进度对话框持续显示 [英] progress dialog keeps on displaying
本文介绍了进度对话框持续显示的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在android中编写了很长的代码，当餐厅列表加载到listview中时，它会显示一个进度对话框.现在的问题是，当再次在用户过滤器列表上加载餐厅列表时(仅在第一次)，它的工作正常.即使填充了列表视图，并且用户必须按设备的后退按钮手动将其关闭，它仍会继续显示.在这种情况下，我不知道在哪里写pg.dismiss().在这里发布我的代码.请告诉我.
I have written a long code in android and which displays a progress dialog when the restaurant list is loaded into the listview. Now the problem is that its working fine when restaurant list is loaded again on users filter changes but only at the first time. it just keeps on displaying even if the listview is populated and user has to manually dismiss it pressing the back button of deivce. I dont knw where to write pg.dismiss() in this case. Posting my code here . plz advise me..
package com.Refinedymapps;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.location.Geocoder;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class Restaurantlist extends Activity implements OnClickListener, OnItemSelectedListener {
ProgressDialog pg;
private ImageButton imgbtn;
private ListView restaurant;
private TextView city;
String sendid,flagdopost="",linkurl;
LocationManager locationManger;
Geocoder gc;
Bundle bundle;
private int j=0;
private Spinner cuisine,area;
static ArrayList<HashMap<String,String>> customlist= new ArrayList<HashMap<String,String>>();
private String asynctaskflag="",cuisineval,areaval;
List<String> tempareanamelist,tempcuisinenamelist,areanamelist,cuisinelist,cuisineidlist,restaurantnames,areanames,restaurantidlist,originalcuisinelist,originalarealist;
String str,coun,stat,cid,sid,cityid,cityname;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.restaurantlisting);
linkurl=getResources().getString(R.string.linkurl);
city=(TextView)findViewById(R.id.textviewcity);
cuisine=(Spinner)findViewById(R.id.spncuisine);
area=(Spinner)findViewById(R.id.spnarea);
restaurant=(ListView)findViewById(R.id.lstrestaurant);
imgbtn=(ImageButton)findViewById(R.id.imageButton1);
bundle = this.getIntent().getExtras();
imgbtn.setImageResource(R.drawable.searchloc);
asynctaskflag="init";
new Thetask().execute(asynctaskflag,null,null);
imgbtn.setOnClickListener(new OnClickListener(){
public void onClick(View arg0) {
Intent newlocintent=new Intent(Restaurantlist.this,Restaurantlistdisplay.class);
startActivity(newlocintent);
}
});
restaurant.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
Toast.makeText(getBaseContext(), "resname"+restaurantnames.get(arg2)+"areaname"+areanames.get(arg2), 10).show();
String[] getid={"itemclick",restaurantnames.get(arg2),areanames.get(arg2)};
new Thetask().execute(getid);
}
});
}
public void populateReslist()
{
Log.i("inside populatereslist","value of j is:"+j);
for(int i=0;i<restaurantnames.size();i++)
{
HashMap<String,String> temp = new HashMap<String,String>();
temp.put("Restaurant Name",restaurantnames.get(i).toString());
temp.put("Area Name", areanames.get(i).toString());
customlist.add(temp);
}
}
public List<String> getAreanames(String cityid)
{
String list = null;
areanamelist=new ArrayList<String>();
final HttpClient client=new DefaultHttpClient();
final HttpGet req=new HttpGet(linkurl+"/ymaws/resources/restaurant/"+cityid+"/areas/");
HttpResponse httpResponse;
try {
httpResponse=client.execute(req);
HttpEntity entity = httpResponse.getEntity();
Log.i("entity", entity.toString());
if (entity != null)
{
InputStream instream = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
StringBuilder sb = new StringBuilder();
String line = null;
try
{
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
try
{
instream.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
// Closing the input stream will trigger connection release
list= sb.toString();
Log.i("areaname xml is", list.toString());
}
}
catch(Exception e)
{
}
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
try
{
DocumentBuilder builder = factory.newDocumentBuilder();
Document dom = builder.parse(new InputSource(new StringReader(list)));
Element root = dom.getDocumentElement();
NodeList items = root.getElementsByTagName("Area");
for (int i=0;i<items.getLength();i++)
{
Node item = items.item(i);
NodeList properties = item.getChildNodes();
for (int j=0;j<properties.getLength();j++)
{
Node property = properties.item(j);
String name = property.getNodeName();
if (name.equalsIgnoreCase("areaName"))
{
areanamelist.add(property.getFirstChild().getNodeValue());
