permission.dart

import 'package:permission_handler/permission_handler.dart';

 () async {
  PermissionStatus p = await PermissionHandler()
      .checkPermissionStatus(PermissionGroup.contacts);

  if (p == PermissionStatus.disabled) {
    // permission got already / success
    return true;
  }

  Map<PermissionGroup, PermissionStatus> ps =
      await PermissionHandler()
          .requestPermissions([PermissionGroup.contacts]);

  PermissionStatus q = ps[PermissionGroup.contacts];

  if (q == PermissionStatus.granted) {
    // permission granted
    // do the stuff
    return true;
  }
  
   if (q == PermissionStatus.denied) {
    // permission denied
    // don't do the stuff
    return false;
  }

  if (q == PermissionStatus.neverAskAgain) {
    // user restricted the permission
    return false;
    // below code to open current app settings  if u wish ...
    // await PermissionHandler().openAppSettings();   
  }
},