问题
I am using recyclerview with footer everything is working fine. but i am not able to delete last item. Suppose we have 2 products in list now if user will remove one product then 1 product will remain in recyclerview then i am not able to delete that remaining product.
While i have one item it shows PACK ID null
genericViewHolder.removes.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
packid=currentItem.getCart_Product_packid();
System.out.println("PACK ID"+packid);
deletetocart();
}
});
ADAPTER
public class HeaderFooterAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int TYPE_HEADER = 0;
private static final int TYPE_ITEM = 1;
private static final int TYPE_FOOTER = 2;
private ArrayList<CartModel> idlistData;
private AQuery aQuery;
Context context;
public HeaderFooterAdapter(Context context,ArrayList<CartModel> idlistData) {
this.context = context;
this.idlistData = idlistData;
aQuery = new AQuery(this.context);
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder (ViewGroup parent, int viewType) {
if(viewType == TYPE_HEADER) {
View v = LayoutInflater.from (parent.getContext ()).inflate (R.layout.item_header, parent, false);
return new HeaderViewHolder (v);
} else if(viewType == TYPE_FOOTER) {
View v = LayoutInflater.from (parent.getContext ()).inflate (R.layout.item_footer, parent, false);
return new FooterViewHolder (v);
} else if(viewType == TYPE_ITEM) {
View v = LayoutInflater.from (parent.getContext ()).inflate (R.layout.listitem_buynow, parent, false);
return new GenericViewHolder (v);
}
return null;
}
private CartModel getItem (int position) {
return idlistData.get (position);
}
@Override
public void onBindViewHolder (RecyclerView.ViewHolder holder, int position) {
if(holder instanceof HeaderViewHolder) {
HeaderViewHolder headerHolder = (HeaderViewHolder) holder;
headerHolder.txtTitleHeader.setText ("Header");
headerHolder.txtTitleHeader.setOnClickListener (new View.OnClickListener () {
@Override
public void onClick (View view) {
// Toast.makeText (context, "Clicked Header", Toast.LENGTH_SHORT).show ();
}
});
} else if(holder instanceof FooterViewHolder) {
FooterViewHolder footerHolder = (FooterViewHolder) holder;
footerHolder.txtTitleFooter.setText ("Footer");
footerHolder.FooterCheckout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Toast.makeText(context, "Clicked Footer", Toast.LENGTH_SHORT).show();
if(userd > 0)
{
System.out.println("Positive");
Intent intent=new Intent(BuyNowActivity.this,DelieveringProduct.class);
startActivity(intent);
}
else
{
System.out.println("Negative");
String skipsid=String.valueOf(userd);
Intent intent=new Intent(BuyNowActivity.this,Login_Page.class);
intent.putExtra("proceedtocheckoutid",skipsid);
intent.putExtra("isCheckOut",true);
startActivity(intent);
}
}
});
} else if(holder instanceof GenericViewHolder) {
final CartModel currentItem = getItem (position - 1);
final GenericViewHolder genericViewHolder = (GenericViewHolder) holder;
genericViewHolder.txtName.setText(currentItem.getCart_Product_Name());
String pics = currentItem.getCart_Product_Img();
aQuery.id(genericViewHolder.proimage).image(pics, true, true, 0, R.mipmap.ic_launcher);
genericViewHolder.buynowprice.setText("$" + currentItem.getCart_Product_Price());
genericViewHolder.buynowqtys.setText(currentItem.getCart_Product_Qty());
genericViewHolder.discounttext.setText(currentItem.getCart_Product_packDiscount());
subtotal.setText("$" + currentItem.getCart_Product_Price());
genericViewHolder.edtcoupan.setText(currentItem.getCart_Product_coupancode());
genericViewHolder.gocoupan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(genericViewHolder.edtcoupan.getText().toString().trim().length() > 0)
{
couponcode=genericViewHolder.edtcoupan.getText().toString();
packid=currentItem.getCart_Product_packid();
System.out.println("Coupan Code on click"+couponcode);
goforcoupan();
}
}
});
genericViewHolder.removes.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
packid=currentItem.getCart_Product_packid();
System.out.println("PACK ID"+packid);
deletetocart();
}
});
}
@Override
public int getItemViewType (int position) {
if (isPositionHeader (position)) {
return TYPE_HEADER;
} else if(isPositionFooter (position)) {
return TYPE_FOOTER;
}
return TYPE_ITEM;
}
private boolean isPositionHeader (int position) {
return position == 0;
}
private boolean isPositionFooter (int position) {
return position == idlistData.size () + 1;
}
@Override
public int getItemCount () {
return idlistData.size () + 2;
}
class FooterViewHolder extends RecyclerView.ViewHolder {
Button FooterCheckout;
