Develop Reference

NestedRecyclerView Problem - Last item of the second RecyclerView is duplicated into the first one after the keyboard appears

I'm desperate.
I have a nested recycler view. Each outer element has an array of inner elements. A different adapter has been created for the inner elements. I am creating an array of external elements of class "KairosWithEvents", each of which contains internal elements of class "Event". Everything is displayed well. When elements are added, everything is also updated. For testing, I created two objects of the "KairosWithEvent" class. In the first object I have placed two objects of the "Event" class, and in the second - three objects. But when I want to change the EditText value, the keyboard appears. And the last element of the second object appears in the first object. How can I fix it? Objects are not moved or duplicated, but showed incorrectly.
This is what a nestled recycler view looks like initially.
And this is what a nested recycler view looks like after the keyboard appears. The "Эвент5" element is duplicated to the first element for some reason.
Here's my code: Outer Adapter:
public class EventAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static List<Item> items;
private static RecyclerViewClickInterface listener;
private RecyclerView.RecycledViewPool sharedPool = new RecyclerView.RecycledViewPool();
private Context context;
public EventAdapter() {
items = new ArrayList<>();
this.context = context;
}
public EventAdapter(List<Item> newItems){
items = newItems;
}
class KairosViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener {
private TextView title;
private CheckBox iv;
private RecyclerView rv;
public KairosViewHolder(#NonNull View itemView) {
super(itemView);
title = itemView.findViewById(R.id.tv);
iv = itemView.findViewById(R.id.iv);
rv = itemView.findViewById(R.id.rvSteaks);
itemView.setBackgroundColor(Color.parseColor("#91b3f2"));
itemView.setOnClickListener(this);
itemView.setOnLongClickListener(this);
}
#RequiresApi(api = Build.VERSION_CODES.N)
void bind(KairosWithEvents kairosWithEvents){
title.setText(kairosWithEvents.kairos.kairosId + " = " + kairosWithEvents.kairos.title);
LinearLayoutManager layoutManager = new LinearLayoutManager(
rv.getContext(),
LinearLayoutManager.VERTICAL,
false);
List<Item> itemsEvents = new ArrayList<>();
kairosWithEvents.events.forEach(i -> itemsEvents.add(new Item(Constants.EVENT_KAIROS, i)));
SubAdapter childAdapter = new SubAdapter(itemsEvents);
rv.setLayoutManager(layoutManager);
rv.setAdapter(childAdapter);
rv.setRecycledViewPool(sharedPool);
}
#Override
public void onClick(View view) {
int position = getAdapterPosition();
if (listener != null && position != RecyclerView.NO_POSITION){
listener.onItemKairosWithEvents( ((KairosWithEvents) items.get(position).object) );
}
}
#Override
public boolean onLongClick(View view) {
return false;
}
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
switch (viewType){
case Constants.KAIROS:
return new KairosViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_item_ex, parent, false));
}
return null;
}
#RequiresApi(api = Build.VERSION_CODES.N)
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
switch (getItemViewType(position)){
case Constants.KAIROS:
KairosWithEvents kairos = ((KairosWithEvents) items.get(position).object);
((KairosViewHolder) holder).bind(kairos);
break;
}
}
#Override
public int getItemCount() {
return items.size();
}
#Override
public int getItemViewType(int position) {
return items.get(position).type;
}
}
Inner Adapter:
public class SubAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
private static List<Item> items;
public SubAdapter(List<Item> newItems) {
items = newItems;
}
static class EventViewHolder extends RecyclerView.ViewHolder {
private TextView title;
public EventViewHolder(#NonNull View itemView) {
super(itemView);
title = itemView.findViewById(R.id.tv);
itemView.setBackgroundColor(Color.parseColor("#ffc8a8"));
}
void bind(Event event){
title.setText(event.eventId + " = " + event.title);
}
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
switch (viewType) {
case Constants.EVENT_KAIROS:
return new EventViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_item_sub, parent, false));
}
return null;
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
switch (getItemViewType(position)){
case Constants.EVENT_KAIROS:
Event event = (Event) items.get(position).object;
((EventViewHolder) holder).bind(event);
break;
}
}
#Override
public int getItemCount() {
return items.size();
}
#Override
public int getItemViewType(int position) {
return items.get(position).type;
}
}

In SubAdapter, remove the static keyword from your items field:
private static List<Item> items;
Should be this instead:
private List<Item> items;
You should make the same change to your outer adapter, but since there's only one of them at a time it doesn't wind up causing issues.

