Recyclerview :- Multiple items get selectied when one item selected after scrolled - java

#Override
public void onBindViewHolder(final ViewHolder holder, int position) {
final XContacts mContact = visibleObjects.get(position);
holder.Name.setText(mContact.getName());
holder.InviteTextView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
holder.InviteTextView.setText("INVITED");
}
});
}
holder.Name.setText :- Here i am names to recyclerview
holder.InviteTextView.setOnClickListener :- When I click on one item[invite]. After I scroll down multiple items are get invited without that item being clicked on.
My problem is:
Abninav kashayp invited if I scroll down I get problems

RecyclerView, as the name says, is recycling views, that's why you are seeing 'INVITED' in other views.
In order to fix the issue, in onClickListener you should set a flag in your XContacts object:
mContact.setInvited(true);
Then you should change your onBindViewHolder code to also set the InviteTextView, just after setting the Name:
if (mContact.isInvited()) {
holder.InviteTextView.setText("INVITED");
}
else {
holder.InviteTextView.setText("INVITE");
}

Related

Identify a button click on list view android

I have created a ListView using a custom adapter that extends ArrayAdapter<String>. I need to add the item name to an ArrayList when it clicks on the + button.
You can do it exactly as usual (like in MainActivity), just link it in GetView(...)
Inside your ArrayAdapter.java , add this:
private OnItemClickListener mListener;
public interface OnItemClickListener
{
void onAddClick(int position);
}
public void setOnItemClickListener(OnItemClickListener listener)
{
mListener = listener;
}
Inside your Holder Function on same file, make this:
AddButtonVariable.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(listener != null)
{
int position = getAdapterPosition();
if(position != ListView.NO_POSITION)
{
listener.onAddClick(position);
}
}
}
});
Inside in your onResponse function of Activity.java file add this, after setAdapter:
listAdapter.setOnItemClickListener(new ArrayAdapter.OnItemClickListener() {
#Override
public void onAddClick(int position){
functiontoAdd(String.valueOf(position));
}
});
Now, at last, inside your Activity.Java file, at the end (before closing bracket of class), add this:
private void functiontoAdd(String position)
{
// rest of the code to add item in cart
}
Look, it is simpler with using Recycler view instead of list view. But it is ok if you already created.
listview.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> adapter, View v, int position,
long id)
{
//I am assuming the ArrayAdapter is having list of dish name as string if the list is of Custom class please change the below code as per it.
String dish = (String)adapter.getItemAtPosition(position);
}
});
adapter AdapterView: The AdapterView where the click happened.
view View: The view within the AdapterView that was clicked (this will be a view provided by the adapter)
position int: The position of the view in the adapter.
id long: The row id of the item that was clicked.

Why won't my new activity start on startActivity(intent)? [duplicate]

I'm trying to implement a way to handle item selection on a RecyclerView. I personally don't like the way suggested in some answers on SO of passing through gestures, and I thought that implementing an OnClickListener, as suggested here and here, was waaay cleaner.
The fact is that... this pattern doesn't actually work! I'm really not able to understand why my OnClickListener.onClick is never called. It's kinda like another method intercepts the click before onClick can take care of it.
This is my code:
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView tvName;
ImageView star;
public ViewHolder(View itemView) {
super(itemView);
tvName = (TextView) itemView.findViewById(R.id.CHAT_ITEM_name);
star = (ImageView) itemView.findViewById(R.id.CHAT_ITEM_star);
Fonts.setTypeface(tvName, regular);
}
#Override
public void onClick(View view) {
int position = getLayoutPosition();
select(position);
}
}
Unfortunately it's very important for me to able to access the position of the clicked item in the whole dataset, in order to remove it, so doing something like indexOfChild isn't acceptable too: I tried, but this method gives you the position of the item in the visibile part of the list, thus making list.remove(position) impossible.
Looking at the updated code: you are not setting the onClickListener to any of the views in the ViewHolder. It is an understandable mistake to forget the click listener.
Just use:
tvName.setOnClickListener(this);
star.setOnClickListener(this);
You can set to both or just one of them. You can also simply get the parent layout of these two views, so that the whole item itself in the adapter can be clickable.
itemView.setOnClickListener(this);
You can do it in your onBindViewHolder
#Override
public void onBindViewHolder(ReportViewHolder holder, int position {
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// handle your click here.
} });
}
Simplely Click Handler your ViewHolder. Recycler View don't have special attaching click handlers like ListView which has the method setOnItemClickListener().
** public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
** in public ViewHolder(Context context, View itemView) set public void onClick(View view)
** get position by: int position = getLayoutPosition(); User user = users.get(position);

How to update RecyclerView item without animation?

