Develop Reference

android json parsing and image loading

I want to parse data and images via url of json.
I have used following code to do same. But i am not getting why the images disappear when i scroll down.
Can Anyone please tell me how can i stop to disappear images when i scroll down ?
Images are loading randomly how can i fix it?
Please find below link of source code :-
http://www.wingnity.com/blog/android-json-parsing-and-image-loading-tutorial/
public class MainActivity extends Activity {
ArrayList<Actors> actorsList;
ActorAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
actorsList = new ArrayList<Actors>();
new JSONAsyncTask().execute("http://milagro.in/wip/apps/n/THDC2.json");
ListView listview = (ListView)findViewById(R.id.list);
adapter = new ActorAdapter(getApplicationContext(), R.layout.row, actorsList);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long id) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), actorsList.get(position).gettata_project_name(), Toast.LENGTH_LONG).show();
}
});
}
class JSONAsyncTask extends AsyncTask<String, Void, Boolean> {
ProgressDialog dialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(MainActivity.this);
dialog.setMessage("Loading, please wait");
dialog.setTitle("Connecting server");
dialog.show();
dialog.setCancelable(false);
}
#Override
protected Boolean doInBackground(String... urls) {
try {
//------------------>>
HttpGet httppost = new HttpGet(urls[0]);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
// StatusLine stat = response.getStatusLine();
int status = response.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsono = new JSONObject(data);
JSONArray jarray = jsono.getJSONArray("data");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
Actors actor = new Actors();
actor.settata_project_name(object.getString("tata_project_name"));
actor.setproject_Typology(object.getString("project_Typology"));
actor.setproject_logo_url(object.getString("project_logo_url"));
actor.setprice(object.getString("price"));
actorsList.add(actor);
}
return true;
}
//------------------>>
} catch (ParseException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}
protected void onPostExecute(Boolean result) {
dialog.cancel();
adapter.notifyDataSetChanged();
if(result == false)
Toast.makeText(getApplicationContext(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();
}
}
}
public class ActorAdapter extends ArrayAdapter<Actors> {
ArrayList<Actors> actorList;
LayoutInflater vi;
int Resource;
ViewHolder holder;
public ActorAdapter(Context context, int resource, ArrayList<Actors> objects) {
super(context, resource, objects);
vi = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
actorList = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// convert view = design
View v = convertView;
if (v == null) {
holder = new ViewHolder();
v = vi.inflate(Resource, null);
holder.imageview = (ImageView) v.findViewById(R.id.ivImage);
holder.Projectname = (TextView) v.findViewById(R.id.Projectname);
holder.typology = (TextView) v.findViewById(R.id.typology);
holder.price = (TextView) v.findViewById(R.id.price);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
new DownloadImageTask(holder.imageview).execute(actorList.get(position).getproject_logo_url());
holder.imageview.setImageResource(R.drawable.ic_launcher);
//new DownloadImageTask(holder.imageview).execute(actorList.get(position).getproject_logo_url());
holder.Projectname.setText(actorList.get(position).gettata_project_name());
holder.typology.setText(actorList.get(position).getproject_Typology());
holder.price.setText("Price: " + actorList.get(position).getprice());
return v;
}
static class ViewHolder {
public ImageView imageview;
public TextView Projectname;
public TextView typology;
public TextView price;
}
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
public class Actors {
private String tata_project_name;
private String project_Typology;
private String project_logo_url;
private String price;
public Actors() {
// TODO Auto-generated constructor stub
}
public Actors(String tata_project_name, String project_Typology,String project_logo_url, String price ) {
super();
this.tata_project_name = tata_project_name;
this.project_Typology = project_Typology;
this.project_logo_url = project_logo_url;
this.price = price;
}
public String gettata_project_name() {
return tata_project_name;
}
public void settata_project_name(String tata_project_name) {
this.tata_project_name = tata_project_name;
}
public String getproject_Typology() {
return project_Typology;
}
public void setproject_Typology(String project_Typology) {
this.project_Typology = project_Typology;
}
public String getproject_logo_url() {
return project_logo_url;
}
public void setproject_logo_url(String project_logo_url) {
this.project_logo_url = project_logo_url;
}
public String getprice() {
return price;
}
public void setprice(String price) {
this.price = price;
}
}

try this library Picaso this is the best image loading library from url.

