android - configurationChange之后，fragment中的listView会被初始化

Question

基本上，我有 3 个片段：一个片段有 listView 和 editText，另外两个片段在线性布局中有添加和清除按钮，水平方向和另一个垂直方向。

当配置发生变化时，它应该调用onConfigurationChanged()方法，该方法会动态改变布局并替换片段。

问题是这样的：旋转后，listView中的数据被初始化，旋转前添加的所有项目都消失了。

我尝试使用该setRetainInstance()方法，但仍然无效。

这是我的代码

MainActivity.java

  public class MainActivity extends Activity implements MyControlInterface {

  myListFragment check;
  FragmentTransaction fragmentTransaction;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    FragmentManager fragmentManager = getFragmentManager();

    check = (myListFragment) fragmentManager.findFragmentById(R.id.list_container);

    if (check == null) {
        Configuration a = getResources().getConfiguration();
          if (a.orientation == Configuration.ORIENTATION_LANDSCAPE) 
          {
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.add(R.id.list_container, new myListFragment());
        fragmentTransaction.add(R.id.control_container,new verticalControlFragment());
        fragmentTransaction.commit();
          } else if (a.orientation == Configuration.ORIENTATION_PORTRAIT)
          {
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.add(R.id.list_container, new myListFragment());
        fragmentTransaction.add(R.id.control_container,new horizontalControlFragment());
        fragmentTransaction.commit();
          }
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

    @Override
    public void onConfigurationChanged(Configuration newConfig)
    {
      super.onConfigurationChanged(newConfig);
      setContentView(R.layout.activity_main);

      FragmentManager fragmentManager = getFragmentManager();

        if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) 
        {
          FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
          fragmentTransaction.add(R.id.list_container, new myListFragment());
          fragmentTransaction.replace(R.id.control_container,new verticalControlFragment());
      fragmentTransaction.commit();
        } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT)
        {
          FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
          fragmentTransaction.add(R.id.list_container, new myListFragment());
          fragmentTransaction.replace(R.id.control_container,new horizontalControlFragment());
      fragmentTransaction.commit();
        }
    }

  public void ProcessCommand(int cmd) { 
    FragmentManager fragmentManager = getFragmentManager();
    check = (myListFragment) fragmentManager.findFragmentById(R.id.list_container);
      if (cmd==1) {
        check.AddItem();
      }
      else if (cmd==2) {
        check.ClearEditBox();
      }
    }

}

MyListFragment.java

public class myListFragment extends Fragment {

  ListView myListView;
  EditText myEditText;

  private ArrayList<String> items = null;
    private ArrayAdapter<String> adapter = null;
    private String[] temp = null;


    @Override
    public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         //this.setRetainInstance(true);
    }

  @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment1, null);
    //this.setRetainInstance(true);
    return view;
    }


  @Override
  public  void onActivityCreated(Bundle savedInstanceState) {  
        super.onActivityCreated(savedInstanceState);
        //setRetainInstance(true);

        temp = getResources().getStringArray(R.array.ToDoList);
        items = new ArrayList<String>(Arrays.asList(temp));        

    myListView = (ListView) getActivity().findViewById(R.id.listView1);
    myEditText = (EditText) getActivity().findViewById(R.id.editText1);
    myEditText.setText("Input new item.");

    adapter = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,items);
        myListView.setAdapter(adapter);        

  }


  public void AddItem()
  {

    items.add(myEditText.getText().toString());
    myEditText.setText("");
    myListView.setAdapter(adapter);

  }

  public void ClearEditBox()
  {

    myEditText.setText("");

  }
}