使用getFilter函数时,ListView为空白

我想实现getFilter()我的功能ListView,但每次我输入的东西EditText我ListView就会消失.

我的SetHelpRows档案:

public class SetHelpRows {
    String name;
    String id;

    public String getName () {
        return name;
    }

    public void setName (String name) {
        this.name = name;
    }

    public String getID () {
        return id;
    }

    public void setID (String id) {
        this.id = id;
    }

    public SetHelpRows(String name, String id) {
        super();
        this.name = name;
        this.id = id;
    }
}

我的SetHelpRowsCustomAdapter档案:

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.ImageView;
import android.widget.TextView;

public class SetRowsCustomAdapter extends ArrayAdapter {
    Context context;
   int layoutResourceId;
   ArrayList data=new ArrayList();
   private ArrayList original;
   private ArrayList fitems;
   private Filter filter;


   public SetRowsCustomAdapter(Context context, int layoutResourceId, ArrayList data) {
       super(context, layoutResourceId, data);
       this.layoutResourceId = layoutResourceId;
       this.context = context;
       this.data = data;

       this.original = data;//new ArrayList();
       this.fitems = data;//new ArrayList();
   }

   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
       View row = convertView;
       ImageHolder holder = null;

       if(row == null)
       {
           LayoutInflater inflater = ((Activity)context).getLayoutInflater();
           row = inflater.inflate(layoutResourceId, parent, false);

           holder = new ImageHolder();
           holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle);
           holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon);
           holder.txtID = (TextView)row.findViewById(R.id.txtModDate);
           row.setTag(holder);
       }
       else
       {
           holder = (ImageHolder)row.getTag();
       }

       SetRows myImage = data.get(position);
       holder.txtTitle.setText(myImage.name);
       holder.txtID.setText(myImage.id);
       int outImage=myImage.image;
       holder.imgIcon.setImageResource(outImage);
      return row;

   }

   static class ImageHolder
   {
       ImageView imgIcon;
       TextView txtTitle;
       TextView txtID;
   }

   @Override
   public Filter getFilter()
   {
       if (filter == null) {
           Log.i("Before Filter", "Before Filter");
           filter = new PkmnNameFilter();
       }

       return filter;
   }

   private class PkmnNameFilter extends Filter
   {
           @Override
           protected FilterResults performFiltering(CharSequence constraint)
           {   
               FilterResults results = new FilterResults();
               String prefix = constraint.toString().toLowerCase();

               if (prefix == null || prefix.length() == 0)
               {
                   Log.i("prefix is null or 0", "prefix is null or 0");
                   ArrayList list = new ArrayList(original);
                   results.values = list;
                   results.count = list.size();
               }
               else
               {
                   Log.i("prefix is !null or !0", "prefix is !null or !0");
                   final ArrayList list = new ArrayList(original);
                   final ArrayList nlist = new ArrayList();
                   int count = list.size();

                   for (int i=0; i)results.values;

               clear();
               int count = fitems.size();
               for (int i=0; i

我的部分MainActivity档案:

inputSearch = (EditText) findViewById(R.id.etSearch);
dataList = (ListView) findViewById(R.id.lvFiles);
for (int y=0; y

在LogCat我看到以下内容:

12-12 12:15:57.077: I/Before Filter(720): Before Filter
12-12 12:15:57.106: I/prefix is !null or !0(720): prefix is !null or !0
12-12 12:15:57.216: I/publish result(720): publish result

    

  




  
  
  

    

      

        Si8..
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我修改了我的代码并且能够让它运行起来.如果有人想使用它,请成为我的客人:)

SetRows Java文件:

public class SetRows {
    int image;
    String name;
    String id;

    public int getImage () {
        return image;
    }

    public void setImage (int image) {
        this.image = image;
    }

    public String getName () {
        return name;
    }

    public void setName (String name) {
        this.name = name;
    }

    public String getID () {
        return id;
    }

    public void setID (String id) {
        this.id = id;
    }

    public SetRows(int image, String name, String id) {
        super();
        this.image = image;
        this.name = name;
        this.id = id;
    }

    @Override
    public String toString() {
        return  image + " " + name + " " + id;
    }
}


SetRowsCustomAdapter Java文件:

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.ImageView;
import android.widget.TextView;

public class SetRowsCustomAdapter extends ArrayAdapter {
    Context context;
   int layoutResourceId;
   ArrayList data=new ArrayList(); //data = countryList
   private ArrayList originalList;
   private NameFilter filter;

   public SetRowsCustomAdapter(Context context, int layoutResourceId, ArrayList data) {
       super(context, layoutResourceId, data);
       this.layoutResourceId = layoutResourceId;
       this.context = context;

       this.data = data;
       //this.data.addAll(data);

       this.originalList = new ArrayList();
       this.originalList.addAll(data);
   }

   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
       View row = convertView;
       ImageHolder holder = null;

       if(row == null)
       {
           LayoutInflater inflater = ((Activity)context).getLayoutInflater();
           row = inflater.inflate(layoutResourceId, parent, false);

           holder = new ImageHolder();
           holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle);
           holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon);
           holder.txtID = (TextView)row.findViewById(R.id.txtModDate);
           row.setTag(holder);
       }
       else
       {
           holder = (ImageHolder)row.getTag();
       }

       SetRows myImage = data.get(position);
       holder.txtTitle.setText(myImage.name);
       holder.txtID.setText(myImage.id);
       int outImage=myImage.image;
       holder.imgIcon.setImageResource(outImage);
      return row;

   }

   static class ImageHolder
   {
       ImageView imgIcon;
       TextView txtTitle;
       TextView txtID;
   }
   @Override
   public Filter getFilter() {
    if (filter == null){
     filter  = new NameFilter();
    }
    return filter;
   }
   private class NameFilter extends Filter
   {

    @Override
    protected FilterResults performFiltering(CharSequence constraint) {

     constraint = constraint.toString().toLowerCase();
     FilterResults result = new FilterResults();
     if(constraint != null && constraint.toString().length() > 0)
     {
     ArrayList filteredItems = new ArrayList();

     for(int i = 0, l = originalList.size(); i < l; i++)
     {
      SetRows nameList = originalList.get(i);
      if(nameList.toString().toLowerCase().contains(constraint))
       filteredItems.add(nameList);
     }
     result.count = filteredItems.size();
     result.values = filteredItems;
     }
     else
     {
      synchronized(this)
      {
       result.values = originalList;
       result.count = originalList.size();
      }
     }
     return result;
    }

    @SuppressWarnings("unchecked")
    @Override
    protected void publishResults(CharSequence constraint,
      FilterResults results) {

     data = (ArrayList)results.values;
     notifyDataSetChanged();
     clear();
     for(int i = 0, l = data.size(); i < l; i++)
      add(data.get(i));
     notifyDataSetInvalidated();
    }
   }
}


其他一切都保持不变:)

我希望人们发现它对自己的应用程序有用.