Java – dynamic spinners – if you select an item from one spinner, hide it from the other spinners – Android

How do I hide items in other spinners currently selected in one spinner?

I've tried to delete the item through the ArrayList string and arrayadapters, but I noticed that once it was deleted from the list, I chose not to reference the list item anymore (because it no longer exists)

Now suppose I have four dynamically created spinners, all of which have the same ArrayList as their resources. Now I want to use this adapter to get the position of the selected item from one spinner, and then hide it from the other three spinners

for (int i = 0; i < numberOfStops; i++) {
                AddStopView stopView = new AddStopView(getActivity());
                stopView.setCallback(BaseBookingFragment.this);
                stopView.setPassengerNames(extraPassengerNames);
                stopViews.add(stopView);
                parent.addView(stopView,viewPosition);
            }

In the above code, I create stop views dynamically, and each stop view has a passenger name spinner And all of these spinners have the same ArrayList as their assets

AddStopView. A piece of code in Java

public AddStopView(Context context) {
    super(context);
    initialize();
}

public void setCallback(StopViewCallback callback) {
    this.callback = callback;
}

public void setPassengerNames(List<String> passengerNames) {
    this.passengerNames = passengerNames;
    passengerAdapter.setNames(passengerNames);
}

private void initialize() {
    inflate(getContext(),R.layout.view_stop,this);

    passengerAdapter = new ExtraPassengerAdapter(getContext());
    passengerAdapter.setNames(passengerNames);
    nameSpinner.setAdapter(passengerAdapter);
    nameSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent,View view,int position,long id) {
            if (view == null) {
                return;
            }
            passengerName = (String) view.getTag();

            if (position != 0)
                callback.updatePassengerList(AddStopView.this,(position - 1));
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });
}

nameSpinner. Callback code for setonitemselectedlistener

@Override
public void updatePassengerList(AddStopView addStopView,int position) {

    for (String passName : extraPassengerNames) {
        if (addStopView.getpassengerName().equals(passName)) {
            extraPassengerNames.remove(passName);
            break;
        }
    }

    for (AddStopView stopView : stopViews) {
        if (!stopView.equals(addStopView))
            stopView.setPassengerNames(extraPassengerNames);
    }
}

From extrapassengeradapter Java code

public class ExtraPassengerAdapter extends BaseAdapter {
private List<String> names = new ArrayList<>();
private Context context;

public ExtraPassengerAdapter(Context context) {
    this.context = context;
    names.add(get0Position());
}


public void setNames(List<String> names) {
    this.names.clear();
    this.names.add(get0Position());
    this.names.addAll(names);
    notifyDataSetChanged();
}

@Override
public int getCount() {
    return names.size();
}

@Override
public String getItem(int position) {
    return names.get(position);
}

@Override
public long getItemId(int position) {
    return 0;
}

@Override
public View getView(int position,View convertView,ViewGroup parent) {
    TextView textView = (TextView) LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_stop,parent,false);
    String name = getItem(position);
    textView.setText(name);
    textView.setTag(name);
    return textView;
}

private String get0Position() {
    return context.getString(R.string.passenger_name);
}

}

Solution

I think the correct way to solve the problem is to create a list of all possible options and 4 lists of 4 adapters for each spinner After selecting something, update each list according to the logic you describe, and call adapter for each adapter notifyDataSetChanged().