We Keep Coding

Firebase Messages get count badge The Unread new Messages Recived

I use Firebase to send messages between users, and I'd like to use a new unread message badge and the number of unread messages.
I want to help solve this problem so I can get the number of unread messages when they are received from the other user and displayed in the user's list
like this
public class MessageAdapter extends RecyclerView.Adapter<MessageAdapter.ViewHolder> {
public static final int MSG_TYPE_LEFT = 0;
public static final int MSG_TYPE_RIGHT = 1;
Typeface MR,MRR;
private Context mContext;
private List<Chat> mChat;
private String imageurl;
public View view_click;
FirebaseUser fuser;
public MessageAdapter(Context mContext, List<Chat> mChat, String imageurl){
this.mChat = mChat;
this.mContext = mContext;
this.imageurl = imageurl;
MRR = Typeface.createFromAsset(mContext.getAssets(), "fonts/myriadregular.ttf");
MR = Typeface.createFromAsset(mContext.getAssets(), "fonts/myriad.ttf");
}
#NonNull
#Override
public MessageAdapter.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
if (viewType == MSG_TYPE_RIGHT) {
View view = LayoutInflater.from(mContext).inflate(R.layout.chat_item_right, parent, false);
return new MessageAdapter.ViewHolder(view);
} else {
View view = LayoutInflater.from(mContext).inflate(R.layout.chat_item_left, parent, false);
return new MessageAdapter.ViewHolder(view);
}
}
#Override
public void onBindViewHolder(#NonNull MessageAdapter.ViewHolder holder, int position) {
Chat chat = mChat.get(position);
holder.show_message.setTypeface(MRR);
holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
chat.setSelected(!chat.isSelected());
holder.view.setBackgroundColor(chat.isSelected() ? Color.TRANSPARENT : Color.WHITE);
FirebaseDatabase.getInstance("https://pineka-social-media-mast-da52a-default-rtdb.firebaseio.com/"
).getReference("Chats")
.child(chat.getChatid())
.removeValue().addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if (task.isSuccessful()) {
View view;
final Snackbar snackbar = Snackbar.make(holder.lyt_parent, "", Snackbar.LENGTH_LONG);
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.snack_delete, null);
snackbar.getView().setBackgroundColor(Color.TRANSPARENT);
Snackbar.SnackbarLayout snackBarView = (Snackbar.SnackbarLayout) snackbar.getView();
snackBarView.setPadding(0, 0, 0, 0);
snackBarView.addView(view, 0);
snackbar.show();
// Toast.makeText(mContext, "Deleted! ="+chat.getMessage(), Toast.LENGTH_SHORT).show();
}
}
});
return false;
}
});
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view_click) {
// holder.delete.setVisibility(View.VISIBLE);
final Dialog dialog = new Dialog(mContext);
dialog.setContentView(R.layout.po);
LinearLayout copy = dialog.findViewById(R.id.copy);
LinearLayout share = dialog.findViewById(R.id.share);
LinearLayout reply = dialog.findViewById(R.id.reply);
LinearLayout delete = dialog.findViewById(R.id.remove_item);
copy.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ClipboardManager clipboard = (ClipboardManager) mContext.getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("label", chat.getMessage());
clipboard.setPrimaryClip(clip);
View view;
final Snackbar snackbar = Snackbar.make(holder.lyt_parent, "", Snackbar.LENGTH_LONG);
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.snack, null);
snackbar.getView().setBackgroundColor(Color.TRANSPARENT);
Snackbar.SnackbarLayout snackBarView = (Snackbar.SnackbarLayout) snackbar.getView();
snackBarView.setPadding(0, 0, 0, 0);
snackBarView.addView(view, 0);
snackbar.show();
dialog.dismiss();
}
});
share.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent2 = new Intent(); intent2.setAction(Intent.ACTION_SEND);
intent2.setType("text/plain");
intent2.putExtra(Intent.EXTRA_TEXT, chat.getMessage() );
mContext. startActivity(Intent.createChooser(intent2, "Share via"));
dialog.dismiss();
}
});
reply.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
delete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view_click) {
FirebaseDatabase.getInstance("https://pineka-social-media-mast-da52a-default-rtdb.firebaseio.com/"
).getReference("Chats")
.child(chat.getChatid())
.removeValue().addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if (task.isSuccessful()) {
View view;
final Snackbar snackbar = Snackbar.make(holder.lyt_parent, "", Snackbar.LENGTH_LONG);
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.snack_delete, null);
snackbar.getView().setBackgroundColor(Color.TRANSPARENT);
Snackbar.SnackbarLayout snackBarView = (Snackbar.SnackbarLayout) snackbar.getView();
snackBarView.setPadding(0, 0, 0, 0);
snackBarView.addView(view, 0);
dialog.dismiss();
snackbar.show();
// Toast.makeText(mContext, "Deleted! ="+chat.getMessage(), Toast.LENGTH_SHORT).show();
}
}
});
}
});
dialog.setCancelable(true);
dialog.show();
/*
*/
}
}
);
holder.show_message.setText(chat.getMessage());
if(chat.getTime()!=null && !chat.getTime().trim().equals("")) {
holder.time_tv.setText(holder.convertTime(chat.getTime()));
}
if (imageurl.equals("default")){
holder.profile_image.setImageResource(R.drawable.ic_profile_outline_40);
} else {
Glide.with(mContext).load(imageurl).into(holder.profile_image);
}
if (position == mChat.size()-1){
if (chat.isIsseen()){
// holder.seen.setImageResource(R.drawable.ic_baseline_check_24);
} else {
// holder.seen.setImageResource(R.drawable.ic_baseline_check_24_read);
}
} else {
// holder.seen.setVisibility(View.GONE);
}
}
#Override
public int getItemCount() {
return mChat.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
public TextView show_message;
public ImageView profile_image,seen,delete;
public TextView time_tv;
public Dialog myDialog;
public View view_click;
public LinearLayout lyt_parent;
private View view;
public ViewHolder(View itemView) {
super(itemView);
show_message = itemView.findViewById(R.id.show_message);
profile_image = itemView.findViewById(R.id.profile_image);
time_tv = itemView.findViewById(R.id.time_tv);
seen = itemView.findViewById(R.id.seen);
view = itemView;
lyt_parent= itemView.findViewById(R.id.lyt_parent);
}
public String convertTime(String time){
SimpleDateFormat formatter = new SimpleDateFormat("h:mm a");
String dateString = formatter.format(new Date(Long.parseLong(time)));
return dateString;
}
}
#Override
public int getItemViewType(int position) {
fuser = FirebaseAuth.getInstance().getCurrentUser();
if (mChat.get(position).getSender().equals(fuser.getUid())){
return MSG_TYPE_RIGHT;
} else {
return MSG_TYPE_LEFT;
}
}
}
item Uaer Massage
public class UserAdaptermsg extends RecyclerView.Adapter<UserAdaptermsg.ViewHolder> {
private Context mContext;
private List<User> mUsers;
private boolean ischat;
private OnItemClick onItemClick;
Typeface MR,MRR;
String theLastMessage;
boolean isopend ;
public UserAdaptermsg(Context mContext, OnItemClick onItemClick, List<User> mUsers, boolean ischat){
this.onItemClick = onItemClick;
this.mUsers = mUsers;
this.mContext = mContext;
this.ischat = ischat;
if(mContext!=null) {
MRR = Typeface.createFromAsset(mContext.getAssets(), "fonts/myriadregular.ttf");
MR = Typeface.createFromAsset(mContext.getAssets(), "fonts/myriad.ttf");
}
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.user_item_msg, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
final User user = mUsers.get(position);
// holder.username.setTypeface(MR);
holder.last_msg.setTypeface(MRR);
holder.badg_massage.setVisibility(View.GONE);
holder.username.setText(user.getFullname());
if (user.getImageurl().equals("default")){
holder.profile_image.setImageResource(R.drawable.ic_profile_outline_40);
} else {
Glide.with(mContext).load(user.getImageurl()).into(holder.profile_image);
}
if (ischat){
lastMessage(user.getId(), holder.last_msg);
count(user.getId(),true);
// holder.badg_massage.setVisibility(View.VISIBLE);
// holder.badg_massage.setText(mUsers.size()+"");
} else {
holder.last_msg.setVisibility(View.GONE);
}
if (ischat){
if (user.getStatus().equals("online")){
holder.img_on.setVisibility(View.VISIBLE);
holder.img_off.setVisibility(View.GONE);
} else {
holder.img_on.setVisibility(View.GONE);
holder.img_off.setVisibility(View.GONE);
}
} else {
holder.img_on.setVisibility(View.GONE);
holder.img_off.setVisibility(View.GONE);
}
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(mContext, MessageActivity.class);
intent.putExtra("userid", user.getId());
mContext.startActivity(intent);
}
});
holder.profile_image.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
onItemClick.onItemCLick(user.getId(),view);
}
});
}
#Override
public int getItemCount() {
return mUsers.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
public TextView username;
public ImageView profile_image;
private ImageView img_on;
private ImageView img_off;
private TextView last_msg;
private TextView badg_massage;
public ViewHolder(View itemView) {
super(itemView);
username = itemView.findViewById(R.id.username);
profile_image = itemView.findViewById(R.id.profile_image);
img_on = itemView.findViewById(R.id.img_on);
img_off = itemView.findViewById(R.id.img_off);
last_msg = itemView.findViewById(R.id.last_msg);
badg_massage = itemView.findViewById(R.id.badg_massage);
}
}
//check for last message
private void lastMessage(final String userid, final TextView last_msg){
theLastMessage = "default";
final FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Chats");
reference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()){
Chat chat = snapshot.getValue(Chat.class);
if (firebaseUser != null && chat != null) {
if (chat.getReceiver().equals(firebaseUser.getUid()) && chat.getSender().equals(userid) ||
chat.getReceiver().equals(userid) && chat.getSender().equals(firebaseUser.getUid())) {
theLastMessage = chat.getMessage();
}
}
}
switch (theLastMessage){
case "default":
last_msg.setText("No Message");
break;
default:
last_msg.setText(theLastMessage);
break;
}
theLastMessage = "default";
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
private void count(final String userid, final Boolean count){
isopend = false;
final FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Chats");
reference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()){
Chat chat = snapshot.getValue(Chat.class);
if (firebaseUser != null && chat != null) {
if (chat.getReceiver().equals(firebaseUser.getUid()) && chat.getSender().equals(userid) ||
chat.getReceiver().equals(userid) && chat.getSender().equals(firebaseUser.getUid())) {
isopend = chat.isIsopened();
}
}
}
if (isopend == false) {
Toast.makeText(mContext, "notopent", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(mContext, "isopend", Toast.LENGTH_SHORT).show();
}
isopend = true;
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
}
model Chat
package com.Model;
public class Chat {
private String sender;
private String receiver;
private String message;
private boolean isseen;
private String chatid;
private boolean isSelected = false;
private boolean isopened;
private String time;
public Chat(String sender, String receiver, String message, boolean isseen, String chatid, boolean isopened, String time) {
this.sender = sender;
this.receiver = receiver;
this.message = message;
this.isseen = isseen;
this.chatid = chatid;
this.isopened = isopened;
this.time = time;
}
public Chat() {
}
public String getSender() {
return sender;
}
public void setSender(String sender) {
this.sender = sender;
}
public String getReceiver() {
return receiver;
}
public void setReceiver(String receiver) {
this.receiver = receiver;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public boolean isIsseen() {
return isseen;
}
public void setIsseen(boolean isseen) {
this.isseen = isseen;
}
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
public String getChatid() {
return chatid;
}
public void setChatid(String chatid) {
this.chatid = chatid;
}
public boolean isSelected() {
return isSelected;
}
public void setSelected(boolean selected) {
isSelected = selected;
}
public boolean isIsopened() {
return isopened;
}
public void setIsopened(boolean isopened) {
this.isopened = isopened;
}
}

