android - TabLayout 和 ViewPager - 在滑动抽屉项目之间滑动后 Tabs 不起作用

Question

TabLayout 和 ViewPager - 在滑动抽屉项目之间滑动后点击选项卡不起作用。

我开发的应用程序具有滑动抽屉和 Tablayout。我引用了这个教程 For Sliding Drawer和 For TabLayout .

内部滑动抽屉

1. 任务列表 -->TabLayout(Tabs(Today,Monthly,Yearly))
2. 设置
3. 订单

我在滑动抽屉和 Tablayout 之间遇到问题。第一次正确加载 viewpager。但是当我移动到下一个抽屉项目时(设置 fragment )然后回到任务列表选项卡 fragment viewpager 无法加载任何 fragment ，当滑动该寻呼机然后加载几个 fragment 时。

这里是 Java 代码

public class TaskListFragment extends Fragment {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;

public TaskListFragment() {
    // Required empty public constructor
}

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

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_my_page, container, false);

    viewPager = (ViewPager)rootView.findViewById(R.id.viewpager);
    tabLayout = (TabLayout)rootView.findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(viewPager);
    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 onTabReselected(TabLayout.Tab tab) {

        }
    });

    // Inflate the layout for this fragment
    return rootView;
}

private void setupViewPager(ViewPager viewPager) {
    ViewPagerAdapter adapter = new ViewPagerAdapter(getFragmentManager());
    adapter.addFragment(new Mypage_TodayFragment(), "TODAY");
    adapter.addFragment(new Mypage_TodayFragment(), "WEEKLY");
    adapter.addFragment(new Mypage_TodayFragment(), "MONTHLY");
    viewPager.setAdapter(adapter);
}

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

    public ViewPagerAdapter(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);
    }
}
@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
}

@Override
public void onDetach() {
    super.onDetach();
} 

这里.XML代码

   <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="262dp"
        android:id="@+id/view"
        android:layout_weight="0.16">

        <android.support.design.widget.TabLayout
            android:id="@+id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabMode="fixed"
            app:tabGravity="fill"
            app:tabBackground="@drawable/mytabselector"
            app:tabIndicatorColor="@color/Orange" />

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

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

提前致谢!!

Answer 1

试试这个而不是

ViewPagerAdapter 适配器 = new ViewPagerAdapter(getFragmentManager());

做

ViewPagerAdapter 适配器 = new ViewPagerAdapter(getChildFragmentManager());

这是因为你在 fragment 中有一个 viewpager，这个 viewpager 应该用来进行 fragment 事务的 fragment 管理器应该是一个 childfragmentmanager