Java RecyclerView项目不会同时更改可见性

每当单击某个特定按钮时，我都会尝试显示或隐藏我的RecyclerView项目，但由于某些原因，什么也没有发生。我甚至尝试使用

adapter.notifyDataSetChanged（）。单击必要的按钮（全部展开或全部折叠）时，需要修复哪些内容才能使此回收视图中的所有项目可见或消失


公共类MyFragment扩展了android.support.v4.app.Fragment{
私有静态最终字符串标记=MyActivity.class.getSimpleName（）；
公共布尔值被否决了；
私有静态最终整数项_TYPE=100；
专用静态最终整型标头_TYPE=101；
私有静态最终整数头类型=102；
私有静态最终int INTRO_TYPE=103；
公共MyFragment（）{}
@凌驾
创建视图时的公共视图（LayoutFlater充气机、@Nullable ViewGroup容器、@Nullable Bundle savedInstanceState）{
返回充气机。充气（右布局图。碎片_rv，容器，假）；
}
@凌驾
ActivityCreated上的公共无效（@Nullable Bundle savedinStateCState）{
视图v=getView（）；
断言v！=null；
recyclerView=v.findViewById（R.id.my\u recyclerView）；
setLayoutManager（新的LinearLayoutManager（getActivity（），LinearLayoutManager.VERTICAL，false））；
//吊环
int[]attrS={R.attr.spannablestringtextColor}；
TypedArray ta=getActivity（）.getTheme（）.ActainStyledAttributes（属性）；
int colorSS=ta.getColor（0，Color.BLACK）；//Color.BLACK-默认值（颜色将根据所选主题自动更改）
Log.d（标记“clickMethod 1）”+Integer.tohextString（colorSS））；
ta.recycle（）；
//SpannableString（开始）
SpannableStringBuilder ssb1=新的SpannableStringBuilder（）；
SpannableString str1a=新的SpannableString（getString）（R.string.placeholder 1\u placeholder 2\u placeholder 3，
，getString（R.string.title_1a），“”）；
str1a.setSpan（新背景色SPAN（Color.BLACK），0，str1a.length（），Spannable.SPAN_EXCLUSIVE_EXCLUSIVE）；
str1a.setSpan（新的ForegroundColorSpan（ContextCompat.getColor（getContext（），R.color.yellow）），0，str1a.length（），Spannable.SPAN_EXCLUSIVE_EXCLUSIVE）；
ssb1.追加（str1a）；
SpannableString str1b=新的SpannableString（“+getString（R.string.title_1b））；
str1b.setSpan（新的ForegroundColorSpan（colorSS），0，str1b.length（），0）；
ssb1.追加（str1b）；
//吊杆吊环（完）
//SpannableString（开始）
SpannableStringBuilder ssb2=新的SpannableStringBuilder（）；
SpannableString str2a=新的SpannableString（getString（R.string.title_2a））；
str2a.setSpan（新背景色SPAN（Color.BLACK），0，str2a.length（），Spannable.SPAN_EXCLUSIVE_EXCLUSIVE）；
str2a.setSpan（新的ForegroundColorSpan（ContextCompat.getColor（getContext（），R.color.yellow）），0，str2a.length（），Spannable.SPAN_EXCLUSIVE_EXCLUSIVE）；
附加（str2a）；
SpannableString str2b=新的SpannableString（“，”+getString（R.string.title_2b））；
str2b.setSpan（新的ForegroundColorSpan（colorSS），0，str2b.length（），0）；
附加（str2b）；
//吊杆吊环（完）
//初始数据
dataTitle=新的ArrayList（）；
dataTitle.add（ssb1）；
dataTitle.add（ssb2）；
add（getString（R.string.title_c））；
add（getString（R.string.title_d））；
dataSubtitle=newarraylist（）；
add（getString（R.string.subtitle_a））；
add（getString（R.string.subtitle_b））；
add（getString（R.string.subtitle_c））；
add（getString（R.string.subtitle_d））；
dataDescription=新建ArrayList（）；
dataDescription.add（getString（R.string.description_a））；
添加（getString（R.string.description_b））；
dataDescription.add（getString（R.string.description_c））；
添加（getString（R.string.description_d））；
adapter=createAdapter（）；
recyclerView.setAdapter（适配器）；
super.onActivityCreated（savedInstanceState）；
}
回收视图回收视图；
ArrayList数据标题；
ArrayList数据子标题；
ArrayList数据描述；
RecyclerView.适配器；
//创建适配器
private RecyclerView.Adapter createAdapter（）{
返回新的RecyclerView.Adapter（）{
公共布尔扩展all；
公共布尔拼贴墙；
@非空
@凌驾
public MyFragment.ViewHolder onCreateViewHolder（@NonNull ViewGroup父级，int类型）{
开关（类型）{
案例标题类型：
返回新的MyFragment.ViewHolder（充气助手（R.layout.recyclerview_标题，父项））；
案例标题类型2：
返回新的MyFragment.ViewHolder（充气助手（R.layout.recyclerview_标题，父项））；
案例项目类型：
返回新的MyFragment.ViewHolder（充气助手（R.layout.recyclerview_item_tv_itemtype，父项））；
案例介绍类型：
返回新的MyFragment.ViewHolder（充气助手（R.layout.recyclerview_item_tv_intro，parent））；
违约：
返回新选项卡FragmentWatTerminus.ViewHolder（充气助手（R.layout.recyclerview_item_tv_itemtype，父项））；
}
}
@凌驾
public void onBindViewHolder（@NonNull final MyFragment.ViewHolder-ViewHolder，int位置）{
最终字体iconFont=FontManager.getTypeface（getContext（），FontManager.FontManager）；
最终RelativeLayout rInformation=viewHolder.itemView.findViewById（R.id.rl_信息）；
开关（getItemViewType（位置））{
病例HEA
public class MyFragment extends android.support.v4.app.Fragment {
    private static final String TAG = MyActivity.class.getSimpleName();

