How to disable an item in a Spinner

Is it possible to display particular entries in a Spinner list as disabled?

I.e., I want to always display a spinner with four entries (North, South, East, and West, say), but I want to be able to disable any one of these so that is appears greyed out and not selectable.

Is this possible, or will I have to recreate the list each time, leaving开发者_Python百科 out the invalid entries?

   // Create spinner month, and disable month < today
    List<CharSequence> listMonth = new ArrayList<CharSequence>();
    for (int m = 0; m < 12; m++) {
        if (m < 9) {
            listMonth.add("0" + (m + 1));
        } else {
            listMonth.add("" + (m + 1));
        }
    }
        // Create spinner item
    adapterMonth = new ArrayAdapter<CharSequence>(this,
            R.layout.layout_spinner_item, listMonth) {
         // Disable click item < month current
        @Override
        public boolean isEnabled(int position) {
            // TODO Auto-generated method stub
            if (year <= max_year && position < max_month - 1) {
                return false;
            }
            return true;
        }
        // Change color item
        @Override
        public View getDropDownView(int position, View convertView,
                ViewGroup parent) {
            // TODO Auto-generated method stub
            View mView = super.getDropDownView(position, convertView, parent);
            TextView mTextView = (TextView) mView;
            if (year <= max_year && position < max_month - 1) {
                mTextView.setTextColor(Color.GRAY);
            } else {
                mTextView.setTextColor(Color.BLACK);
            }
            return mView;
        }
    };

    adapterMonth
            .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spn2.setAdapter(adapterMonth);

    public class MySpinnerAdapter extends BaseAdapter {

    @Override
    public void isEnabled(int position) {
       return getItem(position).isEnabled(); 
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

      if(convertView == null) {
          convertView = View.inflate(parent.getContext(), R.layout.item, null);
      }
      if(!isEnabled(position)) {
          convertView.setEnabled(false);
          convertView.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                //NO-OP: Just intercept click on disabled item
             }
          });
      }

      return convertView;
    }
}

Someone just posted a solution to your problem, refer to this old post.

Is this possible

It doesn't appear so. The way you would do that with ListView involves areAllItemsEnabled() and isEnabled(). However, those are methods on the ListAdapter interface, not the SpinnerAdapter interface. So, I suspect they will be ignored by a Spinner.

class SpinnerAdapter(context: Context, resource: Int, list: ArrayList<String>)
    : ArrayAdapter<String>(context, resource, list) {

        override fun isEnabled(position: Int): Boolean {
            // select position to disable 
            return position != 0
        }

}