如何让Android选择框支持模糊搜索

要让Android选择框支持模糊搜索，可以通过自定义适配器来实现。下面是一个简单的示例代码：

1. 首先，创建一个自定义的适配器类，继承自BaseAdapter，并实现Filterable接口：

public class CustomAdapter extends BaseAdapter implements Filterable {     private List<String> originalList;     private List<String> filteredList;     private Context context;      public CustomAdapter(List<String> originalList, Context context) {         this.originalList = originalList;         this.filteredList = originalList;         this.context = context;     }      @Override     public int getCount() {         return filteredList.size();     }      @Override     public Object getItem(int position) {         return filteredList.get(position);     }      @Override     public long getItemId(int position) {         return position;     }      @Override     public View getView(int position, View convertView, ViewGroup parent) {         TextView textView = new TextView(context);         textView.setText(filteredList.get(position));         return textView;     }      @Override     public Filter getFilter() {         return new Filter() {             @Override             protected FilterResults performFiltering(CharSequence constraint) {                 FilterResults results = new FilterResults();                 List<String> filteredValues = new ArrayList<>();                  for (String value : originalList) {                     if (value.toLowerCase().contains(constraint.toString().toLowerCase())) {                         filteredValues.add(value);                     }                 }                  results.values = filteredValues;                 results.count = filteredValues.size();                 return results;             }              @Override             protected void publishResults(CharSequence constraint, FilterResults results) {                 filteredList = (List<String>) results.values;                 notifyDataSetChanged();             }         };     } } 

2. 在Activity或Fragment中使用自定义适配器类：

List<String> dataList = new ArrayList<>(); // 添加数据到dataList中  AutoCompleteTextView autoCompleteTextView = findViewById(R.id.autoCompleteTextView); CustomAdapter adapter = new CustomAdapter(dataList, this); autoCompleteTextView.setAdapter(adapter); 

通过以上步骤，就可以让Android选择框支持模糊搜索了。用户在输入框中输入关键词时，选择框会自动筛选出包含该关键词的选项并显示出来。