ProgressDialogNormalEx.dart

import 'package:flutter/material.dart';
import 'package:progress_dialog/progress_dialog.dart';

ProgressDialog pr;

void main() {
  runApp(MaterialApp(
    home: MyApp(),
  ));
}

class MyApp extends StatelessWidget {
  double percentage = 0.0;
  @override
  Widget build(BuildContext context) {
    pr = new ProgressDialog(context,type: ProgressDialogType.Normal);
    pr.style(message: 'Showing some progress...');
    
    //Optional
    pr.style(
          message: 'Please wait...',
          borderRadius: 10.0,
          backgroundColor: Colors.white,
          progressWidget: CircularProgressIndicator(),
          elevation: 10.0,
          insetAnimCurve: Curves.easeInOut,
          progressTextStyle: TextStyle(
              color: Colors.black, fontSize: 13.0, fontWeight: FontWeight.w400),
          messageTextStyle: TextStyle(
              color: Colors.black, fontSize: 19.0, fontWeight: FontWeight.w600),
        );    
    return Scaffold(
      body: Center(
        child: RaisedButton(
            child: Text(
              'Show Dialog',
              style: TextStyle(color: Colors.white),
            ),
            color: Colors.blue,
            onPressed: () {
              pr.show();
              
              Future.delayed(Duration(seconds: 10)).then((onValue){
                print("PR status  ${pr.isShowing()}" );
                if(pr.isShowing())
                  pr.hide().then((isHidden) {
                    print(isHidden);
                  });
                print("PR status  ${pr.isShowing()}" );
              });
            }),
      ),
    );
  }
}