Develop Reference

Why me recyclerview item automatically click?

I am working on an application where i have list of items in recyclerview on items i have a hear icon as wishlist the problem is when i click on the first item the last item automatically selected when i select the second item the second last got selected automatically. I dont know why this is happening?? please guide me
My RecyclerView Adapter
public class RecyclerviewAdapter extends RecyclerView.Adapter<RecyclerviewAdapter.Viewholder> {
ArrayList<RecyclerviewModel> datalist;
Context context;
public RecyclerviewAdapter(ArrayList<RecyclerviewModel> datalist, Context context) {
this.datalist = datalist;
this.context = context;
}
#NonNull
#Override
public Viewholder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View viewholder = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_item, parent , false);
return new Viewholder(viewholder);
}
#Override
public void onBindViewHolder(#NonNull Viewholder holder, int position)
{
holder.name.setText(datalist.get(position).getName());
holder.email.setText(datalist.get(position).getEmail());
holder.desc.setText(datalist.get(position).getDesc());
holder.book.setText(datalist.get(position).getBook());
//code for setting image-slider on home
holder.sliderAdapterExample = new SliderAdapterExample(context.getApplicationContext(), datalist.get(position).getImages());
holder.imageSlider.setSliderAdapter(holder.sliderAdapterExample);
final RecyclerviewModel datawish = datalist.get(position);
String wishName = datawish.getName();
String wishEmail = datawish.getEmail();
holder.wishlist.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
int pos = holder.getBindingAdapterPosition();
if(compoundButton.isChecked())
{
Toast.makeText(context, "item added to wishlist" + pos , Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(context, "item removed to wishlist", Toast.LENGTH_SHORT).show();
}
}
});
}
#Override
public int getItemCount() {
return datalist.size();
}
public class Viewholder extends RecyclerView.ViewHolder{
TextView name, email, desc, book;
SliderView imageSlider;
SliderAdapterExample sliderAdapterExample;
CheckBox wishlist;
public Viewholder(#NonNull View itemView) {
super(itemView);
name = itemView.findViewById(R.id.text_name);
email = itemView.findViewById(R.id.text_email);
desc = itemView.findViewById(R.id.text_desc);
book = itemView.findViewById(R.id.text_book);
wishlist = itemView.findViewById(R.id.wishlist_checkbox);
imageSlider = itemView.findViewById(R.id.imageView3);
}
}
}
i click on the first heart icon
the last one is automatically clicked

Why this happening? Because when you scroll recyclerview remove hidden items automatically. For ex: 0 will be remove when scroll down and 1 item will be 0, 2 item will be 1 and 3->2,4->3 like this. There are 2 ways fix this error:
1) Simple way, but this method freeze your app when data is big:
#Override
public void onBindViewHolder(#NonNull Viewholder holder, int position)
{
holder.setIsRecyclable(false);
}
2) If you want you use second method you must add unique_id to your arraylist each item:
public class RecyclerviewAdapter extends RecyclerView.Adapter<RecyclerviewAdapter.Viewholder> {
ArrayList<RecyclerviewModel> datalist;
Context context;
private ArrayList<String> checkedItems=new ArrayList<>();
public RecyclerviewAdapter(ArrayList<RecyclerviewModel> datalist, Context context) {
this.datalist = datalist;
this.context = context;
}
#NonNull
#Override
public Viewholder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View viewholder = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_item, parent , false);
return new Viewholder(viewholder);
}
#Override
public void onBindViewHolder(#NonNull Viewholder holder, int position)
{
int pos=holder.getAdapterPosition();
holder.name.setText(datalist.get(pos).getName());
holder.email.setText(datalist.get(pos).getEmail());
holder.desc.setText(datalist.get(pos).getDesc());
holder.book.setText(datalist.get(pos).getBook());
//code for setting image-slider on home
holder.sliderAdapterExample = new SliderAdapterExample(context.getApplicationContext(), datalist.get(pos).getImages());
holder.imageSlider.setSliderAdapter(holder.sliderAdapterExample);
final RecyclerviewModel datawish = datalist.get(pos);
String wishName = datawish.getName();
String wishEmail = datawish.getEmail();
holder.wishlist.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if(b){
checkedItems.add(datalist.get(pos).getUniqueId());
} else {
checkedItems.remove(datalist.get(pos).getUniqueId());
}
}
});
// Check your selection here
if(checkedItems.contains(datalist.get(pos).getUniqueId())){
holder.wishlist.setChecked(true);
} else {
holder.wishlist.setChecked(false);
}
}
#Override
public int getItemCount() {
return datalist.size();
}
public class Viewholder extends RecyclerView.ViewHolder{
TextView name, email, desc, book;
SliderView imageSlider;
SliderAdapterExample sliderAdapterExample;
CheckBox wishlist;
public Viewholder(#NonNull View itemView) {
super(itemView);
name = itemView.findViewById(R.id.text_name);
email = itemView.findViewById(R.id.text_email);
desc = itemView.findViewById(R.id.text_desc);
book = itemView.findViewById(R.id.text_book);
wishlist = itemView.findViewById(R.id.wishlist_checkbox);
imageSlider = itemView.findViewById(R.id.imageView3);
}
}
}