Nested Recycler View, Child And Parent Remove Issue

I have created a Nested recycle rview with parent and child both dynamic.Addition to both Parent and Child is working fine.Deletion from child is working fine.I want to remove parent view when all the child views for the same is removed.Confused about how could i implement the same.
Here is the child Adapter
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private List<ToDoModel> values;
private Context context;
//private OnEditListener onEditListener;
AlertDialog alertDialog;
/*public MyAdapter(List<ToDoModel> context) {
this.values = context;
this.onEditListener = onEditListener;
}*/
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView txtHeader;
public TextView txtFooter;
public ImageView mIcon;
public View layout;
public ImageView deleteItem;
public CheckBox doneButton;
public ImageView editItem;
public ViewHolder(View v) {
super(v);
layout = v;
txtHeader = (TextView) v.findViewById(R.id.firstLine);
txtFooter = (TextView) v.findViewById(R.id.secondLine);
mIcon = (ImageView) v.findViewById(R.id.icon);
deleteItem = (ImageView) v.findViewById(R.id.deleteButton);
doneButton = (CheckBox) v.findViewById(R.id.checkBox);
editItem = (ImageView) v.findViewById(R.id.editButton);
}
}
public void add(int position, ToDoModel item) {
values.add(position, item);
sort();
notifyDataSetChanged();
//notifyItemInserted(position);
}
public void replace(ToDoModel item)
{
int editPos;
editPos = values.indexOf(item);
values.set(editPos,item);
sort();
notifyDataSetChanged();
}
public void sort() {
if ((int) values.size() > 1) {
Collections.sort(values);
}
}
public void remove(int position) {
values.remove(position);
notifyDataSetChanged();
}
public MyAdapter(List<ToDoModel> myDataset) {
values = myDataset;
}
#Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
LayoutInflater inflater = LayoutInflater.from(
parent.getContext());
View v =
inflater.inflate(R.layout.todo_row_view, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
#Override
public void onBindViewHolder(ViewHolder holder, final int position) {
final ToDoModel toDoModel = values.get(position);
switch ((String) toDoModel.task) {
case "To Go":
holder.mIcon.setImageResource(R.drawable.ic_explore24px);
break;
case "To Get":
holder.mIcon.setImageResource(R.drawable.ic_shoppingbag24px);
break;
case "To Do":
holder.mIcon.setImageResource(R.drawable.ic_todo);
break;
default:
break;
}
holder.txtHeader.setText(toDoModel.header);
holder.txtFooter.setText(toDoModel.task + " | " + toDoModel.tod + " | " + toDoModel.footer);
holder.doneButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (buttonView.isChecked()) {
//holder.mIcon.setImageResource(R.drawable.ic_check_circle24px);
Toast.makeText(buttonView.getContext(), "Marked As Done", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(buttonView.getContext(), "Marked As UnDone", Toast.LENGTH_SHORT).show();
}
}
});
holder.deleteItem.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());
View view = LayoutInflater.from(v.getContext()).inflate(R.layout.delete_promptdialog,null);
Button YesButton = (Button) view.findViewById(R.id.buttonYes);
Button NoButton = (Button) view.findViewById(R.id.buttonNo);
YesButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
remove(position);
Toast.makeText(v.getContext(), "List Item Removed", Toast.LENGTH_SHORT).show();
alertDialog.dismiss();
}
});
NoButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(v.getContext(), "Delete Canceled", Toast.LENGTH_SHORT).show();
alertDialog.dismiss();
}
});
builder.setView(view);
alertDialog=builder.create();
alertDialog.show();
/*remove(position);
Toast.makeText(v.getContext(), "List Item Removed", Toast.LENGTH_SHORT).show();*/
}
});
/* holder.editItem.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
onEditListener.onEditClick(values.get(position));
//Toast.makeText(v.getContext(), "List Edit", Toast.LENGTH_SHORT).show();
}
});*/
}
/*public interface OnEditListener {
void onEditClick(ToDoModel currentData);
}*/
#Override
public int getItemCount() {
return values.size();
}
}
Here is the Parent Adapter
public class ParentAdapter extends RecyclerView.Adapter<ParentAdapter.ParentViewHolder> {
private RecyclerView.RecycledViewPool viewPool = new RecyclerView.RecycledViewPool();
public List<TodoParent> parentList;
public TodoParent todayList;
public static long todayEpochDate;
public ParentAdapter(List<TodoParent> parentList, MainFragment mainFragment) {
this.parentList = parentList;
}
public void add(int position, TodoParent item) {
parentList.add(position, item);
sort();
notifyDataSetChanged();
//notifyItemInserted(position);
}
public void sort() {
if ((int) parentList.size() > 1) {
Collections.sort(parentList);
//if(!(todayList.ParentTitle.isEmpty())) Collections.swap(parentList, parentList.indexOf(todayList), 0);
}
/* if ( todayList )
{
System.out.println("Entering Swap");
setToday(todayList);
}*/
}
public void setToday(TodoParent item) {
int todayPos;
todayPos = parentList.indexOf(item);
parentList.remove(todayPos);
notifyDataSetChanged();
parentList.add(0,item);
notifyDataSetChanged();
}
#NonNull
#Override
public ParentAdapter.ParentViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.todo_parent_view,parent,false);
ParentViewHolder vh = new ParentViewHolder(view);
return vh;
}
#RequiresApi(api = Build.VERSION_CODES.N)
#Override
public void onBindViewHolder(#NonNull ParentViewHolder holder, int position) {
TodoParent todoParent = parentList.get(position);
todoParent.ParentId = position;
Calendar mCal;
mCal = Calendar.getInstance();
int mDay = mCal.get(Calendar.DAY_OF_MONTH);
int mMonth = mCal.get(Calendar.MONTH);
int mYear = mCal.get(Calendar.YEAR);
String dateString = mDay +"/"+ (mMonth+1) +"/" + mYear;
try {
todayEpochDate = new SimpleDateFormat("dd/MM/yyyy").parse(dateString).getTime()/1000;
} catch (ParseException e) {
e.printStackTrace();
}
if((long)todayEpochDate == (long)todoParent.EpochTime)
{
holder.mTitle.setText("Today");
todayList = todoParent;
System.out.println("todayE:"+todayEpochDate);
System.out.println("SelectedE:"+todoParent.EpochTime);
}
else
{
holder.mTitle.setText(todoParent.ParentTitle);
System.out.println("today:"+todayEpochDate);
System.out.println("Selected:"+todoParent.EpochTime);
}
LinearLayoutManager layoutManager = new LinearLayoutManager(holder.childView.getContext(),
LinearLayoutManager.VERTICAL,false);
layoutManager.setInitialPrefetchItemCount(todoParent.mChildList.size());
holder.childView.setLayoutManager(layoutManager);
MyAdapter myAdapter = new MyAdapter(todoParent.mChildList);
holder.childView.setAdapter(myAdapter);
holder.childView.setRecycledViewPool(viewPool);
}
#Override
public int getItemCount() {
return parentList.size();
}
public class ParentViewHolder extends RecyclerView.ViewHolder {
public TextView mTitle;
public RecyclerView childView;
public ParentViewHolder(#NonNull View itemView) {
super(itemView);
mTitle = itemView.findViewById(R.id.mParentTitle);
childView = itemView.findViewById(R.id.mChildView);
}
}
}
remove for child is working fine. How to remove Parent here when there are no more child views?

