من مثال astro.mania آقای کمالان را اجرا کردم
package com.astro.mania.activities;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import cam.astro.mania.adapters.ImageAdapter;
import cam.astro.mania.adapters.NewsAdapter;
import com.astro.mania.classes.NewsFeedImageResizer;
import com.astro.mania.classes.NewsFeedItemList;
import com.astro.mania.handlers.NewsParserHandler;
import com.astro.mania.management.Manager;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.Gallery;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;
@SuppressLint("ShowToast")
@SuppressWarnings("deprecation")
public class NewsList extends Activity {
private ProgressDialog progressBar;
private NewsAdapter newsAdapter;
private Button btnSetting;
private Button btnMenu;
private Gallery gallery;
private GridView gridView;
private String strServerResponseMsg;
private NewsFeedItemList parsedList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_newslist);
Log.i("NewsList", "NewsList activity started...");
// Creating an object of NewsAdapter for displaying data in the screen
newsAdapter = new NewsAdapter(this);
// Settings button should be invisible in this screen
btnSetting = (Button) findViewById(R.id.btn_menu_settings);
btnSetting.setVisibility(View.INVISIBLE);
// Menu button should be visible in this screen
btnMenu = (Button) findViewById(R.id.btn_menu_compound);
btnMenu.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// Intent intent = new Intent(Settings.this, MainMenu.class);
// startActivity(intent);
NewsList.this.finish();
}
});
// Initialising grid view to show news
gridView = (GridView) findViewById(R.id.news_gridview);
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(NewsList.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
// Initialising gallery view with predefined images
// Set middle image to be stayed in the middle of screen
ImageAdapter imAdapter = new ImageAdapter(this);
gallery = (Gallery) findViewById(R.id.gallery);
gallery.setAdapter(imAdapter);
gallery.setSelection(imAdapter.getCount()/2);
gallery.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(NewsList.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
/* Running AsyncTask in order to get data from server */
if(isConnectedToInternet())
new MyAsyncTask().execute();
else
Toast.makeText(this, "Interconnection not found.", Toast.LENGTH_LONG);
}
@Override
protected void onStart() {
super.onStart();
Log.i("NewsList", "inside onStart();");
}
@Override
protected void onStop() {
super.onStop();
stopLoading();
Log.i("NewsList", "inside onStop(); myAsyncTask cancelled.");
}
/*----------------------------------------------------------------------------
* This method is responsible for creating another thread in parallel with
* main UI thread in order to connect to server and get data. When data
* received should display data in the screen after data prepared for display.
* --------------------------------------------------------------------------- */
public class MyAsyncTask extends AsyncTask<Void, Void, Boolean> {
@Override
protected void onPreExecute() {
Log.i("Inside AsyncTask", "myAsyncTask is abut to start...");
showLoading();
}
@Override
protected Boolean doInBackground(Void... params) {
boolean status = false;
try {
URL url = new URL(Manager.NEWS_URL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(Manager.ConnTimeout);
conn.setReadTimeout(Manager.ReadTimeout);
int responseCode = conn.getResponseCode();
Log.i("Connection oppened", "Response code is:" + responseCode);
if (responseCode == HttpURLConnection.HTTP_OK) {
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
if (in != null) {
StringBuilder strBuilder = new StringBuilder();
// Read character by character
int ch = 0;
while ((ch = in.read()) != -1)
strBuilder.append((char) ch);
// Showing returned message
strServerResponseMsg = strBuilder.toString();
// Log.i("Data returned by server:", strServerResponseMsg);
status = true;
}
in.close();
}
} catch (IOException e) {
e.printStackTrace();
}
return status;
}
@Override
protected void onPostExecute(Boolean result) {
Log.i("Inside AsyncTask", "myAsyncTask finished its task. Data returned to caller.");
parseServerResponse();
displayData();
stopLoading();
}
}
/*----------------------------
* NEWS Parser & Image Resizer
* ---------------------------*/
private void parseServerResponse(){
parsedList = parseNewsContent();
NewsFeedImageResizer imgResizer = new NewsFeedImageResizer(this, parsedList.getImage());
ArrayList<String> newLinks = imgResizer.getNewLinks();
Collections.copy(parsedList.getImage(), newLinks);
// for(int i=0; i<parsedList.getImage().size(); i++)
// Log.i("images_parsedList>>>", parsedList.getImage().get(i));
}
/*-----------------------------------------------------------------------
* This method parses the content of News based of SAX Parser method and
* the returns parsed content with "itemList" object. This object has six
* properties which each of them is ArrayList.
