问题：
具有不同布局的可展开RecolyerView适配器
逑彬炳
我正在尝试制作一个可扩展的RecyclerView适配器，它将为父视图和子视图提供不同的布局。我以前从来没有做过可扩展的RecyclerView适配器，所以我不知道这是否可能。下面是我的代码：
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());}
}
}
我得到了这个错误：
java.lang.IllegalArgumentException：viewType在Com.Thoughtbot.ExpandableRecyclerView.ExpandableRecyclerViewAdapter.OnCreateViewWholder（ExpandableRecyclerViewAdapter.57)在Android.Support.v7.Widget.RecyclerView$Adapter.CreateViewWholder（ExpandableRecyclerView.java:6493)在Android.Support.v7.Widget.RecyclerView在Android.support.v7.Widget.RecyclerView.OnMeasure（RecyclerView.java:3109)在Android.View.View.Measure（View.java：18930）在Android.View.View.Measure（View.java：18930）在Android.View.View.Measure（View.java：5976）在Android.Widget.LinearLayout.MeasureChildWithMargins（ViewGroup.MeasureChildBeforelayout（LinearLayout.java：）在Android.View.ViewGroup.MeasureChildWithMargins（ViewGroup.java:5976)在Android.Widget.LinearLayout.MeasureChildBeforelayout（LinearLayout.java:1486)在Android.Widget.LinearLayout.MeasureHorizonal（LinearLayout.java:1129)在Android.Widget.LinearLayout.OnMeasure（LinearLayout.java:649)在76）在Android.Widget.LinearLayout.MeasureChildbeForelayout（LinearLayout.java:1486)在Android.Widget.LinearLayout.MeasureVertical（LinearLayout.java:765)在Android.Widget.LinearLayout.OnMeasure(LinearLayout.java:647)在Android.View.View.Measure(View.java:18930)在Android.View.View.Measure(View.java:5976)在
块引号
我做错了什么？为什么我得到的viewType无效？
共有1个答案
贲文景
我尝试使用相同的ExpandableRecyclerViewAdapter，我想指出几点。
首先，关于您的错误，之所以会出现这种情况，是因为如果您查看ExpandableRecyclerViewAdapter类的OnCreateViewWholder方法，它需要的是两个值分别为2和1的ExpandableListPosition.Group或ExpandableListPosition.Child中的任何一个。
现在，您犯的第一个错误是将getItemViewType用viewtype值复盖为0和1，其中1已经在library中使用，因此它会按照library类向您抛出非法异常，这是正确的。
为了获得多个子视图,
首先，使用MultiTypeExpandableRecyclerViewAdapter扩展适配器类，并创建两个扩展ChildViewWholder的类，然后，如果您看到类扩展声明，它将如下所示：
public class ScoreCardDataAdapter extends MultiTypeExpandableRecyclerViewAdapter<TeamScoreCardViewHolder, ChildViewHolder> {
此外，我为viewtype使用了2个变量，分别为值3和4的TYPE_HEADER和TYPE_ITEM。您可以使用任何东西，但要确保它大于2。
然后重写以下方法：
@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，表示第一个位置是头，并返回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OnCreateChildViewWholder中,
您可以检查视图类型并返回预期的ViewWholder。
并通过调用以下方法绑定viewholder：
@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.
}
请看下面我完整的适配器类实现，供您参考。
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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