Pass data from RecyclerView to RecyclerViewMore using Serializable - AndroidX

I want to show all items in RecyclerView in Fragment to RecyclerViewMore in Another Activity when I press "See All Items", but I getting null when I want to receive the data from RecyclerViewMore
//SectionAdapter.java
public class AdapterSectionHotTrendingNews extends RecyclerView.Adapter{
private Context mContext;
private ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews;
public AdapterSectionHotTrendingNews(Context mContext, ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews) {
this.mContext = mContext;
this.modelSectionHotTrendingNews = modelSectionHotTrendingNews;
}
#Override
public SectionHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_section_hottrendingnews, null);
return new SectionHotTrendingNewsViewHolder(v);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final SectionHotTrendingNewsViewHolder sectionHotTrendingNewsViewHolder = (SectionHotTrendingNewsViewHolder) holder;
ModelSectionHotTrendingNews modelSectionHotTrendingNewsX = modelSectionHotTrendingNews.get(position);
//Set
sectionHotTrendingNewsViewHolder.TVSectionTitle.setText(modelSectionHotTrendingNewsX.getHeaderTitle());
ArrayList singleSectionItems = modelSectionHotTrendingNewsX.getAllItemsInSection();
/*AdapterSingleHotLatestNews.RecyclerViewClickListener listenerLatestNews;
listenerLatestNews = new AdapterSingleHotLatestNews.RecyclerViewClickListener() {
#Override
public void onRowHotLatestNewsClick(View view, int position) {
}
#Override
public void onIconHotLatestNewsClick(View view, int position) {
}
};*/
AdapterSingleHotTrendingNews itemListDataAdapter = new AdapterSingleHotTrendingNews(mContext, singleSectionItems);
/*itemRowHolder.recycler_view_list.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
// Disallow ScrollView to intercept touch events.
v.getParent().requestDisallowInterceptTouchEvent(true);
break;
case MotionEvent.ACTION_UP:
//Allow ScrollView to intercept touch events once again.
v.getParent().requestDisallowInterceptTouchEvent(false);
break;
}
// Handle RecyclerView touch events.
v.onTouchEvent(event);
return true;
}
});*/
sectionHotTrendingNewsViewHolder.BTNHotTrendingNewsMore.setOnClickListener(
new View.OnClickListener() { #Override public void onClick(View v) {
Intent intent = new Intent(mContext, TabMoreHotActivity.class);
new Intent().putExtra("MoreNews", modelSectionHotTrendingNews.get(position).getAllItemsInSection());
mContext.startActivity(intent); } });
/*Glide.with(mContext)
.load(feedItem.getImageURL())
.diskCacheStrategy(DiskCacheStrategy.ALL)
.centerCrop()
.error(R.drawable.bg)
.into(feedListRowHolder.thumbView);*/
//SetRecyclerView
sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setHasFixedSize(true);
sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setAdapter(itemListDataAdapter);
sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setNestedScrollingEnabled(false);
}
#Override
public int getItemCount() {
int itemCount = modelSectionHotTrendingNews.size();
return itemCount;
}
public class SectionHotTrendingNewsViewHolder extends RecyclerView.ViewHolder {
protected TextView TVSectionTitle;
protected ImageView BTNHotTrendingNewsMore;
protected RecyclerView RecyclerViewSectionHotTrendingNews;
protected RecyclerView RecyclerViewMoreSectionHotTrendingNews;
public SectionHotTrendingNewsViewHolder(View itemView) {
super(itemView);
TVSectionTitle = (TextView) itemView.findViewById(R.id.TV_SectionTitle);
BTNHotTrendingNewsMore= (ImageView) itemView.findViewById(R.id.BTN_HotTrendingNewsMore);
RecyclerViewSectionHotTrendingNews = (RecyclerView) itemView.findViewById(R.id.RecyclerView_Section_HotTrendingNews);
RecyclerViewMoreSectionHotTrendingNews = (RecyclerView) itemView.findViewById(R.id.RecyclerViewMore_Section_HotTrendingNews);
}
}
}
//SingleAdapter.java
public class AdapterSingleHotTrendingNews extends RecyclerView.Adapter{
private Context mContext;
private ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews;
public AdapterSingleHotTrendingNews(Context mContext, ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews) {
this.mContext = mContext;
this.modelSingleHotTrendingNews = modelSingleHotTrendingNews;
}
//Container
#Override
public SingleHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_single_hottrendingnews, null);
return new SingleHotTrendingNewsViewHolder(v);
}
//Fill Container with Model Setter Getter
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final SingleHotTrendingNewsViewHolder singleHotTrendingNewsViewHolder = (SingleHotTrendingNewsViewHolder) holder;
final ModelSingleHotTrendingNews modelSingleHotTrendingNewsX = modelSingleHotTrendingNews.get(position);
//Set
singleHotTrendingNewsViewHolder.TVGameDate.setText(modelSingleHotTrendingNewsX.getGamedate());
singleHotTrendingNewsViewHolder.TVGameDescription.setText(modelSingleHotTrendingNewsX.getGamedescription());
singleHotTrendingNewsViewHolder.IMGGameImage.setImageResource(modelSingleHotTrendingNewsX.getGameimage());
singleHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final Boolean booltrendingnewssaving = modelSingleHotTrendingNewsX.getTrendingnewssaving();
final int id = modelSingleHotTrendingNewsX.getId();
if (booltrendingnewssaving == true){
Toast.makeText(v.getContext(), "Turn Off Saved News " + id, Toast.LENGTH_SHORT).show();
singleHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_off);
modelSingleHotTrendingNewsX.setTrendingnewssaving(false);
/*updateSavedNewsSaving("update_newssaving", id, false);*/
} else if(booltrendingnewssaving == false) {
Toast.makeText(v.getContext(), "Turn On Saved News " + id, Toast.LENGTH_SHORT).show();
singleHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_on);
modelSingleHotTrendingNewsX.setTrendingnewssaving(true);
/*updateSavedNewsSaving("update_newssaving", id, true);*/
}
}
});
/* Glide.with(mContext)
.load(feedItem.getImageURL())
.diskCacheStrategy(DiskCacheStrategy.ALL)
.centerCrop()
.error(R.drawable.bg)
.into(feedListRowHolder.thumbView);*/
singleHotTrendingNewsViewHolder.ROWHotTrendingNewsContainer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(v.getContext(), modelSingleHotTrendingNews.get(position).getGamedescription(), Toast.LENGTH_SHORT).show();
//Passing Data to GameDescriptionActivity
Intent intent = new Intent(mContext, GameDetailActivity.class);
intent.putExtra("ImagePKG", modelSingleHotTrendingNews.get(position).getGameimage());
intent.putExtra("NamePKG", modelSingleHotTrendingNews.get(position).getGamedate());
intent.putExtra("UrlPKG", modelSingleHotTrendingNews.get(position).getId());
intent.putExtra("DescriptionPKG", modelSingleHotTrendingNews.get(position).getGamedescription());
mContext.startActivity(intent);
}
});
}
#Override
