从火力基地查询的数据不会显示在recyclerview和grid视图中
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我从Firebase查询数据，并将其添加到horizontalscrollmodellist和viewalllist中，并传递到主页适配器以在网格布局和水平滚动布局中显示，它可以完美地在主页中显示查询的数据。但是，如果我从适配器传递相同的列表以查看所有活动以在回收器视图中显示，并且网格视图代码看起来很好并且没有错误，但是当应用程序运行该视图时，所有活动都不会在网格视图和回收器视图中显示数据。我已经尝试了一切，但问题仍然存在。请帮助我。
谢谢大家！
这是查询列表：
package com.my.electroshop;
import android.content.Context;
import android.widget.Toast;
import androidx.annotation.NonNull;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.QueryDocumentSnapshot;
import com.google.firebase.firestore.QuerySnapshot;
import java.util.ArrayList;
import java.util.List;
public class DBqueries
public static FirebaseFirestore firebaseFirestore = FirebaseFirestore.getInstance();
public static List<CatagoryModel> catagoryModelList = new ArrayList<>();
public static List<HomePageModel> homePageModelList = new ArrayList<>();
public static void loadCategories(final CatagoryAdaptor catagoryAdaptor , final Context context)
firebaseFirestore.collection("CATEGORIES").orderBy("index").get()
.addOnCompleteListener(new OnCompleteListener<QuerySnapshot>()
@Override
public void onComplete(@NonNull Task<QuerySnapshot> task)
if (task.isSuccessful())
for(QueryDocumentSnapshot documentSnapshot : task.getResult())
catagoryModelList.add(new CatagoryModel(documentSnapshot.get("icon").toString(),documentSnapshot.get("categoryName").toString()));
catagoryAdaptor.notifyDataSetChanged();
else
String error = task.getException().getMessage();
Toast.makeText(context, error,Toast.LENGTH_SHORT).show();
);
public static void loadFragmentData(final HomePageAdapter adapter , final Context context)
firebaseFirestore.collection("CATEGORIES").document("HOME").collection("TOP_DEALS").orderBy("index").get()
.addOnCompleteListener(new OnCompleteListener<QuerySnapshot>()
@Override
public void onComplete(@NonNull Task<QuerySnapshot> task)
if (task.isSuccessful())
for(QueryDocumentSnapshot documentSnapshot : task.getResult())
if ((long) documentSnapshot.get("view_type") == 0)
List<SliderModel> sliderModelList = new ArrayList<>();
long no_of_banners = (long) documentSnapshot.get("no_of_banners");
for (long x = 1;x < no_of_banners +1;x++)
sliderModelList.add(new SliderModel(documentSnapshot.get("banner_" + x).toString()
, documentSnapshot.get("banner_" + x + "_background").toString()));
homePageModelList.add(new HomePageModel(0, sliderModelList));
else if ((long) documentSnapshot.get("view_type") == 1)
homePageModelList.add(new HomePageModel(1, documentSnapshot.get("strip_ad_banner").toString(),
documentSnapshot.get("background").toString()));
else if ((long) documentSnapshot.get("view_type") == 2)
List<WishListModel> viewAllProductList = new ArrayList<>();
List<HorizontalProductScrollModel> horizontalProductScrollModelList = new ArrayList<>();
long no_of_products = (long) documentSnapshot.get("no_of_products");
for (long x = 1;x < no_of_products +1;x++)
horizontalProductScrollModelList.add(new HorizontalProductScrollModel(documentSnapshot.get("product_ID_"+x).toString()
, documentSnapshot.get("product_image_"+x).toString()
,documentSnapshot.get("product_title_"+x).toString()
,documentSnapshot.get("product_subtitle_"+x).toString()
,documentSnapshot.get("product_price_"+x).toString()));
viewAllProductList.add(new WishListModel(documentSnapshot.get("product_image_"+x).toString()
,documentSnapshot.get("product_full_title_"+x).toString()
,(long)documentSnapshot.get("free_coupens_"+x)
,documentSnapshot.get("average_rating_"+x).toString()
,(long)documentSnapshot.get("total_rating_"+x)
,documentSnapshot.get("product_price_"+x).toString()
,documentSnapshot.get("cutted_price_"+x).toString()
,(boolean)documentSnapshot.get("COD_"+x)));
homePageModelList.add(new HomePageModel(2, documentSnapshot.get("layout_title").toString()
, documentSnapshot.get("layout_background").toString(), horizontalProductScrollModelList , viewAllProductList));
else if ((long) documentSnapshot.get("view_type") == 3)
List<HorizontalProductScrollModel> gridLayoutModelList = new ArrayList<>();
long no_of_products = (long) documentSnapshot.get("no_of_products");
for (long x = 1;x < no_of_products +1;x++)
gridLayoutModelList.add(new HorizontalProductScrollModel(documentSnapshot.get("product_ID_"+x).toString()
, documentSnapshot.get("product_image_"+x).toString()
,documentSnapshot.get("product_title_"+x).toString()
,documentSnapshot.get("product_subtitle_"+x).toString()
,documentSnapshot.get("product_price_"+x).toString()));