    public Boolean isSupposedToBeCollapsed;
    private static final int ITEM_TYPE = 100;
    private static final int HEADER_TYPE = 101;
    private static final int HEADER_TYPE_2 = 102;
    private static final int INTRO_TYPE = 103;

    public MyFragment() {}

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

        return inflater.inflate(R.layout.fragment_rv, container, false);
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        View v = getView();
        assert v != null;

        recyclerView = v.findViewById(R.id.my_recyclerview);
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false));

        // SpannableStrings
        int[] attrS = {R.attr.spannablestringtextColor};
        TypedArray ta = getActivity().getTheme().obtainStyledAttributes(attrS);
        int colorSS = ta.getColor(0, Color.BLACK); //Color.BLACK - default value (colour will change automatically depending on chosen theme)
        Log.d(TAG, "clickMethod 1) " + Integer.toHexString(colorSS));
        ta.recycle();


        // SpannableString (start)
        SpannableStringBuilder ssb1 = new SpannableStringBuilder();

        SpannableString str1a = new SpannableString(getString(R.string.placeholder1_placeholder2_placeholder3,
                " ", getString(R.string.title_1a), " "));
        str1a.setSpan(new BackgroundColorSpan(Color.BLACK), 0, str1a.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        str1a.setSpan(new ForegroundColorSpan(ContextCompat.getColor(getContext(), R.color.yellow)), 0, str1a.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        ssb1.append(str1a);

        SpannableString str1b = new SpannableString(" " + getString(R.string.title_1b));
        str1b.setSpan(new ForegroundColorSpan(colorSS), 0, str1b.length(), 0);
        ssb1.append(str1b);
        // SpannableString (end)


        // SpannableString (start)
        SpannableStringBuilder ssb2 = new SpannableStringBuilder();

        SpannableString str2a = new SpannableString(getString(R.string.title_2a));
        str2a.setSpan(new BackgroundColorSpan(Color.BLACK), 0, str2a.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        str2a.setSpan(new ForegroundColorSpan(ContextCompat.getColor(getContext(), R.color.yellow)), 0, str2a.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        ssb2.append(str2a);

        SpannableString str2b = new SpannableString(", " + getString(R.string.title_2b));
        str2b.setSpan(new ForegroundColorSpan(colorSS), 0, str2b.length(), 0);
        ssb2.append(str2b);
        // SpannableString (end)


