Create Base Adapters For All Recycler View Adapters

Create Base Adapters For All Recycler View Adapters - java

public abstract class BaseAdapters extends RecyclerView.Adapter<BaseAdapters.MyViewHolder> implements View.OnClickListener {
protected Context parentContext;
public int layout_id;
protected List<?> dataList = new ArrayList<>();
public class MyViewHolder extends RecyclerView.ViewHolder {
MyViewHolder(View view) {
super(view);
declareViews(view,this);
}
}
#Override
public void onClick(View view) {
onClickViews(view);
}
#Override
public int getItemViewType(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public void onBindViewHolder(#NonNull MyViewHolder holder, int i) {
bindView(holder, i);
}
public void notifyList(List<?> filterdNames) {
this.dataList = filterdNames;
notifyDataSetChanged();
}
#Override
public int getItemCount() {
if (dataList.size() == 0)
return 5;
else
return dataList.size();
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int i) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(layout_id, parent, false);
return new MyViewHolder(itemView);
}
public abstract MyViewHolder bindView(MyViewHolder holder, int position);
public abstract void onClickViews(View view);
public abstract void declareViews(View view,MyViewHolder holder);
}
How can i perform on click of every item selection using holder in child class extending with it.

import android.app.Activity;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
public abstract class BaseAdapter extends RecyclerView.Adapter<BaseAdapter.MyViewHolder> {
public int layout_id;
protected List<?> dataList = new ArrayList<>();
Context BASE_CONTEXT;
public View itemview;
public BaseAdapter(Context context) {
this.BASE_CONTEXT = context;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(layout_id, viewGroup, false);
return new MyViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull MyViewHolder viewHolder, int position) {
onBindViewHold(position, dataList.get(position));
}
public abstract View getView(View view);
#Override
public int getItemCount() {
return dataList.size() == 0 ? 0 : dataList.size();
}
public abstract void onBindViewHold(int position, Object itemView);
class MyViewHolder extends RecyclerView.ViewHolder {
public MyViewHolder(#NonNull View itemView) {
super(itemView);
itemview = itemView;
getView(itemView);
}
}
public <T extends View> T bind(int id) {
return itemview.findViewById(id);
}
}
public class Adapter extends BaseAdapter {
TextView tv;
Adapter(Context context, ArrayList<String> arrayList){
super(context);
dataList=arrayList;
layout_id=R.layout.content_main2;
}
#Override
public View getView(View view) {
tv = bind(R.id.tv);
return view;
}
#Override
public void onBindViewHold( final int position, Object itemView) {
String text=(String) itemView;
Log.e("tv",tv.toString());
tv.setText(text);
tv.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(BASE_CONTEXT, ""+position, Toast.LENGTH_SHORT).show();
}
});
}
}

You can refer this sample adapter class and edit it as per your requirement:
public class absadapter extends RecyclerView.Adapter<absadapter.exViewHolder> {
List<abs.Ex> exList;
Context context;
absadapter(List exList) {
this.exList= exList;
}
public static class exViewHolder extends RecyclerView.ViewHolder{
CardView cardView;
TextView exname;
ImageView exlogo;
exViewHolder(View itemView){
super(itemView);
cardView= itemView.findViewById(R.id.cardView);
exname= itemView.findViewById(R.id.ex_name);
exlogo=itemView.findViewById(R.id.exlogo);
}
}
#Override
public absadapter.exViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
View viewthigh= LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_abslayout,parent,false);
absadapter.exViewHolder evh=new absadapter.exViewHolder(viewthigh);
return evh;
}
#Override
public void onBindViewHolder(final absadapter.exViewHolder holder, final int position){
holder.exname.setText(exList.get(position).name);
holder.exlogo.setImageResource(exList.get(position).logoId);
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (position == 0 ){
v.getContext().startActivity(new Intent(v.getContext(), abdetails.class));
}
if (position == 1) {
v.getContext().startActivity(new Intent(v.getContext(), declinecrunch.class));
}
if (position == 2) {
v.getContext().startActivity(new Intent(v.getContext(), dumsidebend.class));
}
}
});
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView){
super.onAttachedToRecyclerView(recyclerView);
}
#Override
public int getItemCount() {
return exList.size();
}
Refer this for Main Class:
public class abs extends AppCompatActivity {
RecyclerView recyclerView;
Context context;
private List<Ex> exlist;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_abs);
recyclerView= findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
LinearLayoutManager layoutManager=new LinearLayoutManager(context);
recyclerView.setLayoutManager(layoutManager);
initializeData();
initializeAdapter();
}
private void initializeData(){
exlist=new ArrayList<>();
exlist.add(new abs.Ex("Crunches",R.drawable.crunchesgif));
exlist.add(new abs.Ex("Decline Crunch",R.drawable.declinecrunch));
exlist.add(new abs.Ex("Dumbell Side Bends",R.drawable.dumbbellsidebend));
exlist.add(new abs.Ex("Hanging Leg Raises",R.drawable.hanginglegraises));
exlist.add(new abs.Ex("Incline Leg Raises",R.drawable.inclinelegraises));
exlist.add(new abs.Ex("Kneeling Cable Crunch",R.drawable.cablecrunch));
exlist.add(new abs.Ex("Legs Raises",R.drawable.legraises));
exlist.add(new abs.Ex("Flat Bench Lying Leg Raises",R.drawable.flatbenchlyinglegraise));
exlist.add(new abs.Ex("Seated Jack Knife",R.drawable.seatedjackknife));
exlist.add(new abs.Ex("Twisting Hip Raise",R.drawable.twistinghipraise));
exlist.add(new abs.Ex("Weighted Crunch",R.drawable.weightedcrunch));
exlist.add(new abs.Ex("Plank",R.drawable.plank));
exlist.add(new abs.Ex("Side Plank",R.drawable.sideplank));
exlist.add(new abs.Ex("Superman",R.drawable.superman));
exlist.add(new abs.Ex("Twist Crunch",R.drawable.twistcrunch));
}
public void initializeAdapter(){
absadapter rvadapter=new absadapter(exlist);
recyclerView.setAdapter(rvadapter);
}
class Ex{
String name;
int logoId;
Ex(String name,int logoId){
this.name=name;
this.logoId=logoId;
}
}

