Java 在扩展BaseAdapter的customAdapter中实现getFilter

前提：我是Java和Android的新手，对此我已经搜索了很多，但我不明白如何在代码中实现getFilter

这是主要活动（相关代码）：

如何实现此函数，使其能够在数组中搜索，并在listview中显示过滤后的结果

---

如果您需要任何其他信息，请询问！谢谢

我认为您的适配器应该是这样的。此外，我不建议在getView（）中实例化对象，即typeface对象

 public class ListViewAdapter extends BaseAdapter {
    String title[];
    String description[];
    ArrayList<String> filteredTitleList;
    ArrayList<String> filteredDescripionList;
    Typeface typeface;
    LayoutInflater inflater;

    public ListViewAdapter(Activity context, String[] title, String[] description) {
        super();
        this.context = context;
        this.title = title;
        this.description = description;

        typeface = Typeface.createFromAsset(context.getAssets(),"font/Simple_Print.ttf");

        inflater = context.getLayoutInflater();

        this.filteredTitleList = new ArrayList<String>();
        this.filteredDescripionList = new ArrayList<String>();
        applyFilter(null);
    }

    public void applyFilter(String filter){
        filteredTitleList.clear();
        filteredDescripionList.clear();

        for(int i=0; i < this.title.length; i++){
            String tempTitle = title[i];
            String tempDesc = description[i];

            if(filter == null || filter.equals("")){
                this.filteredTitleList.add(tempTitle);
                this.filteredDescripionList.add(tempDesc);
            }
            else if(tempTitle.toLowerCase().contains(filter.toLowerCase()) || tempDesc.toLowerCase().contains(filter.toLowerCase())){
                this.filteredTitleList.add(tempTitle);
                this.filteredDescripionList.add(tempDesc);
            }

        }
        this.notifyDataSetChanged();
    }

    public int getCount() {
        return filteredTitleList.size();
    }

    public Object getItem(int position) {
        return null;
    }

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

    private class ViewHolder {

        TextView txtViewTitle;
        TextView txtViewDescription;

    }

    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder holder;
        if (convertView == null) {

            convertView = inflater.inflate(R.layout.tabella_prodotti, null);
            holder = new ViewHolder();
            holder.txtViewTitle = (TextView) convertView.findViewById(R.id.titoloProd);
            holder.txtViewDescription = (TextView) convertView.findViewById(R.id.subtitoloProd);

            holder.txtViewDescription.setTypeface(typeface);
            holder.txtViewTitle.setTypeface(typeface);

            convertView.setTag(holder);
        }
        else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.txtViewTitle.setText(this.filteredTitleList.get(position));
        holder.txtViewDescription.setText(this.filteredDescriptionList.get(position));

        return convertView;

     }

    }

公共类ListViewAdapter扩展了BaseAdapter{
字符串标题[]；
字符串描述[]；
ArrayList filteredTitleList；
ArrayList FilteredDescriptionList；
字体；
充气机；
公共ListViewAdapter（活动上下文，字符串[]标题，字符串[]说明）{
超级（）；
this.context=上下文；
this.title=标题；
this.description=描述；
typeface=typeface.createFromAsset（context.getAssets（），“font/Simple_Print.ttf”）；
充气器=context.getLayoutFlater（）；
this.filteredTitleList=新的ArrayList（）；
this.filteredescriptiponList=新的ArrayList（）；
applyFilter（空）；
}
公共无效应用过滤器（字符串过滤器）{
filteredTitleList.clear（）；
FilteredDescriptionList.clear（）；
for（int i=0；i

我找到了一个解决方案并与您共享，我在MainActivity中的inputSearch中添加了addTextChangedListener：

inputSearch.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {

            textLength = inputSearch.getText().length();
            //allProd_sort and allSpec_sort are ArrayList for search
            allProd_sort.clear();
            allSpec_sort.clear();
            String text = inputSearch.getText().toString();

            //allProdString is the String get from ArrayList allProd
            for (int y =0; y<allProdString.length; y++) {

                  //in my case the search works only if there are min 3 characters in search
                 if (textLength <= allProdString[y].length() && textLength >=3) {

                      if (Pattern.compile(Pattern.quote(text), Pattern.CASE_INSENSITIVE)
                                .matcher(allProdString[y]).find()) {

                          allProd_sort.add(allProdString[y]);
                          allSpec_sort.add(allSpecString[y]);
                      }
                  }
               }

               String[] allProdStringSort = allProd_sort.toArray(new String[allProd_sort.size()]);
               String[] allSpecStringSort = allSpec_sort.toArray(new String[allSpec_sort.size()]);

               listView.setAdapter(new ListViewAdapter(MainActivity.this, allProdStringSort, allSpecStringSort));
            }

