Android studio 从具有ViewPager2的片段中的片段调用方法

我有这两种方法getCsList（int-position）和getStaList（int-position）

学期。java

并且每种方法都必须在Viewpager2中填充

4个片段。请问如何调用这些方法。这是我下面的。谢谢

可视寻呼机适配器
MyViewPager.java

public class MyViewPager extends FragmentStateAdapter {
List<Fragment> fragmentList = new ArrayList<>();

public MyViewPager(@NonNull FragmentManager fragmentManager, @NonNull Lifecycle lifecycle) {
    super(fragmentManager, lifecycle);
}

@NonNull
@Override
public Fragment createFragment(int position) {
    return fragmentList.get(position);
}

@Override
public int getItemCount() {
    return fragmentList.size();
}

public void addFrags(Fragment fragment) {
    fragmentList.add(fragment);
}
}

保存两个方法（每个方法都包含要填充的数据）的片段在viewpager中填充为4个片段，我如何调用这些方法：getCsList（int位置）和getStaList（int位置）fromsemestrsfragment.java？？

Serm.java

public class Semesters extends Fragment {
List mData;
RVFragment adapter;
RecyclerView recyclerView;

public Semesters() {
}

public static Semesters newInstance(int index, int position) {
    Semesters fragment = new Semesters();
    Bundle args = new Bundle();
    args.putInt("index", index);
    args.putInt("position", position);
    fragment.setArguments(args);
    return fragment;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment, container, false);
    recyclerView = view.findViewById(R.id.recyclerView);
    LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
    recyclerView.setLayoutManager(layoutManager);
    adapter = new RVFragment(getContext(), mData);
    if (getArguments().getInt("index", 0) == 0) {
        mData = getCSList(getArguments().getInt("position", 0));
    } else if (getArguments().getInt("index", 0) == 1) {
        mData = getSTAList(getArguments().getInt("position", 0));
    }
    recyclerView.setAdapter(adapter);
    return view;
}

private List getCSList(int position) {
    List list = new ArrayList<>();
    if (position == 0) { //fragment one inside viewpager whenever item1 is clicked from the recyclerView 
        list.add(new SemesterModelClass("intro. to comp", "com101", "3"));
        list.add(new SemesterModelClass("digital electonics", "com112", "3"));
        list.add(new SemesterModelClass("intro to programming", "com113", "4"));
    } else if (position == 1) { //fragment two inside viewpager whenever item1 is clicked from the recyclerView 
        list.add(new SemesterModelClass("sem2", "com111", "3"));
        list.add(new SemesterModelClass("sem2", "com222", "5"));
        list.add(new SemesterModelClass("sem2", "com121", "4"));
    } else if (position == 2) { //fragment three inside viewpager whenever item1 is clicked from the recyclerView 
        list.add(new SemesterModelClass("sem3", "com111", "3"));
        list.add(new SemesterModelClass("sem3", "com222", "5"));
        list.add(new SemesterModelClass("sem3", "com121", "4"));
    } else if (position == 3) { //fragment four inside viewpager whenever item1 is clicked from the recyclerView 
        list.add(new SemesterModelClass("sem4", "com111", "3"));
        list.add(new SemesterModelClass("sem4", "com222", "5"));
        list.add(new SemesterModelClass("sem4", "com121", "4"));
    }
    return list;
}

private List getSTAList(int position) {
    List list = new ArrayList<>();
    if (position == 4) { //fragment one inside viewpager whenever item2 is clicked from the recyclerView 
        list.add(new SemesterModelClass("probability", "STA 111", "3"));
        list.add(new SemesterModelClass("algebra", "STA 112", "4"));
        list.add(new SemesterModelClass("logic", "STA 113", "3"));
        list.add(new SemesterModelClass("geometri func", "STA 114", "4"));
    } else if (position == 5) { //fragment two inside viewpager whenever item2 is clicked from the recyclerView 
        list.add(new SemesterModelClass("set theory", "STA 111", "3"));
        list.add(new SemesterModelClass("dedvwvdv", "STA 112", "4"));
        list.add(new SemesterModelClass("fbcfvdv", "STA 113", "3"));
        list.add(new SemesterModelClass("cvsvsdvs", "STA 114", "4"));
    } else if (position == 6) { //fragment three inside viewpager whenever item2 is clicked from the recyclerView 
        list.add(new SemesterModelClass("geo", "STA 111", "3"));
        list.add(new SemesterModelClass("semdvbv3", "STA 112", "4"));
        list.add(new SemesterModelClass("dedgsedv", "STA 113", "3"));
        list.add(new SemesterModelClass("frgs", "STA 114", "4"));
    } else if (position == 7) { //fragment four inside viewpager whenever item2 is clicked from the recyclerView 
        list.add(new SemesterModelClass("log", "STA 111", "3"));
        list.add(new SemesterModelClass("sem4fff", "STA 112", "4"));
        list.add(new SemesterModelClass("sem4gtgg", "STA 113", "3"));
        list.add(new SemesterModelClass("sem4uku", "STA 114", "4"));
    }
    return list;
}
}