public int getItemCount() {
int itemCount = modelSingleHotTrendingNews.size();
return itemCount;
}
public class SingleHotTrendingNewsViewHolder extends RecyclerView.ViewHolder{
TextView TVGameDate;
TextView TVGameDescription;
ImageView IMGGameImage;
ImageView ICONHotTrendingNewsSaving;
private RelativeLayout ROWHotTrendingNewsContainer;
public SingleHotTrendingNewsViewHolder(View itemView) {
super(itemView);
TVGameDate = itemView.findViewById(R.id.TV_GameDate);
TVGameDescription = itemView.findViewById(R.id.TV_GameDescription);
IMGGameImage = itemView.findViewById(R.id.IMG_GameImage);
ICONHotTrendingNewsSaving = itemView.findViewById(R.id.ICON_HotTrendingNewsSaving);
ROWHotTrendingNewsContainer = itemView.findViewById(R.id.ROW_HotTrendingNewsContainer);
}
}
}
//ModelSection.java
public class ModelSectionHotTrendingNews implements Serializable {
private String headerTitle;
private ArrayList<ModelSingleHotTrendingNews> allItemsInSection;
public ModelSectionHotTrendingNews() {
}
public String getHeaderTitle() {
return headerTitle;
}
public void setHeaderTitle(String headerTitle) {
this.headerTitle = headerTitle;
}
public ArrayList<ModelSingleHotTrendingNews> getAllItemsInSection() {
return allItemsInSection;
}
public void setAllItemsInSection(ArrayList<ModelSingleHotTrendingNews> allItemsInSection) {
this.allItemsInSection = allItemsInSection;
}
}
//ModelSingle.java
public class ModelSingleHotTrendingNews implements Serializable {
private int id;
private String gamedate;
private String gamedescription;
private int gameimage;
private Boolean trendingnewssaving;
private String value;
private String message;
public ModelSingleHotTrendingNews(int id, String gamedate, String gamedescription, int gameimage, Boolean trendingnewssaving, String value, String message) {
this.id = id;
this.gamedate = gamedate;
this.gamedescription = gamedescription;
this.gameimage = gameimage;
this.trendingnewssaving = trendingnewssaving;
this.value = value;
this.message = message;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getGamedate() {
return gamedate;
}
public void setGamedate(String gamedate) {
this.gamedate = gamedate;
}
public String getGamedescription() {
return gamedescription;
}
public void setGamedescription(String gamedescription) {
this.gamedescription = gamedescription;
}
public int getGameimage() {
return gameimage;
}
public void setGameimage(int gameimage) {
this.gameimage = gameimage;
}
public Boolean getTrendingnewssaving() {
return trendingnewssaving;
}
public void setTrendingnewssaving(Boolean trendingnewssaving) {
this.trendingnewssaving = trendingnewssaving;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
//This function SectionAdapter.java is to send data from RecyclerView in Fragment to RecyclerViewMore Activity
sectionHotTrendingNewsViewHolder.BTNHotTrendingNewsMore.setOnClickListener(
new View.OnClickListener() { #Override public void onClick(View v) {
Intent intent = new Intent(mContext, TabMoreHotActivity.class);
new Intent().putExtra("MoreNews", modelSectionHotTrendingNews.get(position).getAllItemsInSection());
mContext.startActivity(intent); } });
//I use same Model in those RecyclerViews but different Adapter
//I use RecyclerView in Fragment AdapterSection.java,AdapterSingle.java,ModelSection.java,ModelSingle.java
//I user RecyclerViewMore in Activity
AdapterMoreSection.java,AdapterMoreSingle.java,ModelSection.java,ModelSingle.java
//RecyclerViewMoreActivity.java
public class TabMoreHotActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragmentmore_tabhot);
AdapterMoreSectionHotTrendingNews adapterMoreSectionHotTrendingNews;
ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews = null;
Bundle bundle = getIntent().getExtras();
if(bundle!=null)
{
modelSectionHotTrendingNews = (ArrayList<ModelSectionHotTrendingNews>) bundle.getSerializable("MoreNews");
}
//1
RecyclerView RecyclerViewMoreSingleHotTrendingNews = findViewById(R.id.RecyclerViewMore_Single_HotTrendingNews);
RecyclerViewMoreSingleHotTrendingNews.setHasFixedSize(true);
adapterMoreSectionHotTrendingNews = new AdapterMoreSectionHotTrendingNews(this, modelSectionHotTrendingNews);
RecyclerViewMoreSingleHotTrendingNews.setAdapter(adapterMoreSectionHotTrendingNews);
RecyclerViewMoreSingleHotTrendingNews.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
//Optimized
RecyclerViewMoreSingleHotTrendingNews.setHasFixedSize(true);
RecyclerViewMoreSingleHotTrendingNews.setItemViewCacheSize(20);
}
}
//I got this error
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.indofun.android.indojoy, PID: 32309
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.ArrayList.size()' on a null object reference
at com.indofun.android.indojoy.Adapters.AdapterMore_HotTrendingNews.AdapterMoreSectionHotTrendingNews.getItemCount(AdapterMoreSectionHotTrendingNews.java:109)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep1(RecyclerView.java:4042)
at androidx.recyclerview.widget.RecyclerView.onMeasure(RecyclerView.java:3532)
at android.view.View.measure(View.java:23279)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
at android.view.View.measure(View.java:23279)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
at android.view.View.measure(View.java:23279)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:23279)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
at android.view.View.measure(View.java:23279)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:23279)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
at android.view.View.measure(View.java:23279)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:898)
at android.view.View.measure(View.java:23279)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2873)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1910)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2165)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1779)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7810)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
at android.view.Choreographer.doCallbacks(Choreographer.java:723)
at android.view.Choreographer.doFrame(Choreographer.java:658)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6938)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
//Provide the code it will help me a lot
//UPDATED
//AdapterMoreSingle
public class AdapterMoreSingleHotTrendingNews extends RecyclerView.Adapter{
private Context mContext;
private ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews;
public AdapterMoreSingleHotTrendingNews(Context mContext, ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews) {
this.mContext = mContext;
this.modelSingleHotTrendingNews = modelSingleHotTrendingNews;
}
//Container
#Override
public SingleMoreHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.itemmore_single_hottrendingnews, null);
