如何计算自定义列表视图中的产品总价格

Question

如何计算自定义列表视图中的最终产品数量。在我的程序中它只需要最后一项并执行并且只显示最后一项乘法。请解决我的问题。我是android的新手。

  

适配器代码

public class ProductAdapter extends BaseAdapter
    {
        ArrayList<Product> productdata;
        ArrayList<Product> itemprice;
        private LayoutInflater inflater;
        Context c;
        public ProductAdapter(Context context, ArrayList<Product> templist, ArrayList<Product> price) {//  super(context,templist);
            this.productdata=templist;
            this.c=context;
            this.inflater = LayoutInflater.from(context);
            this.itemprice=price;
        }

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

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

        @Override
        public long getItemId(int position) {
            return position;
        }
        class ViewHolder {
            TextView tv_qty,tv_row_product_name,tv_row_product_rate,tv_row_product_qty,tv_totalprice,tv_value ;
            ImageView imageView;
            ImageButton imgbtnp, imgbtnm;
            Button button_Chk;
        }
        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            final ViewHolder viewHolder;
            View view = convertView;
            if (view == null) {
                view = inflater.inflate(R.layout.product_row, null);
                viewHolder = new ViewHolder();
                viewHolder.tv_row_product_name = (TextView) view.findViewById(R.id.pname);
                viewHolder.tv_row_product_rate = (TextView) view.findViewById(R.id.price);
                viewHolder.tv_row_product_qty = (TextView) view.findViewById(R.id.productqty);
                viewHolder.tv_qty = (TextView) view.findViewById(R.id.userqty);
                viewHolder.imgbtnp = (ImageButton) view.findViewById(R.id.imageButton2);
                viewHolder.imgbtnm = (ImageButton) view.findViewById(R.id.imageButton);
                viewHolder.button_Chk = (Button) view.findViewById(R.id.btn_chkout);
                viewHolder.tv_value = (TextView) findViewById(R.id.textView_value);
                viewHolder.tv_totalprice = (TextView) findViewById(R.id.textview_totalprice);
                viewHolder.imageView = (ImageView) view.findViewById(R.id.imageView);
                view.setTag(viewHolder);

            } else {
                viewHolder = (ViewHolder) view.getTag();
            }

            Product pp = productdata.get(position);
            Log.d(Config.tag, "url : " + "uploads/product/" + pp.getProductUrl());

            Picasso.with(this.c)
                    .load("http://www.sureshkirana.com/uploads/product/" + pp.getProductUrl())
                    .placeholder(R.drawable.ic_launcher)
                    .into(viewHolder.imageView);

            viewHolder.tv_row_product_name.setText(pp.getProductName());
            viewHolder.tv_row_product_rate.setText("Rs. " + pp.getProductPrice() + "/-");
            viewHolder.tv_row_product_qty.setText(pp.getProductQty() + "kg");




            viewHolder.imgbtnp.setOnClickListener(new View.OnClickListener() {
                Product pp = productdata.get(position);
                @Override
                public void onClick(View v) {
                    if (pp.getUserQty() < 10)
                        pp.setUserQty(pp.getUserQty() + 1);// incrementing item quantity by 1
                    productdata.set(position, pp);// updating the itemList to that new item with incremented quantity
                    viewHolder.tv_qty.setText(String.valueOf(pp.getUserQty()));
                    ProductAdapter.this.notifyDataSetChanged();
                }
            });

            viewHolder.imgbtnm.setOnClickListener(new View.OnClickListener() {
                Product pp = productdata.get(position);
                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    if (pp.getUserQty() > 0)
                        pp.setUserQty(pp.getUserQty() - 1);// incrementing item quantity by 1
                    productdata.set(position, pp);// updating the itemList to that new item with incremented quantity
                    viewHolder.tv_qty.setText(String.valueOf(pp.getUserQty()));
                    ProductAdapter.this.notifyDataSetChanged();
                }
            });

            int finalamount =0;
            for (int temp1 = 0; temp1 < itemprice.size(); temp1++)
            pp = itemprice.get(temp1);
            {
                pp.setProductSalePrice(pp.getProductPrice() * pp.getUserQty());
                finalamount += pp.getProductSalePrice();
                viewHolder.tv_totalprice.setText("Rs."+finalamount);
            }
            Log.d(Config.tag, "Total Price is:" + finalamount);
            ProductAdapter.this.notifyDataSetChanged();
          return view;
    }
 }

}

Answer 1

public class ProductAdapter extends BaseAdapter
    {
        ArrayList<Product> productdata;
        ArrayList<Product> itemprice;
        private LayoutInflater inflater;
        Context c;
        public ProductAdapter(Context context, ArrayList<Product> templist, ArrayList<Product> price) {//  super(context,templist);
            this.productdata=templist;
            this.c=context;
            this.inflater = LayoutInflater.from(context);
            this.itemprice=price;
        }

