具有不同布局的可扩展Recyclerview适配器

问题描述 投票：0回答：1

我正在尝试制作一个expandable RecyclerView adapter，它将为父视图和子视图提供不同的布局。我之前从未做过expanable RecyclerView adapter，所以我不知道这是否可行。这是我的代码：

public class GroupsAdapter extends ExpandableRecyclerViewAdapter<GroupsAdapter.ParentVehicleViewHolder, GroupsAdapter.ChildItemViewHolder> {

    //region final Fields
    private final GroupsClickListener mOnItemClickListener;
    private final Repository mRepository;
    private boolean mIsClicked;
    private int mFilterField;
    private int mFilterType;
    private int viewType;
    //endregion

    //region Fields
    private List<ParentVehicle> mGroups = new ArrayList<>();
    //endregion

    //region Constructors
    public GroupsAdapter(List<ParentVehicle> groups, Repository repository,
                         GroupsClickListener listener, boolean isClicked, int Layout) {
        super(groups);
        this.mOnItemClickListener = listener;
        this.mRepository = repository;
        this.mGroups = groups;
        this.mIsClicked = isClicked;
        this.viewType = Layout;
    }
    //endregion


    @Override
    public int getItemViewType(int position) {
        if (position == 0){
            viewType = 0;
        }else {
            viewType=1;
        }
        return viewType;
    }

    public int getViewTypeCount() {
        return 2;
    }


    public void setData(List<ParentVehicle> groups, boolean isClicked) {
        mGroups.clear();
        mGroups.addAll(groups);
        mIsClicked = isClicked;
        notifyDataSetChanged();
    }

    public void setGroup(ParentVehicle group) {
        mGroups.clear();
        mGroups.add(group);
        notifyDataSetChanged();
    }

    public void sortByName() {
        if (mFilterField == Constants.FIELD_NAME) {
            if (mFilterType == Constants.DECREASING) {
                mFilterType = Constants.INCREASING;
                Collections.sort(mGroups, new ParentVehicle.NameComparator());
                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.NameComparator());
                }
            } else {
                mFilterType = Constants.DECREASING;
                Collections.sort(mGroups, Collections.reverseOrder(new ParentVehicle.NameComparator()));
                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), Collections.reverseOrder(new Vehicle.NameComparator()));
                }
            }
        } else {
            mFilterType = Constants.INCREASING;
            mFilterField = Constants.FIELD_NAME;
            Collections.sort(mGroups, new ParentVehicle.NameComparator());
            if (mIsClicked) {
                Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.NameComparator());
            }
        }
        notifyDataSetChanged();
    }

    public void sortByNumber() {
        if (mFilterField == Constants.FIELD_ID) {
            if (mFilterType == Constants.DECREASING) {
                mFilterType = Constants.INCREASING;
                Collections.sort(mGroups, new ParentVehicle.IdComparator());
                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.IdComparator());
                }
            } else {
                mFilterType = Constants.DECREASING;
                Collections.sort(mGroups, Collections.reverseOrder(new ParentVehicle.IdComparator()));
                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), Collections.reverseOrder(new Vehicle.IdComparator()));
                }
            }
        } else {
            mFilterType = Constants.INCREASING;
            mFilterField = Constants.FIELD_ID;
            Collections.sort(mGroups, new ParentVehicle.IdComparator());
            if (mIsClicked) {
                Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.IdComparator());
            }
        }
        notifyDataSetChanged();
    }


    public void sortByDays() {
        if (mFilterField == Constants.FIELD_DAYS) {
            if (mFilterType == Constants.DECREASING) {
                mFilterType = Constants.INCREASING;
                Collections.sort(mGroups, new ParentVehicle.DaysComparator());
                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.DaysComparator());
                }
            } else {
                mFilterType = Constants.DECREASING;
                Collections.sort(mGroups, Collections.reverseOrder(new ParentVehicle.DaysComparator()));
                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), Collections.reverseOrder(new Vehicle.DaysComparator()));
                }
            }
        } else {
            mFilterType = Constants.INCREASING;
            mFilterField = Constants.FIELD_DAYS;
            Collections.sort(mGroups, new ParentVehicle.DaysComparator());
            if (mIsClicked) {
                Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.DaysComparator());
            }
        }
        notifyDataSetChanged();
    }