return new SingleMoreHotTrendingNewsViewHolder(v);
}
//Fill Container with Model Setter Getter
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final SingleMoreHotTrendingNewsViewHolder singleMoreHotTrendingNewsViewHolder = (SingleMoreHotTrendingNewsViewHolder) holder;
final ModelSingleHotTrendingNews modelSingleHotTrendingNewsX = modelSingleHotTrendingNews.get(position);
//Set
singleMoreHotTrendingNewsViewHolder.TVGameDate.setText(modelSingleHotTrendingNewsX.getGamedate());
singleMoreHotTrendingNewsViewHolder.TVGameDescription.setText(modelSingleHotTrendingNewsX.getGamedescription());
singleMoreHotTrendingNewsViewHolder.IMGGameImage.setImageResource(modelSingleHotTrendingNewsX.getGameimage());
singleMoreHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final Boolean booltrendingnewssaving = modelSingleHotTrendingNewsX.getTrendingnewssaving();
final int id = modelSingleHotTrendingNewsX.getId();
if (booltrendingnewssaving == true){
Toast.makeText(v.getContext(), "Turn Off Saved News " + id, Toast.LENGTH_SHORT).show();
singleMoreHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_off);
modelSingleHotTrendingNewsX.setTrendingnewssaving(false);
/*updateSavedNewsSaving("update_newssaving", id, false);*/
} else if(booltrendingnewssaving == false) {
Toast.makeText(v.getContext(), "Turn On Saved News " + id, Toast.LENGTH_SHORT).show();
singleMoreHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_on);
modelSingleHotTrendingNewsX.setTrendingnewssaving(true);
/*updateSavedNewsSaving("update_newssaving", id, true);*/
}
}
});
/* Glide.with(mContext)
.load(feedItem.getImageURL())
.diskCacheStrategy(DiskCacheStrategy.ALL)
.centerCrop()
.error(R.drawable.bg)
.into(feedListRowHolder.thumbView);*/
singleMoreHotTrendingNewsViewHolder.ROWHotTrendingNewsContainer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(v.getContext(), modelSingleHotTrendingNews.get(position).getGamedescription(), Toast.LENGTH_SHORT).show();
//Passing Data to GameDescriptionActivity
Intent intent = new Intent(mContext, GameDetailActivity.class);
intent.putExtra("ImagePKG", modelSingleHotTrendingNews.get(position).getGameimage());
intent.putExtra("NamePKG", modelSingleHotTrendingNews.get(position).getGamedate());
intent.putExtra("UrlPKG", modelSingleHotTrendingNews.get(position).getId());
intent.putExtra("DescriptionPKG", modelSingleHotTrendingNews.get(position).getGamedescription());
mContext.startActivity(intent);
}
});
}
#Override
public int getItemCount() {
int itemCount = modelSingleHotTrendingNews.size();
return itemCount;
}
public class SingleMoreHotTrendingNewsViewHolder extends RecyclerView.ViewHolder{
TextView TVGameDate;
TextView TVGameDescription;
ImageView IMGGameImage;
ImageView ICONHotTrendingNewsSaving;
private RelativeLayout ROWHotTrendingNewsContainer;
public SingleMoreHotTrendingNewsViewHolder(View itemView) {
super(itemView);
TVGameDate = itemView.findViewById(R.id.TV_GameDate);
TVGameDescription = itemView.findViewById(R.id.TV_GameDescription);
IMGGameImage = itemView.findViewById(R.id.IMG_GameImage);
ICONHotTrendingNewsSaving = itemView.findViewById(R.id.ICON_HotTrendingNewsSaving);
ROWHotTrendingNewsContainer = itemView.findViewById(R.id.ROW_HotTrendingNewsContainer);
}
}
}
//UPDATED2 AdapterSectionMore.java
public class AdapterMoreSectionHotTrendingNews extends RecyclerView.Adapter {
private Context mContext;
private ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews;
public AdapterMoreSectionHotTrendingNews(Context mContext, ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews) {
this.mContext = mContext;
this.modelSectionHotTrendingNews = modelSectionHotTrendingNews;
}
#Override
public SectionMoreHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.itemmore_section_hottrendingnews, null);
return new SectionMoreHotTrendingNewsViewHolder(v);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final SectionMoreHotTrendingNewsViewHolder sectionMoreHotTrendingNewsViewHolder = (SectionMoreHotTrendingNewsViewHolder) holder;
ModelSectionHotTrendingNews modelSectionHotTrendingNewsX = modelSectionHotTrendingNews.get(position);
//Set
sectionMoreHotTrendingNewsViewHolder.TVSectionTitle.setText(modelSectionHotTrendingNewsX.getHeaderTitle());
// here you have to change your ArrayList to ArrayList<ModelSingleHotTrendingNews>
ArrayList<ModelSingleHotTrendingNews> singleSectionItems = modelSectionHotTrendingNewsX.getAllItemsInSection();
/*AdapterSingleHotLatestNews.RecyclerViewClickListener listenerLatestNews;
listenerLatestNews = new AdapterSingleHotLatestNews.RecyclerViewClickListener() {
#Override
public void onRowHotLatestNewsClick(View view, int position) {
}
#Override
public void onIconHotLatestNewsClick(View view, int position) {
}
};*/
AdapterMoreSingleHotTrendingNews itemListDataAdapter = new AdapterMoreSingleHotTrendingNews(mContext, singleSectionItems);
/*itemRowHolder.recycler_view_list.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
// Disallow ScrollView to intercept touch events.
v.getParent().requestDisallowInterceptTouchEvent(true);
break;
case MotionEvent.ACTION_UP:
//Allow ScrollView to intercept touch events once again.
v.getParent().requestDisallowInterceptTouchEvent(false);
break;
}
// Handle RecyclerView touch events.
v.onTouchEvent(event);
return true;
}
});*/
final String sectionTitle = modelSectionHotTrendingNewsX.getHeaderTitle();
sectionMoreHotTrendingNewsViewHolder.BTNHotTrendingNewsMore.setOnClickListener(
new View.OnClickListener() {
#Override public void onClick(View v) {
//More IN RecyclerViewMore
}
});
/*Glide.with(mContext)
.load(feedItem.getImageURL())
.diskCacheStrategy(DiskCacheStrategy.ALL)
.centerCrop()
.error(R.drawable.bg)
.into(feedListRowHolder.thumbView);*/
//SetRecyclerView
sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setHasFixedSize(true);
sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setAdapter(itemListDataAdapter);
sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setNestedScrollingEnabled(false);
}
#Override
public int getItemCount() {
int itemCount = modelSectionHotTrendingNews.size();
return itemCount;
}
public class SectionMoreHotTrendingNewsViewHolder extends RecyclerView.ViewHolder {
protected TextView TVSectionTitle;
protected ImageView BTNHotTrendingNewsMore;
protected RecyclerView RecyclerViewMoreSectionHotTrendingNews;
public SectionMoreHotTrendingNewsViewHolder(View itemView) {
super(itemView);
TVSectionTitle = (TextView) itemView.findViewById(R.id.TV_SectionTitle);
BTNHotTrendingNewsMore= (ImageView) itemView.findViewById(R.id.BTN_HotTrendingNewsMore);
RecyclerViewMoreSectionHotTrendingNews = (RecyclerView) itemView.findViewById(R.id.RecyclerViewMore_Section_HotTrendingNews);
}
}
}

