Change background color of ListTile upon selection in Flutter

Screenshot:

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Short answer:

ListTile(
  tileColor: isSelected ? Colors.blue : null, 
)

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Full Code:

// You can also use `Map` but for the sake of simplicity I'm using two separate `List`.
final List<int> _list = List.generate(20, (i) => i);
final List<bool> _selected = List.generate(20, (i) => false); // Fill it with false initially
  
Widget build(BuildContext context) {
  return Scaffold(
    body: ListView.builder(
      itemBuilder: (_, i) {
        return ListTile(
          tileColor: _selected[i] ? Colors.blue : null, // If current item is selected show blue color
          title: Text('Item ${_list[i]}'),
          onTap: () => setState(() => _selected[i] = !_selected[i]), // Reverse bool value
        );
      },
    ),
  );
}

I was able to change the background color of the ListTile using a BoxDecoration inside Container:

ListView (
    children: <Widget>[
        new Container (
            decoration: new BoxDecoration (
                color: Colors.red
            ),
            child: new ListTile (
                leading: const Icon(Icons.euro_symbol),
                title: Text('250,00')
            )
        )
    ]
)