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

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

        @Override
        public long getItemId(int position) {
            return position;
        }
        class ViewHolder {
            TextView tv_qty,tv_row_product_name,tv_row_product_rate,tv_row_product_qty,tv_totalprice,tv_value ;
            ImageView imageView;
            ImageButton imgbtnp, imgbtnm;
            Button button_Chk;
        }
        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            final ViewHolder viewHolder;
            View view = convertView;
            if (view == null) {
                view = inflater.inflate(R.layout.product_row, null);
                viewHolder = new ViewHolder();
                viewHolder.tv_row_product_name = (TextView) view.findViewById(R.id.pname);
                viewHolder.tv_row_product_rate = (TextView) view.findViewById(R.id.price);
                viewHolder.tv_row_product_qty = (TextView) view.findViewById(R.id.productqty);
                viewHolder.tv_qty = (TextView) view.findViewById(R.id.userqty);
                viewHolder.imgbtnp = (ImageButton) view.findViewById(R.id.imageButton2);
                viewHolder.imgbtnm = (ImageButton) view.findViewById(R.id.imageButton);
                viewHolder.button_Chk = (Button) view.findViewById(R.id.btn_chkout);
                viewHolder.tv_value = (TextView) findViewById(R.id.textView_value);
                viewHolder.tv_totalprice = (TextView) findViewById(R.id.textview_totalprice);
                viewHolder.imageView = (ImageView) view.findViewById(R.id.imageView);
                view.setTag(viewHolder);

            } else {
                viewHolder = (ViewHolder) view.getTag();
            }

            Product pp = productdata.get(position);
            Log.d(Config.tag, "url : " + "uploads/product/" + pp.getProductUrl());

            Picasso.with(this.c)
                    .load("http://www.sureshkirana.com/uploads/product/" + pp.getProductUrl())
                    .placeholder(R.drawable.ic_launcher)
                    .into(viewHolder.imageView);

            viewHolder.tv_row_product_name.setText(pp.getProductName());
            viewHolder.tv_row_product_rate.setText("Rs. " + pp.getProductPrice() + "/-");
            viewHolder.tv_row_product_qty.setText(pp.getProductQty() + "kg");




            viewHolder.imgbtnp.setOnClickListener(new PlusButtonListener(position,pp,viewHolder.tv_totalprice));

            viewHolder.imgbtnm.setOnClickListener(new MinusButtonListener(position,pp,viewHolder.tv_totalprice));

            int finalamount =0;
            for (int temp1 = 0; temp1 < itemprice.size(); temp1++)
            pp = itemprice.get(temp1);
            {
                pp.setProductSalePrice(pp.getProductPrice() * pp.getUserQty());
                finalamount += pp.getProductSalePrice();
                viewHolder.tv_totalprice.setText("Rs."+finalamount);
            }
            Log.d(Config.tag, "Total Price is:" + finalamount);
            ProductAdapter.this.notifyDataSetChanged();

            }

            class PlusButtonListener implements OnClickListener {
        private int position;
        Product data;
TextView totalTextView;
        Listener(int position,Product data,TextView totalTextView) {
            this.position = position;
    this.totalTextView=totalTextView;
            this.data = data;
        }

        @SuppressLint("UseValueOf")
        @Override
        public void onClick(View v) {
         if (data.getUserQty() < 10)
         {
                        data.setUserQty(data.getUserQty() + 1);// incrementing item quantity by 1

                    totalTextView.setText(String.valueOf(data.getUserQty()));
                    data.setProductSalePrice(data.getProductPrice() * data.getUserQty());

                viewHolder.tv_totalprice.setText("Rs."+data.getProductSalePrice());
            }
        }
    }
        class MinusButtonListener implements OnClickListener {
        private int position;
        Product data;
TextView totalTextView;
        Listener(int position,Product data,TextView totalTextView) {
            this.position = position;
    this.totalTextView=totalTextView;
            this.data = data;
        }

        @SuppressLint("UseValueOf")
        @Override
        public void onClick(View v) {
          if (data.getUserQty() > 0)
          {
                        data.setUserQty(data.getUserQty() - 1);// incrementing item quantity by 1

                 totalTextView.setText(String.valueOf(data.getUserQty()));

                data.setProductSalePrice(data.getProductPrice() * data.getUserQty());

                viewHolder.tv_totalprice.setText("Rs."+data.getProductSalePrice());
            }
           }       

        }
    }
        public class ProductAdapter extends BaseAdapter
        {
            ArrayList<Product> productdata;
            ArrayList<Product> itemprice;
            private LayoutInflater inflater;
            Context c;
            public ProductAdapter(Context context, ArrayList<Product> templist, ArrayList<Product> price) {//  super(context,templist);
                this.productdata=templist;
                this.c=context;
                this.inflater = LayoutInflater.from(context);
                this.itemprice=price;
            }

