Java 在android中的listview自定义适配器中使用筛选器类
我正在android中为listview使用自定义适配器。我在其中创建了一个过滤器类Java 在android中的listview自定义适配器中使用筛选器类,java,android,Java,Android,我正在android中为listview使用自定义适配器。我在其中创建了一个过滤器类 public class filter_here extends Filter{ //ArrayList<String> Names=new ArrayList<String>(); ArrayList<String> store_names; @Override protected FilterResults
public class filter_here extends Filter{
//ArrayList<String> Names=new ArrayList<String>();
ArrayList<String> store_names;
@Override
protected FilterResults performFiltering(CharSequence constraint) {
// TODO Auto-generated method stub
store_names=new ArrayList<String>();
for(int i=0;i<store_list.size();i++)
{
store_names.add(store_list.get(i).store_name);
}
FilterResults Result = new FilterResults();
// if constraint is empty return the original names
if(constraint.length() == 0 ){
Result.values = store_names;
Result.count = store_names.size();
return Result;
}
ArrayList<String> Filtered_Names = new ArrayList<String>();
String filterString = constraint.toString().toLowerCase();
String filterableString;
for(int i = 0; i<store_list.size(); i++){
filterableString = store_list.get(i).store_name;
if(filterableString.toLowerCase().contains(filterString)){
Filtered_Names.add(filterableString);
}
}
Result.values = Filtered_Names;
Result.count = Filtered_Names.size();
return Result;
}
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
// TODO Auto-generated method stub
store_names = (ArrayList<String>) results.values;
notifyDataSetChanged();
}
}
仍然不起作用。您是否为EditText实现了TextWatcher listenr？也发布日志文件以便更容易理解问题更改此行“store_names=ArrayList results.values；”“存储\u list=ArrayList results.values；”@bean\u droid store\u list是ArrayList，store\u names是ArrayList。我正在将store\u list这是store\u数据对象的ArrayList传递到适配器中。为什么不使用已经实现可过滤iface的现有适配器？
package com.igloo.adapters;
import java.io.InputStream;
import java.text.NumberFormat;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import com.androidquery.AQuery;
import com.igloo.adapters.CustomStoreAdapter.StoreHolder;
import com.igloo.classes.Store_data;
import com.igloo.storelocater.R;
import com.igloo.storelocater.StoreFinal;
import android.app.Activity;
import android.content.Intent;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.DocumentsContract.Document;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class CustomDetailsAdapter extends BaseAdapter implements Filterable {
private Activity context;
private LayoutInflater details_inflate;
ArrayList<Store_data> store_list;
AQuery androidQuery;
String URL_image="http://footballultimate.com/storelocator/resource/uploads/";
double current_latitude,current_longitude;
float[] result_arr;
filter_here filter;
public CustomDetailsAdapter(Activity context,ArrayList<Store_data> store_list,double current_latitude,double current_longitude)
{
this.context=context;
details_inflate=LayoutInflater.from(context);
this.store_list=store_list;
this.current_latitude=current_latitude;
this.current_longitude=current_longitude;
filter = new filter_here();
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return this.store_list.size();
}
@Override
public Object getItem(int index) {
// TODO Auto-generated method stub
return store_list.get(index);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
DetailsHolder holder;
if(convertView==null)
{
convertView = details_inflate.inflate(R.layout.list_store_names_single, null);
holder=new DetailsHolder();
holder.txt_store_specific_name = (TextView) convertView.findViewById(R.id.txt_store_names);
holder.root_store_name_layout = (RelativeLayout) convertView.findViewById(R.id.root_store_names_layout);
holder.store_name=(ImageView) convertView.findViewById(R.id.iv_store_name);
holder.priority_star=(ImageView) convertView.findViewById(R.id.iv_star);
holder.txt_distance=(TextView) convertView.findViewById(R.id.txt_store_distance);
convertView.setTag(holder);
}
else
{
holder = (DetailsHolder) convertView.getTag();
}
androidQuery=new AQuery(context);
holder.txt_store_specific_name.setText(store_list.get(position).store_name);
holder.root_store_name_layout.setTag(store_list.get(position));
androidQuery.id(holder.store_name).image(URL_image+store_list.get(position).store_image);
//String parameter=""+distance(current_latitude,current_longitude,Double.parseDouble(store_list.get(position).store_latitude),Double.parseDouble(store_list.get(position).store_longitude),'K');
//parameter=parameter.substring(0,parameter.length()-1);
//holder.txt_distance.setText(parameter+" km");
result_arr=new float[1];
Location.distanceBetween(current_latitude, current_longitude, Double.parseDouble(store_list.get(position).store_latitude), Double.parseDouble(store_list.get(position).store_longitude), result_arr);
Float f=new Float((result_arr[0]*0.001f));
Double d=new Double(Float.toString(f));
NumberFormat number = NumberFormat.getNumberInstance();
number.setMaximumFractionDigits(3);
String snum=number.format(d);
holder.txt_distance.setText(snum+" km");
if(store_list.get(position).store_priority.equals("yes"))
{
//holder.priority_star.setLayoutParams(new RelativeLayout.LayoutParams(50,50));
holder.priority_star.setImageResource(R.drawable.yes);
}
else if(store_list.get(position).store_priority.equals("no"))
{
holder.priority_star.setImageResource(android.R.color.transparent);
//holder.priority_star.setLayoutParams(new RelativeLayout.LayoutParams(0,0));
}
holder.root_store_name_layout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Store_data item=(Store_data)((RelativeLayout)v).getTag();
Bundle b=new Bundle();