        @Override
        public void afterTextChanged(Editable editable) {

      }
  });

inputSearch.addTextChangedListener（新的TextWatcher（）{
@凌驾
更改前的公共无效（CharSequence CharSequence，int i，int i2，int i3）{
}
@凌驾
public void onTextChanged（CharSequence CharSequence，int i，int i2，int i3）{
textLength=inputSearch.getText（）.length（）；
//allProd_排序和allSpec_排序是用于搜索的ArrayList
allProd_sort.clear（）；
allSpec_sort.clear（）；
String text=inputSearch.getText（）.toString（）；
//allProdString是从ArrayList allProd获取的字符串
对于（int y=0；yimplement
Filterable
接口。重写getFilter并过滤data@Raghunandan好的。你能给我举个例子吗？让两组数据在搜索时显示过滤后的数据，在没有搜索时显示原始数据。你可以引用这个@Raghunandan，所以我应该创建其他ArrayList并用过滤后的数据填充它data..但是这个新的ArrayList应该在哪里创建？在MainActivity中还是在CustomAdapter中？因为现在在MainActivity中用解析xml填充原始ArrayList这只是一个想法，您可以决定如何实现自定义筛选器
 public class ListViewAdapter extends BaseAdapter {
    String title[];
    String description[];
    ArrayList<String> filteredTitleList;
    ArrayList<String> filteredDescripionList;
    Typeface typeface;
    LayoutInflater inflater;

    public ListViewAdapter(Activity context, String[] title, String[] description) {
        super();
        this.context = context;
        this.title = title;
        this.description = description;

        typeface = Typeface.createFromAsset(context.getAssets(),"font/Simple_Print.ttf");

        inflater = context.getLayoutInflater();

        this.filteredTitleList = new ArrayList<String>();
        this.filteredDescripionList = new ArrayList<String>();
        applyFilter(null);
    }

    public void applyFilter(String filter){
        filteredTitleList.clear();
        filteredDescripionList.clear();

        for(int i=0; i < this.title.length; i++){
            String tempTitle = title[i];
            String tempDesc = description[i];

            if(filter == null || filter.equals("")){
                this.filteredTitleList.add(tempTitle);
                this.filteredDescripionList.add(tempDesc);
            }
            else if(tempTitle.toLowerCase().contains(filter.toLowerCase()) || tempDesc.toLowerCase().contains(filter.toLowerCase())){
                this.filteredTitleList.add(tempTitle);
                this.filteredDescripionList.add(tempDesc);
            }

        }
        this.notifyDataSetChanged();
    }

    public int getCount() {
        return filteredTitleList.size();
    }

    public Object getItem(int position) {
        return null;
    }

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

    private class ViewHolder {

        TextView txtViewTitle;
        TextView txtViewDescription;

    }

    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder holder;
        if (convertView == null) {

            convertView = inflater.inflate(R.layout.tabella_prodotti, null);
            holder = new ViewHolder();
            holder.txtViewTitle = (TextView) convertView.findViewById(R.id.titoloProd);
            holder.txtViewDescription = (TextView) convertView.findViewById(R.id.subtitoloProd);

            holder.txtViewDescription.setTypeface(typeface);
            holder.txtViewTitle.setTypeface(typeface);

            convertView.setTag(holder);
        }
        else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.txtViewTitle.setText(this.filteredTitleList.get(position));
        holder.txtViewDescription.setText(this.filteredDescriptionList.get(position));

        return convertView;

     }

    }

inputSearch.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {

            textLength = inputSearch.getText().length();
            //allProd_sort and allSpec_sort are ArrayList for search
            allProd_sort.clear();
            allSpec_sort.clear();
            String text = inputSearch.getText().toString();

            //allProdString is the String get from ArrayList allProd
            for (int y =0; y<allProdString.length; y++) {

                  //in my case the search works only if there are min 3 characters in search
                 if (textLength <= allProdString[y].length() && textLength >=3) {

                      if (Pattern.compile(Pattern.quote(text), Pattern.CASE_INSENSITIVE)
                                .matcher(allProdString[y]).find()) {

                          allProd_sort.add(allProdString[y]);
                          allSpec_sort.add(allSpecString[y]);
                      }
                  }
               }

               String[] allProdStringSort = allProd_sort.toArray(new String[allProd_sort.size()]);
               String[] allSpecStringSort = allSpec_sort.toArray(new String[allSpec_sort.size()]);

               listView.setAdapter(new ListViewAdapter(MainActivity.this, allProdStringSort, allSpecStringSort));
            }

        @Override
        public void afterTextChanged(Editable editable) {

      }
  });