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

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

            @Override
            public long getItemId(int position) {
                return position;
            }
            class ViewHolder {
                TextView tv_qty,tv_row_product_name,tv_row_product_rate,tv_row_product_qty,tv_totalprice,tv_value ;
                ImageView imageView;
                ImageButton imgbtnp, imgbtnm;
                Button button_Chk;
            }
            @Override
            public View getView(final int position, View convertView, ViewGroup parent) {
                final ViewHolder viewHolder;
                View view = convertView;
                if (view == null) {
                    view = inflater.inflate(R.layout.product_row, null);
                    viewHolder = new ViewHolder();
                    viewHolder.tv_row_product_name = (TextView) view.findViewById(R.id.pname);
                    viewHolder.tv_row_product_rate = (TextView) view.findViewById(R.id.price);
                    viewHolder.tv_row_product_qty = (TextView) view.findViewById(R.id.productqty);
                    viewHolder.tv_qty = (TextView) view.findViewById(R.id.userqty);
                    viewHolder.imgbtnp = (ImageButton) view.findViewById(R.id.imageButton2);
                    viewHolder.imgbtnm = (ImageButton) view.findViewById(R.id.imageButton);
                    viewHolder.button_Chk = (Button) view.findViewById(R.id.btn_chkout);
                    viewHolder.tv_value = (TextView) findViewById(R.id.textView_value);
                    viewHolder.tv_totalprice = (TextView) findViewById(R.id.textview_totalprice);
                    viewHolder.imageView = (ImageView) view.findViewById(R.id.imageView);
                    view.setTag(viewHolder);

                } else {
                    viewHolder = (ViewHolder) view.getTag();
                }

                Product pp = productdata.get(position);
                Log.d(Config.tag, "url : " + "uploads/product/" + pp.getProductUrl());

                Picasso.with(this.c)
                        .load("http://www.sureshkirana.com/uploads/product/" + pp.getProductUrl())
                        .placeholder(R.drawable.ic_launcher)
                        .into(viewHolder.imageView);

                viewHolder.tv_row_product_name.setText(pp.getProductName());
                viewHolder.tv_row_product_rate.setText("Rs. " + pp.getProductPrice() + "/-");
                viewHolder.tv_row_product_qty.setText(pp.getProductQty() + "kg");




                viewHolder.imgbtnp.setOnClickListener(new PlusButtonListener(position,pp,viewHolder.tv_totalprice));

                viewHolder.imgbtnm.setOnClickListener(new MinusButtonListener(position,pp,viewHolder.tv_totalprice));

                int finalamount =0;
                for (int temp1 = 0; temp1 < itemprice.size(); temp1++)
                pp = itemprice.get(temp1);
                {
                    pp.setProductSalePrice(pp.getProductPrice() * pp.getUserQty());
                    finalamount += pp.getProductSalePrice();
                    viewHolder.tv_totalprice.setText("Rs."+finalamount);
                }
                Log.d(Config.tag, "Total Price is:" + finalamount);
                ProductAdapter.this.notifyDataSetChanged();

                }

                class PlusButtonListener implements OnClickListener {
            private int position;
            Product data;
    TextView totalTextView;
            Listener(int position,Product data,TextView totalTextView) {
                this.position = position;
        this.totalTextView=totalTextView;
                this.data = data;
            }

            @SuppressLint("UseValueOf")
            @Override
            public void onClick(View v) {
             if (data.getUserQty() < 10)
             {
                            data.setUserQty(data.getUserQty() + 1);// incrementing item quantity by 1

                        totalTextView.setText(String.valueOf(data.getUserQty()));
                         for (int temp1 = 0; temp1 < itemprice.size(); temp1++)
                pp = itemprice.get(temp1);
                {
                    pp.setProductSalePrice(pp.getProductPrice() * pp.getUserQty());
                    finalamount += pp.getProductSalePrice();
                    viewHolder.tv_totalprice.setText("Rs."+finalamount);
                }
                }
            }
        }
            class MinusButtonListener implements OnClickListener {
            private int position;
            Product data;
    TextView totalTextView;
            Listener(int position,Product data,TextView totalTextView) {
                this.position = position;
        this.totalTextView=totalTextView;
                this.data = data;
            }

            @SuppressLint("UseValueOf")
            @Override
            public void onClick(View v) {
              if (data.getUserQty() > 0)
              {
                            data.setUserQty(data.getUserQty() - 1);// incrementing item quantity by 1

                     totalTextView.setText(String.valueOf(data.getUserQty()));
                      for (int temp1 = 0; temp1 < itemprice.size(); temp1++)
                pp = itemprice.get(temp1);
                {
                    pp.setProductSalePrice(pp.getProductPrice() * pp.getUserQty());
                    finalamount += pp.getProductSalePrice();
                    viewHolder.tv_totalprice.setText("Rs."+finalamount);
                }
               }       

            }
        }