公共课学期{
列出mData；
裂片接合器；
回收视图回收视图；
公共学期（）{
}
公共静态学期newInstance（int索引，int位置）{
学期片段=新学期（）；
Bundle args=新Bundle（）；
参数putInt（“索引”，索引）；
参数putInt（“位置”，位置）；
fragment.setArguments（args）；
返回片段；
}
@凌驾
CreateView上的公共视图（布局、充气机、视图组容器、捆绑包保存状态）{
视图=充气机。充气（R.layout.fragment，container，false）；
recyclerView=view.findViewById（R.id.recyclerView）；
LinearLayoutManager布局管理器=新的LinearLayoutManager（getContext（））；
recyclerView.setLayoutManager（layoutManager）；
适配器=新的RVFragment（getContext（），mData）；
if（getArguments（）.getInt（“index”，0）=0）{
mData=getCSList（getArguments（）.getInt（“位置”，0））；
}else if（getArguments（）.getInt（“index”，0）==1）{
mData=getSTAList（getArguments（）.getInt（“位置”，0））；
}
recyclerView.setAdapter（适配器）；
返回视图；
}
私有列表getCSList（int位置）{
列表=新的ArrayList（）；
如果（position==0）{//每当从recyclerView中单击item1时，都会在viewpager中生成一个片段
添加（新的SemesterModelClass（“comp简介”、“com101”、“3”）；
增加（新的SemesterModelClass（“数字电子”、“com112”、“3”）；
添加（新的SemesterModelClass（“编程简介”、“com113”、“4”）；
}else如果（position==1）{//每当从recyclerView中单击item1时，viewpager中的片段2
添加（新的SemesterModelClass（“sem2”、“com111”、“3”）；
添加（新的SemesterModelClass（“sem2”、“com222”、“5”）；
添加（新的SemesterModelClass（“sem2”、“com121”、“4”）；
}else如果（position==2）{//每当从recyclerView中单击item1时，viewpager内的片段3
添加（新的SemesterModelClass（“sem3”、“com111”、“3”）；
添加（新的SemesterModelClass（“sem3”、“com222”、“5”）；
添加（新的SemesterModelClass（“sem3”、“com121”、“4”）；
}else如果（position==3）{//每当从recyclerView中单击item1时，viewpager内的片段4
添加（新的SemesterModelClass（“sem4”、“com111”、“3”）；
添加（新的SemesterModelClass（“sem4”、“com222”、“5”）；
添加（新的SemesterModelClass（“sem4”、“com121”、“4”）；
}
退货清单；
}
私有列表getSTAList（内部位置）{
列表=新的ArrayList（）；
如果（position==4）{//每当从recyclerView中单击item2时，都会在viewpager中生成一个片段
添加（新的SemesterModelClass（“概率”、“STA 111”、“3”）；
添加（新的SemesterModelClass（“代数”、“STA 112”、“4”）；
添加（新的SemesterModelClass（“逻辑”、“STA 113”、“3”）；
添加（新的SemesterModelClass（“Geometric func”、“STA 114”、“4”）；
}else如果（position==5）{//每当从recyclerView中单击item2时，viewpager内的片段2
添加（新的SemesterModelClass（“集合论”、“STA 111”、“3”）；
添加（新的SemesterModelClass（“dedvwvdv”、“STA 112”、“4”）；
添加（新的SemesterModelClass（“fbcfvdv”、“STA 113”、“3”）；
添加（新的SemesterModelClass（“cvsvsdvs”、“STA 114”、“4”）；
}else如果（position==6）{//每当从recyclerView中单击item2时，viewpager内的片段3
添加（新的SemesterModelClass（“geo”、“STA 111”、“3”）；
添加（新的SemesterModelClass（“semdvbv3”、“STA 112”、“4”）；
添加（新的SemesterModelClass（“dedgsedv”、“STA 113”、“3”）；
增加（新的SemesterModelClass（“frgs”、“STA 114”、“4”）；
}else如果（position==7）{//每当从recyclerView中单击item2时，viewpager内的片段4
添加（新的SemesterModelClass（“日志”、“STA 111”、“3”）；
添加（新的SemesterModelClass（“sem4fff”、“STA 112”、“4”）；
添加（新的SemesterModelClass（“sem4gtgg”、“STA 113”、“3”）；
添加（新的SemesterModelClass（“sem4uku”、“STA 114”、“4”）；
}
退货清单；
}
}