RecyclerView lag on first scroll: Is onCreateViewHolder supposed to be called for every item?

onCreateViewHolder is called every time an item in my list is first displayed and that causes lag the first time the user scrolls.
Is that how it should be? I thought onCreateViewHolder would be called only once per viewType.
Here is my adapter:
public class CompetitionTableAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final CompetitionAdapterOnItemClickHandler mClickHandler;
private List<CompetitionTableItem> mTable;
int calls = 0; //Used to see how many times onCreateViewHolder is called
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
calls++;
if(viewType == CompetitionTableItem.TYPE_HEADER){
View view = LayoutInflater.from(mContext).inflate(R.layout.table_header, viewGroup, false);
Log.i("CompetitionTableAdapter", "onCreateViewHolder "+calls);
return new CompetitionAdapterHeaderViewHolder(view);
}else{
View view = LayoutInflater.from(mContext).inflate(R.layout.table_item, viewGroup, false);
view.setFocusable(true);
Log.i("CompetitionTableAdapter", "onCreateViewHolder "+calls);
return new CompetitionAdapterViewHolder(view);
}
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
int type = getItemViewType(position);
if (type == CompetitionTableItem.TYPE_HEADER) {
HeaderItem header = (HeaderItem) mTable.get(position);
CompetitionAdapterHeaderViewHolder holder = (CompetitionAdapterHeaderViewHolder) viewHolder;
holder.headerTextView.setText(header.getTitle());
} else {
CompetitionAdapterViewHolder holder = (CompetitionAdapterViewHolder) viewHolder;
TeamItem currentTeamTableEntity = (TeamItem)mTable.get(position);
TableEntryEntity tableEntry = currentTeamTableEntity.getTableEntryEntity();
holder.teamNameTextView.setText(tableEntry.getTeam().getName());
holder.pointsTextView.setText(String.valueOf(tableEntry.getPoints()));
holder.positionTextView.setText(String.valueOf(tableEntry.getPosition()));
holder.playedTextView.setText(String.valueOf(tableEntry.getPlayedGames()));
holder.lostTextView.setText(String.valueOf(tableEntry.getLost()));
holder.drawnTextView.setText(String.valueOf(tableEntry.getDraw()));
holder.wonTextView.setText(String.valueOf(tableEntry.getWon()));
String crestUrl = NetworkUtils.getCrestUrl(tableEntry.getTeam().getId(),NetworkUtils.IMAGE_QUALITY_SD);
Picasso.get().load(crestUrl).placeholder(R.drawable.default_crest).error(R.drawable.default_crest).into(holder.crestView);
}
}
#Override
public long getItemId(int position) {
int type = getItemViewType(position);
if (type == CompetitionTableItem.TYPE_HEADER) {
return NO_ID;
}else{
return ((TeamItem)mTable.get(position)).getTableEntryEntity().getTeam().getId();
}
}
public void swapTable(final List<CompetitionTableItem> table) {
mTable = table;
notifyDataSetChanged();
}
#Override
public int getItemViewType(int position) {
return mTable.get(position).getType();
}
public interface CompetitionAdapterOnItemClickHandler {
void onItemClick(TableEntryEntity competition);
}
class CompetitionAdapterViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
final ImageView crestView;
final TextView teamNameTextView;
final TextView positionTextView;
final TextView pointsTextView;
final TextView playedTextView;
final TextView wonTextView;
final TextView drawnTextView;
final TextView lostTextView;
CompetitionAdapterViewHolder(View view) {
super(view);
crestView = view.findViewById(R.id.team_crest);
teamNameTextView = view.findViewById(R.id.team_name);
pointsTextView = view.findViewById(R.id.team_points);
positionTextView = view.findViewById(R.id.team_position);
playedTextView = view.findViewById(R.id.matches_played);
wonTextView = view.findViewById(R.id.matches_won);
drawnTextView = view.findViewById(R.id.matches_drawn);
lostTextView = view.findViewById(R.id.matches_lost);
