Question

我有一个tabBase Activity和一个Fragment。我在基地Activity中调用API，并使用模型列表类将该列表数据传递给Fragment。但我总是得到零列表。请帮帮我。

  public class ListTempStorage {

  private List<MyPojoClassList> listOne = new ArrayList<>();
  private List<MyPojoClassList> listTwo = new ArrayList<>();
  private List<MyPojoClassList> listThree = new ArrayList<>();


  public List<MyPojoClassList> getListOne() {
    return listOne;
  }
  public void setListOne(List<MyPojoClassList> listOne) {
    this.listOne = listOne;
  }
  public List<MyPojoClassList> getListTwo() {
    return listTwo;
  }

  public void setListTwo(List<MyPojoClassList> listTwo) {
    this.listTwo = listTwo;
  }


 }

我的Fragment课程：

 public class MyFragment extends Fragment {

    private ListTempStorage ourInstance;

 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container, 
 Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.my_layout, container, false);
    // Inflate the layout for this fragment
    init(v);

    return v;
   }
  private void init(View v) {
  ourInstance= new ListTempStorage ();

   try {

            List<MyPojoClassList> list = ourInstance.getListOne();
            if (list != null && list.size() > 0) {

                populateOpenAllLayout(list);


        } catch (Exception e) {
            if (OlabiConstant.IS_DEBUGGABLE) e.printStackTrace();
            activity.finish();

        }

Answer 1

您只会变空，因为在onCreateView中调用init时总是填充数据：

private void init(View v) {
  ourInstance= new ListTempStorage ();
}

您需要在获得数据后填充数据，创建一个方法：

public void populate(ListTempStorage tempStorage) {
  ourInstance = tempStorage;
  // update your data here.
}

然后，您可以从Base Activity调用方法片段。

列表模型没有获得返回列表

1 个答案: