android通过拼音搜索中文的功能实现代码

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>

 
  
 
  
 

public class SearchAdapter extends RecyclerView.Adapter implements Filterable {
 
  private Context context;
  private List list;
  //保存原有的数据
  private List originalList;
 
  private OnItemListener onItemListener;
  void setOnItemListener(OnItemListener onItemListener){
    this.OnItemListener= onItemListener;
  }
 
  private SearchFilter filter;
 
  SearchAdapter(Context context,List list){
    this.cOntext=context;
    this.list = list;
    originalList = list;
  }
 
  @NonNull
  @Override
  public SearchAdapter.MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(context).inflate(R.layout.item_rv_search,parent,false);
    return new MyViewHolder(view);
  }
 
  @Override
  public void onBindViewHolder(@NonNull SearchAdapter.MyViewHolder holder, final int position) {
    holder.tvName.setText(list.get(position));
    holder.itemView.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        if (onItemListener!=null){
          onItemListener.onItem(list.get(position));
        }
      }
    });
  }
 
  @Override
  public int getItemCount() {
    return list==null&＃63;0:list.size();
  }
 
  @Override
  public Filter getFilter() {
    if (filter==null){
      filter = new SearchFilter();
    }
    return filter;
  }
 
  class MyViewHolder extends RecyclerView.ViewHolder{
    private TextView tvName;
    MyViewHolder(@NonNull View itemView) {
      super(itemView);
      tvName = itemView.findViewById(R.id.tvName);
    }
  }
 
  interface OnItemListener{
    void onItem(String name);
  }
 
 
  class SearchFilter extends Filter{
 
    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
      //输入框传来的数据 constraint
 
      //用于保存过滤的结果
      FilterResults filterResults = new FilterResults();
 
      if (cOnstraint==null || constraint.length()==0){
        filterResults.values = originalList;
        filterResults.count = originalList.size();
      }else {
        List fList = new ArrayList<>();
        String cOns= constraint.toString().trim().toLowerCase();
        for (String s : originalList) {
          //从首位开始匹配
          if (s.startsWith(cons)){
            fList.add(s);
          }
        }
        filterResults.values = fList;
        filterResults.count = fList.size();
      }
 
      return filterResults;
    }
 
    @Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
      list = (List) results.values;
      notifyDataSetChanged();
    }
  }

}

 private RecyclerView recyclerView;
  private SearchAdapter adapter;
  private List list;
 
  private EditText etSearchName;
 
  public static final String[] str = new String[]{
      "陈天丽","黄正","徐明"
      ,"李自成","林子祥","周星星"
      ,"周润发","林星辰","林青霞"
      ,"李赛凤","刘德华","胡歌"
      ,"霍建华","林心如","赵薇"
      ,"赵四","赵本山","郭德纲"
  };
 
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
 
    etSearchName = findViewById(R.id.etSearchName);
    recyclerView = findViewById(R.id.recyclerView);
 
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
 
    list = new ArrayList<>();
    list.addAll(Arrays.asList(str));
 
    adapter = new SearchAdapter(this,list);
    recyclerView.setAdapter(adapter);
    adapter.setOnItemListener(new SearchAdapter.OnItemListener() {
      @Override
      public void onItem(String name) {
        etSearchName.setText(name);
      }
    });
 
    etSearchName.addTextChangedListener(new TextWatcher() {
      @Override
      public void beforeTextChanged(CharSequence s, int start, int count, int     
   after) {
 
      }
 
      @Override
      public void onTextChanged(CharSequence s, int start, int before, int count) {
        adapter.getFilter().filter(etSearchName.getText().toString().trim());
      }
 
      @Override
      public void afterTextChanged(Editable s) {
 
      }
    });
 
  }

 HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();
    format.setToneType(HanyuPinyinToneType.WITHOUT_TONE);//不显示音标
    format.setVCharType(HanyuPinyinVCharType.WITH_V);//“ü”输出V
    format.setCaseType(HanyuPinyinCaseType.LOWERCASE);//拼音输出小写
    userNameList = new ArrayList<>();
    for (String name : list) {
      StringBuffer stringBuffer = new StringBuffer();
      for (int j=0;j

 List fList = new ArrayList<>();
        String cOns= constraint.toString().trim().toLowerCase();
        for (UserName userName : originalList) {
          //从首位开始匹配
          if (userName.getPinyin().startsWith(cons)){
            fList.add(userName);
          }
        }
        filterResults.values = fList;
        filterResults.count = fList.size();