java - 将对象从异步线程传递到 fragment 类

Question

public SimpleAsyncTask(JSONObject obj, Activity activity) {
    this.obj = obj;
    this.activity = activity;
}

@Override
protected String doInBackground(String...params) {    
    String result = "";    
    return result;
}

@Override
protected void onPostExecute(String result) {
    List<Appointments> lists = new ArrayList<Appointments>();
    return lists;
}

@Override
protected void onPreExecute() {

}

我从 MainUI 线程调用我的 AsyncTask 线程。我有一个带有 listView 的 fragment 类，我如何将 List 传递给我的 Fragment 类。

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

Answer 1

只需将列表变量设置为 Fragment 类的成员，而不是限制在 AsyncTask 内

像这样:

public class MyFragment extends Fragment {

    private List<Appointments> lists = new ArrayList<Appointments>();
    ......

然后在您的 AsyncTask 中，按如下方式使用它:

    @Override
    protected void onPostExecute(String result) {
        // Not instantiating it from scratch, but using the class variable
        lists = new ArrayList<Appointments>();
        return lists;
     }