小编moh*_*bil的帖子

我想从警报对话框传递数据。警报对话框包含文本字段，因此无论用户在文本字段上输入什么内容，文本都应该传递到主页（屏幕）。下面是警报对话框的代码

    Padding(
                          padding: const EdgeInsets.only(left: 42.0),
                          child: Align(
                            alignment: Alignment.topCenter,
                            child: RaisedButton(onPressed: (){
                                _showDialog();
                            },
                          ),
                        ),

Padding(
                padding: const EdgeInsets.only(top: 50.0),
                  child: new Text('// Displays text'););

    void _showDialog() {
        showDialog(
          context: context,
          builder: (BuildContext context) {
            // return object of type Dialog
            return AlertDialog(
              title: new Text("Alert Dialog title"),
              content: TextField(
                keyboardType: TextInputType.number,
                decoration: InputDecoration(
                    hintText: 'Enter the number'
                ),
              )
              ,
              actions: <Widget>[
                // usually buttons at the bottom of the dialog
                Row(
                  children: <Widget>[
                   new FlatButton(
                   child: …