When you call your Adapter in your Fragment or Activity, add this line before setAdapter()
recyclerView.setItemViewCacheSize(mData.size());

attempting to use incompatible return type

Can someone help me with this error that I keep getting? The program that I'm trying to implement admob banner ad between items in recyclerview. every thing is ok but still this one error that blocked me from go on.
public class RecipeAdapter extends RecyclerView.Adapter<RecipeAdapter.ViewHolder> {
public static final String TAG = RecipeAdapter.class.getSimpleName();
public static final HashMap<String, Integer> LABEL_COLORS = new HashMap<String, Integer>() {{
put("Low-Carb", R.color.colorLowCarb);
put("Low-Fat", R.color.colorLowFat);
put("Low-Sodium", R.color.colorLowSodium);
put("Medium-Carb", R.color.colorMediumCarb);
put("Vegetarian", R.color.colorVegetarian);
put("Balanced", R.color.colorBalanced);
}};
private Context mContext;
private LayoutInflater mInflater;
private ArrayList<Recipe> mDataSource;
private static final int DEFAULT_VIEW_TYPE = 1;
private static final int NATIVE_AD_VIEW_TYPE = 2;
public RecipeAdapter(Context context, ArrayList<Recipe> items) {
mContext = context;
mDataSource = items;
mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); }
#Override public int getItemViewType(int position) {
// Change the position of the ad displayed here. Current is after 5
if ((position + 1) % 6 == 0) {
return NATIVE_AD_VIEW_TYPE;
}
return DEFAULT_VIEW_TYPE; }
#NonNull
#Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view;
LayoutInflater layoutInflater = LayoutInflater.from(mContext);
switch (viewType) {
default:
view = layoutInflater
.inflate(R.layout.list_item_native_ad, parent, false);
return new ViewHolder(view);
case NATIVE_AD_VIEW_TYPE:
view = layoutInflater.inflate(R.layout.list_item_native_ad, parent, false);
return new ViewHolderAdMob(view);
}
}
#Override public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
// Get relevant subviews of row view
TextView titleTextView = holder.titleTextView;
TextView subtitleTextView = holder.subtitleTextView;
TextView detailTextView = holder.detailTextView;
ImageView thumbnailImageView = holder.thumbnailImageView;
//Get corresponding recipe for row final Recipe recipe = (Recipe) getItem(position);
// Update row view's textviews to display recipe information
titleTextView.setText(recipe.title);
subtitleTextView.setText(recipe.description);
detailTextView.setText(recipe.label);
// Use Picasso to load the image. Temporarily have a placeholder in case it's slow to load
Picasso.with(mContext).load(recipe.imageUrl).placeholder(R.mipmap
.ic_launcher).into(thumbnailImageView);
holder.parentView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent detailIntent = new Intent(mContext, RecipeDetailActivity.class);
detailIntent.putExtra("title", recipe.title);
detailIntent.putExtra("url", recipe.instructionUrl);
mContext.startActivity(detailIntent);
}
});
// Style text views
Typeface titleTypeFace = Typeface.createFromAsset(mContext.getAssets(),
"fonts/JosefinSans-Bold.ttf");
titleTextView.setTypeface(titleTypeFace);
Typeface subtitleTypeFace = Typeface.createFromAsset(mContext.getAssets(),
"fonts/JosefinSans-SemiBoldItalic.ttf");
subtitleTextView.setTypeface(subtitleTypeFace);
Typeface detailTypeFace = Typeface.createFromAsset(mContext.getAssets(),
