InputType.TYPE_TEXT_VARIATION_PASSWORD);
                } else {
                    edtPassword.setInputType(InputType.TYPE_CLASS_TEXT |
                            InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
                }

                return false;
            }
        }
        return false;
    }
});