Android Open Source - Get_elements_from_web_and_caching Hello

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Back to project page Get_elements_from_web_and_caching.

License

The source code is released under:

Apache License

Java Source Code

package vierco.com.example.template;
//from www . j  ava  2s . c om
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import methods.XMLParser;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import adapters.Adapter_List;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.ProgressBar;


public class Hello extends ActionBarActivity {

  String xml;
  ArrayList<HashMap<String, String>> myElementsList;
  HashMap<String, String> map;
  Adapter_List adapter;

  String KEY_ITEM="item";
  public static String KEY_TITLE="title";
  public static String KEY_SUBTITLE="subtitle";
  public static String KEY_IMAGE="image";

  HttpResponse response;
  HttpClient httpClient;
  HttpPost request;
  StringBuffer stringBuffer;
  List<NameValuePair> postParameters;
  BufferedReader bufferedReader = null;

  Button btn_connect;
  ListView listv_myList;
  ProgressBar pbar_parsing;

  // Asynctask connection
  public class parseList extends AsyncTask<String, Void, String>{

    protected void onPreExecute() {

      pbar_parsing.setVisibility(View.VISIBLE);

    }

    public String doInBackground(String... urls){

      httpClient = new DefaultHttpClient();
      request = new HttpPost("http://www.hellovierco.com/Daleks/github_template_caching.xml");
      postParameters = new ArrayList<NameValuePair>();

      try {
        UrlEncodedFormEntity entity = new UrlEncodedFormEntity(postParameters);
        request.setEntity(entity);

        HttpResponse response= httpClient.execute(request);

        bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
        stringBuffer = new StringBuffer("");
        String line = "";
        String LineSeparator = System.getProperty("line.separator");
        while ((line = bufferedReader.readLine()) != null) {
          stringBuffer.append(line + LineSeparator); 
        }
        bufferedReader.close();

      } catch (ClientProtocolException e) {

        e.printStackTrace();

      } catch (IOException e) {

        e.printStackTrace();
      }finally{
        if (bufferedReader != null){
          try {
            bufferedReader.close();
          } catch (IOException e) {

            e.printStackTrace();
          }
        }
      }

      return xml;
    }

    public void onPostExecute(String xml){

      xml=stringBuffer.toString();
      XMLParser parser = new XMLParser();
      try {
        myElementsList = new ArrayList<HashMap<String, String>>();

        Document doc = parser.getDomElement(xml); 

        NodeList nl0 = doc.getElementsByTagName(KEY_ITEM);
        for (int i = 0; i < nl0.getLength(); i++) {
          map = new HashMap<String, String>();
          Element e = (Element) nl0.item(i);

          map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE));
          map.put(KEY_SUBTITLE, parser.getValue(e, KEY_SUBTITLE));
          map.put(KEY_IMAGE, parser.getValue(e, KEY_IMAGE));

          myElementsList.add(map);
        }
        assignAdapter();
        pbar_parsing.setVisibility(View.GONE);

      } catch (Exception e) {

      }  

    }  
  } 

  public void assignAdapter() {

    adapter=new Adapter_List(this, myElementsList);        
    listv_myList.setAdapter(adapter);

  }

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.hello);

    btn_connect = (Button) findViewById(R.id.BT_connect);
    listv_myList = (ListView) findViewById(R.id.LISTV_myList);
    pbar_parsing = (ProgressBar) findViewById(R.id.PBAR_parsing);


    // Listeners
    btn_connect.setOnClickListener(new View.OnClickListener(){ 
      public void onClick(View view){ 
        new parseList().execute();
      }
    });

  }


  @Override
  public boolean onCreateOptionsMenu(Menu menu) {

    getMenuInflater().inflate(R.menu.hello, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {

    int id = item.getItemId();
    if (id == R.id.action_settings) {
      return true;
    }
    return super.onOptionsItemSelected(item);
  }



}

Java Source Code List

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