I have a RecyclerView. When I click a button inside an item in RecyclerView, I want to change the color of a View in that item. The following is my code and it works fine. But, the problem is the item will have an animation which is ugly. I want to update the item without the animation. How should I do that? By the way, I don't want to turn off the animation, only for this click event.
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public ImageView imageView;
public Button button;
public ItemViewHolder(View view) {
super(view);
//do something
button.setOnClickListener(this);
}
#Override
public void onClick(View view) {
//change color
notifyItemChanged(getAdapterPosition());
}
}
Try this
notifyItemChanged(position, Object);
This will update the position without animating it as we are passing our Object in it.
Try this and do let me know.
For Kotlin you can use
notifyItemChanged(int position, #Nullable Object payload)
Based on the Rakshit's answer, in Kotlin 1.2 the following code works fine:
notifyItemChanged(position, Unit)
There is a dedicated method to disable just item changed animations:
((SimpleItemAnimator) myRecyclerView.getItemAnimator()).setSupportsChangeAnimations(false);
Ref.: https://developer.android.com/reference/androidx/recyclerview/widget/SimpleItemAnimator
in kotlin : recyclerView.itemAnimator = null
in java : recyclerView.setItemAnimator(null);
developer said :
A null return value indicates that there is no animator and that item changes will happen without any animations.
https://developer.android.com/reference/android/support/v7/widget/RecyclerView.html#getItemAnimator()
recyclerView.getItemAnimator().setChangeDuration(0);
Or this.
Try this
csRecyclerView.getItemAnimator().setChangeDuration(0);
for more information RecyclerView.ItemAnimator
Try this:
public ItemViewHolder(View view) {
super(view);
//do something
button.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
holder.itemView.setBackgroundColor(Color.parseColor("#000000"));
notifyDataSetChanged();
});;
}
}

How to keep track of the selected items in a RecyclerView in Android?

