http://i.stack.imgur.com/HZ3v6.png
这是回收者视图的图片
我不明白可能导致此问题的原因。那么请你们给出一个可能原因的概率。
先谢谢。
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);
}
static 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) {
}
}
/*
//FILTER THE SEARCH RESULTS
private static class CardFilter extends Filter {
private final ProductAdaptor adapter;
private final List<ProductInfo> originalList;
private final List<ProductInfo> filteredList;
private CardFilter(ProductAdaptor adapter, List<ProductInfo> originalList) {
super();
this.adapter = adapter;
this.originalList = new LinkedList<ProductInfo>(originalList);
this.filteredList = new ArrayList<ProductInfo>();
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
filteredList.clear();
final FilterResults results = new FilterResults();
if (constraint.length() == 0) {
filteredList.addAll(originalList);
} else {
final String filterPattern = constraint.toString().toLowerCase().trim();
for (final ProductInfo productInfo : originalList) {
if (productInfo.getName().toLowerCase().trim().contains(filterPattern)) {
filteredList.add(productInfo);
}
}
}
results.values = filteredList;
results.count = filteredList.size();
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
adapter.setData((ArrayList<ProductInfo>) results.values);
adapter.notifyDataSetChanged();
}
}
*/
}
产品碎片
public class ProductFragment extends Fragment implements SearchView.OnQueryTextListener,ProductAdaptor.ProductAdapterListener {
private static final String TAG = ProductFragment.class.getSimpleName();
private ProductAdaptor adapter;
private RecyclerView recyclerView;
private RequestQueue requestQueue;
private VolleySingleton volleySingleton;
// To store all the products
private List<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);
}
}, 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 once
requestQueue.add(jsObjRequest);
recyclerView.setAdapter(adapter);
return layout;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setHasOptionsMenu(true);
}
/*
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_main,menu);
final MenuItem item = menu.findItem(R.id.search);
final SearchView searchView = (android.support.v7.widget.SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
}
*/
public boolean PerformSearch(String searchString){
//adapter.getFilter().filter(searchString);
return true;
}
public void setDataSet(List<ProductInfo> newDataSet){
adapter=new ProductAdaptor(MyApplication.getAppContext(),newDataSet,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());
Log.d("Insert: ", "Inserting ..");
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;
}
}
答案 0 :(得分：0)
这个问题是由于重叠的片段造成的，我正在像这样开始片段
fragment=ProductFragment.newInstance();
getSupportFragmentManager().beginTransaction()
.replace(R.id.productFragment,fragment )
.commit();
所以简单地说就是
fragment=ProductFragment.newInstance();
解决了我的问题。
谢谢你们的帮助@MohammadAllam