        // init data
        dataTitle = new ArrayList<>();
        dataTitle.add(ssb1);
        dataTitle.add(ssb2);
        dataTitle.add(getString(R.string.title_c));
        dataTitle.add(getString(R.string.title_d));

        dataSubtitle = new ArrayList<>();
        dataSubtitle.add(getString(R.string.subtitle_a));
        dataSubtitle.add(getString(R.string.subtitle_b));
        dataSubtitle.add(getString(R.string.subtitle_c));
        dataSubtitle.add(getString(R.string.subtitle_d));

        dataDescription = new ArrayList<>();
        dataDescription.add(getString(R.string.description_a));
        dataDescription.add(getString(R.string.description_b));
        dataDescription.add(getString(R.string.description_c));
        dataDescription.add(getString(R.string.description_d));

        adapter = createAdapter();

        recyclerView.setAdapter(adapter);

        super.onActivityCreated(savedInstanceState);
    }

    RecyclerView recyclerView;
    ArrayList<CharSequence> dataTitle;
    ArrayList<String> dataSubtitle;
    ArrayList<String> dataDescription;
    RecyclerView.Adapter<MyFragment.ViewHolder> adapter;


    // creates the adapter
    private RecyclerView.Adapter<MyFragment.ViewHolder> createAdapter() {
        return new RecyclerView.Adapter<TabFragmentWATTerminus.ViewHolder>() {
            public Boolean expandedAll;
            public Boolean collapsedAll;

            @NonNull
            @Override
            public MyFragment.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int type) {
                switch (type) {
                    case HEADER_TYPE:
                        return new MyFragment.ViewHolder(inflateHelper(R.layout.recyclerview_header, parent));

                    case HEADER_TYPE_2:
                        return new MyFragment.ViewHolder(inflateHelper(R.layout.recyclerview_header, parent));

                    case ITEM_TYPE:
                        return new MyFragment.ViewHolder(inflateHelper(R.layout.recyclerview_item_tv_itemtype, parent));

                    case INTRO_TYPE:
                        return new MyFragment.ViewHolder(inflateHelper(R.layout.recyclerview_item_tv_intro, parent));

                    default:
                        return new TabFragmentWATTerminus.ViewHolder(inflateHelper(R.layout.recyclerview_item_tv_itemtype, parent));
                }
            }


            @Override
            public void onBindViewHolder(@NonNull final MyFragment.ViewHolder viewHolder, int position) {
                final Typeface iconFont = FontManager.getTypeface(getContext(), FontManager.FONTAWESOME);

                final RelativeLayout rlInformation = viewHolder.itemView.findViewById(R.id.rl_information);


                switch (getItemViewType(position)) {
                    case HEADER_TYPE:
                        Button expandButton = viewHolder.itemView.findViewById(R.id.button);
                        expandButton.setText(R.string.expand_all);

                    expandButton.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            if(expandedAll){
                                expandedAll = true;
                                expandRL(rlInformation, txtArrowTV);
                                adapter.notifyDataSetChanged();
                            } else if(collapsedAll){
                                collapsedAll = true;
                                collapseRL(rlInformation, txtArrowTV);
                                adapter.notifyDataSetChanged();
                            }
                        }
                    });

                        break;
                    case HEADER_TYPE_2:
                        Button collapseButton = viewHolder.itemView.findViewById(R.id.button);
                        collapseButton.setText(R.string.collapse_all);

                        collapseButton.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {
                            if(rlInformation.getVisibility() == View.VISIBLE){                                                                                 collapseRL(rlInformation, txtArrowTV);
                                    adapter.notifyDataSetChanged();
                            }
                        });
                        break;
                    case INTRO_TYPE:
                        TextView tvIntroA = viewHolder.itemView.findViewById(R.id.tv_placeholder;
                        tvIntroA.setVisibility(View.GONE);
                        break;
                    case ITEM_TYPE:
                        // get the current item
                        CharSequence itemA = dataTitle.get(position - 3);
                        String itemB = dataSubtitle.get(position - 3);
                        String itemC = dataDescription.get(position - 3);

                        //
                        final TextView txtTitle = viewHolder.itemView.findViewById(R.id.tv_title);
                        txtTitle.setText(itemA);

                        final TextView txtSubtitle = viewHolder.itemView.findViewById(R.id.tv_subtitle);
                        txtSubtitle.setText(itemB);

