如何替换MultiAutoCompleteTextView下拉列表

替换MultiAutoCompleteTextView下拉列表的方法有很多种，这里我将为您提供一种使用自定义适配器的方法。首先，您需要创建一个自定义的适配器来替换默认的下拉列表。以下是一个简单的示例：

创建一个自定义适配器：

public class CustomArrayAdapter extends ArrayAdapter<String> {
    private Context context;
    private int resource;
    private List<String> objects;

    public CustomArrayAdapter(@NonNull Context context, @LayoutRes int resource, @NonNull List<String> objects) {
        super(context, resource, objects);
        this.context = context;
        this.resource = resource;
        this.objects = objects;
    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(resource, parent, false);

        TextView textView = convertView.findViewById(android.R.id.text1);
        textView.setText(objects.get(position));

        return convertView;
    }

    @Override
    public Filter getFilter() {
        return new Filter() {
            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults results = new FilterResults();
                List<String> filteredList = new ArrayList<>();

                if (constraint == null || constraint.length() == 0) {
                    filteredList.addAll(objects);
                } else {
                    String filterPattern = constraint.toString().toLowerCase().trim();

                    for (String item : objects) {
                        if (item.toLowerCase().contains(filterPattern)) {
                            filteredList.add(item);
                        }
                    }
                }

                results.values = filteredList;
                results.count = filteredList.size();
                return results;
            }

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {
                objects.clear();
                objects.addAll((List) results.values);
                notifyDataSetChanged();
            }
        };
    }
}

在您的Activity或Fragment中使用自定义适配器：

List<String> items = new ArrayList<>();
items.add("Item 1");
items.add("Item 2");
items.add("Item 3");

CustomArrayAdapter adapter = new CustomArrayAdapter(this, android.R.layout.simple_dropdown_item_1line, items);

MultiAutoCompleteTextView multiAutoCompleteTextView = findViewById(R.id.multiAutoCompleteTextView);
multiAutoCompleteTextView.setAdapter(adapter);

现在，您的MultiAutoCompleteTextView下拉列表将使用自定义适配器进行显示。您可以根据需要自定义适配器的样式和过滤逻辑。