小编Chi*_*ayu的帖子

嘿伙计们请调查此事.我坚持解决这个问题.

我使用TabLayout和设置了片段标签ViewPager.问题是当我移动到下一个片段然后我按下后退按钮我得到空标签视图.

在这里我附上我的代码.

home.xml

<?xml version="1.0" encoding="utf-8"?>

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical">


    <android.support.design.widget.TabLayout
        android:id="@+id/tabLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        android:minHeight="?attr/actionBarSize"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:tabIndicatorColor="@android:color/white"
        app:tabIndicatorHeight="4dp" />

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="fill_parent" />

    </LinearLayout>`

home.java(片段)

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.home, container, false);

    ((Drawer) getActivity()).setActionBarTitle("Home");

    Toast.makeText(getActivity(), "entry count" +    getActivity().getSupportFragmentManager().getBackStackEntryCount(), Toast.LENGTH_SHORT).show();


    tabLayout = (TabLayout) view.findViewById(R.id.tabLayout);

    tabLayout.addTab(tabLayout.newTab().setText("Products"));

    tabLayout.addTab(tabLayout.newTab().setText("Category"));

    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);


    viewPager = (ViewPager) view.findViewById(R.id.pager);
    Pager adapter = new Pager(getActivity().getSupportFragmentManager(), tabLayout.getTabCount()); …