How does one achieve a consistent item selection with RecyclerView ? I get the whole idea of RecyclerView recycling old views and what not. My problem is I have a list of items with an icon on each item, when an item is clicked, the icon changes colour. I managed to achieve all of this, but I just realised, as I scroll down the list, that other items have their icons changed too, and when I scroll back to the item I clicked on, the icon is no longer in the "clicked color".
Does anyone know how to keep track of the selected items? I keep seeing something called SparseBooleanArray, but I am not sure how to implement it.
Here is my adapter code:
public class TableRVAdapter extends RecyclerView.Adapter<TableRVAdapter.TableHolder> {
List<Tables> tableList;
private SparseBooleanArray selectedItems;
public TableRVAdapter(List<Tables> tableList)
{
this.tableList = tableList;
selectedItems = new SparseBooleanArray();
// setHasStableIds(true);
}
class TableHolder extends RecyclerView.ViewHolder
{
TextView tableTV;
CardView tableCV;
View circle;
View parentView;
TableHolder(final View itemView)
{
super(itemView);
tableTV = (TextView)itemView.findViewById(R.id.tableTV);
tableCV = (CardView)itemView.findViewById(R.id.tableCV);
circle = itemView.findViewById(R.id.statusCircle);
itemView.setClickable(true);
parentView = itemView;
tableCV.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
circle.setBackgroundResource(R.drawable.circle);
}
});
}
/*
#Override
public void onClick(View view) {
if (selectedItems.get(getAdapterPosition(), false)) {
tableCV.setSelected(false);
circle.setBackgroundResource(R.drawable.circle2);
}
else {
selectedItems.put(getAdapterPosition(), true);
tableCV.setSelected(true);
circle.setBackgroundResource(R.drawable.circle);
}
}*/
}
#Override
public TableHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.table_item,parent,false);
TableHolder tableHolder = new TableHolder(view);
return tableHolder;
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView)
{
super.onAttachedToRecyclerView(recyclerView);
}
#Override
public void onBindViewHolder(TableHolder holder, int position) {
holder.tableTV.setText(tableList.get(position).getTableNumber());
}
/**
* Returns the total number of items in the data set hold by the adapter.
*
* #return The total number of items in this adapter.
*/
#Override
public int getItemCount() {
return tableList.size();
}
}
I know this question is already answered but someone might find this answer useful and easier.
There is one useful method in the recycler view is onViewRecycled.
This can help you to get away from the pressed state. When working with the images/drawables in the recylcer view when some of the elements doesn't use the drawables, previews recycler view's drawn image will be present and it makes look all the data wrong as it happened with you with your selected view.
To achieve this in a more simpler way you can use this method to clear the drawn images to reset its values.
For example, you mark you selected element's background to green, and some of your views contains images(Note: Only some of your elements), than use this method as like this:
#Override
public void onViewRecycled(MyViewHolder holder) {
super.onViewRecycled(holder);
// Set ImageView's Drawable as transperent
holder.myImageView.setBackgroundColor(ContextCompat.getColor(getApplicationContext(), android.R.color.transparent));
// Set background color as transperent
holder.bgContainer.setBackgroundColor(ContextCompat.getColor(getApplicationContext(), android.R.color.transparent));
}
And now you can manage an ArrayList of integers with ids/position of selected elements (using onClick method on recycler view's item).
With onBindViewHolder(MyViewHolder myViewHolder, int position) you can normally fill the data. And for setting background you can simply check if the id/position is in ArrayList or not (If true, set background color green else leave it as it is. As it will be managed by onViewRecylcer method and wont affect other scrolled items with green background even if it is not selected).
Hope it will help someone and make the recyler view with selection a bit more easier.
RecyclerView.adapter has got 2 important functions to override:
onCreateViewHolder(parent, viewType)
onBindVIewHolder(viewholder, position)
The first function is used to inflate views that will be used inside the recyclerview, the second is used to bind the data you have to this view, and thus set the correct viewstate on the view.
The recyclerview itself will only inflate a certain amount of views and then will start to re-use already inflated views (hence recyclerview). So you need to set the correct state for each item in onBindViewholder() and use the item in your collection on that position to set the correct viewState.
For your example: change the color of the icon, dependent on a boolean value in your objects, eg : isPressed
You have to save the instance like this
if (isPressed) {
icon.setCustomIcon();
} else {
icon.setDefaultIcon();
}
if you have a custom object to have a boolean isPressed or something similar, this should work

How to call bindViewHolder when RecyclerView data changes [duplicate]