homePageModelList.add(new HomePageModel(3, documentSnapshot.get("layout_title").toString()
, documentSnapshot.get("layout_background").toString(), gridLayoutModelList));
adapter.notifyDataSetChanged();
else
String error = task.getException().getMessage();
Toast.makeText(context, error,Toast.LENGTH_SHORT).show();
);
这是主页适配器
package com.my.electroshop;
import android.content.Intent;
import android.content.res.ColorStateList;
import android.graphics.Color;
import android.os.Handler;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.gridlayout.widget.GridLayout;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.viewpager.widget.ViewPager;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.RequestOptions;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
public class HomePageAdapter extends RecyclerView.Adapter
private List<HomePageModel> homePageModelList;
private RecyclerView.RecycledViewPool recycledViewPool;
public HomePageAdapter(List<HomePageModel> homePageModelList)
this.homePageModelList = homePageModelList;
recycledViewPool = new RecyclerView.RecycledViewPool();
@Override
public int getItemViewType(int position)
switch (homePageModelList.get(position).getType())
case 0:
return HomePageModel.BANNER_SLIDER;
case 1:
return HomePageModel.STRIP_AD_BANNER;
case 2:
return HomePageModel.HORIZONTAL_PRODUCT_VIEW;
case 3:
return HomePageModel.GRID_PRODUCT_VIEW;
default:
return -1;
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
switch (viewType)
case HomePageModel.BANNER_SLIDER:
View bannerSliderView = LayoutInflater.from(parent.getContext()).inflate(R.layout.sliding_ad_layout, parent, false);
return new BannerSliderViewHolder(bannerSliderView);
case HomePageModel.STRIP_AD_BANNER:
View stripAdView = LayoutInflater.from(parent.getContext()).inflate(R.layout.strip_ad_layout, parent, false);
return new StripAdBannerViewHolder(stripAdView);
case HomePageModel.HORIZONTAL_PRODUCT_VIEW:
View horizontalProductView = LayoutInflater.from(parent.getContext()).inflate(R.layout.horizontal_scroll_layout, parent, false);
return new HorizontalProductViewHolder(horizontalProductView);
case HomePageModel.GRID_PRODUCT_VIEW:
View gridProductView = LayoutInflater.from(parent.getContext()).inflate(R.layout.grid_product_layout, parent, false);
return new GridProductViewHolder(gridProductView);
default:
return null;
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position)
switch (homePageModelList.get(position).getType())
case HomePageModel.BANNER_SLIDER:
List<SliderModel> sliderModelList = homePageModelList.get(position).getSliderModelList();
((BannerSliderViewHolder) holder).setBannerSliderViewPager(sliderModelList);
break;
case HomePageModel.STRIP_AD_BANNER:
String resource = homePageModelList.get(position).getResource();
String color = homePageModelList.get(position).getBackgroundColor();
((StripAdBannerViewHolder) holder).setStripAd(resource, color);
break;
case HomePageModel.HORIZONTAL_PRODUCT_VIEW:
String layoutColor = homePageModelList.get(position).getBackgroundColor();
String horizontalLayoutTitle = homePageModelList.get(position).getTitle();
List<WishListModel>viewAllProductList = homePageModelList.get(position).getViewAllProductList();
List<HorizontalProductScrollModel> horizontalProductScrollModelList =homePageModelList.get(position).getHorizontalProductScrollModelList();
((HorizontalProductViewHolder) holder).setHorizontalProductLayout(horizontalProductScrollModelList, horizontalLayoutTitle ,layoutColor , viewAllProductList);
break;
case HomePageModel.GRID_PRODUCT_VIEW:
String gridLayoutColor = homePageModelList.get(position).getBackgroundColor();
String gridLayoutTitle = homePageModelList.get(position).getTitle();
List<HorizontalProductScrollModel> gridProductScrollModelList =homePageModelList.get(position).getHorizontalProductScrollModelList();
((GridProductViewHolder) holder).setGridProductLayout(gridProductScrollModelList, gridLayoutTitle ,gridLayoutColor);
break;
default:
return;
@Override
public int getItemCount()
return homePageModelList.size();
public class BannerSliderViewHolder extends RecyclerView.ViewHolder
private ViewPager bannerSliderViewPager;
private int currentPage;
private Timer timer;
final private long DELAY_TIME = 3000;
final private long PERIOD_TIME = 3000;
private List<SliderModel> arrangedList;
public BannerSliderViewHolder(@NonNull View itemView)
super(itemView);
bannerSliderViewPager = itemView.findViewById(R.id.banner_slider_view_pager);