Because you are passing null modelSectionHotTrendingNews to your adapter.
You just need to initialize your ArrayList in your TabMoreHotActivity
And one more thing you have to set layout manger to your recycler view before set adapter.
public class TabMoreHotActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragmentmore_tabhot);
AdapterMoreSectionHotTrendingNews adapterMoreSectionHotTrendingNews;
// here you have to initialize it
ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews = new ArrayList<>();
Bundle bundle = getIntent().getExtras();
if(bundle!=null)
{
modelSectionHotTrendingNews = (ArrayList<ModelSectionHotTrendingNews>) bundle.getSerializable("MoreNews");
}
//1
RecyclerView RecyclerViewMoreSingleHotTrendingNews = findViewById(R.id.RecyclerViewMore_Single_HotTrendingNews);
RecyclerViewMoreSingleHotTrendingNews.setHasFixedSize(true);
adapterMoreSectionHotTrendingNews = new AdapterMoreSectionHotTrendingNews(this, modelSectionHotTrendingNews);
// here have to set layout manager before set adapter
RecyclerViewMoreSingleHotTrendingNews.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
// and then you have to set adapter to recyclerview
RecyclerViewMoreSingleHotTrendingNews.setAdapter(adapterMoreSectionHotTrendingNews);
//Optimized
RecyclerViewMoreSingleHotTrendingNews.setHasFixedSize(true);
RecyclerViewMoreSingleHotTrendingNews.setItemViewCacheSize(20);
}
}
UPDATE
Change ArrayList to ArrayList<ModelSingleHotTrendingNews> inside onBindViewHolder in AdapterMoreSectionHotTrendingNews.
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final SectionMoreHotTrendingNewsViewHolder sectionMoreHotTrendingNewsViewHolder = (SectionMoreHotTrendingNewsViewHolder) holder;
ModelSectionHotTrendingNews modelSectionHotTrendingNewsX = modelSectionHotTrendingNews.get(position);
//Set
sectionMoreHotTrendingNewsViewHolder.TVSectionTitle.setText(modelSectionHotTrendingNewsX.getHeaderTitle());
// here you have to change your ArrayList to ArrayList<ModelSingleHotTrendingNews>
ArrayList<ModelSingleHotTrendingNews> singleSectionItems = modelSectionHotTrendingNewsX.getAllItemsInSection();
// reset of your codes here.

For this error
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.ArrayList.size()' on a null object reference
By #Jakir answer, you can initialize ArrayList for extra point initialize with specific size (i.e new ArrayList<>(0);) to reduce the memory usage because of array list default a lot memory of 10 objects in memory.
or
check this condition in getItem
#Override
public int getItemCount() {
return modelSectionHotTrendingNews != null && modelSectionHotTrendingNews.size();
}
It will resolve this error.
For serializable parsing in your code
Intent intent = new Intent(mContext, TabMoreHotActivity.class);
// here you create put extra in new intent not the intent that you created
new Intent().putExtra("MoreNews", modelSectionHotTrendingNews.get(position).getAllItemsInSection());
mContext.startActivity(intent);
Change this to
Intent intent = new Intent(mContext, TabMoreHotActivity.class);
// here you create put extra in new intent not the intent that you created
intent.putExtra("MoreNews", modelSectionHotTrendingNews.get(position).getAllItemsInSection());
mContext.startActivity(intent);
Happy coding.... ;)