I have a RecyclerView with an TextView text box and a cross button ImageView. I have a button outside of the recyclerview that makes the cross button ImageView visible / gone.
I'm looking to remove an item from the recylerview, when that items cross button ImageView is pressed.
My adapter:
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> implements View.OnClickListener, View.OnLongClickListener {
private ArrayList<String> mDataset;
private static Context sContext;
public MyAdapter(Context context, ArrayList<String> myDataset) {
mDataset = myDataset;
sContext = context;
}
#Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.my_text_view, parent, false);
ViewHolder holder = new ViewHolder(v);
holder.mNameTextView.setOnClickListener(MyAdapter.this);
holder.mNameTextView.setOnLongClickListener(MyAdapter.this);
holder.mNameTextView.setTag(holder);
return holder;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.mNameTextView.setText(mDataset.get(position));
}
#Override
public int getItemCount() {
return mDataset.size();
}
#Override
public void onClick(View view) {
ViewHolder holder = (ViewHolder) view.getTag();
if (view.getId() == holder.mNameTextView.getId()) {
Toast.makeText(sContext, holder.mNameTextView.getText(), Toast.LENGTH_SHORT).show();
}
}
#Override
public boolean onLongClick(View view) {
ViewHolder holder = (ViewHolder) view.getTag();
if (view.getId() == holder.mNameTextView.getId()) {
mDataset.remove(holder.getPosition());
notifyDataSetChanged();
Toast.makeText(sContext, "Item " + holder.mNameTextView.getText() + " has been removed from list",
Toast.LENGTH_SHORT).show();
}
return false;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView mNumberRowTextView;
public TextView mNameTextView;
public ViewHolder(View v) {
super(v);
mNameTextView = (TextView) v.findViewById(R.id.nameTextView);
}
}
}
My layout is:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_vertical"
android:id="#+id/layout">
<TextView
android:id="#+id/nameTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp"
android:padding="5dp"
android:background="#drawable/greyline"/>
<ImageView
android:id="#+id/crossButton"
android:layout_width="16dp"
android:layout_height="16dp"
android:visibility="gone"
android:layout_marginLeft="50dp"
android:src="#drawable/cross" />
</LinearLayout>
How can I get something like an onClick working for my crossButton ImageView? Is there a better way? Maybe changing the whole item onclick into a remove the item? The recyclerview shows a list of locations that need to be edited. Any technical advice or comments / suggestions on best implementation would be hugely appreciated.
I have done something similar.
In your MyAdapter:
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public CardView mCardView;
public TextView mTextViewTitle;
public TextView mTextViewContent;
public ImageView mImageViewContentPic;
public ImageView imgViewRemoveIcon;
public ViewHolder(View v) {
super(v);
mCardView = (CardView) v.findViewById(R.id.card_view);
mTextViewTitle = (TextView) v.findViewById(R.id.item_title);
mTextViewContent = (TextView) v.findViewById(R.id.item_content);
mImageViewContentPic = (ImageView) v.findViewById(R.id.item_content_pic);
//......
imgViewRemoveIcon = (ImageView) v.findViewById(R.id.remove_icon);
mTextViewContent.setOnClickListener(this);
imgViewRemoveIcon.setOnClickListener(this);
v.setOnClickListener(this);
mTextViewContent.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
if (mItemClickListener != null) {
mItemClickListener.onItemClick(view, getPosition());
}
return false;
}
});
}
#Override
public void onClick(View v) {
//Log.d("View: ", v.toString());
//Toast.makeText(v.getContext(), mTextViewTitle.getText() + " position = " + getPosition(), Toast.LENGTH_SHORT).show();
if(v.equals(imgViewRemoveIcon)){
removeAt(getPosition());
}else if (mItemClickListener != null) {
mItemClickListener.onItemClick(v, getPosition());
}
}
}
public void setOnItemClickListener(final OnItemClickListener mItemClickListener) {
this.mItemClickListener = mItemClickListener;
}
public void removeAt(int position) {
mDataset.remove(position);
notifyItemRemoved(position);
notifyItemRangeChanged(position, mDataSet.size());
}
Edit:
getPosition() is deprecated now, use getAdapterPosition() instead.
first of all, item should be removed from the list!
mDataSet.remove(getAdapterPosition());
then:
notifyItemRemoved(getAdapterPosition());
notifyItemRangeChanged(getAdapterPosition(), mDataSet.size()-getAdapterPosition());
if still item not removed use this magic method :)
private void deleteItem(int position) {
mDataSet.remove(position);
notifyItemRemoved(position);
notifyItemRangeChanged(position, mDataSet.size());
holder.itemView.setVisibility(View.GONE);
}
Kotlin version
private fun deleteItem(position: Int) {
mDataSet.removeAt(position)
notifyItemRemoved(position)
notifyItemRangeChanged(position, mDataSet.size)
holder.itemView.visibility = View.GONE
}
The Problem
RecyclerView was built to display data in an efficient and responsive manner.
Usually you have a dataset which is passed to your adapter and is looped through to display your data.
