古人学问无遗力，少壮工夫老始成。这篇文章主要讲述带有列表的android Recyclerview相互重叠相关的知识，希望能为你提供帮助。
【带有列表的android Recyclerview相互重叠】这是图像

文章图片

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public class ProductFragment extends Fragmentimplements SearchView.OnQueryTextListener,ProductAdaptor.ProductAdapterListener { private static final String TAG = ProductFragment.class.getSimpleName(); /** The default socket timeout in milliseconds */ public static final int DEFAULT_TIMEOUT_MS = 2500; /** The default number of retries */ public static final int DEFAULT_MAX_RETRIES = 1; /** The default backoff multiplier */ public static final float DEFAULT_BACKOFF_MULT = 1f; private ProductAdaptor adapter; private RecyclerView recyclerView; private RequestQueue requestQueue; private VolleySingleton volleySingleton; // To store all the products private staticList< ProductInfo> productsList=new ArrayList< > (); ProductAdaptor.ProductAdapterListener listener; //Progress dialog private ProgressDialog pDialog; public static ProductFragment newInstance() { return new ProductFragment(); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); pDialog = new ProgressDialog(getActivity()); pDialog.setCancelable(false); listener=this; }@Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View layout=inflater.inflate(R.layout.product_fragment,container,false); recyclerView= (RecyclerView) layout.findViewById(R.id.productList); recyclerView.setLayoutManager(new LinearLayoutManager(getActivity())); pDialog.setMessage("Fetching products..."); showpDialog(); volleySingleton=VolleySingleton.getInstance(); requestQueue=volleySingleton.getRequestQueue(); JsonObjectRequest jsObjRequest = new JsonObjectRequest (Request.Method.GET, AppConfig.URL_PRODUCTS, (String) null, new Response.Listener< JSONObject> () {@Override public void onResponse(JSONObject response) { //hide the progress dialog hidepDialog(); adapter=new ProductAdaptor(getActivity(),parseJSONOResponse(response),listener); recyclerView.setAdapter(adapter); } }, new Response.ErrorListener() {@Override public void onErrorResponse(VolleyError error) {VolleyLog.d(TAG, "Error: " + error.getMessage()); Toast.makeText(MyApplication.getAppContext(), error.getMessage(), Toast.LENGTH_SHORT).show(); // hide the progress dialog hidepDialog(); } }); // Wait 20 seconds and don't retry more than oncejsObjRequest.setRetryPolicy(new DefaultRetryPolicy( DEFAULT_TIMEOUT_MS, DEFAULT_MAX_RETRIES, DEFAULT_BACKOFF_MULT)); requestQueue.add(jsObjRequest); return layout; }@Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); setHasOptionsMenu(true); } public boolean PerformSearch(String searchString){//adapter.getFilter().filter(searchString); return true; }public void setDataSet(List< ProductInfo> newDataSet){ productsList = newDataSet; adapter=new ProductAdaptor(MyApplication.getAppContext(),productsList,this); recyclerView.swapAdapter(adapter, false); //new way of filtering data}private List< ProductInfo> parseJSONOResponse(JSONObject response){ try {JSONArray products = response.getJSONArray("products"); for (int i = 0; i < products.length(); i++) {JSONObject product = (JSONObject) products .get(i); String id = product.getString("product_id"); String name = product.getString("name"); String description = product .getString("description"); String image = AppConfig.URL_IMAGE_PRODUCTS + product.getString("image"); BigDecimal price = new BigDecimal(product .getString("price")); ProductInfo p = new ProductInfo(id, name, description, image, price); productsList.add(p); } return productsList; } catch (JSONException e) {e.printStackTrace(); Toast.makeText(getActivity(), "Error: " + e.getMessage(), Toast.LENGTH_LONG).show(); } return productsList; } @Override public void onAddToCartPressed(ProductInfo product) { CartHandler cartHandler=new CartHandler(MyApplication.getAppContext()); if (cartHandler.getProductsInCartCount()==0) { cartHandler.addProductInCart(product); Toast.makeText(MyApplication.getAppContext(), product.getName() + " added to cart!", Toast.LENGTH_SHORT).show(); } else{ ProductInfo temp=cartHandler.getProductInCart(Integer.parseInt(product.getId())); if (temp!=null){cartHandler.updateProduct(product); Toast.makeText(MyApplication.getAppContext(), product.getName() + " added to cart!", Toast.LENGTH_SHORT).show(); }else {cartHandler.addProductInCart(product); Toast.makeText(MyApplication.getAppContext(), product.getName() + " added to cart!",Toast.LENGTH_SHORT).show(); } }} private void showpDialog() { if (!pDialog.isShowing()){ pDialog.show(); } }private void hidepDialog() { if (pDialog.isShowing()) pDialog.dismiss(); }@Override public boolean onQueryTextSubmit(String query) {return false; }@Override public boolean onQueryTextChange(String query) { // final List< ProductInfo> filteredModelList = filter(productsList, query); // adapter.animateTo(filteredModelList); //recyclerView.scrollToPosition(0); return true; }private List< ProductInfo> filter(List< ProductInfo> models, String query) { query = query.toLowerCase(); final List< ProductInfo> filteredModelList = new ArrayList< > (); for (ProductInfo model : models) { final String text = model.getName().toLowerCase(); if (text.contains(query)) { filteredModelList.add(model); } } return filteredModelList; }