}
else
{
}
}
}
//Log.i("areaname list in getAreas method", areanamelist.toString());
return areanamelist;
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
public List<String> getCuisines(String cityid)
{
String list = null;
cuisinelist=new ArrayList<String>();
cuisineidlist=new ArrayList<String>();
final HttpClient client=new DefaultHttpClient();
final HttpGet req=new HttpGet(linkurl+"/ymaws/resources/restaurant/"+cityid+"/cuisines/");
HttpResponse httpResponse;
try {
httpResponse=client.execute(req);
HttpEntity entity = httpResponse.getEntity();
Log.i("entity", entity.toString());
if (entity != null)
{
InputStream instream = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
StringBuilder sb = new StringBuilder();
String line = null;
try
{
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
try
{
instream.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
// Closing the input stream will trigger connection release
list= sb.toString();
Log.i("cuisinename xml is", list.toString());
}
}
catch(Exception e)
{
}
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
try
{
DocumentBuilder builder = factory.newDocumentBuilder();
Document dom = builder.parse(new InputSource(new StringReader(list)));
Element root = dom.getDocumentElement();
NodeList items = root.getElementsByTagName("Cuisine");
for (int i=0;i<items.getLength();i++)
{
Node item = items.item(i);
NodeList properties = item.getChildNodes();
for (int j=0;j<properties.getLength();j++)
{
Node property = properties.item(j);
String name = property.getNodeName();
if (name.equalsIgnoreCase("cuisineName"))
{
cuisinelist.add(property.getFirstChild().getNodeValue());
}
else if(name.equalsIgnoreCase("cuisineId"))
{
cuisineidlist.add(property.getFirstChild().getNodeValue());
}
}
}
Log.i("getcuisine cuisinelist",cuisinelist.toString());
return cuisinelist;
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
public void firequery()
{
String url = null;
if(cuisineval=="*" && areaval=="*")
{
url=linkurl+"/ymaws/resources/restaurant/"+cityid+"/restaurants";
}
else if(cuisineval!="*" && areaval=="*")
{
for(int i=0;i<originalcuisinelist.size();i++)
{
Log.i("cuisinelist original item is",""+originalcuisinelist.get(i));
Log.i("cuisineidlist is",cuisineidlist.toString());
if((cuisine.getSelectedItem().toString()).equalsIgnoreCase(originalcuisinelist.get(i).toString()))
{
Log.i("cuisineid selected is",""+cuisineidlist.get(i));
url=linkurl+"/ymaws/resources/restaurant?cityid="+cityid+"&cuisineid="+cuisineidlist.get(i);
}
}
}
else if(cuisineval=="*" && areaval!="*")
{
url = linkurl+"/ymaws/resources/restaurant?cityid="+cityid+"&areanm="+area.getSelectedItem().toString();
}
else
{
for(int i=0;i<originalcuisinelist.size();i++)
{
if((cuisine.getSelectedItem().toString()).equalsIgnoreCase(originalcuisinelist.get(i).toString()))
{
url=linkurl+"/ymaws/resources/restaurant?cityid="+cityid+"&cuisineid="+cuisineidlist.get(i)+"&areanm="+area.getSelectedItem().toString();
}
}
}
getResult(url);
}
public void getResult(String url)
{
String list = null;
restaurantnames=new ArrayList<String> ();
areanames=new ArrayList<String>();
restaurantidlist=new ArrayList<String>();
final HttpClient client=new DefaultHttpClient();
Log.i("url is","url:"+url.toString());
final HttpGet req=new HttpGet(url.replaceAll(" ", "%20"));
HttpResponse httpResponse;
try {
httpResponse=client.execute(req);
HttpEntity entity = httpResponse.getEntity();
Log.i("entity", entity.toString());
if (entity != null)
{
InputStream instream = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
StringBuilder sb = new StringBuilder();
String line = null;
try
{
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
try
{
instream.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
list= sb.toString();
Log.i("list xml is", list.toString());
}
}
catch(Exception e)
{
}
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
try
{
if(list!=null)
{
DocumentBuilder builder = factory.newDocumentBuilder();
Document dom = builder.parse(new InputSource(new StringReader(list)));
Element root = dom.getDocumentElement();
NodeList items = root.getElementsByTagName("resLovData");
for (int i=0;i<items.getLength();i++)
{
Node item = items.item(i);
NodeList properties = item.getChildNodes();
for (int j=0;j<properties.getLength();j++)
{
Node property = properties.item(j);
String name = property.getNodeName();
if (name.equalsIgnoreCase("locName"))
{