Here your dataset is:
private ArrayList<String> mDataset;
The point is that RecyclerView is not connected to your dataset, and therefore is unaware of your dataset changes.
It just reads data once and displays it through your ViewHolder, but a change to your dataset will not propagate to your UI.
This means that whenever you make a deletion/addition on your data list, those changes won't be reflected to your RecyclerView directly. (i.e. you remove the item at index 5, but the 6th element remains in your recycler view).
A (old school) solution
RecyclerView exposes some methods for you to communicate your dataset changes, reflecting those changes directly on your list items.
The standard Android APIs allow you to bind the process of data removal (for the purpose of the question) with the process of View removal.
The methods we are talking about are:
notifyItemChanged(index: Int)
notifyItemInserted(index: Int)
notifyItemRemoved(index: Int)
notifyItemRangeChanged(startPosition: Int, itemCount: Int)
notifyItemRangeInserted(startPosition: Int, itemCount: Int)
notifyItemRangeRemoved(startPosition: Int, itemCount: Int)
A Complete (old school) Solution
If you don't properly specify what happens on each addition, change or removal of items, RecyclerView list items are animated unresponsively because of a lack of information about how to move the different views around the list.
The following code will allow RecyclerView to precisely play the animation with regards to the view that is being removed (And as a side note, it fixes any IndexOutOfBoundExceptions, marked by the stacktrace as "data inconsistency").
void remove(position: Int) {
dataset.removeAt(position)
notifyItemChanged(position)
notifyItemRangeRemoved(position, 1)
}
Under the hood, if we look into RecyclerView we can find documentation explaining that the second parameter we pass to notifyItemRangeRemoved is the number of items that are removed from the dataset, not the total number of items (As wrongly reported in some others information sources).
/**
* Notify any registered observers that the <code>itemCount</code> items previously
* located at <code>positionStart</code> have been removed from the data set. The items
* previously located at and after <code>positionStart + itemCount</code> may now be found
* at <code>oldPosition - itemCount</code>.
*
* <p>This is a structural change event. Representations of other existing items in the data
* set are still considered up to date and will not be rebound, though their positions
* may be altered.</p>
*
* #param positionStart Previous position of the first item that was removed
* #param itemCount Number of items removed from the data set
*/
public final void notifyItemRangeRemoved(int positionStart, int itemCount) {
mObservable.notifyItemRangeRemoved(positionStart, itemCount);
}
Open source solutions
You can let a library like FastAdapter, Epoxy or Groupie take care of the business, and even use an observable recycler view with data binding.
New ListAdapter
Google recently introduced a new way of writing the recycler view adapter, which works really well and supports reactive data.
It is a new approach and requires a bit of refactoring, but it is 100% worth switching to it, as it makes everything smoother.
here is the documentation, and here a medium article explaining it
Here are some visual supplemental examples. See my fuller answer for examples of adding and removing a range.
Add single item
Add "Pig" at index 2.
String item = "Pig";
int insertIndex = 2;
data.add(insertIndex, item);
adapter.notifyItemInserted(insertIndex);
Remove single item
Remove "Pig" from the list.
int removeIndex = 2;
data.remove(removeIndex);
adapter.notifyItemRemoved(removeIndex);
Possibly a duplicate answer but quite useful for me. You can implement the method given below in RecyclerView.Adapter<RecyclerView.ViewHolder>
and can use this method as per your requirements, I hope it will work for you
public void removeItem(#NonNull Object object) {
mDataSetList.remove(object);
notifyDataSetChanged();
}
I tried all the above answers, but inserting or removing items to recyclerview causes problem with the position in the dataSet. Ended up using delete(getAdapterPosition()); inside the viewHolder which worked great at finding the position of items.
The problem I had was I was removing an item from the list that was no longer associated with the adapter to make sure you are modifying the correct adapter you can implement a method like this in your adapter:
public void removeItemAtPosition(int position) {
items.remove(position);
}
And call it in your fragment or activity like this:
adapter.removeItemAtPosition(position);
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private Context context;
private List<cardview_widgets> list;
public MyAdapter(Context context, List<cardview_widgets> list) {
this.context = context;
this.list = list;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(this.context).inflate(R.layout.fragment1_one_item,
viewGroup, false);
return new MyViewHolder(view);