    public void sortByGeo() {
        if (mFilterField == Constants.FIELD_GEO) {
            if (mFilterType == Constants.DECREASING) {
                mFilterType = Constants.INCREASING;
                Collections.sort(mGroups, new ParentVehicle.GeoComparator());
                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.GeoComparator());
                }
            } else {
                mFilterType = Constants.DECREASING;
                Collections.sort(mGroups, Collections.reverseOrder(new ParentVehicle.GeoComparator()));
                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), Collections.reverseOrder(new Vehicle.GeoComparator()));
                }
            }
        } else {
            mFilterType = Constants.INCREASING;
            mFilterField = Constants.FIELD_GEO;
            Collections.sort(mGroups, new ParentVehicle.GeoComparator());
            if (mIsClicked) {
                Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.GeoComparator());
            }
        }
        notifyDataSetChanged();
    }

    public void sortByWarning() {
        if (mFilterField == Constants.FIELD_WARNING) {
            if (mFilterType == Constants.DECREASING) {
                mFilterType = Constants.INCREASING;
                Collections.sort(mGroups, new ParentVehicle.WarningComparator());
                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.WarningComparator());
                }
            } else {
                mFilterType = Constants.DECREASING;
                Collections.sort(mGroups, Collections.reverseOrder(new ParentVehicle.WarningComparator()));

                if (mIsClicked) {
                    Collections.sort(mGroups.get(0).getVehicles(), Collections.reverseOrder(new Vehicle.WarningComparator()));
                }
            }
        } else {
            mFilterType = Constants.INCREASING;
            mFilterField = Constants.FIELD_WARNING;
            Collections.sort(mGroups, new ParentVehicle.WarningComparator());

            if (mIsClicked) {
                Collections.sort(mGroups.get(0).getVehicles(), new Vehicle.WarningComparator());
            }
        }
        notifyDataSetChanged();
    }


    void filter(String text) {
        List<Group> temp = new ArrayList();
        for (Group group : getAllGroups()) {
            if (group.getName().toLowerCase().contains(text)) {
                temp.add(group);
            }
        }
        if (TextUtils.isEmpty(text)) {
            temp = getAllGroups();
        }
        //update recyclerview
        //setData(temp);
    }

    private List<Group> getAllGroups() {
        final List<Group> tempGroupList = new ArrayList<>();
        if (!mRepository.getCompanies().isEmpty()) {
            for (Company company : mRepository.getCompanies()) {
                tempGroupList.addAll(Arrays.asList(company.getGroups()));
            }
        }
        return tempGroupList;
    }

    //region expandableAdapterMethods
    @Override
    public ParentVehicleViewHolder onCreateGroupViewHolder(ViewGroup parent, int viewType) {
         View view;
       if (viewType==0){
              view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_table, parent, false);
            return new ParentVehicleViewHolder(view,viewType);
        } else if (viewType==1) {
           view = LayoutInflater.from(parent.getContext()).inflate(R.layout.delete_row, parent, false);
           return new ParentVehicleViewHolder(view,viewType);
       } return null;
    }

    @Override
    public ChildItemViewHolder onCreateChildViewHolder(ViewGroup child, int viewType) {
        View view;
        if (viewType == 0) {
            view = LayoutInflater.from(child.getContext()).inflate(R.layout.item_table, child, false);
            return new ChildItemViewHolder(view, viewType);
        } else if (viewType == 1) {
            view = LayoutInflater.from(child.getContext()).inflate(R.layout.delete_row, child, false);
            return new ChildItemViewHolder(view, viewType);
        }return null;
    }

    @Override
    public void onBindChildViewHolder(ChildItemViewHolder holder, int position, ExpandableGroup group, int childIndex) {
       int viewType = getItemViewType(position);
        if (viewType==0){
            final Vehicle vehicle = ((ParentVehicle) group).getItems().get(childIndex);
            holder.bind(vehicle, mOnItemClickListener);
        } else if (viewType==1){
            final Vehicle vehicle = ((ParentVehicle) group).getItems().get(childIndex);
            holder.bind2(vehicle, mOnItemClickListener);
        }
    }