"fonts/Quicksand-Bold.otf");
detailTextView.setTypeface(detailTypeFace);
detailTextView.setTextColor(android.support.v4.content.ContextCompat.getColor(mContext, LABEL_COLORS
.get(recipe.label)));
}
#Override public int getItemCount() {
return mDataSource.size(); }
#Override public long getItemId(int position) {
return position; }
public Object getItem(int position) {
return mDataSource.get(position); }
public class ViewHolder extends RecyclerView.ViewHolder {
private TextView titleTextView;
private TextView subtitleTextView;
private TextView detailTextView;
private ImageView thumbnailImageView; private View parentView;
public ViewHolder(#NonNull View view){
super(view);
// create a new "Holder" with subviews
this.parentView = view;
this.thumbnailImageView = (ImageView) view.findViewById(R.id.recipe_list_thumbnail);
this.titleTextView = (TextView) view.findViewById(R.id.recipe_list_title);
this.subtitleTextView = (TextView) view.findViewById(R.id.recipe_list_subtitle);
this.detailTextView = (TextView) view.findViewById(R.id.recipe_list_detail);
// hang onto this holder for future recyclage
view.setTag(this);
}
}
public class ViewHolderAdMob extends RecyclerView.ViewHolder {
private final AdView mNativeAd;
public ViewHolderAdMob(View itemView) {
super(itemView);
mNativeAd = itemView.findViewById(R.id.nativeAd);
mNativeAd.setAdListener(new AdListener() {
#Override
public void onAdLoaded() {
super.onAdLoaded();
// if (mItemClickListener != null) {
Log.i("AndroidBash", "onAdLoaded");
// }
}
#Override
public void onAdClosed() {
super.onAdClosed();
// if (mItemClickListener != null) {
Log.i("AndroidBash", "onAdClosed");
// }
}
#Override
public void onAdFailedToLoad(int errorCode) {
super.onAdFailedToLoad(errorCode);
// if (mItemClickListener != null) {
Log.i("AndroidBash", "onAdFailedToLoad");
// }
}
#Override
public void onAdLeftApplication() {
super.onAdLeftApplication();
// if (mItemClickListener != null) {
Log.i("AndroidBash", "onAdLeftApplication");
// }
}
#Override
public void onAdOpened() {
super.onAdOpened();
// if (mItemClickListener != null) {
Log.i("AndroidBash", "onAdOpened");
// }
}
});
AdRequest adRequest = new AdRequest.Builder()
.addTestDevice("") // Remove this before publishing app
.build();
mNativeAd.loadAd(adRequest);
}
}
}

The return type needs to be whatever ViewHolder type you declared for your adapter class.
For example, from the Android RecyclerView example page:
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
// ^^^^^^^^^^^^^^^^^^^^^^
// It should return this type ^
public static class MyViewHolder extends RecyclerView.ViewHolder {
// your adapter
}
#Override
public MyAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
// Note: returns MyAdapter.MyViewHolder, not RecyclerView.ViewHolder
}
}
In your case, you have
public class RecipeAdapter extends RecyclerView.Adapter<RecipeAdapter.ViewHolder>
which means your onCreateViewHolder has to return RecipeAdapter.ViewHolder not RecyclerView.ViewHolder.
There is a separate issue too, which is that you have two ViewHolder types in the same adapter. To do this, you would need to change the ViewHolder type that your RecyclerView is based on to the generic type (RecyclerView.ViewHolder).
Please review this question, it has good answers for how to do this.

