相关疑难解决方法(0)

我的类继承了Fragment,这就是为什么它不能使用getSupportFragmentManager().我正在使用getChildFragmentManager,它显示错误 - IllegalArguementException:找不到id ...错误的视图.

任何指导将不胜感激.

调用AttachmentsListFragment的代码是

Bundle b = new Bundle();
b.putSerializable("AttachmentsList", msg.attachments);  
        AttachmentListFragment listfrag = new AttachmentListFragment(msg.attachments);
FragmentTransaction transaction = getFragmentManager().beginTransaction();       
transaction.add(R.id.attachmentslistcontainer, listfrag);
transaction.addToBackStack(null);
transaction.commit();

attachmentslayout.xml是

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/attachmentslistcontainer"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textViewAttachmentHeader"
        style="@style/Normal.Header.Toolbar"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@color/list_separator_background"
        android:ellipsize="end"
        android:gravity="center"
        android:maxLines="2"
        android:text="@string/attachments_header"
        android:textColor="#FFFFFFFF"
        android:textSize="22sp"
        android:textStyle="bold"
        android:visibility="visible" />

    <ListView
        android:id="@android:id/list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >
    </ListView>

</FrameLayout>

AttachmentsListFragment.java

public class AttachmentListFragment extends ListFragment implements IAttachmentsData {

    ArrayList<Attachments> items = null;
    Integer cellLayoutID;
    Integer index;

    public AttachmentListFragment() {

    } …

我在我的一个片段中使用TabLayout,并使用viewPager在标签下方的两个片段之间切换.

当我单击其中一个较低片段中的FAB时,我加载一个新片段(用于输入).

但是 - 当我按下BACK按钮时,TabLayout会显示但没有任何一个较低的片段(由页面表示).

那么我做错了什么？

• 是否有更好的方式来交换片段？
• 有没有办法按后退按钮并返回正在显示的viewPager页面？

使用TabLayout的片段:CustomTemplatesFragment

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view =  inflater.inflate(R.layout.fragment_custom_templates, container, false);
    final TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tab_layout);
    tabLayout.addTab(tabLayout.newTab().setText(R.string.macro_tab));
    tabLayout.addTab(tabLayout.newTab().setText(R.string.lifestyle_tab));
    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

    final ViewPager viewPager = (ViewPager) view.findViewById(R.id.pager);
    final CustomTemplatesPagerAdapter adapter = new CustomTemplatesPagerAdapter
            (getFragmentManager(), tabLayout.getTabCount());
    viewPager.setAdapter(adapter);
    viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
    tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            viewPager.setCurrentItem(tab.getPosition());
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {

        }

        @Override
        public void …