    @Override
    public void onBindGroupViewHolder(ParentVehicleViewHolder holder, int position, ExpandableGroup group) {
       int viewType = getItemViewType(position);
        if (viewType==0){
            holder.bind(((ParentVehicle) group), mOnItemClickListener, mIsClicked);
        } else if (viewType==1){
            holder.bind2(((ParentVehicle) group), mIsClicked);
        }

    }
    //endregion

    static class ParentVehicleViewHolder extends GroupViewHolder {
        TextView novText;
        ImageView strelka;
        TextView day7;
        TextView day6;
        TextView day5;
        TextView day4;
        TextView day3;
        TextView day2;
        TextView day1;
        TextView mId;
        TextView mNumber;
        ImageView mBattery;
        ImageView mGsimbol;
        ImageView mWarning;
        ImageView mGroupArrow;
        private View mView;

        public ParentVehicleViewHolder(View itemView, int viewType) {
            super(itemView);
            this.mView = itemView;
            ButterKnife.bind(this, itemView);
            if (viewType == 0) {
                day7 = itemView.findViewById(R.id.number_7);
                day6 = itemView.findViewById(R.id.number_6);
                day5=itemView.findViewById(R.id.number_5);
                day4=itemView.findViewById(R.id.number_4);
                day3=itemView.findViewById(R.id.number_3);
                day2=itemView.findViewById(R.id.number_2);
                day1=itemView.findViewById(R.id.number_1);
                mId=itemView.findViewById(R.id.item_unit_id);
                mNumber=itemView.findViewById(R.id.item_number);
                mBattery=itemView.findViewById(R.id.item_battery);
                mGsimbol=itemView.findViewById(R.id.item_gsimbol);
                mWarning=itemView.findViewById(R.id.icon_warning);
                mGroupArrow=itemView.findViewById(R.id.group_arrow);


            } else if (viewType==1){
                novText=itemView.findViewById(R.id.item_numberEden);
                strelka=itemView.findViewById(R.id.group_arrowEden);
            }
        }

        public void bind(ParentVehicle parentVehicle, GroupsClickListener groupsClickListener, boolean showArrow) {
            mNumber.setText(parentVehicle.getId());
            mId.setText(parentVehicle.getName());
            mId.setTextColor(mView.getContext().getResources().getColor(R.color.light_blue));

            mView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (parentVehicle.isCompany()) {
                        groupsClickListener.onCompanyItemClick(parentVehicle.getId());
                    } else {
                        groupsClickListener.onGroupItemClick(parentVehicle.getId());
                    }
                }
            });

            mGroupArrow.setVisibility(showArrow ? View.VISIBLE : View.GONE);

            if (parentVehicle.getVehicles() != null && !parentVehicle.getVehicles().isEmpty()) {
                if (isGeo(parentVehicle.getVehicles())) {
                    mGsimbol.setVisibility(View.INVISIBLE);
                } else {
                    mGsimbol.setVisibility(View.VISIBLE);
                }

                if (isWarning(parentVehicle.getVehicles())) {
                    mWarning.setVisibility(View.VISIBLE);
                } else {
                    mWarning.setVisibility(View.INVISIBLE);
                }
            }
            day1.setBackgroundResource(isActiveDay(parentVehicle.getVehicles(), 0) ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day2.setBackgroundResource(isActiveDay(parentVehicle.getVehicles(), 1) ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day3.setBackgroundResource(isActiveDay(parentVehicle.getVehicles(), 2) ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day4.setBackgroundResource(isActiveDay(parentVehicle.getVehicles(), 3) ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day5.setBackgroundResource(isActiveDay(parentVehicle.getVehicles(), 4) ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day6.setBackgroundResource(isActiveDay(parentVehicle.getVehicles(), 5) ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day7.setBackgroundResource(isActiveDay(parentVehicle.getVehicles(), 6) ? R.drawable.green_rectangle : R.drawable.red_rectangle);
        }

        private boolean isGeo(List<Vehicle> vehicles) {
            if (vehicles == null || vehicles.isEmpty()) {
                return true;
            }
            for (Vehicle vehicle : vehicles) {
                if (!vehicle.hasGeofenceAlarm()) {
                    return false;
                }
            }
            return true;
        }