This is extend version of rupali answer, i found recycle issue on recycle-view viewholder while scrolling on items. so if needed you can use below one,
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
public abstract class BaseRecyclerViewAdapter extends RecyclerView.Adapter<BaseRecyclerViewAdapter.BaseViewHolder> {
public int layout_id;
protected List<?> dataList = new ArrayList<>();
protected BaseActivity Context;
public BaseRecyclerViewAdapter(BaseActivity context) {
this.Context = context;
}
#NonNull
#Override
public BaseViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(layout_id, viewGroup, false);
return new BaseViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull BaseViewHolder viewHolder, int position) {
onViewHolderBind(viewHolder,position, dataList.get(position));
}
#Override
public int getItemCount() {
return dataList.size();
}
public abstract void onViewHolderBind(BaseViewHolder viewHolder, int position, Object data);
public class BaseViewHolder extends RecyclerView.ViewHolder {
public BaseViewHolder(#NonNull View itemView) {
super(itemView);
}
}
}
Uses
public class LicenseListAdapter extends BaseRecyclerViewAdapter {
public LicenseListAdapter(BaseActivity appLicensePlanActivity, List<LicenseRatePlanResponse> licenseRatePlanResponseData) {
super(appLicensePlanActivity);
dataList = licenseRatePlanResponseData;
layout_id = R.layout.item_list_license_plan;
}
#Override
public void onViewHolderBind(BaseViewHolder viewHolder, int position, Object data) {
Button btnBuyButtonOfLicencePlaneILLP;
TextView lblAmountOfLicencePlaneILLP, lblDayOfLicencePlaneILLP;
lblAmountOfLicencePlaneILLP = viewHolder.itemView.findViewById(R.id.lblAmountOfLicencePlaneILLP);
lblDayOfLicencePlaneILLP = viewHolder.itemView.findViewById(R.id.lblDayOfLicencePlaneILLP);
btnBuyButtonOfLicencePlaneILLP = viewHolder.itemView.findViewById(R.id.btnBuyButtonOfLicencePlaneILLP);
final LicenseRatePlanResponse tempLicensePlan = (LicenseRatePlanResponse) data;
lblAmountOfLicencePlaneILLP.setText(KSUtility.GetFloatWithOutPrecesion(tempLicensePlan.getAmount()).toString() +" only");
lblDayOfLicencePlaneILLP.setText(tempLicensePlan.getValidityDays().toString() +" days");
btnBuyButtonOfLicencePlaneILLP.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
PaymentHelper.OpenPaymentDialog(Context, TransactionType.LicenseRenew, tempLicensePlan.getAmount(),tempLicensePlan.getLicenseRatePlanId());
}
});
}
}

overriding the method which handles click events in sub-classes of "BaseAdapters" should do it( based on your comments on other posts i assume bindView() handles click events; override whichever method you know handles click events):
class new_adapter extends BaseAdapters{
//...
#Override
public MyViewHolder bindView(MyViewHolder holder, int position){
//you could alter how click events are handled here.
}
//...
}