Add item on RecycleView Android

I'm trying to add an item on RecycleView like this:
I have an object called Image
public class Image{
public String name;
public String url;
}
When I click on the button to add a new item, my code is like this:
#Override
public void addItemOnList(String url) {
adapter.addItem(new ImageObject("aaaaaa", R.drawable.close_button));
}
That is my method which inserts on the list.
public void addItem(ImageObject imageObject) {
itemList.add(imageObject);
notifyDataSetChanged();
}
My problem is when I click for the first time in additem my onBindViewHolder doesn't iterate all the list but when I check in debug mod my getItemCount is correct! So If I try to add an item after the first time all work well.
MainActivity
public class MainActivity extends AppCompatActivity implements RecyclerViewClickListener, OnStartDragListener {
private RecyclerViewAdapter adapter;
private ArrayList<ImageObject> listViewItems;
private RecyclerView recyclerView;
private ItemTouchHelper itemTouchHelper;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
recyclerView.setHasFixedSize(true);
StaggeredGridLayoutManager staggeredLayoutManager = new StaggeredGridLayoutManager(3, 1);
recyclerView.setLayoutManager(staggeredLayoutManager);
List<ImageObject> staggered = getListItemData();
adapter = new RecyclerViewAdapter(this, staggered);
recyclerView.setAdapter(adapter);
ItemTouchHelper.Callback callback = new SimpleItemTouchHelperCallback(adapter);
itemTouchHelper = new ItemTouchHelper(callback);
itemTouchHelper.attachToRecyclerView(recyclerView);
}
private List<ImageObject> getListItemData() {
listViewItems = new ArrayList<ImageObject>();
listViewItems.add(new ImageObject("Alkane", R.drawable.one));
listViewItems.add(new ImageObject("Ethane", R.drawable.two));
listViewItems.add(new ImageObject("Alkyne", R.drawable.three));
listViewItems.add(new ImageObject("Benzene", R.drawable.four));
listViewItems.add(new ImageObject("Alkane", R.drawable.one));
listViewItems.add(new ImageObject("Ethane", R.drawable.two));
listViewItems.add(new ImageObject("Alkyne", R.drawable.three));
listViewItems.add(new ImageObject("Benzene", R.drawable.four));
listViewItems.add(new ImageObject("Alkane", R.drawable.one));
listViewItems.add(new ImageObject("Ethane", R.drawable.two));
listViewItems.add(new ImageObject("Alkyne", R.drawable.three));
listViewItems.add(new ImageObject("Benzene", R.drawable.four));
return listViewItems;
}
#Override
public void addButtonClicked() {
FragmentManager fm = getSupportFragmentManager();
AlertFragment.newInstance(this).show(fm, "dialog");
}
#Override
public void addItemOnList(String url) {
adapter.addItem(new ImageObject("aaaaaa", R.drawable.close_button));
}
#Override
public void onStartDrag(RecyclerView.ViewHolder viewHolder) {
itemTouchHelper.startDrag(viewHolder);
}
}
My Adapter
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolders> implements ItemTouchHelperAdapter {
private List<ImageObject> itemList;
private MainActivity mainActivity;
private RecyclerViewClickListener recycleListener;
private OnStartDragListener dragStartListener;
public RecyclerViewAdapter(MainActivity mainActivity, List<ImageObject> itemList) {
this.itemList = itemList;
this.mainActivity = mainActivity;
this.recycleListener = mainActivity;
this.dragStartListener = mainActivity;
}
#Override
public ViewHolders onCreateViewHolder(ViewGroup parent, int viewType) {
View layoutView;
switch (viewType) {
case 1:
layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.add_item_list, null);
break;
default:
layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list, null);
break;
}
return new ViewHolders(layoutView);
}
#Override
public void onBindViewHolder(final ViewHolders holder, final int position) {
switch (holder.getItemViewType()) {
case 1:
configureViewHolderAddItem(holder, position);
break;
case 0:
configureDefaultViewHolder(holder, position);
break;
}
}
private void configureViewHolderAddItem(final ViewHolders holder, final int position) {
holder.addItemLayout = holder.itemView.findViewById(R.id.add_item_layout);
holder.addItemLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
recycleListener.addButtonClicked();
}
});
}
private void configureDefaultViewHolder(final ViewHolders holder, final int position) {
Log.e("test", "position - " + position);
Log.e("test", "name - " + itemList.get(position).getName());
holder.itemLayout = holder.itemView.findViewById(R.id.main_layout);
holder.removeItemButton = holder.itemView.findViewById(R.id.remove_item_button);
holder.itemLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
itemList.remove(holder.getLayoutPosition());
notifyItemRemoved(holder.getLayoutPosition());
notifyItemRangeChanged(holder.getLayoutPosition(), itemList.size());
}
});
holder.itemLayout.setBackgroundResource(itemList.get(position).getPhoto());
holder.itemLayout.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
dragStartListener.onStartDrag(holder);
}
return false;
}
});
//resizeTheFirstPosition(holder, position);
}
private void resizeTheFirstPosition(ViewHolders holder, int position) {
if (position == 0) {
int dimensionInDp = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
200, mainActivity.getResources().getDisplayMetrics());
holder.itemLayout.getLayoutParams().height = dimensionInDp;
holder.itemLayout.getLayoutParams().width = dimensionInDp;
holder.itemLayout.requestLayout();
}
}
public void addItem(ImageObject imageObject) {
itemList.add(imageObject);
notifyDataSetChanged();
}
#Override
public int getItemViewType(int position) {
return position == itemList.size() - 1 ? 1 : 0;
}
#Override
public int getItemCount() {
return this.itemList.size();
}
#Override
public boolean onItemMove(int fromPosition, int toPosition) {
Collections.swap(itemList, fromPosition, toPosition);
notifyItemMoved(fromPosition, toPosition);
return true;
}
#Override
public void onItemDismiss(int position) {
itemList.remove(position);
notifyItemRemoved(position);
}
public class ViewHolders extends RecyclerView.ViewHolder implements View.OnClickListener,
ItemTouchHelperViewHolder {
private ImageView removeItemButton;
private ImageView addItemButton;
private FrameLayout addItemLayout;
private RelativeLayout itemLayout;
public ViewHolders(View itemView) {
super(itemView);
}
#Override
public void onClick(View view) {
itemList.remove(getLayoutPosition());
//notifyItemRemoved(getLayoutPosition());
notifyItemRangeChanged(getLayoutPosition(), itemList.size());
Toast.makeText(mainActivity, "Removed item- " + getLayoutPosition(), Toast.LENGTH_SHORT).show();
}
#Override
public void onItemSelected() {
itemView.setBackgroundColor(Color.LTGRAY);
}
#Override
public void onItemClear() {
itemView.setBackgroundColor(0);
}
}

Finally, I fixed this. I don't know why but I change how I insert on the list
Old code:
public void addItem(ImageObject imageObject) {
itemList.add(imageObject);
notifyDataSetChanged();
}
New code:
public void addItem(ImageObject imageObject) {
itemList.add(itemList.size() - 1, imageObject);
notifyDataSetChanged();
}

onClickListener in RecyclerView.ViewHolder

I've got a RecyclerView.ViewHolder and RecyclerView.Adapter, I need after click on item and then send information about this item to another Activity.
PlacesAdapter.java
public class PlacesAdapter extends RecyclerView.Adapter<PlacesViewHolder> {
private PlacesActivity placesActivity;
Context context;
private int position;
List<Places> places;
public PlacesAdapter(List<Places> places) {
this.places = places;}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
#Override
public PlacesViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.places_view, viewGroup, false);
PlacesViewHolder pvh = new PlacesViewHolder(v);
return pvh;
}
#Override
public void onBindViewHolder(PlacesViewHolder personViewHolder, int i) {
personViewHolder.name.setText(places.get(i).name);
personViewHolder.address.setText(places.get(i).address);
Picasso.with(personViewHolder.itemView.getContext())
.load(places.get(i).photo)
.into(personViewHolder.getPhoto());
}
#Override
public int getItemCount() {
return places.size();
}
}
PlacesViewHolder.java
In this line "intent.putExtra(PlacesDetail.PLACES_NAME,);" How can I send name?
public class PlacesViewHolder extends RecyclerView.ViewHolder {
CardView cv;
public TextView name;
public TextView address;
public ImageView photo;
public PlacesViewHolder(final View itemView) {
super(itemView);
cv = (CardView)itemView.findViewById(R.id.cv);
name = (TextView)itemView.findViewById(R.id.person_name);
address = (TextView)itemView.findViewById(R.id.person_age);
photo = (ImageView)itemView.findViewById(R.id.person_photo);
itemView.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
Context context = v.getContext();
Intent intent = new Intent(context, PlacesDetail.class);
intent.putExtra(PlacesDetail.PLACES_NAME,);
context.startActivity(intent);
}
});
}
public TextView getAddress() {
return address;
}
public TextView getName() {
return name;
}
public ImageView getPhoto() {
return photo;
}
}

