1q1

public class SpinnerAdapter extends BaseAdapter {

    private List<String> items;
    private LayoutInflater inflater;
    private ItemClickListener clickListener;

    public SpinnerAdapter(Context context, List<String> items, ItemClickListener clickListener){
        inflater = LayoutInflater.from(context);
        this.items = items;
        this.clickListener = clickListener;
    }

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

    @Override
    public Object getItem(int position) {
        return items.get(position);
    }

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

    public View getView(int position, View convertView, ViewGroup parent) {
        if(convertView == null) {
            convertView = inflater.inflate(R.layout.spinner_item, parent, false);
        }
        ((TextView)convertView).setText(items.get(position));
        convertView.setTag(position);
        convertView.setClickable(false);
        convertView.setLongClickable(false);
        
        return convertView;
    }


    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        convertView = getView(position, convertView, parent);
        convertView.setTag(position);

        convertView.setOnClickListener(v -> {
            if (clickListener != null) {
                clickListener.onItemClicked(v);
            }
        });

        convertView.setOnLongClickListener(v -> {
            if (clickListener != null) {
                clickListener.onItemLongClicked(v);
            }
            return true;
        });

        return convertView;
    }
}

public interface ItemClickListener {
    void onItemLongClicked(View view);
    void onItemClicked(View view);
}

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_activity);
        List<String> strings = new ArrayList<String>(){{
            add("John");
            add("James");
            add("Jake");
            add("Jane");
        }};

        CustomSpinner spinner = findViewById(R.id.spinner);

        spinner.setAdapter(new SpinnerAdapter(this, strings, new ItemClickListener() {
            @Override
            public void onItemLongClicked(View view) {
                spinner.onDetachedFromWindow();
                final int pos = (int) view.getTag();
                spinner.setSelection(pos);
                Toast.makeText(MainActivity.this, "regular click: "+strings.get(pos), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onItemClicked(View view) {
                spinner.onDetachedFromWindow();
                final int pos = (int) view.getTag();
                spinner.setSelection(pos);
                Toast.makeText(MainActivity.this, "long click: "+strings.get(pos), Toast.LENGTH_SHORT).show();
            }

        }));
    }
}

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_marginTop="10dp"
    android:layout_marginBottom="10dp"
    android:layout_height="wrap_content">
</TextView>