There can be many ways, one of them is, you can use Java Generics.
Set click in your onCreateViewHolder, set click and pass your list item of clicked row, or anything you need. You can customize method onClickViews if you need position or anyother field.
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int position) {
..
itemView.setOnClickListener(v -> onClickViews(itemView, dataList.get(position)));
..
}
and
public abstract void onClickViews(View view, T object);
Use like
public class SampleAdapter extends BaseAdapters<Item> {
#Override
public int getRowLayout() {
return R.layout.row;
}
#Override
public void onClickViews(View view, Item object) {
// row clicked
}
}
I edited your class a bit.
public abstract class BaseAdapters<T> extends RecyclerView.Adapter<BaseAdapters.MyViewHolder> {
protected List<T> dataList = new ArrayList<>();
public class MyViewHolder extends RecyclerView.ViewHolder {
MyViewHolder(View view) {
super(view);
declareViews(view, this);
}
}
#Override
public void onBindViewHolder(#NonNull MyViewHolder holder, int i) {
bindView(holder, i);
}
public void notifyList(List<T> filteredNames) {
dataList = filteredNames;
notifyDataSetChanged();
}
#Override
public int getItemCount() {
return dataList.size();
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int position) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(getRowLayout(), parent, false);
itemView.setOnClickListener(v -> onClickViews(itemView, dataList.get(position)));
return new MyViewHolder(itemView);
}
public abstract #LayoutRes
int getRowLayout();
public abstract MyViewHolder bindView(MyViewHolder holder, int position);
public abstract void onClickViews(View view, T object);
public abstract void declareViews(View view, MyViewHolder holder);
}

The Base Recycler Adapter will be like this
public class BaseRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final int BOTTOM_VIEW_TYPE = 3;
private List<Object> listModels;
private Context mContext;
private OnItemClickListener onClickListener = null;
public BaseRecyclerViewAdapter(Context context) {
this.mContext = context;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view;
switch (viewType) {
case BOTTOM_VIEW_TYPE:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.rv_bottomview_type, parent, false);
return new ChildViewHolder(view);
}
return null;
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
final Object model = listModels.get(position);
if (model != null && model.getId() > 0) {
((BaseViewHolder) holder).bind(model, position);
} else if (model != null) {
((TopViewViewHolder) holder).bind(model, position);
}
}
#Override
public int getItemViewType(int position) {
if (listModels.get(position).getId() > 0) {
return BASE_VIEW_TYPE;
} else {
return TOP_VIEW_TYPE;
}
}
#Override
public int getItemCount() {
return null == listModels ? 0 : listModels.size();
}
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
this.onClickListener = onItemClickListener;
}
private class ChildViewHolder extends RecyclerView.ViewHolder {
TextView tv_bottomName;
BottomViewHolder(View v) {
super(v);
tv_bottomName = v.findViewById(R.id.tv_bottomName);
}
void bind(Object object, final int position) {
tv_bottomName.setOnClickListener(view -> onClickListener.onItemClick(object, tv_bottomName, position));
}
}
}
And use a Custom interface for OnItemClickListner
public interface OnItemClickListener {
void onItemClick(Object object, View view, int position);}
And Implement the listner in activity or fragment

Related

How to take value from dynamic edit text in Adapter

I have a RecyclerView with one edit text in Adapter where the editText is dynamic based on object present inside the array, How can i take the value of each edittext ?
public class AdapterFastagEditList extends RecyclerView.Adapter<AdapterFastagEditList.ViewHolder> {
Activity activity;
List<JSONObject> list;
OnItemViewClickListener onItemViewClickListener;
public AdapterFastagEditList(Activity activity, List<JSONObject> list, OnItemViewClickListener onItemViewClickListener) {
this.activity = activity;
this.list = list;
this.onItemViewClickListener = onItemViewClickListener;
}
public void setOnItemViewClickListener(OnItemViewClickListener onItemViewClickListener) {
this.onItemViewClickListener = onItemViewClickListener;
}
#NonNull
#Override
public AdapterFastagEditList.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
// Initialize view for recyclerview
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
AdapterDynamicEdittextFastagBinding binding = AdapterDynamicEdittextFastagBinding.inflate(inflater, parent, false);
return new ViewHolder(binding.getRoot(), binding);
}
JSONObject object = new JSONObject();
#Override
public void onBindViewHolder(#NonNull AdapterFastagEditList.ViewHolder holder, int position) {
object = list.get(position);
AdapterDynamicEdittextFastagBinding binding = holder.binding;
try {
binding.TextInputContent.setHint(object.getString("BdetailsFieldName"));
binding.EditTextContent.setId(View.generateViewId());
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public int getItemCount() {
return list.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
AdapterDynamicEdittextFastagBinding binding;
public ViewHolder(#NonNull View itemView, AdapterDynamicEdittextFastagBinding binding) {
super(itemView);
this.binding = binding;
}
}
}

public class ViewHolder extends RecyclerView.ViewHolder {
AdapterDynamicEdittextFastagBinding binding;
public ViewHolder(#NonNull View itemView, AdapterDynamicEdittextFastagBinding binding) {
super(itemView);
this.binding = binding;
binding.yourEdittext.addTextChangedListener(new TextWatcher() {
#Override
public void afterTextChanged(Editable s) {}
#Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
//s.toString() gives you changes
//getAdapterPosition() also gives you changed item index
}
});
}
}

How to pass information from one adapter to other?