This is the complete example of custom Adapter where i'm able to get the details of particular items. In MainActivity you need to set the adapter :
adapter = new MyAdapter(getApplicationContext(), account_no, title, aFN1, aLN1,aFN2, aLN2,aFN3, aLN3,isavilable,waitlist,flag);
adapter.notifyDataSetChanged();
mRecyclerView.setAdapter(adapter);
Now see the code for the custom Adapter :
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
String TAG = "MyAdapter";
Context context;
private String[] accountNo;
private String[] title;
private String[] afn1;
private String[] aln1;
private String[] afn2;
private String[] aln2;
private String[] afn3;
private String[] aln3;
private String[] isAvailable;
private String[] waitlist;
private int flag;
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView account_no,title,afn1,afn2,aln1,aln2,color,is_available;
private ImageView img_android;
CardView cardView;
public ViewHolder(CardView v) {
super(v);
account_no = (TextView)v.findViewById(R.id.acctno);
title = (TextView)v.findViewById(R.id.title);
afn1 = (TextView) v.findViewById(R.id.afn1);
cardView = v;
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(Context context, String[] accountNo,String[] title,String[] afn1,String[] aln1,String[] afn2,String[] aln2,String[] afn3,String[] aln3,String[] isAvailable, String[] waitlist,int flag) {
this.context = context;
this.accountNo = accountNo;
this.title = title;
this.afn1 = afn1;
this.aln1 = aln1;
this.afn2 = afn2;
this.aln2 = aln2;
this.afn3 = afn3;
this.aln3 = aln3;
this.isAvailable = isAvailable;
this.waitlist = waitlist;
this.flag = flag;
Log.d(TAG,afn1.toString() +aln1+afn2+aln2+afn3+aln3.toString()+waitlist);
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
CardView cv = (CardView) LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item, parent, false);
return new ViewHolder(cv);
}
#Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
final CardView cardView = holder.cardView;
final TextView accountno = (TextView)cardView.findViewById(R.id.acctno);
accountno.setText(accountNo[position]);
final TextView titletxt = (TextView)cardView.findViewById(R.id.title);
titletxt.setText(title[position]);
final TextView afn1txt = (TextView) cardView.findViewById(R.id.afn1);
afn1txt.setText(afn1[position]+" "+aln1[position]);
Log.d(TAG,waitlist[position]);
cardView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int id = getItemViewType(position);
SharedPreferences sharedPreferences = context.getSharedPreferences(Constant.MYPREFERENCE,Context.MODE_PRIVATE);
SharedPreferences.Editor edit = sharedPreferences.edit();
edit.putString(Constant.ACCOUNT,accountNo[position]);
edit.putString(Constant.TITLE,title[position]);
edit.putString(Constant.AFN1,afn1[position]);
edit.putString(Constant.ALN1,aln1[position]);
edit.putString(Constant.AFN2,afn2[position]);
edit.putString(Constant.ALN2,aln2[position]);
edit.putString(Constant.AFN3,afn3[position]);
edit.putString(Constant.ALN3,aln3[position]);
edit.putBoolean(Constant.IS_AVAILABLE, Boolean.parseBoolean(isAvailable[position].toUpperCase()));
edit.putString(Constant.WAITLIST,waitlist[position]);
Log.d("WaitingNo2 :",""+String.valueOf(waitlist[position]));
edit.commit();
Intent intent = new Intent(v.getContext(), DetailsActivity.class);
v.getContext().startActivity(intent);
}
});
}
// Return the size of your dataset (invoked by the layout manager)
#Override
public int getItemCount() {
return accountNo.length;
}
}
After All that get the value from sharedPreferences in the Activity which is called on Card Click:
preferences = getSharedPreferences("myshared", Context.MODE_PRIVATE);
AccountNo = sharedPreferences.getString(Constant.ACCOUNT,null).toUpperCase();
title = sharedPreferences.getString(Constant.TITLE,null).toUpperCase();
afn1 = sharedPreferences.getString(Constant.AFN1,null).toUpperCase();
aln1 = sharedPreferences.getString(Constant.ALN1,null).toUpperCase();
afn2 = sharedPreferences.getString(Constant.AFN2,null).toUpperCase();
aln2 = sharedPreferences.getString(Constant.ALN2,null).toUpperCase();
afn3 = sharedPreferences.getString(Constant.AFN3,null).toUpperCase();
aln3 = sharedPreferences.getString(Constant.ALN3,null).toUpperCase();
isAvailable = sharedPreferences.getBoolean(Constant.IS_AVAILABLE,isAvailable);
waitlist = sharedPreferences.getString(Constant.WAITLIST,waitlist);
Now do whatever you want and enjoy the code.

You can achieve this by creating an interface inside your adapter for an itemclicklistener and then you can set onItemClickListener from your PlacesActivity.
Somewhere inside your PlacesAdapter you would need the following:
private onRecyclerViewItemClickListener mItemClickListener;
public void setOnItemClickListener(onRecyclerViewItemClickListener mItemClickListener) {
this.mItemClickListener = mItemClickListener;
}
public interface onRecyclerViewItemClickListener {
void onItemClickListener(View view, int position, String places_name);
}
Then inside your ViewHolder (which I've added as an inner class inside my adapter), you would apply the listener to the components you'd like the user to click, like so:
class PlacesViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
PlacesViewHolder(View view) {
super(view);
view.setOnClickListener(this);
}
#Override
public void onClick(View v) {
if (mItemClickListener != null) {
mItemClickListener.onItemClickListener(v, getAdapterPosition(), PlacesDetail.PLACES_NAME);
}
}
}
This example shows an onClickListener being applied to the view inside PlacesViewHolder.
recyclerView.setAdapter(adapter);// set adapter on recyclerview
adapter.notifyDataSetChanged();// Notify the adapter
adapter.setOnItemClickListener(new PlacesAdapter.onRecyclerViewItemClickListener() {
#Override
public void onItemClickListener(View view, int position, String places_name) {
//perform click logic here (places_name is passed)
}
});
To implement this code, you would setOnItemClickListener to your adapter inside PlacesActivity as shown above.

try this , it's work with me correctly
Create a new class and this code
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;
public interface OnItemClickListener {
public void onItemClick(View view, int position);
public void onLongItemClick(View view, int position);
}
GestureDetector mGestureDetector;
public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && mListener != null) {
mListener.onLongItemClick(child, recyclerView.getChildAdapterPosition(child));
}
}
});
}
#Override public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
View childView = view.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
return true;
}
return false;
}
#Override public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) { }
#Override
public void onRequestDisallowInterceptTouchEvent (boolean disallowIntercept){}
}
And in your Activity add this to your adapter implementation
mRecyclerView.addOnItemTouchListener(
new RecyclerItemClickListener(getActivity(), mRecyclerView, new RecyclerItemClickListener.OnItemClickListener() {
#Override
public void onItemClick(View view, int position) {
// do something
}
}
}
#Override
public void onLongItemClick(View view, int position) {
// do whatever
}
})
);