android - fragment 中未定义的 getSupportFragmentManager()

Question

我在 getSupportFragmentManager() 上遇到错误“此方法在 Fragment 中未定义”，同时创建带有滑动选项卡的 slider 菜单我准备了如下代码..

public class HomeFragment extends Fragment {

    Toolbar toolbar;
    ViewPager viewpager;
    ViewPagerAdapter adapter;
    SlidingTabLayout tabs;
    CharSequence Titles1[] = { "Home", "Help", "Contect" };
    // int Titles[] = { R.drawable.ic_content_copy_black_24dp,
    // R.drawable.ic_refresh_black_24dp, R.drawable.ic_share_black_24dp };
    int NumOfTabs = 3;

    public HomeFragment() {
    }

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

        View rootView = inflater.inflate(R.layout.fragment_home, container,
            false);

        return rootView;

        adapter = new ViewPagerAdapter(getSupportFragmentManager(), Titles1,
            NumOfTabs);

        viewpager = (ViewPager) rootView.findViewById(R.id.pager);
        viewpager.setAdapter(adapter);

        tabs = (SlidingTabLayout) rootView.findViewById(R.id.tabs);
        tabs.setDistributeEvenly(true);
    }

我的 ViewPager 适配器类如下所示

public class ViewPagerAdapter extends FragmentStatePagerAdapter{

    CharSequence Titles1[];
    int Titles[];
    int NumbOfTabs;

    public ViewPagerAdapter(FragmentManager fm, CharSequence mTitles[], int mNumbOfTabs) {
        super(fm);
        this.Titles1 = mTitles;
        this.NumbOfTabs = mNumbOfTabs;
    }

    @Override
    public Fragment getItem(int arg0) {

        if(arg0 == 0){
            Tab1 tab1 = new Tab1();
            return tab1;
        }else if(arg0 == 1){
            Tab2 tab2 = new Tab2();
            return tab2;
        }else{
            Tab3 tab3 = new Tab3();
            return tab3;
        }
    }


    @Override
    public CharSequence getPageTitle(int position) {
        return Titles1[position];
    }

    @Override
    public int getCount() {
        return NumbOfTabs;
    }

Answer 1

只需替换:

getSupportFragmentManager()

与:

getFragmentManager()

---

如果您使用的是 android.support.v4.app.Fragment，它将返回一个 android.support.v4.app.FragmentManager (SupportFragmentManager)

如果您使用的是 android.app.Fragment，它将返回一个 android.app.FragmentManager

---

请记住，它在 Activities.Like 中的处理方式与 android.support.v4.app.FragmentActivity 中的处理方式不同。你有 getSupportFragmentManager() 和 getFragmentManager()