i have two adapters one for my card view and the other one for my drawer. The cards contains links to other options in the app and the drawer contains the same options. What i want is when user clicks on the card, the options in the drawer menu should get selected. Here is my code.
Drawer Adapter:
#SuppressWarnings({"rawtypes", "ConstantConditions"})
public class DrawerAdapter extends RecyclerView.Adapter<DrawerAdapter.ViewHolder> {
private List<DrawerItem> items;
private Map<Class<? extends DrawerItem>, Integer> viewTypes;
private SparseArray<DrawerItem> holderFactories;
private OnItemSelectedListener listener;
public DrawerAdapter(List<DrawerItem> items) {
this.items = items;
this.viewTypes = new HashMap<>();
this.holderFactories = new SparseArray<>();
processViewTypes();
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
ViewHolder holder = holderFactories.get(viewType).createViewHolder(parent);
holder.adapter = this;
return holder;
}
#Override
#SuppressWarnings("unchecked")
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
items.get(position).bindViewHolder(holder);
}
#Override
public int getItemCount() {
return items.size();
}
#Override
public int getItemViewType(int position) {
return viewTypes.get(items.get(position).getClass());
}
private void processViewTypes() {
int type = 0;
for (DrawerItem item : items) {
if (!viewTypes.containsKey(item.getClass())) {
viewTypes.put(item.getClass(), type);
holderFactories.put(type, item);
type++;
}
}
}
public void setSelected(int position) {
DrawerItem newChecked = items.get(position);
if (!newChecked.isSelectable()) {
return;
}
for (int i = 0; i < items.size(); i++) {
DrawerItem item = items.get(i);
if (item.isChecked()) {
item.setChecked(false);
notifyItemChanged(i);
break;
}
}
newChecked.setChecked(true);
notifyItemChanged(position);
if (listener != null) {
listener.onItemSelected(position);
}
}
public void setListener(OnItemSelectedListener listener) {
this.listener = listener;
}
static abstract class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private DrawerAdapter adapter;
public ViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
adapter.setSelected(getAdapterPosition());
}
}
public interface OnItemSelectedListener {
void onItemSelected(int position);
}
}
Card Adapter:
public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> {
;
private RecyclerView parentRecycler;
private List<Card> data;
public CardAdapter(List<Card> data) {
this.data = data;
}
#Override
public void onAttachedToRecyclerView(#NonNull RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
parentRecycler = recyclerView;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View v = inflater.inflate(R.layout.item_card, parent, false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
Card card = data.get(position);
holder.getAdapterPosition();
Glide.with(holder.itemView.getContext())
.asGif()
.load(card.getCardIcon())
.into(holder.gifImageView);
holder.textView.setText(card.getCardName());
}
#Override
public int getItemCount() {
return data.size();
}
class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private GifImageView gifImageView;
private TextView textView;
public ViewHolder(View itemView) {
super(itemView);
gifImageView = itemView.findViewById(R.id.card_gif);
textView = itemView.findViewById(R.id.card_name);
itemView.findViewById(R.id.container).setOnClickListener(this);
}
public void showText() {
int parentHeight = ((View) gifImageView.getParent()).getHeight();
float scale = (parentHeight - textView.getHeight()) / (float) gifImageView.getHeight();
gifImageView.setPivotX(gifImageView.getWidth() * 0.5f);
gifImageView.setPivotY(0);
gifImageView.animate().scaleX(scale)
.withEndAction(new Runnable() {
#Override
public void run() {
textView.setVisibility(View.VISIBLE);
// gifImageView.setColorFilter(Color.BLACK);
}
})
.scaleY(scale).setDuration(200)
.start();
}
public void hideText() {
textView.setVisibility(View.INVISIBLE);
gifImageView.animate().scaleX(1f).scaleY(1f)
.setDuration(200)
.start();
}
#Override
public void onClick(View v) { parentRecycler.smoothScrollToPosition(getAdapterPosition());
}
}
}
}
P.S: I am new to programming any kind of help is appreciated.[As you can see in the image below that I have cards in the main view and the same options are in the drawer menu for example question papers. Now when the user clicks on question paper in the main view the question paper in drawer menu should get selected.[][1]][1]
thank you!
[1]: https://i.stack.imgur.com/FooVb.jpg

Change RecyclerView Selected Item background

i have a list and i showed that in recycler view
some of items have blue background and other items have gray background
i want to edit selected item background (
The selected item means the item that has been clicked )
this is my adapter class
public class UserAdapter extends RecyclerView.Adapter<UserAdapter.UserViewHolder> {
private Context context;
private List<User> users = new ArrayList<>();
public UserAdapter(List<User> users, Context context) {
this.users = users;
this.context = context;
}
#NonNull
#Override
public UserViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
return new UserViewHolder(LayoutInflater.from(context).inflate(R.layout.item_user, parent, false));
}
#Override
public void onBindViewHolder(#NonNull UserViewHolder holder, int position) {
holder.binUser(users.get(position), position);
}
#Override
public int getItemCount() {
return users.size();
}
public class UserViewHolder extends RecyclerView.ViewHolder {
private TextView tvName;
private RelativeLayout rlItemUser;
public UserViewHolder(#NonNull View itemView) {
super(itemView);
tvName = itemView.findViewById(R.id.tv_itemUser_name);
rlItemUser = itemView.findViewById(R.id.itemUser_rootView);
}
public void binUser(User user, int position){
tvName.setText(user.getName());
if (user.getMode().equals("passenger")){
rlItemUser.setBackgroundColor(context.getResources().getColor(R.color.colorGray));
tvName.setTextColor(context.getResources().getColor(R.color.colorPrimary));
} else if (user.getMode().equals("driver")){
rlItemUser.setBackgroundColor(context.getResources().getColor(R.color.colorPrimary));
tvName.setTextColor(context.getResources().getColor(R.color.colorGray));
}
}
}

in the bindUser method:
rlItemUser.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
rtlItemUser.setBackgroundColor(context.getResources().getColor(your color);
adapter.notifyItemChanged(position);
}
});

How to Highlighted single Text and background color when using recycle view

I'll use RecyclerView And I've more than 10 items in the list And I Have to change a text color and background layout on a single click of the item and else all the item color not change. Please suggest me the right way to solve this issue. I'll try to change the color in BindViewHolder, ViewHolder and Adapter click item but I'm Successful to change the color but unsuccessful to change the color back.
public class LoadVehicleTypeAdapter extends RecyclerView.Adapter<LoadVehicleTypeAdapter.CarTypesHolder> {
private List<TaxiTypeResponse.Message> CarTypesModelsList;
private Context mContext;
VehicleTypeView vehicleTypeView;
setOnitemclick listener;
private SparseBooleanArray selectedItems = new SparseBooleanArray();
int I=-1;
public class CarTypesHolder extends RecyclerView.ViewHolder {
public CustomTextView mCarType;
public CircleImageView mCarTypeImage;
LinearLayout llRoot;
CardView cardView;
private SparseBooleanArray selectedItems = new SparseBooleanArray();
setOnitemclick listener;
public CarTypesHolder(final View view) {
super(view);
mCarType = (CustomTextView) view.findViewById(R.id.frag_cartypes_inflated_name);
mCarTypeImage = (CircleImageView) view.findViewById(R.id.frag_cartype_inflated_frameImage);
llRoot = (LinearLayout)view.findViewById(R.id.root1);
cardView=(CardView) view.findViewById(R.id.cardf);
}
public void setOnItemClickListner(setOnitemclick listener12) {
listener=listener12;
}
}
public void setOnItemClickListner(setOnitemclick listener12) {
listener=listener12;
}
public LoadVehicleTypeAdapter(Context context, List<TaxiTypeResponse.Message> CarTypesModelsList, VehicleTypeView vehicleTypeView) {
this.CarTypesModelsList = CarTypesModelsList;
mContext = context;
this.vehicleTypeView = vehicleTypeView;
}
#Override
public CarTypesHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView;
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.frag_cartype_inflated_view, parent, false);
return new CarTypesHolder(itemView);
}
#SuppressLint("ResourceType")
#Override
public void onBindViewHolder(final CarTypesHolder holder, final int position) {
TaxiTypeResponse.Message carTypesModel = CarTypesModelsList.get(position);
I=CarTypesModelsList.get(position).getID();
holder.mCarType.setText(carTypesModel.getName());
holder.mCarTypeImage.setBackgroundResource(R.drawable.wait);
int color = Color.parseColor(PreferenceHandler.readString(mContext,PreferenceHandler.SECONDRY_COLOR,"#006fb6"));
holder.llRoot.setSelected(selectedItems.get(position, false));
holder.mCarType.setTextColor(color);
holder.setOnItemClickListner(listener);
holder. llRoot.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
I=position;
if (I==position)
{
holder.llRoot.setBackgroundColor(Color.parseColor("#999999"));
holder.mCarType.setTextColor(Color.parseColor("#ffffff"));
}
else
{
holder.llRoot.setBackgroundColor(Color.parseColor("#f3f3f3"));
holder.mCarType.setTextColor(Color.parseColor("#00000"));
}
}
});
Picasso.with(mContext).load(carTypesModel.getImagePath()).into(holder.mCarTypeImage);
}
#Override
public long getItemId(int position) {
return CarTypesModelsList.get(position).getID();
}
#Override
public int getItemCount() {
return CarTypesModelsList.size();
}
public void setSelection(LinearLayout imageView,CustomTextView textView,boolean value,int position){
if(value){
imageView.setBackgroundColor(Color.parseColor("#999999"));
textView.setTextColor(Color.parseColor("#FFFFFF"));
}else{
System.out.println("11111111111111111000000111111111111");
imageView.setBackgroundColor(Color.parseColor("#f3f3f3"));
textView.setTextColor(Color.parseColor("#2196F3"));
}
}
public interface setOnitemclick{
void ImageClick(int position, String Name,String Description,int id);
void ImageClickfade(int position, String Name,String Description,int id);
}
#Override
public int getItemViewType(int position) {
return position;
}
}

You can try this,
You'll use to update gradle
maven { url "https://maven.google.com" }
and update the code
public class LoadVehicleTypeAdapter extends RecyclerView.Adapter<LoadVehicleTypeAdapter.CarTypesHolder> {
private List<TaxiTypeResponse.Message> CarTypesModelsList;
private Context mContext;
VehicleTypeView vehicleTypeView;
int I=-1;
public class CarTypesHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public CustomTextView mCarType;
public CircleImageView mCarTypeImage;
LinearLayout llRoot;
CardView cardView;
setOnitemclick listener;
public void setOnItemClickListner(setOnitemclick listener)
{
this.listener=listener;
}
public CarTypesHolder(View view) {
super(view);
mCarType = (CustomTextView) view.findViewById(R.id.frag_cartypes_inflated_name);
mCarTypeImage = (CircleImageView) view.findViewById(R.id.frag_cartype_inflated_frameImage);
llRoot = (LinearLayout)view.findViewById(R.id.root1);
cardView=(CardView) view.findViewById(R.id.cardf);
view.setOnClickListener(this);
}
#Override
public void onClick(View v) {
listener.ImageClick(v,getAdapterPosition());
}
}
public LoadVehicleTypeAdapter(Context context, List<TaxiTypeResponse.Message> CarTypesModelsList, VehicleTypeView vehicleTypeView) {
this.CarTypesModelsList = CarTypesModelsList;
mContext = context;
this.vehicleTypeView = vehicleTypeView;
}
#Override
public CarTypesHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.frag_cartype_inflated_view, parent, false);
return new CarTypesHolder(itemView);
}
#SuppressLint("ResourceType")
#Override
public void onBindViewHolder( final CarTypesHolder holder, int position) {
TaxiTypeResponse.Message carTypesModel = CarTypesModelsList.get(position);
holder.mCarType.setText(carTypesModel.getName());
holder.mCarTypeImage.setBackgroundResource(R.drawable.wait);
int color = Color.parseColor(PreferenceHandler.readString(mContext,PreferenceHandler.SECONDRY_COLOR,"#006fb6"));
holder.mCarType.setTextColor(color);
holder.setOnItemClickListner(new setOnitemclick() {
#Override
public void ImageClick(View v,int position1) {
I=position1;
notifyDataSetChanged();
}
});
if (I==position)
{
System.out.println("11100011111....");
holder.llRoot.setBackgroundColor(Color.parseColor("#999999"));
holder.mCarType.setTextColor(Color.parseColor("#ffffff"));
}
else
{
System.out.println("11100011111----");
holder.llRoot.setBackgroundColor(Color.parseColor("#f3f3f3"));
holder.mCarType.setTextColor(Color.parseColor("#2196F3"));
}
Picasso.with(mContext).load(carTypesModel.getImagePath()).into(holder.mCarTypeImage);
}
#Override
public long getItemId(int position) {
return CarTypesModelsList.get(position).getID();
}
#Override
public int getItemCount() {
return CarTypesModelsList.size();
}
public void setSelection(LinearLayout imageView,CustomTextView textView,boolean value,int position){
if(value){
imageView.setBackgroundColor(Color.parseColor("#999999"));
textView.setTextColor(Color.parseColor("#FFFFFF"));
}else{
System.out.println("11111111111111111000000111111111111");
imageView.setBackgroundColor(Color.parseColor("#f3f3f3"));
textView.setTextColor(Color.parseColor("#2196F3"));
}
}
public interface setOnitemclick{
void ImageClick(View view,int position);
}
#Override
public int getItemViewType(int position) {
return position;
}
}

Replace your click like below
public void onBindViewHolder(final CarTypesHolder holder, final int position) {
TaxiTypeResponse.Message carTypesModel = CarTypesModelsList.get(position);
I=CarTypesModelsList.get(position).getID();
holder.mCarType.setText(carTypesModel.getName());
holder.mCarTypeImage.setBackgroundResource(R.drawable.wait);
int color = Color.parseColor(PreferenceHandler.readString(mContext,PreferenceHandler.SECONDRY_COLOR,"#006fb6"));
holder.llRoot.setSelected(selectedItems.get(position, false));
holder.mCarType.setTextColor(color);
holder.setOnItemClickListner(listener);
holder. llRoot.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
I=position;
holder.llRoot.setBackgroundColor(Color.parseColor("#999999"));
holder.mCarType.setTextColor(Color.parseColor("#ffffff"));
notifyDataSetChanged()
}
});
if (I==position)
{
holder.llRoot.setBackgroundColor(Color.parseColor("#999999"));
holder.mCarType.setTextColor(Color.parseColor("#ffffff"));
}
else
{
holder.llRoot.setBackgroundColor(Color.parseColor("#f3f3f3"));
holder.mCarType.setTextColor(Color.parseColor("#00000"));
}
Picasso.with(mContext).load(carTypesModel.getImagePath()).into(holder.mCarTypeImage);
}

