Question

这是我的第一个通过xml布局打开片段的片段

public class ListFrag extends SherlockFragment implements OnItemClickListener
{
    Context c;
    List<ReferalRow> referal_RowItems;
    DoctorDaoImpl doctorDao;
    DoctorServiceImpl service;
    DoctorValidator doctorValidator;
    View layoutView;
    ListView doctoListView;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        layoutView = inflater.inflate(R.layout.activity_refer_mangmnt, null);
        return layoutView;
    }

这是我的activity_refer_mangmnt。xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
   android:padding="5dp" >

 <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" 
        android:layout_weight="2"

        android:padding="2dp">
    <ListView
        android:id="@+id/listView_refer_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:dividerHeight="1dp"
        android:divider="@android:color/black"
        android:choiceMode="singleChoice"
        android:listSelector="@drawable/list_selector" />
    </LinearLayout>
<LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_weight="1"
    android:background="@drawable/rightpanel_back">
 <fragment
     android:id="@+id/detail_fragment"
     android:tag="detailfrag"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     class="com.example.app1.DetailsFrag" />
 </LinearLayout>
`</LinearLayout>

这是我的DetailFrag类

public class DetailsFrag extends SherlockFragment
{
    ExpandableListView detailList;
    TextView tvMessage;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    contentView = inflater.inflate(R.layout.activity_refer_view, null);
    detailList = (ExpandableListView) contentView.findViewById(R.id.ep_detail_view);
    tvMessage = (TextView)contentView.findViewById(R.id.tv_textView);
    return contentView;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    if(id==0)
    {
        detailList.setVisibility(View.GONE);
        tvMessage.setText("Click on the item on the left panel to view the details");
    }
    else
    {
        detailList.setVisibility(View.VISIBLE);
        tvMessage.setVisibility(View.GONE);
}

这是我在LIstFrag中的onItem点击监听器

FragmentTransaction ft = getFragmentManager().beginTransaction();
        Fragment lastFrag = getFragmentManager().findFragmentByTag("detailfrag");
        if(lastFrag!=null)
        ft.remove(lastFrag);
        Fragment fragment = Fragment.instantiate(c, DoctorDetailsFrag.class.getName(),arguments);
        ft.replace(R.id.detail_fragment, fragment);
        ft.commit();

我需要第一次想要在单击面板中的项目后在右侧面板中显示消息我想要消失该消息。但是这里的消息不会从片段中删除。它显示在新片段的背景中。是的吗？

Answer 1

尝试：

ft.addToBackStack(null)

致电后：ft.remove（lastFrag）;

也许此链接可以帮助您理解此交易： http://developer.android.com/guide/components/fragments.html#Transactions

另一种方法是在不为null时重用你的lastFrag。然后，您需要一个从您的clickListener调用的DetailFrag中的方法。

我的片段仍在UI中

1 个答案: