Set height of DropdownButtonFormField list

I was checking the code of DropDown and there is no property to set the height of the Dialog, it just fill almost the screen.

I made a small change to the class and you can include to your project if you want:

https://gist.github.com/tudor07/9f886102f3cb2f69314e159ea10572e1

Usage

1- Add the file into your project.

2- Import the file with an alias to avoid conflicts.

 import 'custom_dropdown.dart' as custom;

3- Use the alias in your Widgets related to the DropDown, and add the height property:

    Scaffold(
      appBar: AppBar(title: Text(widget.title)),
      body: Container(
          padding: EdgeInsets.fromLTRB(5, 5, 5, 5),
          child: Form(
            child: ListView(
              scrollDirection: Axis.vertical,
              children: <Widget>[
                //other widgets here
                custom.DropdownButtonFormField(
                height: 200.0,
                items: this.dropDownItems),
              ],
            ),
          )),
    );

4- Don't forget to add the alias also in your DropdownMenuItem like this :

 custom.DropdownMenuItem(
                child: Text("Sample Tex"),
                value: "any_value",
              ),

with this lines you can use DropdownButtonFormFieldlike a cheaps:

isDense: false,
itemHeight: 60,//what you need for height

so your code will be this :

Scaffold(
  appBar: AppBar(title: Text(widget.title)),
  body: Container(
      padding: EdgeInsets.fromLTRB(5, 5, 5, 5),
      child: Form(
        child: ListView(
          scrollDirection: Axis.vertical,
          children: <Widget>[
            //other widgets here
            DropdownButtonFormField(items: this.dropDownItems
               isDense: false,
               itemHeight: 60,//what you need for height
           ),
          ],
        ),
      )),
);