        private boolean isWarning(List<Vehicle> vehicles) {
            if (vehicles == null || vehicles.isEmpty()) {
                return false;
            }
            for (Vehicle vehicle : vehicles) {
                if (vehicle.isWarning()) {
                    return true;
                }
            }
            return false;
        }

        private boolean isActiveDay(List<Vehicle> vehicles, int day) {
            if (vehicles == null || vehicles.isEmpty()) {
                return true;
            }
            for (Vehicle vehicle : vehicles) {
                if (vehicle.getDays() == null || vehicle.getDays().length == 0 || !vehicle.getDays()[day]) {
                    return false;
                }
            }
            return true;
        }

        public void bind2(ParentVehicle parentVehicle,  boolean showArrow) {
            novText.setText(parentVehicle.getName());
            strelka.setVisibility(showArrow ? View.VISIBLE : View.GONE);
        }
    }


    static class ChildItemViewHolder extends ChildViewHolder {

        TextView novText2;
        TextView day7;
        TextView day6;
        TextView day5;
        TextView day4;
        TextView day3;
        TextView day2;
        TextView day1;
        TextView mId;
        ImageView mBattery;
        ImageView mGsimbol;
        ImageView mWarning;
        private View mView;

        public ChildItemViewHolder(View itemView, int viewType) {
            super(itemView);
            this.mView = itemView;
            ButterKnife.bind(this, itemView);
            if (viewType==0){
                day7 = itemView.findViewById(R.id.number_7);
                day6 = itemView.findViewById(R.id.number_6);
                day5=itemView.findViewById(R.id.number_5);
                day4=itemView.findViewById(R.id.number_4);
                day3=itemView.findViewById(R.id.number_3);
                day2=itemView.findViewById(R.id.number_2);
                day1=itemView.findViewById(R.id.number_1);
                mId=itemView.findViewById(R.id.item_unit_id);
               mBattery=itemView.findViewById(R.id.item_battery);
                mGsimbol=itemView.findViewById(R.id.item_gsimbol);
                mWarning=itemView.findViewById(R.id.icon_warning);
            } else if (viewType==1){
                novText2=itemView.findViewById(R.id.item_numberEden);
            }



        }

        public void bind(Vehicle vehicle, GroupsClickListener onItemClickListener) {
            mId.setText(vehicle.getName());

            if (vehicle.hasGeofenceAlarm()) {
                mGsimbol.setVisibility(View.INVISIBLE);
            } else {
                mGsimbol.setVisibility(View.VISIBLE);
            }

            if (vehicle.isWarning()) {
                mWarning.setVisibility(View.VISIBLE);
            } else {
                mWarning.setVisibility(View.INVISIBLE);
            }

            mView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    onItemClickListener.onGroupChildItemClick(vehicle.getId());
                }
            });

            day1.setBackgroundResource(vehicle.getDays()[0] ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day2.setBackgroundResource(vehicle.getDays()[1] ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day3.setBackgroundResource(vehicle.getDays()[2] ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day4.setBackgroundResource(vehicle.getDays()[3] ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day5.setBackgroundResource(vehicle.getDays()[4] ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day6.setBackgroundResource(vehicle.getDays()[5] ? R.drawable.green_rectangle : R.drawable.red_rectangle);
            day7.setBackgroundResource(vehicle.getDays()[6] ? R.drawable.green_rectangle : R.drawable.red_rectangle);
        }
        public void bind2(Vehicle vehicle, GroupsClickListener onItemClickListener) {
            novText2.setText(vehicle.getName());}
    }
}