After using Volley library The problem is solved.

Android listview scrolling image wrong (shuffle)

I have a big problem.I'm trying to make a ListView with dynamically loaded images, using an AsyncTask to download the image and then set it into the ListView. My problem is that, while scrolling down, the images get randomly changed.I saw answers but I can't figure.
My Codes:
(Adapter)
public class ActorAdapter extends ArrayAdapter<Actors> {
ArrayList<Actors> actorList;
private static LayoutInflater vi;
int Resource;
ViewHolder holder;
public ActorAdapter(Context context, int resource, ArrayList<Actors> objects) {
super(context, resource, objects);
vi = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
actorList = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
holder = new ViewHolder();
v = vi.inflate(Resource, null);
holder.imageHaberFoto = (ImageView) v.findViewById(R.id.ivImage);
holder.tvHaberBaslik = (TextView) v.findViewById(R.id.tvHaberBaslik);
holder.tvHaberTarihi = (TextView) v.findViewById(R.id.tvHaberTarihi);
holder.tvKisaTanim = (TextView) v.findViewById(R.id.tvKisaTanim);
holder.tvDetay = (TextView) v.findViewById(R.id.tvDetay);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
new DownloadImageTask(holder.imageHaberFoto).execute(actorList.get(position).getHaberFoto());
holder.tvHaberBaslik.setText(actorList.get(position).getHaberBaslik());
holder.tvKisaTanim.setText(actorList.get(position).getHaberKisatanim());
holder.tvHaberTarihi.setText(actorList.get(position).getHaberTarihi());
holder.tvDetay.setText(actorList.get(position).getDetay());
return v;
}
static class ViewHolder {
public ImageView imageHaberFoto;
public TextView tvHaberBaslik;
public TextView tvHaberTarihi;
public TextView tvKisaTanim;
public TextView tvDetay;
}
private static class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
}
Actor Class :
public class Actors {
private String HaberBaslik;
private String HaberTarihi;
private String HaberKisatanim;
private String HaberlerLink;
private String HaberFoto;
private String Detay;
public Actors() {
}
//Getters and setters
public String getHaberBaslik() {
return HaberBaslik;
}
public void setHaberBaslik(String HaberBaslik) {
this.HaberBaslik = HaberBaslik;
}
public String getHaberTarihi() {
return HaberTarihi;
}
public void setHaberTarihi(String HaberTarihi) {
this.HaberTarihi = HaberTarihi;
}
public String getHaberKisatanim() {
return HaberKisatanim;
}
public void setHaberKisatanim(String HaberKisatanim) {
this.HaberKisatanim = HaberKisatanim;
}
public String getHaberlerLink() {
return HaberlerLink;
}
public void setHaberlerLink(String HaberlerLink) {
this.HaberlerLink = HaberlerLink;
}
public String getDetay() {
return Detay;
}
public void setDetay(String Detay) {
this.Detay = Detay;
}
public String getHaberFoto() {
return HaberFoto;
}
public void setHaberFoto(String HaberFoto) {
this.HaberFoto = "http://www.developers.net/images/"+HaberFoto;
}
}
ListView:
ArrayList actorsList;
ActorAdapter adapter;
new JSONAsyncTask().execute("http://www.developers.net/WebServices/GetJson.aspx?q=Haber");
ListView listview = (ListView) findViewById(R.id.list);
adapter = new ActorAdapter(getApplicationContext(), R.layout.row, actorsList);
listview.setAdapter(adapter);
//JSONAsyncTask
class JSONAsyncTask extends AsyncTask<String, Void, Boolean> {
ProgressDialog dialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(haberler.this);
dialog.setMessage("Lütfen bekleyin.");
dialog.setTitle("İçerik Yüklemesi");
dialog.show();
dialog.setCancelable(false);
}
#Override
protected Boolean doInBackground(String... urls) {
try {
//------------------>>
HttpGet httppost = new HttpGet(urls[0]);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
// StatusLine stat = response.getStatusLine();
int status = response.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsono = new JSONObject(data);
JSONArray jarray = jsono.getJSONArray("Haberler");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
Actors actor = new Actors();
actor.setHaberBaslik(object.getString("Baslik"));
actor.setHaberKisatanim(object.getString("Kisa"));
actor.setDetay(object.getString("Detay"));
actor.setHaberTarihi(object.getString("Tarih").replace("00:00:00",""));
actor.setHaberFoto(object.getString("Foto"));
actorsList.add(actor);
}
return true;
}
//------------------>>
} catch (ParseException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}
protected void onPostExecute(Boolean result) {
dialog.cancel();
adapter.notifyDataSetChanged();
if (result == false)
Toast.makeText(getApplicationContext(), "Veri alınamıyor.Lütfen daha sonra tekrar deneyin.", Toast.LENGTH_LONG).show();
}
}

