Bonjour,

Je récupère des articles de mon site Web que je récupère grâce à Json et que je met dans une ListView avec un Adapter personnalisé. Par défaut j'affiche les 5 premiers articles. J'aimerais que lorsque l'on arrive à la fin de la ListView donc à la fin du dernière article, 5 nouveaux items apparaissent dynamiquement. J'ai trouvé un exemple sur Internet (voir code) mais je n'arrive pas à le mettre en place dans mon cas. Pourriez-vous m'aider ? Merci.


Mon Activité :

package com.applicazione;


import java.util.ArrayList;
import java.util.HashMap;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.applicazione.R;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;

public class Bastia1905Activity extends Activity {
    /** Called when the activity is first created. */
    
    private myBaseAdapter adapter = null;
    private ListView lv;
    int itemPerPage = 5;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.attualita);

           
        ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
      
       
        JSONObject json = JSONfunctions.getJSONfromURL("http://bastia1905.com/android/export_android.php?nb_article="+itemPerPage);
                
        try{
        	
        	JSONArray  earthquakes = json.getJSONArray("articles");
        	
	        for(int i=0;i<earthquakes.length();i++){						
				HashMap<String, String> map = new HashMap<String, String>();	
				JSONObject e = earthquakes.getJSONObject(i);
				
				map.put("id",  String.valueOf(i));
	        	map.put("titre", e.getString("titre"));
	        	map.put("extrait", e.getString("extrait"));
	        	map.put("thumb", e.getString("thumb"));
	        	map.put("date", e.getString("date"));
	        	map.put("img_article", e.getString("img_article"));
	        	map.put("detail", e.getString("detail"));
	        	mylist.add(map);			
			}		
        }catch(JSONException e)        {
        	 Log.e("log_tag", "Error parsing data "+e.toString());
        }
        

        adapter = new myBaseAdapter(this,this,mylist);
        lv = (ListView)findViewById(R.id.list);
        lv.setAdapter(adapter);	
        lv.setTextFilterEnabled(true);
        lv.setOnItemClickListener(new OnItemClickListener() {
        	public void onItemClick(AdapterView<?> parent, View view, int position, long id) {        		
        		@SuppressWarnings("unchecked")
				HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position);	        		
        		// Nous définissons notre intent en lui disant quelle classe il faut utiliser
				Intent affichearticle = new Intent(getApplicationContext(),ArticleActivity.class);
				affichearticle.putExtra("titre", o.get("titre"));
				affichearticle.putExtra("detail", o.get("detail"));
				affichearticle.putExtra("img_article", o.get("img_article"));
				// On appelle l'activity
				startActivity(affichearticle);
			}
		});
  
    }
    


}

Exemple de ListView avec chargement dynamique

package com.never;

import java.util.ArrayList;
import java.util.Calendar;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;


public class NeverEndingActivity extends Activity {
	
	//how many to load on reaching the bottom
	int itemsPerPage = 5;
	boolean loadingMore = false;
	
	
	
	
	ArrayList<String> myListItems;
	ArrayAdapter<String> adapter;
	
	//For test data :-)
	Calendar d = Calendar.getInstance();
	
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {    	
        super.onCreate(savedInstanceState);
        setContentView(R.layout.listplaceholder);
        
		
		//This will hold the new items
        myListItems = new ArrayList<String>();
        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, myListItems);
        
        ListView list = (ListView)findViewById(R.id.list);
			
		
		//add the footer before adding the adapter, else the footer will nod load!
		View footerView = ((LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.listfooter, null, false);
		list.addFooterView(footerView);
		
		//Set the adapter
		list.setAdapter(adapter);
		
		
		//Here is where the magic happens
		list.setOnScrollListener(new OnScrollListener(){
			
			//useless here, skip!
			public void onScrollStateChanged(AbsListView view, int scrollState) {}
			
			//dumdumdum			
			public void onScroll(AbsListView view, int firstVisibleItem,
					int visibleItemCount, int totalItemCount) {
				
				
				//what is the bottom iten that is visible
				int lastInScreen = firstVisibleItem + visibleItemCount;				
				
				//is the bottom item visible & not loading more already ? Load more !
				if((lastInScreen == totalItemCount) && !(loadingMore)){					
					Thread thread =  new Thread(null, loadMoreListItems);
			        thread.start();
				}
			}
		});
		
		
		//Load the first 15 items
		Thread thread =  new Thread(null, loadMoreListItems);
        thread.start();
    
    }
    
	
    //Runnable to load the items 
    private Runnable loadMoreListItems = new Runnable() {			
		public void run() {
			//Set flag so we cant load new items 2 at the same time
			loadingMore = true;
			
			//Reset the array that holds the new items
	    	myListItems = new ArrayList<String>();
	    	
			//Simulate a delay, delete this on a production environment!
	    	try { Thread.sleep(1000);
			} catch (InterruptedException e) {}
			
			//Get 15 new listitems
	    	for (int i = 0; i < itemsPerPage; i++) {		
				
				//Fill the item with some bogus information
	        	myListItems.add("Date: " + (d.get(Calendar.MONTH)+ 1) + "/" + d.get(Calendar.DATE) + "/" + d.get(Calendar.YEAR) );          	
				
				// +1 day :-D
	        	d.add(Calendar.DATE, 1);
				
			}
			
			//Done! now continue on the UI thread
	        runOnUiThread(returnRes);
	        
		}
	};	
	
    
	//Since we cant update our UI from a thread this Runnable takes care of that! 
    private Runnable returnRes = new Runnable() {
        public void run() {
        	
			//Loop thru the new items and add them to the adapter
			if(myListItems != null && myListItems.size() > 0){
                for(int i=0;i<myListItems.size();i++)
                	adapter.add(myListItems.get(i));
            }
;
			
			//Tell to the adapter that changes have been made, this will cause the list to refresh
            adapter.notifyDataSetChanged();
			
			//Done loading more.
            loadingMore = false;
        }
    };
}