restaurantnames.add(property.getFirstChild().getNodeValue());
}
else if(name.equalsIgnoreCase("areaName"))
{
areanames.add(property.getFirstChild().getNodeValue());
}
else if(name.equalsIgnoreCase("locId"))
{
restaurantidlist.add(property.getFirstChild().getNodeValue());
}
}
}
}
else
{
}
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
public void onClick(View arg0) {
// TODO Auto-generated method stub
}
public class Thetask extends AsyncTask<String, Void, Void>
{
String x,y;
@Override
public void onPreExecute()
{
pg =new ProgressDialog(Restaurantlist.this);
pg.setMessage("fetching info....");
pg.setIndeterminate(true);
pg.setCancelable(true);
Log.i("inside preexecute","in pre execute");
pg.show();
}
public Void doInBackground(String... params)
{
if(params[0].equalsIgnoreCase("init"))
{
Log.i("inside doinbackground 1st",flagdopost);
cid=bundle.getString("cid");
sid=bundle.getString("sid");
cityid=bundle.getString("cityid");
cityname=bundle.getString("cityname");
originalcuisinelist=new ArrayList<String>();
originalcuisinelist=getCuisines(cityid);
tempcuisinenamelist = getCuisines(cityid);
tempcuisinenamelist.add(0,"All");
originalarealist=new ArrayList<String>();
originalarealist=getAreanames(cityid);
tempareanamelist=getAreanames(cityid);
tempareanamelist.add(0,"All");
Log.i("area are",tempareanamelist.toString());
flagdopost="init";
Log.i("inside doinbackground 1st",flagdopost);
}
else if(params[0].equalsIgnoreCase(""))
{
flagdopost="";
j++;
if(j!=1)
{
firequery();
flagdopost="itemselected";
Log.i("inside doinbackground 2nd",flagdopost);
}
}
else if(params[0].equalsIgnoreCase("itemclick"))
{
x=params[1];
y=params[2];
for(int i=0;i<restaurantidlist.size();i++)
{
if((params[1].toString()).equalsIgnoreCase(restaurantnames.get(i)))
{
sendid=restaurantidlist.get(i);
}
}
Log.i("in do in backgroung idforbundle is", sendid);
flagdopost="itemclicked";
}
return null;
}
public void onPostExecute(Void result)
{
if(flagdopost.equalsIgnoreCase("init"))
{
city.setText(cityname);
ArrayAdapter<String> adaptercuisine=new ArrayAdapter<String>(Restaurantlist.this,android.R.layout.simple_spinner_item,tempcuisinenamelist);
adaptercuisine.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
ArrayAdapter<String> adapterarea=new ArrayAdapter<String>(Restaurantlist.this,android.R.layout.simple_spinner_item,tempareanamelist);
adapterarea.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
area.setAdapter(adapterarea);
area.setSelection(0);
cuisine.setAdapter(adaptercuisine);
cuisine.setSelection(0);
area.setOnItemSelectedListener(Restaurantlist.this);
cuisine.setOnItemSelectedListener(Restaurantlist.this);
}
else if(flagdopost.equalsIgnoreCase("itemselected"))
{
customlist.clear();
populateReslist();
restaurant.invalidateViews();
restaurant.setAdapter(new SimpleAdapter(Restaurantlist.this,customlist,R.layout.customlistrow,new String[] {"Restaurant Name","Area Name"},
new int[] {R.id.tvresname,R.id.tvareaname})
{
@Override
public View getView(int position, View convertView,ViewGroup parent)
{
View view =super.getView(position, convertView, parent);
return view;
}
});
}
else if(flagdopost.equalsIgnoreCase("itemclicked"))
{
Bundle bundle=new Bundle();
bundle.putString("locid",sendid);
Toast.makeText(getBaseContext(), "locId in dopost new one"+sendid, 10).show();
Intent resdetail = new Intent(Restaurantlist.this,Restaurantdetail.class);
resdetail.putExtras(bundle);
startActivity(resdetail);
}
pg.dismiss();
}
}
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
switch(arg0.getId())
{
case R.id.spncuisine:
asynctaskflag="";
if(cuisine.getSelectedItem().toString()!="All")
{
cuisineval=cuisine.getSelectedItem().toString();
}
else
{
cuisineval="*";
}
new Thetask().execute(asynctaskflag,null,null);
break;
case R.id.spnarea:
asynctaskflag="";
if(area.getSelectedItem().toString()!="All")
{
areaval=area.getSelectedItem().toString();
}
else
{
areaval="*";
}
new Thetask().execute(asynctaskflag,null,null);
break;
}
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
推荐答案
尝试在AsyncTask中声明您的ProgressDialog.而不是作为Activity成员变量.
Try declaring your ProgressDialog inside the AsyncTask. Instead of as a Activity member variable.
public class Thetask extends AsyncTask<String, Void, Void>
{
ProgressDialog pg = null;
String x,y;
@Override
public void onPreExecute()
...
这篇关于进度对话框持续显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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