How to pass data in flutter

Question

How to pass data from php to get information, i try calling it but it show null in Flutter. First, I have a database and have code and also have php file to get infomation. I am using inkscape to create a barcode to scan it.

For example , I create barcode that contain 'P002',and databse also have the code. But i scan from it ,they show null in debug console Flutter.

This example from flutter ,i try to call

Future<Product> getProduct()async{
    await http.get("https://smileylion.com/easyshopping/php/getproduct.php?code=${widget.code}",)
        .then((response){
          if(jsonDecode(response.body)!=null){
            setState(() {
           product = Product.fromJson(jsonDecode(response.body));
            });
            
          }
    });
    return product;
  }

My questions ,how to pass the data and not show null ?

Answer 1

Is the API you use public? If that is the case, try consuming the endpoint you mentioned:

https://smileylion.com/easyshopping/php/getproduct.php?code=POO2

and this returns null, therefore it is a problem of the backend (database or services) not of flutter.