public class Semesters extends Fragment {
List mData;
RVFragment adapter;
RecyclerView recyclerView;

public Semesters() {
}

public static Semesters newInstance(int index, int position) {
    Semesters fragment = new Semesters();
    Bundle args = new Bundle();
    args.putInt("index", index);
    args.putInt("position", position);
    fragment.setArguments(args);
    return fragment;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment, container, false);
    recyclerView = view.findViewById(R.id.recyclerView);
    LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
    recyclerView.setLayoutManager(layoutManager);
    adapter = new RVFragment(getContext(), mData);
    if (getArguments().getInt("index", 0) == 0) {
        mData = getCSList(getArguments().getInt("position", 0));
    } else if (getArguments().getInt("index", 0) == 1) {
        mData = getSTAList(getArguments().getInt("position", 0));
    }
    recyclerView.setAdapter(adapter);
    return view;
}

private List getCSList(int position) {
    List list = new ArrayList<>();
    if (position == 0) { //fragment one inside viewpager whenever item1 is clicked from the recyclerView 
        list.add(new SemesterModelClass("intro. to comp", "com101", "3"));
        list.add(new SemesterModelClass("digital electonics", "com112", "3"));
        list.add(new SemesterModelClass("intro to programming", "com113", "4"));
    } else if (position == 1) { //fragment two inside viewpager whenever item1 is clicked from the recyclerView 
        list.add(new SemesterModelClass("sem2", "com111", "3"));
        list.add(new SemesterModelClass("sem2", "com222", "5"));
        list.add(new SemesterModelClass("sem2", "com121", "4"));
    } else if (position == 2) { //fragment three inside viewpager whenever item1 is clicked from the recyclerView 
        list.add(new SemesterModelClass("sem3", "com111", "3"));
        list.add(new SemesterModelClass("sem3", "com222", "5"));
        list.add(new SemesterModelClass("sem3", "com121", "4"));
    } else if (position == 3) { //fragment four inside viewpager whenever item1 is clicked from the recyclerView 
        list.add(new SemesterModelClass("sem4", "com111", "3"));
        list.add(new SemesterModelClass("sem4", "com222", "5"));
        list.add(new SemesterModelClass("sem4", "com121", "4"));
    }
    return list;
}

private List getSTAList(int position) {
    List list = new ArrayList<>();
    if (position == 4) { //fragment one inside viewpager whenever item2 is clicked from the recyclerView 
        list.add(new SemesterModelClass("probability", "STA 111", "3"));
        list.add(new SemesterModelClass("algebra", "STA 112", "4"));
        list.add(new SemesterModelClass("logic", "STA 113", "3"));
        list.add(new SemesterModelClass("geometri func", "STA 114", "4"));
    } else if (position == 5) { //fragment two inside viewpager whenever item2 is clicked from the recyclerView 
        list.add(new SemesterModelClass("set theory", "STA 111", "3"));
        list.add(new SemesterModelClass("dedvwvdv", "STA 112", "4"));
        list.add(new SemesterModelClass("fbcfvdv", "STA 113", "3"));
        list.add(new SemesterModelClass("cvsvsdvs", "STA 114", "4"));
    } else if (position == 6) { //fragment three inside viewpager whenever item2 is clicked from the recyclerView 
        list.add(new SemesterModelClass("geo", "STA 111", "3"));
        list.add(new SemesterModelClass("semdvbv3", "STA 112", "4"));
        list.add(new SemesterModelClass("dedgsedv", "STA 113", "3"));
        list.add(new SemesterModelClass("frgs", "STA 114", "4"));
    } else if (position == 7) { //fragment four inside viewpager whenever item2 is clicked from the recyclerView 
        list.add(new SemesterModelClass("log", "STA 111", "3"));
        list.add(new SemesterModelClass("sem4fff", "STA 112", "4"));
        list.add(new SemesterModelClass("sem4gtgg", "STA 113", "3"));
        list.add(new SemesterModelClass("sem4uku", "STA 114", "4"));
    }
    return list;
}
}