Can Not Set or Get the ItemId of Listview

[meral]

Hello all,

on item click of listview I populated the following code

public class Ws extends Activity  {
    Button btn;
    
    ArrayAdapter<String> aa;
    ArrayList<String> al;
    
    SimpleAdapter sa;
    ArrayList<HashMap<String, String>> mylist;
    
    ListView lv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ws);
         
         lv = (ListView) findViewById(R.id.listView1);
         
         mylist = new ArrayList<HashMap<String,String>>();
         
         al = new ArrayList<String>();
         
         HttpClient httpclient = new DefaultHttpClient();
         
         try {
             String responseBody = httpclient.execute(new HttpPost("http://mydomain/userlist.php"),new BasicResponseHandler());
             
             JSONArray jArray = new JSONArray(responseBody);
              for (int i = 0; i < jArray.length(); i++) {
                  JSONObject e = jArray.getJSONObject(i);
                 
                  //al.add(e.getString("name"));
                  // Toast.makeText(this, e.getString("name"), Toast.LENGTH_SHORT).show();
                  
                  HashMap<String, String> map = new HashMap<String, String>();
                  map.put("_id", e.getString("id"));
                  map.put("c1", e.getString("name"));
                  map.put("c2", e.getString("city"));
                  map.put("c3", e.getString("birthdate"));

                  
                  mylist.add(map); 
              }
              
           
              String[] ColumnName = new String[] { "c1", "c2", "c3" };
              int[] ColumnId = new int[] {R.id.colm1, R.id.colm2, R.id.colm3};
              
              sa = new SimpleAdapter(this, mylist, R.layout.custom_layout, ColumnName, ColumnId);
              lv.setAdapter(sa);
              
              lv.setOnItemClickListener(new OnItemClickListener() {

                public void onItemClick(AdapterView<?> arg0, View arg1,
                        int arg2, long arg3) {
                    
                    Toast.makeText(Ws.this, String.valueOf(arg2), Toast.LENGTH_SHORT).show();
                    Toast.makeText(Ws.this, String.valueOf(arg3), Toast.LENGTH_SHORT).show();
                }
            });
              
         } catch (ClientProtocolException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (JSONException e) {
             // TODO Auto-generated catch block
             e.printStackTrace(); 
         }   
    }
}

But here both arg2 & arg3 giving me the same value that is position of list. But I need the id that I have set as _id in my mylist ArrayList

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[cali]

Welcome to the site. Hope someone can help with this.

[meral]

Hello, Noone is there to help me !!! Please....

[chakdev]

Hi Meral,

I hope you have already found a solution to your problem.
To overcome your problem, you'll need to have a custom Adapter class.

In the getView() method of your custom Adapter class, tag the view with your _id from myList.
Something like this (Warning: pseudo-code. Most probably will not compile)

ArrayList<HashMap<String,String>> myList;

public View getView(int position, View convertView, ViewGroup parent) {
       View newView= inflater.inflate(R.layout.custom_layout, null, false);
        newView.setTag(myList.get(position).get("_id"));
}

Then to retrieve _id in your onItemClick definition:

lv.setOnItemClickListener(new OnItemClickListener() {


                public void onItemClick(AdapterView<?> arg0, View arg1,
                        int arg2, long arg3) {
                    
                   int _id = (int) arg1.getTag();


                    Toast.makeText(Ws.this, String.valueOf(arg2), Toast.LENGTH_SHORT).show();
                    Toast.makeText(Ws.this, String.valueOf(arg3), Toast.LENGTH_SHORT).show();
                }
            });