view.setOnClickListener(this);
}
#Override
public void onClick(View v) {
int adapterPosition = getAdapterPosition();
TableEntryEntity tableEntryEntity = ((TeamItem)mTable.get(adapterPosition)).getTableEntryEntity();
mClickHandler.onItemClick(tableEntryEntity);
}
}
class CompetitionAdapterHeaderViewHolder extends RecyclerView.ViewHolder {
final TextView headerTextView;
CompetitionAdapterHeaderViewHolder(View view) {
super(view);
headerTextView = view.findViewById(R.id.headerText);
}
}
}
https://github.com/s6joui/football-data-android-java/blob/master/app/src/main/java/tech/joeyck/livefootball/ui/competition_detail/standings/adapter/CompetitionTableAdapter.java
And fragment where RecyclerView is: https://github.com/s6joui/football-data-android-java/blob/master/app/src/main/java/tech/joeyck/livefootball/ui/BaseListFragment.java
Full source code: https://github.com/s6joui/football-data-android-java
I'm using androidx recyclerview version 1.1.0-alpha01

GridLayout and LinearLayout both in one RecyclerView

any idea how to use Two different LayoutManager in one View? I have four cards in grid on top of the screen and bottom, and I want LinearLayout but RecyclerView showing one View at a time
RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(this, 2);
recyclerView.setLayoutManager(mLayoutManager);
RecyclerView.LayoutManager lmLayoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(lmLayoutManager);
recyclerView.addItemDecoration(new GridSpacingDashboard(2, dpToPx(2), true));
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(adapter);
Is there any way I can use both Views in a single RecyclerView Or on Index O I have GridLayout and on 1 showing LinearLayout , How can achieve if there is any possibilities
Update (Card Adapter)
public class CardAdapter extends RecyclerView.Adapter<adapter.CardAdapter.CardViewHolder> {
public static final int topGridCard = 0;
public static final int bottomCards=1;
private Context mContext;
private List<CardModel> cardList;
public CardAdapter(Context mContext, List<CardModel> cardList) {
this.mContext = mContext;
this.cardList = cardList;
}
#Override
public.adapter.CardAdapter.CardViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v;
if (viewType == topGridCard) {
v = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view_sec, parent, false);
return new adapter.CardAdapter.TopGridCardView(v);
}
else if (viewType == bottomCards) {
v = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view, parent, false);
return new adapter.CardAdapter.BottomCardView(v);
}
return null;
}
#Override
public void onBindViewHolder(final adapter.CardAdapter.CardViewHolder holder, final int position) {
CardModel cardModel = cardList.get(position);
if (holder.getItemViewType()==topGridCard){ adapter.CardAdapter.TopGridCardView vholder = (adapter.CardAdapter.TopGridCardView) holder;
vholder.secTitleStats.setText(cardModel.getNumStats());
vholder.secNumStats.setText(cardModel.getCardTitles());
vholder.secCardStats.setText(cardModel.getSecCartNumStats());
Glide.with(mContext).load(cardModel.getThumbnail()).into(vholder.secthumbnail);
}
else if(holder.getItemViewType()==bottomCards){
adapter.CardAdapter.BottomCardView vholder = (adapter.CardAdapter.BottomCardView) holder;
vholder.numStats.setText(cardModel.getNumStats());
vholder.image_title.setText(cardModel.getCardTitles());
Glide.with(mContext).load(cardModel.getThumbnail()).into(vholder.thumbnail);
}
}
#Override
public int getItemCount(){
return cardList.size();
}
public static class CardViewHolder extends RecyclerView.ViewHolder {
public CardViewHolder(View v) {
super(v);
}
}
public class TopGridCardView extends adapter.CardAdapter.CardViewHolder {
public TextView secTitleStats, secNumStats,secCardStats;
public ImageView secthumbnail;
public TopGridCardView(View view){
super(view);