RSS Reader doesent fetch HTML Characters

The RSS Reader doesent fetch HTML Characters like "#8220;" so when the feed is "Hey#8220;" the App shows only "Hey" but i doesent know why. I tried things like Html.fromHtml, but it doesent work. Does anyone see the mistake?
Thanks for answers
`public class AndroidRssReader extends ListActivity {
private RSSFeed myRssFeed = null;
TextView feedTitle;
TextView feedDescribtion;
TextView feedPubdate;
TextView feedLink;
public class MyCustomAdapter extends ArrayAdapter<RSSItem> {
public MyCustomAdapter(Context context, int textViewResourceId,
List<RSSItem> list) {
super(context, textViewResourceId, list);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
//return super.getView(position, convertView, parent);
View row = convertView;
if(row==null){
LayoutInflater inflater=getLayoutInflater();
row=inflater.inflate(R.layout.row, parent, false);
}
TextView listTitle=(TextView)row.findViewById(R.id.listtitle);
listTitle.setText(myRssFeed.getList().get(position).getTitle());
TextView listPubdate=(TextView)row.findViewById(R.id.listpubdate);
listPubdate.setText(myRssFeed.getList().get(position).getPubdate());
if (position%2 == 0){
listTitle.setBackgroundColor(0xff101010);
listPubdate.setBackgroundColor(0xff101010);
}
else{
listTitle.setBackgroundColor(0xff080808);
listPubdate.setBackgroundColor(0xff080808);
}
return row;
}
}
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
feedTitle = (TextView)findViewById(R.id.feedtitle);
feedDescribtion = (TextView)findViewById(R.id.feeddescribtion);
feedPubdate = (TextView)findViewById(R.id.feedpubdate);
feedLink = (TextView)findViewById(R.id.feedlink);
readRss();
}
private void readRss(){
feedTitle.setText("--- wait ---");
feedDescribtion.setText("");
feedPubdate.setText("");
feedLink.setText("");
setListAdapter(null);
Toast.makeText(this, "News werden geladen...", Toast.LENGTH_LONG).show();
try {
URL rssUrl = new URL("MYURL");
SAXParserFactory mySAXParserFactory = SAXParserFactory.newInstance();
SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
XMLReader myXMLReader = mySAXParser.getXMLReader();
RSSHandler myRSSHandler = new RSSHandler();
myXMLReader.setContentHandler(myRSSHandler);
InputSource myInputSource = new InputSource(rssUrl.openStream());
myXMLReader.parse(myInputSource);
myRssFeed = myRSSHandler.getFeed();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (myRssFeed!=null)
{
Calendar c = Calendar.getInstance();
String strCurrentTiime = "\n(Time of Reading - "
+ c.get(Calendar.HOUR_OF_DAY)
+ " : "
+ c.get(Calendar.MINUTE) + ")\n";
feedTitle.setText(myRssFeed.getTitle() + strCurrentTiime);
feedDescribtion.setText(myRssFeed.getDescription());
feedPubdate.setText(myRssFeed.getPubdate());
feedLink.setText(myRssFeed.getLink());
MyCustomAdapter adapter =
new MyCustomAdapter(this, R.layout.row, myRssFeed.getList());
setListAdapter(adapter);
}
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
/*Intent intent = new Intent(this,ShowDetails.class);
Bundle bundle = new Bundle();
bundle.putString("keyTitle", myRssFeed.getItem(position).getTitle());
bundle.putString("keyDescription", myRssFeed.getItem(position).getDescription());
bundle.putString("keyLink", myRssFeed.getItem(position).getLink());
bundle.putString("keyPubdate", myRssFeed.getItem(position).getPubdate());
intent.putExtras(bundle);
startActivity(intent);*/
Uri feedUri = Uri.parse(myRssFeed.getItem(position).getLink());
Intent myIntent = new Intent(Intent.ACTION_VIEW, feedUri);
startActivity(myIntent);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
menu.add(0, 0, 0, "Refresh");
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch(item.getItemId()){