TextView txtTitleFooter;
public FooterViewHolder (View itemView) {
super (itemView);
this.txtTitleFooter = (TextView) itemView.findViewById (R.id.txtFooter);
this.FooterCheckout = (Button) itemView.findViewById (R.id.footercheckout);
}
}
class HeaderViewHolder extends RecyclerView.ViewHolder {
TextView txtTitleHeader;
public HeaderViewHolder (View itemView) {
super (itemView);
this.txtTitleHeader = (TextView) itemView.findViewById (R.id.txtHeader);
}
}
class GenericViewHolder extends RecyclerView.ViewHolder {
TextView discounttext;
LinearLayout lindiscount;
EditText edtcoupan;
TextView txtName,buynowprice,buynowqtys,buynowfreq,gocoupan,removes,firsttxt,thirdtxt;
public ImageView proimage;
public RelativeLayout linfreq,linqty;
public GenericViewHolder (View itemView) {
super (itemView);
this.txtName = (TextView) itemView.findViewById (R.id.listitem_buynow_title);
this.proimage = (ImageView)itemView.findViewById(R.id.listitem_buynow_image);
this.buynowprice = (TextView)itemView.findViewById(R.id.listitem_buynow_price);
this.buynowqtys = (TextView)itemView.findViewById(R.id.listitem_buynow_qtys);
this.buynowfreq = (TextView)itemView.findViewById(R.id.listitem_buynow_freq);
this.gocoupan = (TextView)itemView.findViewById(R.id.listitem_buynow_gocoupan);
this.edtcoupan = (EditText)itemView.findViewById(R.id.listitem_buynow_coupan);
this.removes = (TextView)itemView.findViewById(R.id.listitem_buynow_remove);
this.linfreq = (RelativeLayout)itemView.findViewById(R.id.linfreq);
this.linqty = (RelativeLayout)itemView.findViewById(R.id.linqty);
this.lindiscount = (LinearLayout)itemView.findViewById(R.id.coupancodeavailable);
this.discounttext = (TextView)itemView.findViewById(R.id.listitem_buynow_discountstring);
this.firsttxt = (TextView)itemView.findViewById(R.id.firsttext);
this.thirdtxt = (TextView)itemView.findViewById(R.id.thirdtext);
}
}
}
deletetocart
JsonArrayRequest request = new JsonArrayRequest(Request.Method.POST, addtocarturl, new JSONObject(params),
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
System.out.println("response -->> " + response.toString());
cartlist=new ArrayList<CartModel>();
try {
for (int i = 0; i < response.length(); i++) {
JSONObject person = (JSONObject) response
.get(i);
System.out.println("person"+person);
String responsecode = person.getString("subTotal");
System.out.println("subtot"+responsecode);
System.out.println("person"+person);
if(person.getString("responseCode").equals("1"))
{
JSONArray itemslist=person.optJSONArray("itemList");
if(itemslist==null)
{
Toast.makeText(BuyNowActivity.this, "Your Shopping Cart is Empty", Toast.LENGTH_SHORT).show();
}
else {
for (int j = 0; j < itemslist.length(); j++) {
JSONObject cartitems = itemslist.getJSONObject(j);
CartModel cvm = new CartModel();
cvm.setCart_Product_Name(cartitems.getString("prodNarration"));
cvm.setCart_Product_Price(cartitems.getString("finalPrice"));
cvm.setCart_Product_Id(cartitems.getString("productId"));
cvm.setCart_Product_Img(cartitems.getString("packLink"));
cvm.setCart_Product_Qty(cartitems.getString("qty"));
cvm.setCart_Product_packDiscount(cartitems.getString("packDIscDesc"));
cartlist.add(cvm);
}
Toast.makeText(BuyNowActivity.this, "Product Removed Successfully", Toast.LENGTH_SHORT).show();
}
}
else {
System.out.println("something wrong");
}
rcAdapter = new HeaderFooterAdapter(BuyNowActivity.this,cartlist);
rView.setAdapter(rcAdapter);
}
回答1:
This is just a guess but you are not parsing your packId while re initializing your list after deleting one item.
if(person.getString("responseCode").equals("1"))
{
JSONArray itemslist=person.optJSONArray("itemList");
if(itemslist==null)
{
Toast.makeText(BuyNowActivity.this, "Your Shopping Cart is Empty", Toast.LENGTH_SHORT).show();
}
else {
for (int j = 0; j < itemslist.length(); j++) {
JSONObject cartitems = itemslist.getJSONObject(j);
CartModel cvm = new CartModel();
cvm.setCart_Product_Name(cartitems.getString("prodNarration"));
cvm.setCart_Product_Price(cartitems.getString("finalPrice"));
cvm.setCart_Product_Id(cartitems.getString("productId"));
cvm.setCart_Product_Img(cartitems.getString("packLink"));
cvm.setCart_Product_Qty(cartitems.getString("qty"));
cvm.setCart_Product_packDiscount(cartitems.getString("packDIscDesc"));
// HERE add some code for parsing packId
cartlist.add(cvm);
}
Toast.makeText(BuyNowActivity.this, "Product Removed Successfully", Toast.LENGTH_SHORT).show();
}
}
Try adding the parsing code where i have added comment.
Hope this will help you.
来源：https://stackoverflow.com/questions/38222410/recyclerview-with-footer-not-able-to-delete-last-item