Recyclerview ClassCastException at onBindViewHolder

I made RecyclerView inside RecyclerView. There is ClassCastException at onBindViewHolder.
The error message here.
java.lang.ClassCastException: com.work.hany.playinseoul.main.adapter.MainRecyclerViewAdapter$TourViewHolder$TourSectionItemsAdapter$TourItemViewHolder cannot be cast to com.work.hany.playinseoul.main.adapter.MainRecyclerViewAdapter$CategoryViewHolder$CategoryItemViewHolder
at com.work.hany.playinseoul.main.adapter.MainRecyclerViewAdapter$CategoryViewHolder$CategoryHorizontalAdapter.onBindViewHolder(MainRecyclerViewAdapter.java:216)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6673)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6714)
But I could not catch ClassCastException at TourSectionItemsAdapter onBindViewHolder.
So, I can't check holder type at TourSectionItemsAdapter onBindViewHolder.
Only I caught ClassCastException at MainRecyclerViewAdapter onBindViewHolder.
But MainRecyclerViewAdapter onBindViewHolder holder type is same cast hodler class. Check screen shot.
My code here.
import android.support.annotation.NonNull;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
...
import java.util.ArrayList;
public class MainRecyclerViewAdapter extends BaseSectionRecyclerAdapter {
private MainRecyclerViewAdapter.ItemListener mainItemListener;
private RecyclerView.RecycledViewPool recycledViewPool;
public interface ItemListener {
void onTourClicked(AreaTour tour);
void onMoreTourClicked(AreaTour tour);
}
public MainRecyclerViewAdapter(ArrayList<Section> sections, MainRecyclerViewAdapter.ItemListener mainItemListener) {
this.mainItemListener = mainItemListener;
this.sections = sections;
}
#Override
public void onAttachedToRecyclerView(#NonNull RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
this.recycledViewPool = recyclerView.getRecycledViewPool();
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
ViewHolder viewHolder = null;
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
Section.ItemType currentItemType = getCurrentItemType(viewType);
View itemView;
switch (currentItemType) {
case CATEGORY:
itemView = inflater.inflate(R.layout.main_recycler_row_category, parent, false);
CategoryViewHolder categoryViewHolder = new CategoryViewHolder(itemView);
categoryViewHolder.categoryRecyclerView.setRecycledViewPool(recycledViewPool);
viewHolder = categoryViewHolder;
break;
case MAIN_TOUR:
itemView = inflater.inflate(R.layout.main_recycler_row_tour, parent, false);
TourViewHolder tourViewHolder = new TourViewHolder(itemView);
tourViewHolder.tourSectionItemsRecyclerView.setRecycledViewPool(recycledViewPool);
viewHolder = tourViewHolder;
break;
}
return viewHolder;
}
private int categoryRecyclerViewScrollPosition = 0;
#Override
public void onViewRecycled(#NonNull ViewHolder holder) {
super.onViewRecycled(holder);
if (Section.ItemType.CATEGORY.getCode() == holder.getItemViewType()) {
CategoryViewHolder categoryViewHolder = CategoryViewHolder.class.cast(holder);
RecyclerView categoryRecyclerView = categoryViewHolder.categoryRecyclerView;
categoryRecyclerViewScrollPosition = categoryRecyclerView.computeHorizontalScrollOffset();
}
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, final int position) {
super.onBindViewHolder(holder, position);
try {
if (Section.ItemType.CATEGORY.getCode() == holder.getItemViewType()) {
CategoryViewHolder categoryViewHolder = CategoryViewHolder.class.cast(holder);
categoryViewHolder.categoryRecyclerView.scrollBy(categoryRecyclerViewScrollPosition, 0);
}
} catch (ClassCastException e) {
Log.e("HANY_TAG", "MainRecyclerViewAdapter.onBindViewHolder" + e.getClass().getSimpleName());
// But.... holder type is CategoryViewHolder.
}
}
class TourViewHolder extends ViewHolder<ArrayList<AreaTour>> {
private ImageView tourSectionImageView;
private TextView tourSectionTitleTextView;
private RecyclerView tourSectionItemsRecyclerView;
public TourViewHolder(View itemView) {
super(itemView);
tourSectionImageView = itemView.findViewById(R.id.tour_content_image_view);
tourSectionTitleTextView = itemView.findViewById(R.id.tour_section_title_text_view);
tourSectionItemsRecyclerView = itemView.findViewById(R.id.tour_section_item_recycler_view);
}
#Override
public void bind(final ArrayList<AreaTour> areaTour) {
String sectionTitle = ConverterUtils.convertContentType(areaTour.get(0).getContentTypeId());
tourSectionTitleTextView.setText(sectionTitle);
ImageLoderUtils.lodeURI(tourSectionImageView, areaTour.get(areaTour.size() - 1).getLargeImage());
TourSectionItemsAdapter tourSectionItemsAdapter = new TourSectionItemsAdapter(areaTour);
tourSectionItemsRecyclerView.setLayoutManager(new GridLayoutManager(itemView.getContext(), 2));
tourSectionItemsRecyclerView.setAdapter(tourSectionItemsAdapter);
}
private class TourSectionItemsAdapter extends RecyclerView.Adapter<TourSectionItemsAdapter.TourItemViewHolder> {
private ArrayList<AreaTour> areaTourList;
private final int SECTION_IMAGE_COUNT = 1;
public TourSectionItemsAdapter(ArrayList<AreaTour> areaTourList) {
this.areaTourList = areaTourList;
}
#NonNull
#Override
public TourItemViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
return new TourItemViewHolder(inflater.inflate(R.layout.main_recycler_row_tour_item, null));
}
#Override
public void onBindViewHolder(#NonNull TourItemViewHolder holder, int position) {
holder.bind(areaTourList.get(position));
}
#Override
public int getItemCount() {
return areaTourList.size() - SECTION_IMAGE_COUNT;
}
class TourItemViewHolder extends ViewHolder<AreaTour> {
private ImageView tourImageView;
private TextView tourTextView;
private TextView tourAddrTextView;
private TextView tourContentShowCountTextView;
public TourItemViewHolder(View itemView) {
super(itemView);
tourImageView = itemView.findViewById(R.id.tour_content_image_view);
tourTextView = itemView.findViewById(R.id.tour_title_text_view);
tourContentShowCountTextView = itemView.findViewById(R.id.tour_show_text_view);
tourAddrTextView = itemView.findViewById(R.id.tour_content_addr_text_view);
}
public void bind(final AreaTour tour) {
ImageLoderUtils.lodeURI(tourImageView, tour.getLargeImage());
tourTextView.setText(tour.getContentTitle());
String countStr = new StringBuilder().append("조회수 ").append(tour.getReadCount()).toString();
tourContentShowCountTextView.setText(countStr);
tourAddrTextView.setText(tour.getAreaAddress());
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mainItemListener.onTourClicked(tour);
}
});
}
}
}
}
class CategoryViewHolder extends ViewHolder<ArrayList<ContentType>> {
private RecyclerView categoryRecyclerView;
// private TextView categoryTitleView;
public CategoryViewHolder(View itemView) {
super(itemView);
// categoryTitleView = itemView.findViewById(R.id.main_tour_title_text_view);
categoryRecyclerView = itemView.findViewById(R.id.main_tour_recycler_view);
categoryRecyclerView.setHasFixedSize(true);
}
#Override
public void bind(ArrayList<ContentType> data) {
CategoryHorizontalAdapter categoryHorizontalAdapter = new CategoryHorizontalAdapter(data);
LinearLayoutManager layoutManager = new LinearLayoutManager(itemView.getContext(), LinearLayoutManager.HORIZONTAL, false);
categoryRecyclerView.setLayoutManager(layoutManager);
categoryRecyclerView.setAdapter(categoryHorizontalAdapter);
}
private class CategoryHorizontalAdapter extends RecyclerView.Adapter<CategoryItemViewHolder> {
private ArrayList<ContentType> categoryTypes;
public CategoryHorizontalAdapter(ArrayList<ContentType> categoryTypes) {
this.categoryTypes = categoryTypes;
}
#NonNull
#Override
public CategoryItemViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
return new CategoryItemViewHolder(inflater.inflate(R.layout.main_recycler_row_category_item, null));
}
#Override
public void onBindViewHolder(#NonNull CategoryItemViewHolder holder, int position) {
holder.bind(categoryTypes.get(position));
}
#Override
public int getItemCount() {
return categoryTypes.size();
}
}
private class CategoryItemViewHolder extends ViewHolder<ContentType> {
private TextView categoryTitleTextView;
public CategoryItemViewHolder(View itemView) {
super(itemView);
categoryTitleTextView = itemView.findViewById(R.id.category_item_title_text_view);
}
public void bind(ContentType type) {
categoryTitleTextView.setText(type.getName());
}
}
}
}
BaseSectionRecyclerAdapter code.
abstract public class BaseSectionRecyclerAdapter extends RecyclerView.Adapter<ViewHolder> {
protected ArrayList<Section> sections;
#Override
public int getItemCount() {
return sections.size();
}
public <T>void addSection(Section.ItemType type, T data){
sections.add(new Section(type,data));
notifyDataSetChanged();
}
public <T>void updateSection(Section.ItemType type, T data) {
for(int position = 0, end = sections.size(); position < end; position++ ){
if (sections.get(position).getType().equals(type)) {
sections.get(position).setData(data);
notifyItemChanged(position);
}
}
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
holder.bind((sections.get(position).getData()));
}
#Override
public int getItemViewType(int position) {
return sections.get(position).getType().getCode();
}
protected Section.ItemType getCurrentItemType(int position) {
for (Section.ItemType itemType : Section.ItemType.values()) {
if (itemType.getCode() == position) return itemType;
}
return NOTHING;
}
}
ViewHolder code.
public abstract class ViewHolder<T> extends RecyclerView.ViewHolder {
public ViewHolder(View itemView) {
super(itemView);
}
abstract public void bind(T data);
}
I don't understand what I did wrong...
How to solve it?

I just faced that issue that I commented above. I was using the switch case in onBindViewHolderfunction and I haven't written the default case, When I added the default case then the error is fixed.
In your case, you are using an if condition in onBindViewHolder(), just try to add an else to the function and try.
hope you fixed the issue if it is not, then try this one. Thank you.

maybe its late but for the feature readers just define viewPool like this
private val viewPool = RecyclerView.RecycledViewPool()

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

Create Base Adapters For All Recycler View Adapters - java

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