onClickListener ListView

Question

我的Contacts活动中有一个联系人列表，该列表是通过此方法填充的：

public void allyGetAllDelegate(HttpResponse response, JSONObject result)
{
    if(result != null)
    {
        ListView listContacts = (ListView) this.listContactsView.findViewById(R.id.listContacts);

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);

        JSONArray toIterate;

        try {
            toIterate = result.getJSONArray("data");

            for(int i=0; i<toIterate.length(); i++)
            {
                adapter.add(toIterate.getJSONObject(i).get("name").toString());
            }

        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        listContacts.setAdapter(adapter);
    }
}

当我执行这行代码时：

adapter.add(toIterate.getJSONObject(i).get("name").toString());

我想在每个项目上和它里面设置一个onClickListener，意在另一个具有额外toIterate.getJSONObject(i).toString()的活动。

我如何才能做到这一点？

Answer 1

尝尝这个

 @Override
protected void onListItemClick(ListView l, View v, int position, long id) {
          //Do something when an item is clicked 
}

Answer 2

您可以将JSONObject-s存储在ArrayAdapter中，并在以后检索它们。

所以你的代码变成了

public void allyGetAllDelegate(HttpResponse response, JSONObject result) {
    if(result != null)  {
    ListView listContacts = (ListView) this.listContactsView.findViewById(R.id.listContacts);

    final Mydapter adapter = new MyAdapter(this, android.R.layout.simple_list_item_1);

    JSONArray toIterate;

    try {
        toIterate = result.getJSONArray("data");

        for(int i=0; i<toIterate.length(); i++)
        {
            adapter.add(toIterate.getJSONObject(i));
        }

    } catch (JSONException e) {
         // handle exceptions here
    }

    listContacts.setAdapter(adapter);
    listContacts.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Intent i = new Intent(/*your intent*/);
            i.putExtra("extra", adapter.getItem(position).toString());
            startActivity(i);
        }
    });
    }
}

此外，您还必须扩展ArrayAdapter并覆盖它的getView

class MyAdapter extends ArrayAdapter<JSONObject> {

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater li = LayoutInflater.from(getContext());
    TextView tv = (TextView) li.inflate(android.R.layout.simple_list_item_1, null);
    tv.setText(getItem(position).get("name"));
    return tv;
}

}

Answer 3

我必须创建一个名为contacts (接收JSONArray)的静态属性。使用该属性和position参数完成。

谢谢。

listContacts.setAdapter(adapter);
listContacts.setOnItemClickListener(new OnItemClickListener()
{
    @Override
    public void onItemClick(AdapterView<?> parent, View view,
            int position, long id)
    {
        try {
            Intent intent = new Intent(view.getContext(), ContactProfile.class);
            intent.putExtra("person", Contacts.contacts.getJSONObject(position).toString());
            startActivity(intent);
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
});