secTitleStats = (TextView) view.findViewById(R.id.secTitleNumStats);
secNumStats = (TextView) view.findViewById(R.id.secCardNumStats);
secCardStats = (TextView) view.findViewById(R.id.sectitle);
secthumbnail = (ImageView) view.findViewById(R.id.seCthumbnail);
}
}
public class BottomCardView extends adapter.CardAdapter.CardViewHolder {
public TextView numStats,image_title;
public ImageView thumbnail;
public BottomCardView(View view) {
super(view);
numStats=(TextView)view.findViewById(R.id.numStatics);
image_title=(TextView) view.findViewById(R.id.title_overlay);
thumbnail = (ImageView) view.findViewById(R.id.thumbnail);
}
}
#Override
public int getItemViewType(int position) {
if (isPositionHeader(position))
return topGridCard;
return bottomCards;
}
private boolean isPositionHeader(int position) {
return position == 0;
}
}
I have attached my Adapter just for more understanding , what the desired result should be
|Grid Card 1 | Grid Card 2 |
|Grid Card 3 | Grid Card 4 |
| LinearLayout Card 1 |
| LinearLayout Card 2 |
any possibilities

you can simply use gridLayout with different viewType to achieve this.
mLayoutManager = new GridLayoutManager(getActivity(), 2);
mLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
#Override
public int getSpanSize(int position) {
switch (adapter.getItemViewType(position)) {
case MenuAdapter.ITEM:
return 1;
case MenuAdapter.FULLSIZE:
return 2;
default:
return 1;
}
}
});
recyclerView.setLayoutManager(mLayoutManager);
Where ITEM is a grid(2x column) then return 1, otherwise FULLSIZE return 2(takes 2x grid column).
hope it helped.

Unable to add second child in recyclerview

Unable to add second child in Recyclerview I am passing two different arrays to RecyclerAdapter to display two child layout with different data and views.Is there any solution to add different child layout using same header layout.I added horizontal Recyclerview in vertical Recyclerview and I want to display details like I attached the image
private void setupRecyclerView(RecyclerView recyclerView) {
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
RecyclerAdapter recyclerAdapter = new RecyclerAdapter();
int[] images = new int[]{
R.drawable.finance,
R.drawable.business,
R.drawable.financejob,
R.drawable.ecomchallenges
};
ArrayList<ChildView> childViews = new ArrayList<>();
childViews.add(new ChildView(images[0], "The \"Best\" Startup Pitch Deck - How To Raise Venture Capital", "$100"));
childViews.add(new ChildView(images[1], "An Entire MBA in 1 Course:Award Winning Business School Prof", "$100"));
childViews.add(new ChildView(images[2], "What Finance Job is for You? Explanation of 14 Finance Roles", "$100"));
childViews.add(new ChildView(images[3], "Learn To Build Beautiful HTML5 And CSS3 Websites In 1 Month", "$100"));
int[] courseImage = new int[] {
R.drawable.php,
R.drawable.development,
R.drawable.web,
R.drawable.java
};
ArrayList<CourseByType> courseByTypes = new ArrayList<>();
courseByTypes.add(new CourseByType("Technology", courseImage[0]));
courseByTypes.add(new CourseByType("Business", courseImage[1]));
courseByTypes.add(new CourseByType("Photography", courseImage[2]));
courseByTypes.add(new CourseByType("Development", courseImage[3]));
Log.d("","Above adapter");
recyclerAdapter.addItem(new GroupView("Business", childViews));
Log.d("","Below Child");
recyclerAdapter.addCourseByType(new CourseByHeader("Technology", courseByTypes));
Log.d("","Below Course");
recyclerView.setAdapter(recyclerAdapter);
}
This is the main fragment where I set the values to two different
arraylist ArrayList<ChildView> childViews = new ArrayList<>()
and
ArrayList<CourseByType> courseByTypes = new ArrayList<>()
Values of child views are passing properly but CourseByType values are not passing.This is the adapter class for this fragment class.