private void setBannerSliderViewPager(final List<SliderModel> sliderModelList)
currentPage = 2;
if(timer!=null)
timer.cancel();
arrangedList = new ArrayList<>();
for(int x = 0; x< sliderModelList.size() ; x++)
arrangedList.add(x,sliderModelList.get(x));
arrangedList.add(0,sliderModelList.get(sliderModelList.size() - 2));
arrangedList.add(1,sliderModelList.get(sliderModelList.size() - 1));
arrangedList.add(sliderModelList.get(0));
arrangedList.add(sliderModelList.get(1));
SliderAdapter sliderAdapter = new SliderAdapter(arrangedList);
bannerSliderViewPager.setAdapter(sliderAdapter);
bannerSliderViewPager.setClipToPadding(false);
bannerSliderViewPager.setPageMargin(20);
bannerSliderViewPager.setPageMargin(currentPage);
ViewPager.OnPageChangeListener onPageChangeListener = new ViewPager.OnPageChangeListener()
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels)
@Override
public void onPageSelected(int position)
currentPage = position;
@Override
public void onPageScrollStateChanged(int state)
if (state == ViewPager.SCROLL_STATE_IDLE)
pageLooper(arrangedList);
;
bannerSliderViewPager.addOnPageChangeListener(onPageChangeListener);
startBannerSlideShow(arrangedList);
bannerSliderViewPager.setOnTouchListener(new View.OnTouchListener()
@Override
public boolean onTouch(View v, MotionEvent event)
pageLooper(arrangedList);
stopBannerSlideShow();
if (event.getAction() == MotionEvent.ACTION_UP)
startBannerSlideShow(arrangedList);
return false;
);
private void pageLooper(List<SliderModel> sliderModelList)
if (currentPage == sliderModelList.size() - 2)
currentPage = 2;
bannerSliderViewPager.setCurrentItem(currentPage, false);
if (currentPage == 1)
currentPage = sliderModelList.size() - 3;
bannerSliderViewPager.setCurrentItem(currentPage, false);
private void startBannerSlideShow(final List<SliderModel> sliderModelList)
final Handler handler = new Handler();
final Runnable update = new Runnable()
@Override
public void run()
if (currentPage >= sliderModelList.size())
currentPage = 1;
bannerSliderViewPager.setCurrentItem(currentPage++, true);
;
timer = new Timer();
timer.schedule(new TimerTask()
@Override
public void run()
handler.post(update);
, DELAY_TIME, PERIOD_TIME);
private void stopBannerSlideShow()
timer.cancel();
public class StripAdBannerViewHolder extends RecyclerView.ViewHolder
private ImageView stripAdImage;
private ConstraintLayout stripAdContainer;
public StripAdBannerViewHolder(@NonNull View itemView)
super(itemView);
stripAdImage = itemView.findViewById(R.id.strip_ad_image);
stripAdContainer = itemView.findViewById(R.id.strip_ad_container);
private void setStripAd(String resource, String color)
Glide.with(itemView.getContext()).load(resource).apply(new RequestOptions().placeholder(R.mipmap.search)).into(stripAdImage);
stripAdContainer.setBackgroundColor(Color.parseColor(color));
public class HorizontalProductViewHolder extends RecyclerView.ViewHolder
private ConstraintLayout container;
private TextView horizontalLayoutTitle;
private Button horizontalViewAllBtn;
private RecyclerView horizontalRecyclerView;
public HorizontalProductViewHolder(@NonNull View itemView)
super(itemView);
container = itemView.findViewById(R.id.container);
horizontalLayoutTitle = itemView.findViewById(R.id.horizontal_scroll_layout_title);
horizontalViewAllBtn = itemView.findViewById(R.id.horizontal_scroll_view_all_btn);
horizontalRecyclerView = itemView.findViewById(R.id.horizontal_scroll_layout_recyclerview);
horizontalRecyclerView.setRecycledViewPool(recycledViewPool);
private void setHorizontalProductLayout(List<HorizontalProductScrollModel> horizontalProductScrollModelList, final String title , String color , final List<WishListModel> viewAllProductList)
container.setBackgroundTintList(ColorStateList.valueOf(Color.parseColor(color)));
horizontalLayoutTitle.setText(title);
if(horizontalProductScrollModelList.size()>8)
horizontalViewAllBtn.setVisibility(View.VISIBLE);
horizontalViewAllBtn.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
ViewAllActivity.wishListModelList = viewAllProductList;
Intent viewAllIntent = new Intent(itemView.getContext(),ViewAllActivity.class);
viewAllIntent.putExtra("Layout_code",0);
viewAllIntent.putExtra("title",title);
itemView.getContext().startActivity(viewAllIntent);
);
else
horizontalViewAllBtn.setVisibility(View.INVISIBLE);
