自定义 DropdownButton 的弹出菜单

Question

How can you set the background color of the DropdownButton menu. I can customize the Text() items that appear but they appear within a container which I would like to change the color for.

Answer 1

Looks like dropdownColor setting handles this:

DropdownButton<String>(
  dropdownColor: Colors.blue,

 // ...
}

.. found it thanks to options offered by autocomplete

Answer 2

Something like this will work:

          DropdownMenuItem<int>(
            value: model.id,
            child: SizedBox(
              width: width,
              child: Container(
                color: Colors.green, // 
                child: Text(
                  model.toString(),
                ),
              ),
            ),
          )
        ) 

Answer 3

int _value = 0;

Widget _buildDropdown() {
  return DropdownButton(
    value: _value,
    items: [
      DropdownMenuItem(
        value: 0,
        child: Container(
          color: Colors.blue, // you need this
          child: Text("Zero"),
          width: 100,
          alignment: Alignment.center,
        ),
      ),
      DropdownMenuItem(
        value: 1,
        child: Container(
          color: Colors.green, // you need this
          child: Text("One"),
          width: 100,
          alignment: Alignment.center,
        ),
      ),
    ],
    onChanged: (value) => setState(() => _value = value),
  );
}