}
public static class MyViewHolder extends RecyclerView.ViewHolder {
TextView txtValue;
TextView txtCategory;
ImageView imgInorEx;
ImageView imgCategory;
TextView txtDate;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
txtValue= itemView.findViewById(R.id.id_values);
txtCategory= itemView.findViewById(R.id.id_category);
imgInorEx= itemView.findViewById(R.id.id_inorex);
imgCategory= itemView.findViewById(R.id.id_imgcategory);
txtDate= itemView.findViewById(R.id.id_date);
}
}
#NonNull
#Override
public void onBindViewHolder(#NonNull final MyViewHolder myViewHolder, int i) {
myViewHolder.txtValue.setText(String.valueOf(list.get(i).getValuee()));
myViewHolder.txtCategory.setText(list.get(i).getCategory());
myViewHolder.imgInorEx.setBackgroundColor(list.get(i).getImg_inorex());
myViewHolder.imgCategory.setImageResource(list.get(i).getImg_category());
myViewHolder.txtDate.setText(list.get(i).getDate());
myViewHolder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
list.remove(myViewHolder.getAdapterPosition());
notifyDataSetChanged();
return false;
}
});
}
#Override
public int getItemCount() {
return list.size();
}}
i hope this help you.
if you want to remove item you should do this:
first remove item:
phones.remove(position);
in next step you should notify your recycler adapter that you remove an item by this code:
notifyItemRemoved(position);
notifyItemRangeChanged(position, phones.size());
but if you change an item do this:
first change a parameter of your object like this:
Service s = services.get(position);
s.done = "Cancel service";
services.set(position,s);
or new it like this :
Service s = new Service();
services.set(position,s);
then notify your recycler adapter that you modify an item by this code:
notifyItemChanged(position);
notifyItemRangeChanged(position, services.size());
hope helps you.
String str = arrayList.get(position);
arrayList.remove(str);
MyAdapter.this.notifyDataSetChanged();
To Method onBindViewHolder Write This Code
holder.remove.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Cursor del=dbAdapter.ExecuteQ("delete from TblItem where Id="+values.get(position).getId());
values.remove(position);
notifyDataSetChanged();
}
});
Incase Anyone wants to implement something like this in Main class instead of Adapter class, you can use:
public void removeAt(int position) {
peopleListUser.remove(position);
friendsListRecycler.getAdapter().notifyItemRemoved(position);
friendsListRecycler.getAdapter().notifyItemRangeChanged(position, peopleListUser.size());
}
where friendsListRecycler is the Adapter name
you must to remove this item from arrayList of data
myDataset.remove(holder.getAdapterPosition());
notifyItemRemoved(holder.getAdapterPosition());
notifyItemRangeChanged(holder.getAdapterPosition(), getItemCount());
//////// set the position
holder.cancel.setTag(position);
///// click to remove an item from recycler view and an array list
holder.cancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
int positionToRemove = (int)view.getTag(); //get the position of the view to delete stored in the tag
mDataset.remove(positionToRemove);
notifyDataSetChanged();
}
});
make interface into custom adapter class and handling click event on recycler view..
onItemClickListner onItemClickListner;
public void setOnItemClickListner(CommentsAdapter.onItemClickListner onItemClickListner) {
this.onItemClickListner = onItemClickListner;
}
public interface onItemClickListner {
void onClick(Contact contact);//pass your object types.
}
#Override
public void onBindViewHolder(ItemViewHolder holder, int position) {
// below code handle click event on recycler view item.
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
onItemClickListner.onClick(mContectList.get(position));
}
});
}
after define adapter and bind into recycler view called below code..
adapter.setOnItemClickListner(new CommentsAdapter.onItemClickListner() {
#Override
public void onClick(Contact contact) {
contectList.remove(contectList.get(contectList.indexOf(contact)));
adapter.notifyDataSetChanged();
}
});
}
In case you are wondering like I did where can we get the adapter position in the method getadapterposition(); its in viewholder object.so you have to put your code like this
mdataset.remove(holder.getadapterposition());
In the activity:
mAdapter.updateAt(pos, text, completed);
mAdapter.removeAt(pos);
In the your adapter:
void removeAt(int position) {
list.remove(position);
notifyItemRemoved(position);
notifyItemRangeChanged(position, list.size());
}
void updateAt(int position, String text, Boolean completed) {
TodoEntity todoEntity = list.get(position);
todoEntity.setText(text);
todoEntity.setCompleted(completed);
notifyItemChanged(position);
}
in 2022, after trying everything the whole internet given below is the answer
In MyViewHolder class
private myAdapter adapter;
inside MyViewHolder function initalise adapter
adapter = myAdapter.this
inside onclick
int position = getAdapterPosition()
list.remove(position);
adapter.notifyItemRemoved(position);

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