HorizontalProductScrollAdapter horizontalProductScrollAdapter = new HorizontalProductScrollAdapter(horizontalProductScrollModelList);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(itemView.getContext());
linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
horizontalRecyclerView.setLayoutManager(linearLayoutManager);
horizontalRecyclerView.setAdapter(horizontalProductScrollAdapter);
horizontalProductScrollAdapter.notifyDataSetChanged();
public class GridProductViewHolder extends RecyclerView.ViewHolder
private ConstraintLayout container;
private TextView gridLayoutTitle;
private Button gridLayoutViewAllBtn;
private GridLayout gridProductLayout;
public GridProductViewHolder(@NonNull View itemView)
super(itemView);
container =itemView.findViewById(R.id.container);
gridLayoutTitle = itemView.findViewById(R.id.grid_product_layout_title);
gridLayoutViewAllBtn = itemView.findViewById(R.id.grid_product_layout_viewall_btn);
gridProductLayout = itemView.findViewById(R.id.grid_layout);
private void setGridProductLayout(final List<HorizontalProductScrollModel> horizontalProductScrollModelList, final String title , String color)
container.setBackgroundTintList(ColorStateList.valueOf(Color.parseColor(color)));
gridLayoutTitle.setText(title);
for(int x = 0; x < 4 ; x++)
ImageView productImage = gridProductLayout.getChildAt(x).findViewById(R.id.h_s_product_image);
TextView productTitle = gridProductLayout.getChildAt(x).findViewById(R.id.h_s_prodrct_title);
TextView productDescription = gridProductLayout.getChildAt(x).findViewById(R.id.h_s_product_discription);
TextView productPrice = gridProductLayout.getChildAt(x).findViewById(R.id.h_s_product_price);
Glide.with(itemView.getContext()).load(horizontalProductScrollModelList.get(x).getProductImage()).apply(new RequestOptions().placeholder(R.mipmap.search)).into(productImage);
productTitle.setText(horizontalProductScrollModelList.get(x).getProductTitle());
productDescription.setText(horizontalProductScrollModelList.get(x).getProductDescription());
productPrice.setText("Rs. "+horizontalProductScrollModelList.get(x).getProductPrice()+"/-");
gridProductLayout.getChildAt(x).setBackgroundColor(Color.parseColor("#ffffff"));
gridProductLayout.getChildAt(x).setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
Intent productDetailsIntent = new Intent(itemView.getContext(),ProductDetailsActivity.class);
itemView.getContext().startActivity(productDetailsIntent);
);
gridLayoutViewAllBtn.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
ViewAllActivity.horizontalProductScrollModelList = horizontalProductScrollModelList;
Intent viewAllIntent = new Intent(itemView.getContext(),ViewAllActivity.class);
viewAllIntent.putExtra("Layout_code",1);
viewAllIntent.putExtra("title", title);
itemView.getContext().startActivity(viewAllIntent);
);
这是查看所有活动：
package com.my.electroshop;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.GridView;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class ViewAllActivity extends AppCompatActivity
private RecyclerView recyclerView;
private GridView gridView;
public static List<HorizontalProductScrollModel> horizontalProductScrollModelList;
public static List<WishListModel> wishListModelList;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_all);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(true);
getSupportActionBar().setTitle(getIntent().getStringExtra("title"));
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
recyclerView = findViewById(R.id.recycler_view);
gridView = findViewById(R.id.grid_view);
int layout_code = getIntent().getIntExtra("layout_code",-1);
if(layout_code == 0)
recyclerView.setVisibility(View.VISIBLE);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(RecyclerView.VERTICAL);
recyclerView.setLayoutManager(layoutManager);
WishListAdapter adapter = new WishListAdapter(wishListModelList, false);
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
else if (layout_code == 1)
gridView.setVisibility(View.VISIBLE);
GridProductLayoutAdapter gridProductLayoutAdapter = new GridProductLayoutAdapter(horizontalProductScrollModelList);
gridView.setAdapter(gridProductLayoutAdapter);
@Override
public boolean onOptionsItemSelected(MenuItem item)
if(item.getItemId() == android.R.id.home)
finish();
return true;
return super.onOptionsItemSelected(item);
在错误部分，当我切换以查看所有活动时将显示此>
我从Firebase查询数据，并将其添加到horizontalscrollmodellist和viewalllist中，并传递到主页适配器以在网格布局和水平滚动布局中显示，它完美地显示了查询的数据...
答案
我也有同样的问题，如果您有解决方案，请帮助我
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