case (0): readRss();
break;
default:
break;
}
return true;
}
}`
public class RSSFeed {
private String title = null;
private String description = null;
private String link = null;
private String pubdate = null;
private List<RSSItem> itemList;
RSSFeed(){
itemList = new Vector<RSSItem>(0);
}
void addItem(RSSItem item){
itemList.add(item);
}
RSSItem getItem(int location){
return itemList.get(location);
}
List<RSSItem> getList(){
return itemList;
}
void setTitle(String value)
{
title = value;
}
void setDescription(String value)
{
description = value;
}
void setLink(String value)
{
link = value;
}
void setPubdate(String value)
{
pubdate = value;
}
String getTitle()
{
return title;
}
String getDescription()
{
return description;
}
String getLink()
{
return link;
}
String getPubdate()
{
return pubdate;
}
}
public class RSSHandler extends DefaultHandler {
final int state_unknown = 0;
final int state_title = 1;
final int state_description = 2;
final int state_link = 3;
final int state_pubdate = 4;
int currentState = state_unknown;
RSSFeed feed;
RSSItem item;
boolean itemFound = false;
RSSHandler(){
}
RSSFeed getFeed(){
return feed;
}
#Override
public void startDocument() throws SAXException {
// TODO Auto-generated method stub
feed = new RSSFeed();
item = new RSSItem();
}
#Override
public void endDocument() throws SAXException {
// TODO Auto-generated method stub
}
#Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
// TODO Auto-generated method stub
if (localName.equalsIgnoreCase("item")){
itemFound = true;
item = new RSSItem();
currentState = state_unknown;
}
else if (localName.equalsIgnoreCase("title")){
currentState = state_title;
}
else if (localName.equalsIgnoreCase("description")){
currentState = state_description;
}
else if (localName.equalsIgnoreCase("link")){
currentState = state_link;
}
else if (localName.equalsIgnoreCase("pubdate")){
currentState = state_pubdate;
}
else{
currentState = state_unknown;
}
}
#Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
// TODO Auto-generated method stub
if (localName.equalsIgnoreCase("item")){
feed.addItem(item);
}
}
#Override
public void characters(char[] ch, int start, int length)
throws SAXException {
// TODO Auto-generated method stub
String strCharacters = new String(ch,start,length);
if (itemFound==true){
// "item" tag found, it's item's parameter
switch(currentState){
case state_title:
item.setTitle(strCharacters);
break;
case state_description:
item.setDescription(strCharacters);
break;
case state_link:
item.setLink(strCharacters);
break;
case state_pubdate:
item.setPubdate(strCharacters);
break;
default:
break;
}
}
else{
// not "item" tag found, it's feed's parameter
switch(currentState){
case state_title:
feed.setTitle(strCharacters);
break;
case state_description:
feed.setDescription(strCharacters);
break;
case state_link:
feed.setLink(strCharacters);
break;
case state_pubdate:
feed.setPubdate(strCharacters);
break;
default:
break;
}
}
currentState = state_unknown;
}
}
public class RSSItem {
private String title = null;
private String description = null;
private String link = null;
private String pubdate = null;
RSSItem(){
}
void setTitle(String value)
{
value.replace("#8220;", "hi");
title =value;
}
void setDescription(String value)
{
description = value;
}
void setLink(String value)
{
link = value;
}
void setPubdate(String value)
{
pubdate = value;
}
String getTitle()
{
return title;
}
String getDescription()
{
return description;
}
String getLink()
{
return link;
}
String getPubdate()
{
return pubdate;
}
/*#Override
public String toString() {
// TODO Auto-generated method stub
return title;
}*/
}