b.putSerializable("store_details",item);
Intent i=new Intent(context,StoreFinal.class);
i.putExtras(b);
context.startActivity(i);
}
});
return convertView;
}
static class DetailsHolder {
TextView txt_store_specific_name;
RelativeLayout root_store_name_layout;
ImageView store_name;
TextView txt_distance;
ImageView priority_star;
}
//public String getDistance(double lat1, double lon1, double lat2, double lon2) {
// String result_in_kms = "";
// String url = "http://maps.google.com/maps/api/directions/xml?origin=" + lat1 + "," + lon1 + "&destination=" + lat2 + "," + lon2 + "&sensor=false&units=metric";
// String tag[] = {"text"};
// HttpResponse response = null;
// try {
// HttpClient httpClient = new DefaultHttpClient();
// HttpContext localContext = new BasicHttpContext();
// HttpPost httpPost = new HttpPost(url);
// response = httpClient.execute(httpPost, localContext);
// InputStream is = response.getEntity().getContent();
// DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
// org.w3c.dom.Document doc = builder.parse(is);
// if (doc != null) {
// NodeList nl;
// ArrayList args = new ArrayList();
// for (String s : tag) {
// nl = doc.getElementsByTagName(s);
// if (nl.getLength() > 0) {
// Node node = nl.item(nl.getLength() - 1);
// args.add(node.getTextContent());
// } else {
// args.add(" - ");
// }
// }
// result_in_kms =String.valueOf( args.get(0));
// }
// } catch (Exception e) {
// e.printStackTrace();
// }
// //Float f=Float.valueOf(result_in_kms);
// return result_in_kms;
// android.location.Location homeLocation = new android.location.Location("");
// homeLocation .setLatitude(lat1);
// homeLocation .setLongitude(lon1);
//
// android.location.Location targetLocation = new android.location.Location("");
// targetLocation .setLatitude(lat2);
// targetLocation .setLongitude(lon2);
//
// float distanceInMeters = targetLocation.distanceTo(homeLocation);
// return String.valueOf((distanceInMeters*0.001));
//}
// private double distance(double lat1, double lon1, double lat2, double lon2, char unit) {
// double theta = lon1 - lon2;
// double dist = Math.sin(deg2rad(lat1)) * Math.sin(deg2rad(lat2)) + Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * Math.cos(deg2rad(theta));
// dist = Math.acos(dist);
// dist = rad2deg(dist);
// dist = dist * 60 * 1.1515;
// if (unit == 'K') {
// dist = dist * 1.609344;
// } else if (unit == 'N') {
// dist = dist * 0.8684;
// }
// return (dist);
// }
//
// /*:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
// /*:: This function converts decimal degrees to radians :*/
// /*:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
// private double deg2rad(double deg) {
// return (deg * Math.PI / 180.0);
// }
//
// /*:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
// /*:: This function converts radians to decimal degrees :*/
// /*:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
// private double rad2deg(double rad) {
// return (rad * 180.0 / Math.PI);
// }
@Override
public Filter getFilter() {
return filter;
}
public class filter_here extends Filter{
//ArrayList<String> Names=new ArrayList<String>();
ArrayList<String> store_names;
@Override
protected FilterResults performFiltering(CharSequence constraint) {
// TODO Auto-generated method stub
store_names=new ArrayList<String>();
for(int i=0;i<store_list.size();i++)
{
store_names.add(store_list.get(i).store_name);
}
FilterResults Result = new FilterResults();
// if constraint is empty return the original names
if(constraint.length() == 0 ){
Result.values = store_names;
Result.count = store_names.size();
return Result;
}
ArrayList<String> Filtered_Names = new ArrayList<String>();
String filterString = constraint.toString().toLowerCase();
String filterableString;
for(int i = 0; i<store_list.size(); i++){
filterableString = store_list.get(i).store_name;
if(filterableString.toLowerCase().contains(filterString)){
Filtered_Names.add(filterableString);
}
}
Result.values = Filtered_Names;
Result.count = Filtered_Names.size();
return Result;
}
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
// TODO Auto-generated method stub
store_names = (ArrayList<String>) results.values;
notifyDataSetChanged();
}
}
}
txtsearcher.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
StoreDetails.this.cdadp.getFilter().filter(s);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
public class filter_here extends Filter{
//ArrayList<String> Names=new ArrayList<String>();
//ArrayList<Store_data> store_list;
@Override
protected FilterResults performFiltering(CharSequence constraint) {
// TODO Auto-generated method stub
//store_list=new ArrayList<Store_data>();
// for(int i=0;i<store_list.size();i++)
// {
// store_names.add(store_list.get(i).store_name);
// }
FilterResults Result = new FilterResults();
// if constraint is empty return the original names
if(constraint.length() == 0 ){
Result.values = store_list;
Result.count = store_list.size();
return Result;
}
ArrayList<Store_data> Filtered_Names = new ArrayList<Store_data>();
String filterString = constraint.toString().toLowerCase();
String filterableString;
for(int i = 0; i<store_list.size(); i++){
filterableString = store_list.get(i).store_name.toString();
if(filterableString.toLowerCase().contains(filterString)){
Filtered_Names.add(store_list.get(i));
}
}
Result.values = Filtered_Names;
Result.count = Filtered_Names.size();
return Result;
}
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
// TODO Auto-generated method stub
store_list = (ArrayList<Store_data>) results.values;
notifyDataSetChanged();
}
}