我收到此错误：

java.lang.IllegalArgumentException：viewType在com.thoughtbot.expandablerecyclerview.ExpandableRecyclerViewAdapter.onCreateViewHolder（ExpandableRecyclerViewAdapter.java:57）的android.support.v7.widget.RecyclerView $ Adapter.createViewHolder（RecyclerView.java:6493）在android下无效.support.v7.widget.RecyclerView $ Recycler.tryGetViewHolderForPositionByDeadline（RecyclerView.java:5680）在android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:5563）android.support.v7.widget.RecyclerView位于android.support.v7.widget.LinearLayoutManager.layoutChunk的android.support.v7.widget.LinearLayoutManager $ LayoutState.next（LinearLayoutManager.java:2229）$ Recycler.getViewForPosition（RecyclerView.java:5559）（LinearLayoutManager.java:1556 ）在android.support.v7.widget.LilloutManager.fill（LinearLayoutManager.java:1516）的android.support.v7.widget.LinearLayoutManager.onLayoutChildren（LinearLayoutManager.java:608）android.support.v7.widget.RecyclerView上的android.support.v7.widget.LinearLayoutManager.fill（LinearLayoutManager.java:1516）。 dispatchL ayoutStep2（RecyclerView.java:3693）位于android.view.measure.View.measure.view.IndMargins的android.view.View.measure（View.java:18930）上的android.support.v7.widget.RecyclerView.onMeasure（RecyclerView.java:3109） （ViewGroup.java:5976）android.widget.Lineout.Yalout.anMeasure（LinearLayout.java：android.widget.Lineout.measure中的android.widget.LinearLayout.measureChildBayfore.Yalout.measureVerical（LinearLayout.java：765） 647）在Android.widget.Lineout.measureHorizo​​ntal（LinearLayout.java:1109）上的android.view.measure.measure（（View.java:18930）在Android上的android.widget.LinearLayout.onMeasure（LinearLayout.java:649）。在Android.widget.Linear.measureVertical的android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1486）的android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5976）上查看View.View.measure（View.java:18930） （LinearLayout.java:765）在android.view.View.measure的android.widget.LinearLayout.onMeasure（LinearLayout.java:647）上（View.java:18930） ）在Android.widget.Linout.measure上的android.widget.Line中的android.widget.Lineout.measureChildBayfore.Layout（LinearLayout.java：1486）上的android.view.ViewGroup.measureChildMithgins（ViewGroup.java:5976） .LinearLayout.onMeasure（LinearLayout.java:649）位于android.view.measure.View.measure（View.java:18930）的android.view.visionGroup.measureChildWithMargins（ViewGroup.java:5976）android.widget.LinearLayout.measureChildBeforeLayout（ LinearLayout.java:1486）在android.view.View.measure的android.widget.Linear.measureVertical（LinearLayout.java：765）android.widget.Linear.onMeasure（LinearLayout.java:647）（View.java:18930） ）在android.view.visionGroup.measureChildMaygins（ViewGroup.java:5976）android.widget.FrameLayout.onMeasure（FrameLayout.java:194）android.support.v7.widget.ContentFrameLayout.onMeasure（ContentFrameLayout.java:139）在android.view.measure.vision.measure.View.measure（View.java:18930）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:59 76）在android.widget.Lineout.measureChildBayforeLayout.measureChir前面的Android.widget.Lineout.measureChild前线（LinearLayout.java：786）的android.widget.Line中的线性范围。线性范围内的android.widget.Linear.onMeasure（LinearLayout.java:647）。 view.View.measure（View.java:18930）位于android.view.View.vision.measure的android.w.Fidget上的android.w.移动设备上的android.view.measureGroup.measureChildMaygins（ViewGroup.java:5976） （View.java:18930）在Android.widget.Linout.measureVertical的android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1486）上的android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5976）（LinearLayout.java： 765）在Android.view.measure（View.java:18930）上的android.view.measure.View.measure（View.java:18930）上的android.widget.LinealLayout.onMeasure（LinearLayout.java:647）安卓android.view.measure.measureChildWithMargins（ViewGroup.java:5976）。 com.android.internal.poli中的widget.FrameLayout.onMeasure（FrameLayout.java:194）

大段引用

我究竟做错了什么？为什么我得到viewType无效？

android recycler-adapter recyclerview-layout
1个回答
0
投票

我尝试使用相同的ExpandableRecyclerViewAdapter，我想指出一些事情。

首先，关于你的错误，你得到这个，因为如果你看一下ExpandableRecyclerViewAdapter类的onCreateViewHolder方法，它期望两个中的任何一个 - ExpandableListPosition.GROUP或ExpandableListPosition.CHILD分别为值2和1。

