android - configurationChange の後、フラグメント内の listView が初期化されます

Question

基本的に、私には 3 つのフラグメントがあります。1 つのフラグメントには listView と editText があり、他の 2 つのフラグメントには、linearLayout に追加ボタンとクリア ボタンがあり、水平方向と垂直方向に配置されています。

onConfigurationChanged()構成が変更されると、レイアウトを動的に変更してフラグメントを置き換えるメソッドを呼び出す必要があります。

問題は次のとおりです。回転後、listView 内のデータが初期化され、回転前に追加されたすべての項目が失われます。

メソッドを使用してみましsetRetainInstance()たが、それでもうまくいきませんでした。

これは私のコードです

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("");

  }
}