How to make one view bigger than the other views in RecyclerView?

I have few images in the json API, and I managed to fetch those images using volley Library. I used recyclerview with an image adapter to display image views vertically in two columns, but I want to make one image big and display it as the first image that user can click on. Also that image will be changed each interval of time. Basically, the API will do all the backend task like setting the time and telling which image to be displayed on the top of the recyclerview if not all images must have the same size and be shown in 2 columns vertically.
I have square layout class for recyclerview. I just want to know how I can do this. Even the concept will be fine.

you will have to create two view one for small item other for the header item and in onBindViewHolder have to bind those accordingly the following code is an example of a news article app and should help.
public class AdapterNewsArticlesListWithHeader extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private List<NewsArticles> items = new ArrayList<>();
private Context ctx;
private NewsArticles header;
private static final int TYPE_HEADER = 0;
private static final int TYPE_ITEM = 1;
private OnItemClickListener mOnItemClickListener;
public interface OnItemClickListener {
void onItemClick(View view, NewsArticles obj, int position);
}
public void setOnItemClickListener(final OnItemClickListener mItemClickListener) {
this.mOnItemClickListener = mItemClickListener;
}
// Provide a suitable constructor (depends on the kind of dataset)
public AdapterNewsArticlesListWithHeader(Context context, NewsArticles header, List<NewsArticles> items) {
this.items = items;
this.header = header;
ctx = context;
}
public class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public TextView title;
public TextView short_content;
public TextView date;
public ImageView image;
public LinearLayout lyt_parent;
public ViewHolder(View v) {
super(v);
title = (TextView) v.findViewById(R.id.title);
short_content = (TextView) v.findViewById(R.id.short_content);
date = (TextView) v.findViewById(R.id.date);
image = (ImageView) v.findViewById(R.id.image);
lyt_parent = (LinearLayout) v.findViewById(R.id.lyt_parent);
}
}
class ViewHolderHeader extends RecyclerView.ViewHolder {
public TextView title;
public TextView date;
public ImageView image;
public LinearLayout lyt_parent;
public ViewHolderHeader(View v) {
super(v);
title = (TextView) v.findViewById(R.id.title);
date = (TextView) v.findViewById(R.id.date);
image = (ImageView) v.findViewById(R.id.image);
lyt_parent = (LinearLayout) v.findViewById(R.id.lyt_parent);
}
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TYPE_HEADER) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_header, parent, false);
return new ViewHolderHeader(v);
} else if (viewType == TYPE_ITEM) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_news, parent, false);
return new ViewHolder(v);
}
return null;
}
// Replace the contents of a view (invoked by the layout manager)
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
if (holder instanceof ViewHolderHeader) {
ViewHolderHeader vHeader = (ViewHolderHeader) holder;
vHeader.title.setText(header.getTitle());
vHeader.date.setText(header.getDate());
Picasso.with(ctx).load(header.getImage()).into(vHeader.image);
vHeader.lyt_parent.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//TODO: do your thing
}
});
} else if (holder instanceof ViewHolder) {
final NewsArticles c = items.get(position);
ViewHolder vItem = (ViewHolder) holder;
vItem.title.setText(c.getTitle());
vItem.short_content.setText(c.getShort_content());
vItem.date.setText(c.getDate());
Picasso.with(ctx).load(c.getImage()).into(vItem.image);
vItem.lyt_parent.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//TODO: do your thing
}
});
}
}
// need to override this method
#Override
public int getItemViewType(int position) {
if (isPositionHeader(position)) {
return TYPE_HEADER;
}
return TYPE_ITEM;
}
private boolean isPositionHeader(int position) {
return position == 0;
}
public NewsArticles getItem(int position) {
return items.get(position);
}
// Return the size of your dataset (invoked by the layout manager)
#Override
public int getItemCount() {
return items.size();
}
}

