How to Refresh Android List Adapter, so it shows new-added items

Question

I was working on a project. It\'s just showing a list of tasks and Adding new tasks to it. I have 3 CLASSES. One for adding, One for view and One to hold all information (or

Answer 1

The solutions proposed thus far work, but are dependent on the Android version of your device. For example, to use the AddAll method you have to put android:minSdkVersion="10" in your android device.

To solve this questions for all devices I have created my on own method in my adapter and use inside the add and remove method inherits from ArrayAdapter that update you data without problems.

My Code: Using my own data class RaceResult, you use your own data model.

ResultGpRowAdapter.java

public class ResultGpRowAdapter extends ArrayAdapter {

    Context context;
    int resource;
    List data=null;

        public ResultGpRowAdapter(Context context, int resource, List objects)           {
        super(context, resource, objects);

        this.context = context;
        this.resource = resource;
        this.data = objects;
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        ........
        }

        //my own method to populate data           
        public void myAddAll(List items) {

        for (RaceResult item:items){
            super.add(item);
        }
    }

ResultsGp.java

public class ResultsGp extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {

    ...........
    ...........
    ListView list = (ListView)findViewById(R.id.resultsGpList); 

    ResultGpRowAdapter adapter = new ResultGpRowAdapter(this,  R.layout.activity_result_gp_row, new ArrayList()); //Empty data

   list.setAdapter(adapter);

   .... 
   ....
   ....
   //LOAD a ArrayList with data

   ArrayList data = new ArrayList();
   data.add(new RaceResult(....));
   data.add(new RaceResult(....));
   .......

   adapter.myAddAll(data); //Your list will be udpdated!!!