InputSource myInputSource = new InputSource(rssUrl.openStream());
myXMLReader.parse(myInputSource);
Set an encoding to your input source or stream. This sample code can help you.

Parsing CDATA in android RSS

I'm trying to make an ANDROID app that reads RSS feeds so I used this tutorial ( http://android-er.blogspot.com/2010/05/simple-rss-reader-ii-implement-with.html ) and implemented it to my own url rss feeder. But the description tag isn't being shown..mostly cz in the xml of the feeder the description tags are CDATA. how can i parse the description cdata in my rss??Thanks!
here is my RSSHandler code :
import org.xml.sax.Attributes;
import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler;
public class RSSHandler extends DefaultHandler {
final int state_unknown = 0;
final int state_title = 1;
final int state_description = 2;
final int state_link = 3;
final int state_pubdate = 4;
int currentState = state_unknown;
RSSFeed feed;
RSSItem item;
boolean itemFound = false;
RSSHandler(){
}
RSSFeed getFeed(){
return feed;
}
#Override
public void startDocument() throws SAXException {
// TODO Auto-generated method stub
feed = new RSSFeed();
item = new RSSItem();
}
#Override
public void endDocument() throws SAXException {
// TODO Auto-generated method stub
}
#Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
// TODO Auto-generated method stub
if (localName.equalsIgnoreCase("item")){
itemFound = true;
item = new RSSItem();
currentState = state_unknown;
}
else if (localName.equalsIgnoreCase("title")){
currentState = state_title;
}
else if (localName.equalsIgnoreCase("description")){
currentState = state_description;
}
else if (localName.equalsIgnoreCase("link")){
currentState = state_link;
}
else if (localName.equalsIgnoreCase("pubdate")){
currentState = state_pubdate;
}
else{
currentState = state_unknown;
}
}
#Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
// TODO Auto-generated method stub
if (localName.equalsIgnoreCase("item")){
feed.addItem(item);
}
}
#Override
public void characters(char[] ch, int start, int length)
throws SAXException {
// TODO Auto-generated method stub
String strCharacters = new String(ch,start,length);
if (itemFound==true){
// "item" tag found, it's item's parameter
switch(currentState){
case state_title:
item.setTitle(strCharacters);
break;
case state_description:
item.setDescription(strCharacters);
break;
case state_link:
item.setLink(strCharacters);
break;
case state_pubdate:
item.setPubdate(strCharacters);
break;
default:
break;
}
}
else{
// not "item" tag found, it's feed's parameter
switch(currentState){
case state_title:
feed.setTitle(strCharacters);
break;
case state_description:
feed.setDescription(strCharacters);
break;
case state_link:
feed.setLink(strCharacters);
break;
case state_pubdate:
feed.setPubdate(strCharacters);
break;
default:
break;
}
}
currentState = state_unknown;
}
and here is my RSSReader code :
public class AndroidRssReader extends ListActivity {
private RSSFeed myRssFeed = null;
//private ArrayList<RSSItem> myRssFeed = null;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
try {
//URL rssUrl = new URL("http://www.gov.hk/en/about/rss/govhkrss.data.xml");
URL rssUrl = new URL("http://www.merehbi.com/online/index.php?option=com_content&view=category&layout=blog&id=58&Itemid=155&lang=ar&format=feed&type=rss");
SAXParserFactory mySAXParserFactory = SAXParserFactory.newInstance();
SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
XMLReader myXMLReader = mySAXParser.getXMLReader();
RSSHandler myRSSHandler = new RSSHandler();
myXMLReader.setContentHandler(myRSSHandler);
InputSource myInputSource = new InputSource(rssUrl.openStream());
myXMLReader.parse(myInputSource);
myRssFeed = myRSSHandler.getFeed();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (myRssFeed!=null)
{
TextView feedTitle = (TextView)findViewById(R.id.feedtitle);
TextView feedDescribtion = (TextView)findViewById(R.id.feeddescribtion);
TextView feedPubdate = (TextView)findViewById(R.id.feedpubdate);
TextView feedLink = (TextView)findViewById(R.id.feedlink);
feedTitle.setText(myRssFeed.getTitle());
feedDescribtion.setText(myRssFeed.getDescription());
feedPubdate.setText(myRssFeed.getPubdate());
feedLink.setText(myRssFeed.getLink());
ArrayAdapter<RSSItem> adapter =
new ArrayAdapter<RSSItem>(this,
android.R.layout.simple_list_item_1,myRssFeed.getList());
setListAdapter(adapter);
}
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
Intent intent = new Intent(this,ShowDetails.class);
Bundle bundle = new Bundle();
bundle.putString("keyTitle", myRssFeed.getItem(position).getTitle());
bundle.putString("keyDescription", myRssFeed.getItem(position).getDescription());
bundle.putString("keyLink", myRssFeed.getItem(position).getLink());
bundle.putString("keyPubdate", myRssFeed.getItem(position).getPubdate());
intent.putExtras(bundle);
startActivity(intent);
}
}

