Comment ajouter des éléments de support listview sélectionnés dans hashmap

Question

Il y a plusieurs éléments dans listview. Je suis confus sur la façon d'ajouter des éléments de liste listview sélectionnés dans hashmap, puis envoyer le type Arraylist of Hashmap à une autre activité de panier. Voici mon code:

Shopping_list.java

class ListViewAdapter extends BaseAdapter { 
    Context mContext; 
    LayoutInflater inflater; 
    private List<ShoppingData> datalist = null; 
    private ArrayList<ShoppingData> arraylist; 




    public ListViewAdapter(Context context, List<ShoppingData> worldpopulationlist) { 
     mContext = context; 

     this.datalist = worldpopulationlist; 
     inflater = LayoutInflater.from(mContext); 
     this.arraylist = new ArrayList<ShoppingData>(); 
     this.arraylist.addAll(worldpopulationlist); 
    } 

    public class ViewHolder { 
     ImageView icon; 
     TextView title,price; 
     EditText quantity; 
     Button add,remove; 

    } 

    @Override 
    public int getCount() { 
     return datalist.size(); 

    } 

    @Override 
    public Object getItem(int position) { 
     return datalist.get(position); 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    @Override 
    public View getView(final int position, View view, ViewGroup parent) { 

     imgUrl="http://www.domainname.com/images/Product/medium/"; 
     final ViewHolder holder; 

     holder = new ViewHolder(); 


     view=inflater.inflate(R.layout.shopping_list_item,null); 

     holder.icon=(ImageView)view.findViewById(R.id.image_shooping); 
     holder.title=(TextView)view.findViewById(R.id.text_shopping); 
     holder.price=(TextView)view.findViewById(R.id.price_shopping); 
     holder.quantity=(EditText)view.findViewById(R.id.item_cart); 
     holder.add=(Button)view.findViewById(R.id.add_cart); 
     holder.remove=(Button)view.findViewById(R.id.remove_item); 


     holder.title.setText(datalist.get(position).getName()); 
     holder.price.setText("Price :"+datalist.get(position).getAmt()+" Rs"); 

     Glide 
       .with(mContext) 
       .load(imgUrl+datalist.get(position).getImg()) 
       .into(holder.icon); 

     holder.remove.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 

       for(int i=0;i<contents.size();i++) 
       { 
        HashMap<String,String>map=new HashMap<String, String>(i); 
        map.remove("name"); 
        map.remove("Amount"); 
        map.remove("image"); 
        map.remove("quantity"); 
        map.remove("total"); 
        map.remove("tax"); 
        map.remove("discount"); 
        map.remove("productId"); 
        map.remove("bv"); 
        map.remove("pv"); 

        contents.set(i,map); 
        contents.remove(map); 

        Toast.makeText(Shopping_list.this, datalist.get(position).getName() + "Succesfully Removed ", Toast.LENGTH_SHORT).show(); 


        holder.add.setVisibility(View.VISIBLE); 
        holder.remove.setVisibility(View.INVISIBLE); 
        holder.quantity.setText(""); 
        holder.add.setText("Add to cart"); 

       } 
      } 
     }); 


     holder.add.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 


       holder.quantity.setVisibility(View.VISIBLE); 


         if(holder.quantity.getText().toString().compareTo("")==0) 
       { 

        Toast.makeText(Shopping_list.this, " Enter Valid Quantity", Toast.LENGTH_SHORT).show(); 

       } 
       else { 
          for (int i = 0; i < datalist.size() ; i++) { 
           HashMap<String, String> map = new HashMap<String, String>(i); 

           float netAmount = Float.parseFloat(datalist.get(position).getAmt()) * Float.parseFloat(holder.quantity.getText().toString()); 
           String net = String.valueOf(netAmount); 

           map.put("name", datalist.get(position).getName()); 
           map.put("Amount", datalist.get(position).getAmt()); 
           map.put("image", imgUrl + datalist.get(position).getImg()); 
           map.put("quantity", holder.quantity.getText().toString()); 
           map.put("total", net); 
           map.put("tax",datalist.get(position).getTax()); 
           map.put("discount",datalist.get(position).getDiscount()); 
           map.put("productId",datalist.get(position).getProductId()); 
           map.put("bv",datalist.get(position).getBv()); 
           map.put("pv",datalist.get(position).getPv()); 

           Toast.makeText(Shopping_list.this, datalist.get(position).getName() + " Succesfully Added to cart", Toast.LENGTH_SHORT).show(); 

           holder.add.setText("Added"); 
           holder.remove.setVisibility(View.VISIBLE); 

           contents.add(map); 
           System.out.println("haspmap" + contents); 
           System.out.println("contents size"+contents.size()); 



          } 


         } 
      } 
     }); 

     return view; 
    } 

} 

public class ShoppingData { 
    private String name; 

    private String amt; 
    private String img; 
    private String tax; 
    private String discount; 
    private String productId; 
    private String bv; 
    private String pv; 


    public ShoppingData(String nm, String amt ,String img,String tax,String discount,String productId,String bv,String pv) { 
     this.name = nm; 

     this.amt = amt; 

     this.img=img; 
     this.tax=tax; 
     this.discount=discount; 
     this.productId=productId; 
     this.bv=bv; 
     this.pv=pv; 

    } 

    public String getName() { 
     return this.name; 
    } 
    public String getAmt() { 
     return this.amt; 
    } 
    public String getImg() 
    { 
     return this.img; 
    } 
    public String getTax() 
    { 
     return this.tax; 
    } 

    public String getDiscount() 
    { 
     return this.discount; 
    } 

    public String getProductId() 
    { 
     return this.productId; 
    } 
    public String getBv() 
    { 
     return this.bv; 
    } 
    public String getPv() 
    { 
     return this.pv; 
    } 

} 

Ma question est: que dois-je appliquer le bouton holder.add clickListener de telle sorte que la position sélectionnée sera ajoutée dans hashmap?

Answer 1

Ce que vous pouvez faire est d'ajouter simplement des données à l'objet de classe ShoppingData plutôt hashmap et passer ensuite cet objet à une autre activité de lecture this example il vous apprendra comment passer Object d'une activité à une autre.
EDIT:
de vous pouvez créer une carte de hachage comme Map<String , ShoppingData> sera facile à ajouter envoyer et supprimer!