change the position of two view (Text view ) using Drag And Drop functionality

i want change the position of Text View using drag and drop functionally in android using Drag listener and animation. i am done a design using following code. i want to change the order of text view using Drag Listener. thanks i give a image of design and i want change position of text view using drag and drop
public void loadtable()
{
Sorting_Linear = (LinearLayout) findViewById(R.id.Sorting_Linear);
submit = (Button) findViewById(R.id.submit);
LinearLayout[] llRow = new LinearLayout[5];
final TextView[] outletnametxt = new TextView[5];
final ImageView[] imageButtonup = new ImageView[5];
final ImageView[] imageButtondown = new ImageView[5];
final LinearLayout[] Linearlayout = new LinearLayout[5];
for (int i = 0; i < 5; i++) {
llRow[i] = new LinearLayout(mContext);
LinearLayout.LayoutParams paramsllRow = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
paramsllRow.setMargins(0, 2, 0, 0);
llRow[i].setLayoutParams(paramsllRow);
llRow[i].setOrientation(LinearLayout.HORIZONTAL);
outletnametxt[i] = new TextView(mContext);
outletnametxt[i].setLayoutParams(nametxt);
outletnametxt[i].setText(olm_name[i]);
outletnametxt[i].setTextAlignment(View.TEXT_ALIGNMENT_CENTER);
outletnametxt[i].setTextSize(20);
outletnametxt[i].setGravity(Gravity.CENTER);
outletnametxt[i].setBackgroundColor(mContext.getResources().getColor(android.R.color.white));
llRow[i].addView(outletnametxt[i]);
imageButtonup[i] = new ImageView(mContext);
imageButtonup[i].setLayoutParams(imagebtnup);
imageButtonup[i].setImageResource(R.drawable.arrowup);
imageButtondown[i] = new ImageView(mContext);
imageButtondown[i].setLayoutParams(imagebtndown);
imageButtondown[i].setImageResource(R.drawable.arrowdown);
Linearlayout[i] = new LinearLayout(mContext);
Linearlayout[i].setLayoutParams(linearlayout);
Linearlayout[i].setTextAlignment(View.TEXT_ALIGNMENT_CENTER);
Linearlayout[i].setBackgroundColor(mContext.getResources().getColor(android.R.color.white));
Linearlayout[i].setOrientation(LinearLayout.VERTICAL);
Linearlayout[i].addView(imageButtonup[i]);
Linearlayout[i].addView(imageButtondown[i]);
llRow[i].addView(Linearlayout[i]);
Sorting_Linear.addView(llRow[i]);
}

Create below interface ItemTouchHelperAdapter
public interface ItemTouchHelperAdapter {
boolean onItemMove(int fromPosition, int toPosition);
void onItemDismiss(int position);}
Create second interface ItemTouchHelperViewHolder
public interface ItemTouchHelperViewHolder {
void onItemSelected();
void onItemClear();}
Create OnStartDragListener
public interface OnStartDragListener {
void onStartDrag(RecyclerView.ViewHolder viewHolder);}
Create below class
public class SimpleItemTouchHelperCallback extends ItemTouchHelper.Callback {
public static final float ALPHA_FULL = 1.0f;
private final ItemTouchHelperAdapter mAdapter;
public SimpleItemTouchHelperCallback(ItemTouchHelperAdapter adapter) {
mAdapter = adapter;
}
#Override
public boolean isLongPressDragEnabled() {
return true;
}
#Override
public boolean isItemViewSwipeEnabled() {
return true;
}
#Override
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
// Set movement flags based on the layout manager
if (recyclerView.getLayoutManager() instanceof GridLayoutManager) {
final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
final int swipeFlags = 0;
return makeMovementFlags(dragFlags, swipeFlags);
} else {
final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
final int swipeFlags = 0;
return makeMovementFlags(dragFlags, swipeFlags);
}
}
#Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder source, RecyclerView.ViewHolder target) {
if (source.getItemViewType() != target.getItemViewType()) {
return false;
}
// Notify the adapter of the move
mAdapter.onItemMove(source.getAdapterPosition(), target.getAdapterPosition());
return true;
}
#Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int i) {
// Notify the adapter of the dismissal
mAdapter.onItemDismiss(viewHolder.getAdapterPosition());
}
#Override
public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {
// Fade out the view as it is swiped out of the parent's bounds
final float alpha = ALPHA_FULL - Math.abs(dX) / (float) viewHolder.itemView.getWidth();
viewHolder.itemView.setAlpha(alpha);
viewHolder.itemView.setTranslationX(dX);
} else {
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
}
#Override
public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {
// We only want the active item to change
if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {
if (viewHolder instanceof ItemTouchHelperViewHolder) {
// Let the view holder know that this item is being moved or dragged
ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder;
itemViewHolder.onItemSelected();
}
}
super.onSelectedChanged(viewHolder, actionState);
}
#Override
public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
super.clearView(recyclerView, viewHolder);
viewHolder.itemView.setAlpha(ALPHA_FULL);
if (viewHolder instanceof ItemTouchHelperViewHolder) {
// Tell the view holder it's time to restore the idle state
ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder;
itemViewHolder.onItemClear();
}
}}
Now just add this code to your recycler view adapter
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new RecyclerListAdapter(Activity_OutletSorting.this, onStartDragListener, olm_name,idopeningclosing);
recyclerView.setAdapter(adapter);
ItemTouchHelper.Callback callback = new SimpleItemTouchHelperCallback(adapter);
mItemTouchHelper = new ItemTouchHelper(callback);
mItemTouchHelper.attachToRecyclerView(recyclerView);