RecyclerAdapter.java
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {
ArrayList<PassValues> containerArrayList;
ArrayList<GroupView> groupViews;
ArrayList<CourseByHeader>courseByHeaders;
private static final int TYPE_HEADER = 0;
private static final int TYPE_ITEM = 1;
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Context context = parent.getContext();
View view = LayoutInflater.from(context).inflate(R.layout.group_title, parent, false);
return new ViewHolder(view);
}
public RecyclerAdapter(){
containerArrayList = new ArrayList<>();
groupViews = new ArrayList<>();
courseByHeaders = new ArrayList<>();
}
public void addContainer(PassValues container){
containerArrayList.add(container);
}
public void addItem(GroupView groupView){
Log.d("","Inside Group method");
groupViews.add(groupView);
}
public void addCourseByType(CourseByHeader courseByHeader){
Log.d("","Inside Course method");
courseByHeaders.add(courseByHeader);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
Log.d("", "Pass Values out of IF" + position);
ChildViewAdapter childViewAdapter = new ChildViewAdapter();
if(position == 0){
GroupView groupView = groupViews.get(position);
holder.title.setText(groupView.getTitle());
Log.d("", "Passing Values" + groupView.getTitle());
holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder.recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
holder.recyclerView.setOnFlingListener(null);
childViewAdapter.addChild(groupView.getChildViewList());
holder.recyclerView.setAdapter(childViewAdapter);
}
if (position == 1) {
CourseByHeader courseByHeader = courseByHeaders.get(position);
holder.title.setText(courseByHeader.getTitle());
Log.d("", "Passing Values" + courseByHeader.getTitle());
holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder.recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
holder.recyclerView.setOnFlingListener(null);
childViewAdapter.addCourse(courseByHeader.getCourseByTypes());
holder.recyclerView.setAdapter(childViewAdapter);
}
}
#Override
public int getItemCount() {
if(getItemViewType(0) == TYPE_HEADER)
return groupViews.size() ;
if (getItemViewType(1) == TYPE_ITEM)
return courseByHeaders.size();
else return -1;
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView title;
RecyclerView recyclerView;
public ViewHolder(View itemView) {
super(itemView);
title = (TextView)itemView.findViewById(R.id.course_title);
recyclerView = (RecyclerView)itemView.findViewById(R.id.group_recycler);
}
}
}
This RecyclerAdapter contains one RecyclerView in that first row has one image and 3 textviews and 2nd row has 1 ImageView and 1 TextView. At position first,one image and 3 textviews are shown but it's not going on 2nd view
This is the view I getting after run on emulator.