}
产品适配器

public class ProductAdaptor extends RecyclerView.Adapter< ProductAdaptor.ProductViewHolder> { //implements Filterable {private final LayoutInflater inflator; private final List< ProductInfo> products; private Context context; private ProductAdapterListener listener; ImageLoader imageLoader = VolleySingleton.getInstance().getImageLoader(); //private List< ProductInfo> BackupProducts= Collections.emptyList(); ProductInfo current; public ProductAdaptor(Context context, List< ProductInfo> data, ProductAdapterListener listener){ inflator= LayoutInflater.from(context); products=data; this.context=context; this.listener=listener; //BackupProducts=data; }@Override public ProductAdaptor.ProductViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view=inflator.inflate(R.layout.custom_product, parent, false); ProductViewHolder holder=new ProductViewHolder(view); return holder; }@Override public void onBindViewHolder(final ProductAdaptor.ProductViewHolder holder, final int position) { current=products.get(position); holder.title.setText(current.getName()); holder.icon.setImageUrl(current.getImage(), imageLoader); holder.price.setText("Price: Rs. " + current.getPrice()); holder.description.setText(current.getDescription()); holder.add_Cart.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { products.get(position).setQuantity(Integer.parseInt(holder.etQuantity.getText().toString())); listener.onAddToCartPressed(products.get(position)); } }); holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Log.d("Reading Position", "" + current.getId()); Intent base=new Intent(context, Products.class); base.putExtra("product_id", Integer.parseInt(products.get(position).getId())); base.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_MULTIPLE_TASK); context.startActivity(base); } }); } public void setData(List< ProductInfo> list){ products.clear(); products.addAll(list); notifyDataSetChanged(); } /* public void flushFilter(){ products.clear(); products.addAll(BackupProducts); notifyDataSetChanged(); }*/public void animateTo(List< ProductInfo> models) { applyAndAnimateRemovals(models); applyAndAnimateAdditions(models); applyAndAnimateMovedItems(models); }private void applyAndAnimateRemovals(List< ProductInfo> newModels) { for (int i = products.size() - 1; i > = 0; i--) { final ProductInfo model = products.get(i); if (!newModels.contains(model)) { removeItem(i); } } }private void applyAndAnimateAdditions(List< ProductInfo> newModels) { for (int i = 0, count = newModels.size(); i < count; i++) { final ProductInfo model = newModels.get(i); if (!products.contains(model)) { addItem(i, model); } } }private void applyAndAnimateMovedItems(List< ProductInfo> newModels) { for (int toPosition = newModels.size() - 1; toPosition > = 0; toPosition--) { final ProductInfo model = newModels.get(toPosition); final int fromPosition = products.indexOf(model); if (fromPosition > = 0 & & fromPosition != toPosition) { moveItem(fromPosition, toPosition); } } }public ProductInfo removeItem(int position) { final ProductInfo model = products.remove(position); notifyItemRemoved(position); return model; }public void addItem(int position, ProductInfo model) { products.add(position, model); notifyItemInserted(position); }public void moveItem(int fromPosition, int toPosition) { final ProductInfo model = products.remove(fromPosition); products.add(toPosition, model); notifyItemMoved(fromPosition, toPosition); }@Override public int getItemCount() { return products.size(); } /* @Override public Filter getFilter() { //flushFilter(); return new CardFilter(this,BackupProducts); } */public interface ProductAdapterListener { void onAddToCartPressed(ProductInfo product); }class ProductViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{ TextView title; NetworkImageView icon; TextView price; TextView description; LinearLayout add_Cart; TextView etQuantity; public ProductViewHolder(final View itemView) {super(itemView); icon =(NetworkImageView) itemView.findViewById(R.id.productImage); title = (TextView) itemView.findViewById(R.id.productName); price= (TextView) itemView.findViewById(R.id.productPrice); description=(TextView) itemView.findViewById(R.id.productDescription); add_Cart= (LinearLayout) itemView.findViewById(R.id.add_cart); etQuantity= (TextView) itemView.findViewById(R.id.quanity); }@Override public void onClick(View v) {} }

这些都是本产品列表的类别，如果您需要更多信息，请发表评论
提前致谢
有两个类，它们从我的json中获取产品并将其分配给视图持有者
答案这个问题是由于重叠片段引起的，我正在像这样开始片段

fragment=ProductFragment.newInstance(); getSupportFragmentManager().beginTransaction() .replace(R.id.productFragment,fragment ) .commit();

所以简单地说

fragment=ProductFragment.newInstance();

解决了我的问题。
谢谢你们的帮助@MohammadAllam
另一答案很多搜索后我也有这个问题我用更新gradle依赖项修复它我觉得它发生的原因是一个旧的android依赖项。

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