Android：可过滤的文本没有清除

Question

我有自定义的listview，我已经实现了SearchView来过滤数据。当我们为搜索列表视图键入某些东西时，会正确地获取过滤器，但是当我从搜索文本中清除某些字符时，listview不会过滤数据。它在最后的搜索位置保持不变。

让我用截图解释。

在这里，列表尚未过滤。所有项目都存在。 我正在搜索每个项目的两个字段（名称和说明）。

在此屏幕我从cam搜索它显示我正确的结果。

我有明确的文字，直到C和我期待resut应该是两个项目，即摄像头和LED电视。

这里是我的代码。

RateListAdapter.java

public class RateListAdapter extends BaseAdapter implements Filterable { 

Context context; 
private SparseBooleanArray mSelectedItemsIds; 
public ArrayList<RateList> itemRateList; 
public LayoutInflater inflater = null; 
public ArrayList<RateList> tempList; 
CustomFilter filter; 

public RateListAdapter(Context context, ArrayList<RateList> itemRateList) { 
    this.context = context; 
    this.itemRateList = itemRateList; 
    mSelectedItemsIds = new SparseBooleanArray(); 
    this.tempList = itemRateList; 
} 

@Override 
public int getCount() { 
    return itemRateList.size(); 
} 

@Override 
public RateList getItem(int i) { 
    return itemRateList.get(i); 
} 

@Override 
public long getItemId(int i) { 
    return i; 
} 

class Holder { 
    TextView tv_name, tv_description, tv_amount; 
    ImageView iv_itemImage; 
} 

@Override 
public View getView(int i, View convertView, ViewGroup viewGroup) { 

    Holder h = new Holder(); 
    RateList rateList = itemRateList.get(i); 
    inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

    if (convertView == null) { 
     convertView = inflater.inflate(R.layout.rate_list_item, viewGroup, false); 
    } 

    h.tv_name = (TextView) convertView.findViewById(R.id.tv_name); 
    h.tv_description = (TextView) convertView.findViewById(R.id.tv_description); 
    h.tv_amount = (TextView) convertView.findViewById(R.id.tv_amount); 
    h.iv_itemImage = (ImageView) convertView.findViewById(R.id.iv_itemImage); 

    h.tv_name.setText(rateList.Name); 
    h.tv_description.setText(rateList.description); 
    h.tv_amount.setText("₹ "+rateList.amount); 
    Picasso.with(context).load(rateList.image).resize(92,92).into(h.iv_itemImage); 

    return convertView; 
} 

public void toggleSelection(int position) { 
    selectView(position, !mSelectedItemsIds.get(position)); 
} 

public void selectView(int position, boolean value) { 
    if (value) 
     mSelectedItemsIds.put(position, value); 
    else 
     mSelectedItemsIds.delete(position); 
    notifyDataSetChanged(); 
} 

public SparseBooleanArray getSelectedIds() { 
    return mSelectedItemsIds; 
} 

public void removeSelection() { 
    mSelectedItemsIds = new SparseBooleanArray(); 
    notifyDataSetChanged(); 
} 

@Override 
public Filter getFilter() { 
    if(filter == null) 
    { 
     filter=new CustomFilter(); 
    } 
    return filter; 
} 

private class CustomFilter extends Filter { 
    @Override 
    protected FilterResults performFiltering(CharSequence constraint) { 

     FilterResults results=new FilterResults(); 

     if(constraint != null && constraint.length()>0) { 

      constraint=constraint.toString().toLowerCase(); 

      ArrayList<RateList> filters=new ArrayList<RateList>(); 

      for(int i=0;i<itemRateList.size();i++) { 

       if (itemRateList.get(i).Name.toLowerCase().contains(constraint) || 
         itemRateList.get(i).description.toLowerCase().contains(constraint)) { 

        RateList r = new RateList(); 
        r.Name = itemRateList.get(i).Name; 
        r.description= itemRateList.get(i).description; 
        r.id = itemRateList.get(i).id; 
        r.image = itemRateList.get(i).image; 
        r.amount = itemRateList.get(i).amount; 

        filters.add(r); 
       } 
      } 
      results.count = filters.size(); 
      results.values = filters; 
     } else { 
      results.count=itemRateList.size(); 
      results.values=itemRateList; 
     } 
     return results; 
    } 

    @Override 
    protected void publishResults(CharSequence charSequence, FilterResults results) { 
     itemRateList=(ArrayList<RateList>) results.values; 
     notifyDataSetChanged(); 
    } 
} 
} 

的

搜索查看代码BookingFrament.java

searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { 

     @Override 
     public boolean onQueryTextSubmit(String query) { 
      return true; 
     } 

     @Override 
     public boolean onQueryTextChange(String searchQuery) { 
      rateListAdapter.getFilter().filter(searchQuery); 
      return false; 
     } 
    }); 

请帮助。

Answer 1

这是因为要修改的itemRateList

入住此方法：

@Override 
protected void publishResults(CharSequence charSequence, FilterResults results) { 
    itemRateList=(ArrayList<RateList>) results.values; 
    notifyDataSetChanged(); 
} 

我会建议将结果存储在一个单独的ArrayList和使用它在你的适配器类。

由于上述结果在原itemRateList被更新，当被调用时performFiltering方法，以便下一次。你只是迭代前一个结果而不是原始列表。

希望这会有所帮助。