This are two child for RecyclerViews
ChildView.java
public class ChildView {
int image;
String course, price;
public ChildView(int image, String course, String price) {
this.image = image;
this.course = course;
this.price = price;
}
public int getImage() {
return image;
}
public String getCourse() {
return course;
}
public String getPrice() {
return price;
}
}
CourseByType.java
public class CourseByType {
String courseName;
int courseImage;
public CourseByType(String courseName, int courseImage) {
this.courseName = courseName;
this.courseImage = courseImage;
}
public String getCourseName() {
return courseName;
}
public int getCourseImage() {
return courseImage;
}
}
CourseByHeader.java
public class CourseByHeader {
String title;
ArrayList<CourseByType> courseByTypes;
public CourseByHeader(String title, ArrayList<CourseByType> courseByTypes) {
this.title = title;
this.courseByTypes = courseByTypes;
}
public String getTitle() {
return title;
}
public ArrayList<CourseByType> getCourseByTypes() {
return courseByTypes;
}
}
GroupView.java
public class GroupView {
String title;
ArrayList<ChildView> childViewList;
String courseBy;
ArrayList<CourseByType> courseByTypes;
public GroupView(String title, ArrayList<ChildView> childViewList) {
this.title = title;
this.childViewList = childViewList;
}
public String getTitle() {
return title;
}
public ArrayList<ChildView> getChildViewList() {
return childViewList;
}
}
Groupview and CouseByType class have title and child list for recycleradapter
ChildViewAdapter.java
public class ChildViewAdapter extends RecyclerView.Adapter {
ArrayList<ChildView> childViewList;
ArrayList<CourseByType> courseByTypes;
private static final int TYPE_HEADER = 0;
private static final int TYPE_ITEM = 1;
public class ViewHolder extends RecyclerView.ViewHolder{
public ViewHolder(View itemView) {
super(itemView);
}
}
public class GroupHolder extends ViewHolder {
public ImageView iamView;
public TextView course, price;
public GroupHolder(View itemView) {
super(itemView);
iamView = (ImageView) itemView.findViewById(R.id.course_image);
course = (TextView) itemView.findViewById(R.id.course_by);
price = (TextView) itemView.findViewById(R.id.price);
}
}
public void addCourse(ArrayList<CourseByType> courseByType){
courseByTypes = courseByType;
}
public void addChild(ArrayList<ChildView> childView){
childViewList = childView;
}
public class Course extends ViewHolder {
public ImageView courseTypeImage;
public TextView courseType;
public Course(View itemView) {
super(itemView);
courseTypeImage = (ImageView)itemView.findViewById(R.id.course_image);
courseType = (TextView)itemView.findViewById(R.id.course_name_course);
}
}
public ChildViewAdapter() {
childViewList = new ArrayList<>();
courseByTypes = new ArrayList<>();
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Context context = parent.getContext();
RecyclerView.ViewHolder vh = null;
View v;
if(viewType == TYPE_HEADER){
v = LayoutInflater.from(context).inflate(R.layout.recycler_item, parent, false);
return new GroupHolder(v);
}if(viewType == TYPE_ITEM){
v = LayoutInflater.from(context).inflate(R.layout.type_of_courses, parent, false);
return new Course(v);
}
return vh;
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if(holder instanceof GroupHolder){
Log.d("","instance of Group Holder");
ChildView childView = childViewList.get(position);
((GroupHolder)holder).iamView.setImageResource(childView.getImage());
((GroupHolder)holder).course.setText(childView.getCourse());
((GroupHolder)holder).price.setText(childView.getPrice());
return;
}
if(holder instanceof Course){
Log.d("","instance of Course ");
CourseByType courseByType = courseByTypes.get(position);
((Course)holder).courseTypeImage.setImageResource(courseByType.getCourseImage());
((Course)holder).courseType.setText(courseByType.getCourseName());
return;
}
}
#Override
public int getItemCount() {
int size;
if(childViewList.size()>0){
return size = childViewList.size();
}else return size = courseByTypes.size();
}
#Override
public int getItemViewType(int position) {
if(childViewList.size() != 0 && childViewList.size()>0){
return TYPE_HEADER;
}else return TYPE_ITEM;
}
}
This childview adapter has two view types first is one image and 3 text and second view type contain one image and one text.When I pass values from fragment only first view type get displayed and second view type not gets value from fragment.

To show multiple different views in a recyclerview, you have to override getItemViewType() in the recyclerview adapter.
