片段内的片段选项卡

Question

我在我的主要活动中使用片段(使用Material Design)使用选项卡进行操作栏导航,如下所示,但是现在我希望在片段中有Tab导航...

// Add Fragments to Tabs in Main Activity
private void setupViewPager(ViewPager viewPager) {
    Adapter adapter = new Adapter(getSupportFragmentManager());
    adapter.addFragment(new FeedsFragment(), "Latest Updates");
    adapter.addFragment(new ClubTeamsFragment(), "Club Teams");
    adapter.addFragment(new FixturesFragment(), "Fixtures");
    adapter.addFragment(new ResultsFragment(), "Results");
    adapter.addFragment(new ClubFieldsFragment(), "Club Fields");
    viewPager.setAdapter(adapter);
}

我很确定TabHost现已弃用.

我希望实现附加图像.蓝色选项卡位于主活动级别,灰色日期选项卡位于选定的片段视图中.

我读过一些关于使用Tab Host或Fragment Activity的帖子,还是使用扩展到Fragment的Activity？

Answer 1

请参阅我在MainActivity中使用片段选项卡中的片段选项卡所获得的答案

在我的片段里面使用getChildFragmentManager()

public class FixturesTabs extends Fragment {

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

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

    View view = inflater.inflate(R.layout.fixtures_new_tabs,container, false);
    // Setting ViewPager for each Tabs
    ViewPager viewPager = (ViewPager) view.findViewById(R.id.viewpager);
    setupViewPager(viewPager);
    // Set Tabs inside Toolbar
    TabLayout tabs = (TabLayout) view.findViewById(R.id.result_tabs);
    tabs.setupWithViewPager(viewPager);


    return view;

}


// Add Fragments to Tabs
private void setupViewPager(ViewPager viewPager) {


    Adapter adapter = new Adapter(getChildFragmentManager());
    adapter.addFragment(new TodaysFixturesFragment(), "Today");
    adapter.addFragment(new WeekFixturesFragment(), "Week");
    adapter.addFragment(new MonthFixturesFragment(), "Month");
    adapter.addFragment(new AllFixturesFragment(), "Month");
    adapter.addFragment(new MyTeamsFixturesFragment(), "My Teams");
    viewPager.setAdapter(adapter);



}

static class Adapter extends FragmentPagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();

    public Adapter(FragmentManager manager) {
        super(manager);
    }

    @Override
    public Fragment getItem(int position) {
        return mFragmentList.get(position);
    }

    @Override
    public int getCount() {
        return mFragmentList.size();
    }

    public void addFragment(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return mFragmentTitleList.get(position);
    }
}



}

我的XML命名为"fixtures_new_tabs.xml"以匹配膨胀的布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">


<android.support.design.widget.CoordinatorLayout
    android:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.TabLayout
            android:id="@+id/result_tabs"
            android:background="@color/grey"
            app:tabTextColor="@color/medium_grey"
            app:tabSelectedTextColor="@color/colorPrimary"
            app:tabIndicatorColor="@color/colorPrimary"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabMode="scrollable"/>
    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

</android.support.design.widget.CoordinatorLayout>

</RelativeLayout>

希望这有助于或指出其他人的解决方案..

PS如果在执行此操作后出现白屏,则可能已将相同的父片段添加到其子片段中.