                        final TextView txtDescription = viewHolder.itemView.findViewById(R.id.tv_description);
                        txtDescription.setText(itemC);

                        final TextView txtArrowTV = viewHolder.itemView.findViewById(R.id.tv_expandcollapsearrow);
                        txtArrowTV.setText(R.string.fa_icon_chevron_down);
                        txtArrowTV.setTypeface(iconFont);

//                        final RelativeLayout rlInformation = viewHolder.itemView.findViewById(R.id.rl_information);
                        rlInformation.setVisibility(View.GONE);

                        //
                        CardView cardView = viewHolder.itemView.findViewById(R.id.cardview_item);
                        LinearLayout mLinearLayoutTV = viewHolder.itemView.findViewById(R.id.cardview_titlerow);

                        //
                        cardView.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                if(rlInformation.getVisibility() == View.GONE){
                                    expandRL(rlInformation, txtArrowTV);
                                } else {
                                    collapseRL(rlInformation, txtArrowTV);
                                }
                            }
                        });

                        mLinearLayoutTV.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                if(rlInformation.getVisibility() == View.GONE){
                                    expandRL(rlInformation, txtArrowTV);
                                } else {
                                    collapseRL(rlInformation, txtArrowTV);
                                }
                            }
                        });

                        txtArrowTV.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                if(rlInformation.getVisibility() == View.GONE){
                                    expandRL(rlInformation, txtArrowTV);
                                } else {
                                    collapseRL(rlInformation, txtArrowTV);
                                }
                            }
                        });
                        break;
                }
            }

            @Override
            public int getItemCount() {
                return dataTitle.size() + 3;
            }

            @Override
            public int getItemViewType(int position) {
                switch (position) {
                    case 0:
                        return HEADER_TYPE;
                    case 1:
                        return HEADER_TYPE_2;
                    case 2:
                        return INTRO_TYPE;
                    default: return ITEM_TYPE;
                }
            }
        };
    }

    private View inflateHelper(int resId, ViewGroup parent) {
        return LayoutInflater.from(getActivity()).inflate(resId, parent, false);
    }

    // inner class for viewholder to use,
    class ViewHolder extends RecyclerView.ViewHolder {
        ViewHolder(@NonNull View itemView) {
            super(itemView);
        }
    }

    public void expandRL(final RelativeLayout rlInformation, final TextView txtArrowTV) {
        rlInformation.setVisibility(View.VISIBLE);
        txtArrowTV.setText(R.string.fa_icon_chevron_up);
    }

    public void collapseRL(final RelativeLayout rlInformation, final TextView txtArrowTV) {
        rlInformation.setVisibility(View.GONE);
        txtArrowTV.setText(R.string.fa_icon_chevron_down);
    }
}

private RecyclerView.Adapter<MyFragment.ViewHolder> createAdapter() {
    return new MyAdapter(dataTitle, dataSubtitle, dataDescription);
}

public class MyAdapter extends RecyclerView.Adapter<MyFragment.ViewHolder> {

    public static final int ITEM_TYPE = 100;
    public static final int HEADER_TYPE = 101;
    public static final int HEADER_TYPE_2 = 102;
    public static final int INTRO_TYPE = 103;

    private ArrayList<CharSequence> dataTitle;
    private ArrayList<String> dataSubtitle;
    private ArrayList<String> dataDescription;

    private Boolean expandedAll;
    private Boolean collapsedAll;

    public MyAdapter(ArrayList<CharSequence> dataTitle, ArrayList<String> dataSubtitle, ArrayList<String> dataDescription) {
        this.dataTitle = dataTitle;
        this.dataSubtitle = dataSubtitle;
        this.dataDescription = dataDescription;
    }

    @NonNull
    @Override
    public MyFragment.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int type) {
        switch (type) {
            case HEADER_TYPE:
                return new MyFragment.ViewHolder(inflateHelper(parent.getContext(), R.layout.recyclerview_header, parent));

            case HEADER_TYPE_2:
                return new MyFragment.ViewHolder(inflateHelper(parent.getContext(), R.layout.recyclerview_header, parent));

            case ITEM_TYPE:
                return new MyFragment.ViewHolder(inflateHelper(parent.getContext(), R.layout.recyclerview_item_tv_itemtype, parent));

            case INTRO_TYPE:
                return new MyFragment.ViewHolder(inflateHelper(parent.getContext(), R.layout.recyclerview_item_tv_intro, parent));

            default:
                return new TabFragmentWATTerminus.ViewHolder(inflateHelper(parent.getContext(), R.layout.recyclerview_item_tv_itemtype, parent));
        }
    }