//getItemViewType enables dynamic viewholder creation
#Override
public int getItemViewType(int position) {
//you will need to add a integer with variable name viewTypeCode
//for view1 set viewTypeCode = 100 and for view2 set viewTypeCode = 200
viewTypeCode = itemList.get(position).getViewTypeCode();
return viewTypeCode;
}
This is how the onCreateViewHolder will be different for multiple viewtypes. You will have to modify yours like this
#Override
public FeedViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case 100: return new FeedViewHolder(layoutInflater.inflate(R.layout.v1, parent, false),100);
case 200: return new FeedViewHolder(layoutInflater.inflate(R.layout.v2, parent, false),200);
}
return null;
}
OnBindViewHolder will be similarly modified
#Override
public void onBindViewHolder(final FeedViewHolder holder, int position) {
viewTypeCode = itemList.get(position).getViewTypeCode();
switch ( viewTypeCode) {
case 100:
//your code for v1
case 200:
//your code for v2
}
}
Similarly the ViewHolder class is modified
class FeedViewHolder extends RecyclerView.ViewHolder{
//declare variables here
public FeedViewHolder(View v, int viewType) {
super(v);
switch (viewType) {
//instead of itemView.findViewById you will have to use v.findViewById
case 100:
//your code for v1
case 200:
//your code for v2
}
}
For further reference refer to this SO answer
Don't pass two separate list.Make a custom class like this-
class MyClass {
int viewTypeCode;
CustomClass1 c1;
CustomClass2 c2;
//add the setter getter
}
In your activity while preparing the data.
List<MyClass> itemList = new ArrayList<>();
//put whatever logic you need to make the order of the list
//if CustomClass1 object is put then setViewTypeCode(100), setCustomClass2 = null
//if CustomClass2 object is put then setViewTypeCode(200), setCustomClass1 = null
After data is built, then send this to the adapter.

how to make the header of Recycle view invisible

I have a Recyclerview with header view as slider images and remaining view as normal recycler items.I am wondering if there is any way around to make the header view invisible depending upon some sort of condition.The recycler view consists of two separate layout files for this purpose: layout1 for header items and layout2 for normal recycler items and adapter will pick a layout and binds corresponding data at runtime.
This is my RecyclerView adapter RestaurantAdapter.java
public class RestaurantAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final String TAG = RestaurantAdapter.class.getName();
private List<Restaurant> mList;
private Context mContext;
private RestaurantType mRestaurantType;
private static final int RECYCLER_HEADER=0,RECYCLER_ITEMS=1;
private LayoutInflater inflater;
private SlideItemViewHolder slideItemViewHolder;
private List<ImageSliderPOJO> mData;
public RestaurantAdapter(Context context, List<Restaurant> list, RestaurantType restaurantType) {
this.mContext = context;
this.mList = list;
this.mRestaurantType = restaurantType;
inflater=LayoutInflater.from(context);
}
public void updateAdapter(List<ImageSliderPOJO> data){
this.mData = data;
this.notifyDataSetChanged();
}
#Override
public int getItemCount() {
return mList.size();
}
#Override
public int getItemViewType(int position) {
return position == 0 ? RECYCLER_HEADER : RECYCLER_ITEMS;
}
#Override
public void onBindViewHolder(final RecyclerView.ViewHolder viewHolder, final int i) {
int viewType=viewHolder.getItemViewType();
switch (viewType){
case RECYCLER_HEADER:
slideItemViewHolder = (SlideItemViewHolder) viewHolder;
slideItemViewHolder.updateHeader();
break;
case RECYCLER_ITEMS:
final RecyclerItemViewHolder holder = (RecyclerItemViewHolder) viewHolder;
final Restaurant restaurant = mList.get(i);
Picasso.with(mContext)
.load(restaurant.getVendorLogo())
.placeholder(R.mipmap.ic_launcher)
.error(R.mipmap.ic_launcher)
.into(holder.restaurentImageView);
holder.restaurentNameTextView.setText(restaurant.getName());
//Remaining code here
break;
default:
throw new RuntimeException(TAG+":Unable to bind the viewType"+viewType);
}
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
switch (viewType){
case RECYCLER_HEADER:
return new SlideItemViewHolder(inflater.inflate(R.layout.slide_show_restaurant_fragment_list,viewGroup,false));
case RECYCLER_ITEMS:
return new RecyclerItemViewHolder(inflater.inflate(R.layout.new_restautant_list_items, viewGroup, false));
default:
throw new RuntimeException(TAG+":Invalid ViewType "+viewType);
}
}
public static class RecyclerItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private ClickListener clickListener;
//Initialization here.
public RecyclerItemViewHolder(View v) {
super(v);
ButterKnife.inject(this, v);
v.setOnClickListener(this);
}
#Override
public void onClick(View v) {
clickListener.onClick(v, getPosition(), false);
}
public interface ClickListener {
/**
* Called when the view is clicked.