i use this tutorial and its codes
http://www.androidhive.info/2011/11/android-xml-parsing-tutorial/
and change some code by this answer
https://stackoverflow.com/a/8489223/3636653
public static void main(String[] args) throws Exception {
File file = new File("data.xml");
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(file);
NodeList nodes = doc.getElementsByTagName("topic");
for (int i = 0; i < nodes.getLength(); i++) {
Element element = (Element) nodes.item(i);
NodeList title = element.getElementsByTagName("title");
Element line = (Element) title.item(0);
System.out.println("Title: " + getCharacterDataFromElement(line));
}
}
public static String getCharacterDataFromElement(Element e) {
Node child = e.getFirstChild();
if (child instanceof CharacterData) {
CharacterData cd = (CharacterData) child;
return cd.getData();
}
return "";
}

android:load images from url and show in gridview

i am making an app in which i have to get response from xml and i get image urls .Now i want to put images from urls into gridview but i dnt know how to extract images from urls and put in gridview.Any help will be appreciated.My code is as follows:
public class GalleryNewActivity extends Activity {
private ProgressDialog dialog;
GridView ga;
Element e;
Node elem;
public List<Drawable> pictures;
ImageView imageView;
static final String PREFS_NAME = "MyPrefs";
static final String USER_KEY = "user";
static final String Name = "name";
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
if(isNetworkconn()){
new GetSPCAsyncTask().execute("");
}else{
showDialogOnNoInternet();
}
ga = (GridView)findViewById(R.id.Gallery01);
ga.setAdapter(new ImageAdapter(this));
imageView = (ImageView)findViewById(R.id.ImageView01);
}
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return pictures.size();
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
View v;
if (convertView == null) { // if it's not recycled, initialize some
// attributes
LayoutInflater li = getLayoutInflater();
v = li.inflate(R.layout.galleryitem, null);
imageView = (ImageView)v.findViewById(R.id.thumbImage);
imageView.setLayoutParams(new GridView.LayoutParams(200, 250));
// imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(2, 5, 2, 5);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageDrawable(pictures.get(position));
imageView.setTag(pics[position]);
return imageView;
}
private class GetPicsToNextPage extends AsyncTask<String, String, String>{
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog = ProgressDialog.show(GalleryNewActivity.this, "Please wait", "Loading...");
}
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
String str = null;
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return str;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
dialog.dismiss();
Intent intent = new Intent(getApplicationContext(), Flip3d.class);
startActivity(intent);
}
}
private boolean isNetworkconn(){
ConnectivityManager conMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if (conMgr.getActiveNetworkInfo() != null && conMgr.getActiveNetworkInfo().isAvailable() && conMgr.getActiveNetworkInfo().isConnected()) {
return true;
}else{
return false;
}
}
private void showDialogOnNoInternet(){
AlertDialog.Builder alt_bld = new AlertDialog.Builder(GalleryNewActivity.this);
alt_bld.setTitle("Error.");
alt_bld.setMessage("Your phone is not connected to internet.");
alt_bld.setCancelable(false);
alt_bld.setNeutralButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.dismiss();
