Question

I understand that there’s a set of methods used to pass data from one activity to the next using, but how do I model it from within the activity with the list view?

Example: I have a json object which i use to populate a listview. Each list item has an id. I want to pass the id to the next activity on click. How do I know that listview’s item id? I wasn’t sure how to attach arbitrary metadata to a listview item and immediately grab it and pass it along.

public class StuffListActivity extends ListActivity
{
    private MyApplication application = null;

    /**
     * Called when the activity is first created.
     *
     * @param savedInstanceState the saved instance state
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        application = ((Application) getApplication());
        Requestor req = new Requestor();
        Application.log(listType.toString());
        ArrayList<String> list = req.getStuff(application.getId(), listType);

        adapter = new ArrayAdapter<String>(this,
                R.layout.list, R.id.stuff, list);
        setListAdapter(adapter);    
    }

    protected void onListItemClick(ListView l, View v, int position, long id) 
    {
        String item = (String) getListAdapter().getItem(position);
        Toast.makeText(this, item + " selected", Toast.LENGTH_LONG).show();
    }
}

Answer 1

Use setTag() and getTag() property for list view in Adapter getView() code.. to store and retrieve the data.