* ---------------------------------------------------------------------- */
private NewsFeedItemList parseNewsContent() {
NewsParserHandler newsParserHandler = null;
Log.i("NewsList", "Starting to parse XML...");
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
XMLReader xr = parser.getXMLReader();
newsParserHandler = new NewsParserHandler();
xr.setContentHandler(newsParserHandler);
ByteArrayInputStream is = new ByteArrayInputStream(strServerResponseMsg.getBytes ());
xr.parse(new InputSource(is));
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
NewsFeedItemList itemList = newsParserHandler.getNewsList();
// checkLog(itemList);
Log.i("NewsList", "Parsing XML finished. Sending result back to caller...");
return itemList;
}
/*--------------------------------------
* Setup adapter and displaying data
* -------------------------------------*/
private void displayData(){
newsAdapter.setData(parsedList);
gridView.setAdapter(newsAdapter);
newsAdapter.notifyDataSetChanged();
}
/*-----------------------------------------------------------------------------------
* Checking Internet connection. True: connection found, False: connection not found
* ---------------------------------------------------------------------------------*/
public boolean isConnectedToInternet(){
Log.i("NewsList", "Checking Internet Connection...");
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting()) {
Log.i("NewsList", "Internet Connection found.");
return true;
}
Log.i("NewsList", "Internet Connection not found.");
return false;
}
/*-----------------------------------------------------------------------------------
* Showing / Stopping progress dialog which is showing loading animation
* ---------------------------------------------------------------------------------*/
private void showLoading(){
progressBar = ProgressDialog.show(NewsList.this, "", "");
progressBar.setContentView(R.layout.anim_loading);
progressBar.setCancelable(true);
final ImageView imageView = (ImageView) progressBar.findViewById(R.id.blankImageView);
Animation rotation = AnimationUtils.loadAnimation(NewsList.this, R.anim.rotate);
imageView.startAnimation(rotation);
}
private void stopLoading() {
if(progressBar.isShowing())
progressBar.dismiss();
}
/* ----------------------------------------------------------------------------------
* This method just shows the result of data which is parsed and show it in Logcat.
* ----------------------------------------------------------------------------------*/
@SuppressWarnings("unused")
private void checkLog(NewsFeedItemList itemList) {
ArrayList<String> listTitle = itemList.getTitle();
ArrayList<String> listDescription = itemList.getDescription();
ArrayList<String> listFullbody = itemList.getFullbody();
ArrayList<String> listLink = itemList.getLink();
ArrayList<String> listPubDate = itemList.getPubDate();
ArrayList<String> listImage = itemList.getImage();
for(String str: listTitle)
Log.i("listTitle", str);
for(String str: listDescription)
Log.i("listDescription", str);
for(String str: listFullbody)
Log.i("listFullbody", str);
for(String str: listLink)
Log.i("listLink", str);
for(String str: listPubDate)
Log.i("listPubDate", str);
for(String str: listImage)
Log.i("listImage", str);
}
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android = "http://schemas.android.com/apk/res/android"
android:layout_width = "fill_parent"
android:layout_height = "fill_parent"
android:background = "@drawable/bg" >
<!-- Loading header of this UI which is coded separately -->
<include
android:id = "@+id/header"
layout = "@layout/header_bar" />
<Gallery
android:id = "@+id/gallery"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content"
android:layout_alignParentBottom = "true" />
<GridView
android:id = "@+id/news_gridview"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content"
android:layout_marginTop = "10dip"
android:numColumns = "2"
android:verticalSpacing = "5dp"
android:horizontalSpacing = "5dp"
android:layout_below = "@id/header"
android:layout_above = "@id/gallery" />
<!-- <include
android:id="@+id/footer"
layout="@layout/footer_gallery" /> -->
</RelativeLayout>