}
});
alt_bld.show();
}
//loader for dynamic starts
private class GetSPCAsyncTask extends AsyncTask<String, String, String>{
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog = ProgressDialog.show(GalleryNewActivity.this, "Please wait", "Loading...");
}
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
String xml = XMLfunctions.getXML();
Document doc = XMLfunctions.XMLfromString(xml);
NodeList nodes = doc.getElementsByTagName("Image");
for (int i = 0; i < nodes.getLength(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
e = (Element)nodes.item(i);
//map.put("Image", XMLfunctions.getValue(e, "Image"));
map.put("ImagePath", "Naam:" + XMLfunctions.getValue(e, "ImagePath"));
map.put("ImageHeadline", "Headline: " + XMLfunctions.getValue(e, "ImageHeadline"));
System.out.println(map.put("ImageHeadline", "Headline: " + XMLfunctions.getValue(e, "ImageHeadline")));
map.put("ImageDesc", "Desc: " + XMLfunctions.getValue(e, "ImageDesc"));
System.out.println(map.put("ImageDesc", "Desc: " + XMLfunctions.getValue(e, "ImageDesc")));
mylist.add(map);
Drawable d=LoadImageFromWebOperations();
pictures.add(d);
}
return xml;}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
dialog.dismiss();
}
private Drawable LoadImageFromWebOperations()
{
String path=XMLfunctions.getValue(e, "ImagePath");
try{
InputStream is = (InputStream) new URL(path).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
Log.w("CREADO","CREADO");
return d;
}catch (Exception e) {
System.out.println("Exc="+e);
return null;
}
}
}
}

I would suggest you to check below solutions for loading images from URL:
Android - Universal Image loader by Nostra
Lazy load of images in ListView
Result you can get if you use Universal image loader:

call this function with url you will get Drawable , and then store this drawables into custom class and then place in grid view.
call function like this
ImageOperations(this, imageurl)
public Object fetch(String address) throws MalformedURLException, IOException {
URL url = new URL(address);
Object content = url.getContent();
return content;
}
private Drawable ImageOperations(Context ctx, String url) {
try {
InputStream is = (InputStream) this.fetch(url);
Drawable d = Drawable.createFromStream(is, "src");
return d;
} catch (MalformedURLException e) {
return null;
} catch (IOException e) {
return null;
}
}

https://github.com/koush/UrlImageViewHelper
UrlImageViewHelper will fill an ImageView with an image that is found at a URL.
The sample will do a Google Image Search and load/show the results asynchronously.
UrlImageViewHelper will automatically download, save, and cache all the image urls the BitmapDrawables. Duplicate urls will not be loaded into memory twice. Bitmap memory is managed by using a weak reference hash table, so as soon as the image is no longer used by you, it will be garbage collected automatically.
else use this,
public static Bitmap loadBitmap(String url) {
Bitmap bitmap = null;
InputStream in = null;
BufferedOutputStream out = null;
try {
in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);
final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
copy(in, out);
out.flush();
final byte[] data = dataStream.toByteArray();
BitmapFactory.Options options = new BitmapFactory.Options();
//options.inSampleSize = 1;
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
} catch (IOException e) {
Log.e(TAG, "Could not load Bitmap from: " + url);
} finally {
closeStream(in);
closeStream(out);
}
return bitmap;
}