Android: set fixed item on RecyclerView

I have a RecyclerView, when I click in the first view it adds another view like in the image, what I want is to set the "add" view which ID is "1" to be fixed in the last position of the recycler instead in the first.
My adapter:
public class AddEventsAdapter extends RecyclerView.Adapter<AddEventsAdapter.ViewHolder> {
private List<String> items = new ArrayList<>();
public void addItem(String name) {
items.add(name);
notifyItemInserted(items.size() - 1);
}
public void removeItem(int position) {
items.remove(position);
notifyItemRemoved(position);
notifyItemRangeChanged(position, items.size());
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View view = inflater.inflate(R.layout.add_event_item, parent, false);
return new ViewHolder(view);
}
#Override
public int getItemCount() {
return items.size();
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.setEventNameName(i + "");
if(position == 0)
{
holder.theLayout.setBackgroundColor(Color.parseColor("#7F9099"));
holder.eventName.setText("Add");
}
}
static int i;
class ViewHolder extends RecyclerView.ViewHolder{
public TextView eventName;
public RelativeLayout theLayout;
public ViewHolder(final View itemView) {
super(itemView);
eventName = (TextView)itemView.findViewById(R.id.eventName);
theLayout = (RelativeLayout)itemView.findViewById(R.id.backgroundevent);
theLayout.setId(++i);
theLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (getAdapterPosition()>0){
removeItem(getAdapterPosition());
}else {
addItem("");
}
}
});
}
public void setEventNameName(String TheEventName){
eventName.setText(TheEventName);
}
}
}
In the activity:
final AddEventsAdapter AddContainer = new AddEventsAdapter();
AddEventsRecycler.setLayoutManager(new LinearLayoutManager(this));
AddEventsRecycler.setAdapter(AddContainer);
AddEventsRecycler.setItemViewCacheSize(666);
RecyclerView.ItemAnimator itemAnimator = new DefaultItemAnimator();
itemAnimator.setAddDuration(1000);
itemAnimator.setRemoveDuration(1000);
AddEventsRecycler.setItemAnimator(itemAnimator);
AddContainer.addItem("");

I solved it by creating a custom adapter that allows a footer and a header, here is the project in GitHub: https://github.com/u3breeze/android-RecyclerView-WithHeaderAndFooter

Did you try something like:
public void addItem(String name) {
if (items.size() != 0) {
removeItem(items.size() - 1);
items.add(name);
items.add("Add");
} else
items.add("Add");
notifyItemInserted(items.size() - 1);
}
then id of Add item is items.size() -1
edit:
Change if in your Holder class with following code:
if(position == items.size() - 1)
{
holder.theLayout.setBackgroundColor(Color.parseColor("#7F9099"));
holder.eventName.setText("Add");
}