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:
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();
}
};
}
}
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。
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