*
* #param v view that is clicked
* #param position of the clicked item
* #param isLongClick true if long click, false otherwise
*/
public void onClick(View v, int position, boolean isLongClick);
}
/* Setter for listener. */
public void setClickListener(ClickListener clickListener) {
this.clickListener = clickListener;
}
}
// id = 87,170
private class SlideItemViewHolder extends RecyclerView.ViewHolder {
SliderLayout sliderLayout;
LinearLayout rootLinearLayout;
public SlideItemViewHolder(View recyclerHeader) {
super(recyclerHeader);
sliderLayout = (SliderLayout) recyclerHeader.findViewById(R.id.home_slider);
rootLinearLayout = (LinearLayout) recyclerHeader.findViewById(R.id.rootLinearLayout);
}
private void updateHeader() {
if(Util.isNetworkAvailable(mContext)){
for (int i = 0; i < mData.size(); i++) {
DefaultSliderView defaultSliderView = new DefaultSliderView(mContext);
final int finalI = i;
defaultSliderView.image(mData.get(finalI).getImageUrl())
.setOnSliderClickListener(new BaseSliderView.OnSliderClickListener() {
#Override
public void onSliderClick(BaseSliderView slider) {
Restaurant restaurantById = Restaurant.searchByRestaurantId(mData.get(finalI).getTargetVendorId());
if(restaurantById != null)
openDetailFragment(restaurantById);
}
});
sliderLayout.addSlider(defaultSliderView);
}
}
}
}
public void openDetailFragment(Restaurant restaurant) {
Intent intent = new Intent(mContext, DetailTabActivity.class);
intent.putExtra(DetailTabActivity.INTENT_RESTAURANT_DATA, restaurant);
mContext.startActivity(intent);
}
public SliderLayout getSliderLayout(){
return slideItemViewHolder.sliderLayout;
}
}
And this adapter is set and updated from this fragment RestaurantFragment.java as:
private void setAdapter() {
dismissDialog();
if (getActivity() != null)
getActivity().runOnUiThread(new Runnable(){
#Override
public void run() {
if (restaurantList != null && restaurantList.size() > 0) {
restaurantRecyclerView.setVisibility(View.VISIBLE);
mEmptyListTextView.setVisibility(View.GONE);
restaurentListAdapter = new RestaurantAdapter(getActivity(), restaurantList, mRestaurantType);
restaurantRecyclerView.setAdapter(restaurentListAdapter);
restaurentListAdapter.updateAdapter(mData);
restaurantRecyclerView.addOnScrollListener(new EndlessRecyclerOnScrollListener(mLayoutManager) {
#Override
public void onLoadMore(int current_page) {
mCurrentPage = mCurrentPage + 1;
getHttpResturantData();
}
});
}
}
});
}
Is this much of an explanation helpful or should I paste more code?

Based on your code, it's possible to remove the header based on a certain condition.
Adjust your code to cater for the following:
#Override
public int getItemViewType(int position) {
if(hasHeaeder()) { // where you add the header
return position == 0 ? RECYCLER_HEADER : RECYCLER_ITEMS;
} else { // where you don't add the header
return RECYCLER_ITEMS;
}
}
This code also needs changing (currently it's wrong since it doesn't take care of the fact that the header adds 1 to the position).
final Restaurant restaurant = mList.get(i);
Replace it with
final Restaurant restaurant = hasHeader() ? mList.get(i +1) : mList.get(i);
Where hasHeader() is the code you need to write in order to determine whether or not the recycler should contain a header.