现在你犯的第一个错误就是你将getItemViewType重写为viewtype值为0和1，其中1已经在库中使用，因此它会根据库类引发非法异常，这是正确的。

现在，为了获得多个子视图，就像我的情况一样，

首先使用MultiTypeExpandableRecyclerViewAdapter扩展您的适配器类，并创建扩展ChildViewHolder的2个clases，然后如果您看到类扩展声明，它现在将如下所示：

public class ScoreCardDataAdapter extends MultiTypeExpandableRecyclerViewAdapter<TeamScoreCardViewHolder, ChildViewHolder> {

另外，我将viewtype的2个变量用作TYPE_HEADER，将TYPE_ITEM用作值3和4.你可以使用任何东西，但要确保它大于2。

然后覆盖以下方法：

  @Override
  public boolean isChild(int viewType) {
    return viewType == TYPE_HEADER || viewType == TYPE_ITEM;
  }

在这个方法中，我实现了一个方法，说第一个位置是标题，并为该情况返回TYPE_HEADER。

 @Override
        public int getChildViewType(int position, ExpandableGroup group, int childIndex) {
            if(isPositionHeader(childIndex))
                return TYPE_HEADER;
            else
                return TYPE_ITEM;
        }

private boolean isPositionHeader(int position) {
    return position == 0;
}

然后在你的onCreateChildViewHolder中，

您可以检查视图类型并返回预期的VIEWHOLDER。

并通过调用以下方法绑定视图者：

  @Override
  public void onBindChildViewHolder(ChildViewHolder holder, int flatPosition, ExpandableGroup group,
      int childIndex) {
    int viewType = getItemViewType(flatPosition);
//here based on the view type pass the appropriate data.
}

请参阅下面的完整适配器类实现，以供参考。

public class ScoreCardDataAdapter extends MultiTypeExpandableRecyclerViewAdapter<TeamScoreCardViewHolder, ChildViewHolder> {

private static final int TYPE_HEADER = 3;
private static final int TYPE_ITEM = 4;

public ScoreCardDataAdapter(Fragment fragment, List<? extends ExpandableGroup> groups) {
    super(groups);
}

@Override
public TeamScoreCardViewHolder onCreateGroupViewHolder(ViewGroup parent, int viewType) {
    final View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.team_score_card_parent_view_holder, parent, false);
    return new TeamScoreCardViewHolder(view);
}

@Override
public ChildViewHolder onCreateChildViewHolder(ViewGroup parent, final int viewType) {
    if(viewType == TYPE_ITEM) {
        final View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.team_score_card_data_child_view_holder, parent, false);
        return new ScoreCardDataViewHolder(view, TYPE_ITEM);
    } else if(viewType == TYPE_HEADER) {
        final View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.header_item, parent, false);
        return new ScoreCardHeaderViewHolder(view, TYPE_HEADER);
    }
    throw new RuntimeException("there is no type that matches the type " + viewType + " + make sure your using types correctly");
}

@Override
public void onBindChildViewHolder(ChildViewHolder holder, int flatPosition, ExpandableGroup group, int childIndex) {
    int viewType = getItemViewType(flatPosition);
    if(viewType == TYPE_HEADER) {
        //Currently I am passing string and binding it to ScoreCardHeaderViewHolder
        // but we can pass any data.
        ((ScoreCardHeaderViewHolder) holder).onBind("batsman");
    } else if(viewType == TYPE_ITEM) {
        //here I am getting my data from api passed to adapter and binding it to the ScoreCardDataViewHolder
        final BattingData battingData = ((BattingDataExpandable) group).getItems().get(childIndex);
        ((ScoreCardDataViewHolder) holder).onBind(battingData, group, childIndex);
    }
}

@Override
public void onBindGroupViewHolder(TeamScoreCardViewHolder holder, int flatPosition, ExpandableGroup group) {
    holder.setTeamName(group);
}

@Override
public boolean isChild(int viewType) {
    return viewType == TYPE_HEADER || viewType == TYPE_ITEM;
}

@Override
public int getChildViewType(int position, ExpandableGroup group, int childIndex) {
    if(isPositionHeader(position))
        return TYPE_HEADER;
    else
        return TYPE_ITEM;
}

private boolean isPositionHeader(int position) {
    return position == 0;
}
}
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