    @Override
    public void onBindViewHolder(@NonNull MyFragment.ViewHolder viewHolder, int position) {
        final Typeface iconFont = FontManager.getTypeface(getContext(), FontManager.FONTAWESOME);
        final RelativeLayout rlInformation = viewHolder.itemView.findViewById(R.id.rl_information);

        switch (getItemViewType(position)) {
            case HEADER_TYPE:
                Button expandButton = viewHolder.itemView.findViewById(R.id.button);
                expandButton.setText(R.string.expand_all);

                expandButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        expandedAll = true;
                        collapsedAll = false;
                        notifyDataSetChanged();
                    }
                });

                break;
            case HEADER_TYPE_2:
                Button collapseButton = viewHolder.itemView.findViewById(R.id.button);
                collapseButton.setText(R.string.collapse_all);

                collapseButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        expandedAll = false;
                        collapsedAll = true;
                        notifyDataSetChanged();
                    }
                });
                break;
            case INTRO_TYPE:
                TextView tvIntroA = viewHolder.itemView.findViewById(R.id.tv_placeholder;
                tvIntroA.setVisibility(View.GONE);
                break;
            case ITEM_TYPE:
                // get the current item
                CharSequence itemA = dataTitle.get(position - 3);
                String itemB = dataSubtitle.get(position - 3);
                String itemC = dataDescription.get(position - 3);

                //
                final TextView txtTitle = viewHolder.itemView.findViewById(R.id.tv_title);
                txtTitle.setText(itemA);

                final TextView txtSubtitle = viewHolder.itemView.findViewById(R.id.tv_subtitle);
                txtSubtitle.setText(itemB);

                final TextView txtDescription = viewHolder.itemView.findViewById(R.id.tv_description);
                txtDescription.setText(itemC);

                final TextView txtArrowTV = viewHolder.itemView.findViewById(R.id.tv_expandcollapsearrow);
                txtArrowTV.setText(R.string.fa_icon_chevron_down);
                txtArrowTV.setTypeface(iconFont);

//                        final RelativeLayout rlInformation = viewHolder.itemView.findViewById(R.id.rl_information);
                rlInformation.setVisibility(View.GONE);

                //
                CardView cardView = viewHolder.itemView.findViewById(R.id.cardview_item);
                LinearLayout mLinearLayoutTV = viewHolder.itemView.findViewById(R.id.cardview_titlerow);

                //
                cardView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (rlInformation.getVisibility() == View.GONE) {
                            expandRL(rlInformation, txtArrowTV);
                        } else {
                            collapseRL(rlInformation, txtArrowTV);
                        }
                    }
                });

                mLinearLayoutTV.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (rlInformation.getVisibility() == View.GONE) {
                            expandRL(rlInformation, txtArrowTV);
                        } else {
                            collapseRL(rlInformation, txtArrowTV);
                        }
                    }
                });

                txtArrowTV.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (rlInformation.getVisibility() == View.GONE) {
                            expandRL(rlInformation, txtArrowTV);
                        } else {
                            collapseRL(rlInformation, txtArrowTV);
                        }
                    }
                });

                if (expandedAll) {
                    expandRL(rlInformation, txtArrowTV);
                } else if (collapsedAll) {
                    collapseRL(rlInformation, txtArrowTV);
                }

                break;
        }
    }

    @Override
    public int getItemCount() {
        return dataTitle.size() + 3;
    }

    @Override
    public int getItemViewType(int position) {
        switch (position) {
            case 0:
                return HEADER_TYPE;
            case 1:
                return HEADER_TYPE_2;
            case 2:
                return INTRO_TYPE;
            default:
                return ITEM_TYPE;
        }
    }

    private View inflateHelper(Context context, int resId, ViewGroup parent) {
        return LayoutInflater.from(context).inflate(resId, parent, false);
    }

}