First Android App | Step 10 | Implementing Button within Listview

In the search results, there is an option for the user to add to Cart. This has been implemented by using a Button or imageButton.

The complete view on how this can be implemented is available below.

Source Code

In Search.java, we have added a onClickListener for the button and a custom onClickListener to handle the click. 

inside getView of SearchResultsAdapter, we set up the custom listener

holder.addToCart.setOnClickListener(new MyPersonalClickListener("button_addtocart",tempProduct,context));

and then inside the SearchResultsAdapter class, add the following code to handle onClick

//this is a customized clicklistener
   public class MyPersonalClickListener implements OnClickListener
      {

       String button_name;
       Product prod_name;
       int tempQty;
       int tempValue;
       SQLiteDatabase sqLite;
       Context context;
       
       //constructor method
       public MyPersonalClickListener(String button_name, Product prod_name, Context context) 
       {
            this.prod_name = prod_name;
            this.button_name = button_name;
            this.context = context;
       }

       @Override
       public void onClick(View v)
       {
          
        // in this section, we are going to add items to cart
        //if the item is already there in cart, then increase the quantity by 1, else add the item to cart
        //if the quantity of the item has reached 10, then do nothing ---this is just a specific logic where
        //i did not want any item with quantity more than 10, but if you choose not to, then just comment out
        //the code. 
     sqLite=context.openOrCreateDatabase("basketbuddy", context.MODE_PRIVATE, null);
     
     Cursor cc = sqLite.rawQuery("SELECT PRODUCT_QTY, PRODUCT_VALUE FROM CART WHERE PRODUCT_CODE ="+Integer.parseInt(prod_name.getProductCode()), null);
     
     if (cc.getCount()== 0)
     {
           //product not already there in cart..add to cart
      sqLite.execSQL("INSERT INTO CART (PRODUCT_CODE, PRODUCT_NAME, PRODUCT_BARCODE, PRODUCT_GRAMMAGE"+
            ", PRODUCT_MRP, PRODUCT_BBPRICE, PRODUCT_DIVISION, PRODUCT_DEPARTMENT,PRODUCT_QTY,PRODUCT_VALUE) VALUES("+
           prod_name.getProductCode()+",'"+ prod_name.getProductName()+ "','" +
            prod_name.getProductBarcode()+"','"+ prod_name.getProductGrammage()+"',"+
           Integer.parseInt(prod_name.getProductMRP())+","+ Integer.parseInt(prod_name.getProductBBPrice())+","+
            Integer.parseInt(prod_name.getProductDivision())+","+Integer.parseInt(prod_name.getProductDepartment())+
            ",1,"+ Integer.parseInt(prod_name.getProductBBPrice())+")");
           
         Toast.makeText(context,"Item "+prod_name.getProductName()+" added to Cart", Toast.LENGTH_LONG).show();
     }
     else
     {
      
      //product already there in cart
      if(cc.moveToFirst())
     {
      do{
       tempQty=cc.getInt(0);
       tempValue = cc.getInt(1);
      }while(cc.moveToNext());
     }
      
      if (tempQty < 10)
      {
       sqLite.execSQL("UPDATE CART SET PRODUCT_QTY = "+ (tempQty+1)+",PRODUCT_VALUE = "+ 
     (Integer.parseInt(prod_name.getProductBBPrice())+tempValue)+" WHERE PRODUCT_CODE ="+
     prod_name.getProductCode());
       
       Toast.makeText(context,"Item "+prod_name.getProductName()+" added to Cart", Toast.LENGTH_LONG).show();
      }
     }

     sqLite.close();
              
       }

    }