Add Contacts Doesn't Work

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Hi @lukasgit please help!

I don't know who else to go to
but add contacts doesn't work anymore

I get this error
"Exception has occurred.
FormatException (FormatException: Invalid envelope)"
in the main console window

and this in the debug output

I'm using VS Code and a modified version of your example file
the modified version uses a plugin that actually works

its the permission plugin

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

import 'package:contacts_service/contacts_service.dart';
import 'package:not_at_home/helper.dart';
import 'package:permission/permission.dart';
import 'package:permission/permission.dart';

void main() => runApp(ContactsExampleApp());

class ContactsExampleApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: ContactListPage(),
      routes: <String, WidgetBuilder>{
        '/add': (BuildContext context) => AddContactPage()
      },
    );
  }
}

class ContactListPage extends StatefulWidget {
  @override
  _ContactListPageState createState() => _ContactListPageState();
}

class _ContactListPageState extends State<ContactListPage> {
  Iterable<Contact> _contacts;

  @override
  initState() {
    super.initState();
    refreshContacts();
  }

  refreshContacts() async {
    PermissionStatus permissionStatus = await _getContactPermission();
    if (isAuthorized(permissionStatus)) {
      var contacts = await ContactsService.getContacts();
//      var contacts = await ContactsService.getContactsForPhone("8554964652");
      setState(() {
        _contacts = contacts;
      });
    } else {
      _handleInvalidPermissions(permissionStatus);
    }
  }

  updateContact() async {
    Contact ninja = _contacts.toList().firstWhere((contact) => contact.familyName.startsWith("Ninja"));
    ninja.avatar = null;
    await ContactsService.updateContact(ninja);

    refreshContacts();
  }
  
  Future<PermissionStatus> _getContactPermission() async {
    PermissionStatus permission = (await Permission.getPermissionsStatus([PermissionName.Contacts]))[0].permissionStatus;
    if (isAuthorized(permission) == false) {
      PermissionStatus permissionStatus = (await Permission.requestPermissions([PermissionName.Contacts]))[0].permissionStatus;
      return permissionStatus;
    } else {
      return permission;
    }
  }

  void _handleInvalidPermissions(PermissionStatus permissionStatus) {
    if (isAuthorized(permissionStatus) == false) {
      throw new PlatformException(
          code: "PERMISSION_DENIED",
          message: "Access to location data denied",
          details: null);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Contacts Plugin Example')),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.add),
        onPressed: () {
          Navigator.of(context).pushNamed("/add").then((_) {
            refreshContacts();
          });
        },
      ),
      body: SafeArea(
        child: _contacts != null
            ? ListView.builder(
          itemCount: _contacts?.length ?? 0,
          itemBuilder: (BuildContext context, int index) {
            Contact c = _contacts?.elementAt(index);
            return ListTile(
              onTap: () {
                Navigator.of(context).push(MaterialPageRoute(
                    builder: (BuildContext context) =>
                        ContactDetailsPage(c)));
              },
              leading: (c.avatar != null && c.avatar.length > 0)
                  ? CircleAvatar(backgroundImage: MemoryImage(c.avatar))
                  : CircleAvatar(child: Text(c.initials())),
              title: Text(c.displayName ?? ""),

            );
          },
        )
            : Center(child: CircularProgressIndicator(),),
      ),
    );
  }
}

class ContactDetailsPage extends StatelessWidget {
  ContactDetailsPage(this._contact);
  final Contact _contact;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(_contact.displayName ?? ""),
        actions: <Widget>[
//          IconButton(
//            icon: Icon(Icons.share),
//            onPressed: () => shareVCFCard(context, contact: _contact),
//          ),
          IconButton(
            icon: Icon(Icons.delete),
            onPressed: () => ContactsService.deleteContact(_contact),
          ),
          IconButton(
            icon: Icon(Icons.update),
            onPressed: () => Navigator.of(context).push(
              MaterialPageRoute(builder: (context) => UpdateContactsPage(contact: _contact,),),
            ),
          ),
        ],
      ),
      body: SafeArea(
        child: ListView(
          children: <Widget>[
            ListTile(
              title: Text("Name"),
              trailing: Text(_contact.givenName ?? ""),
            ),
            ListTile(
              title: Text("Middle name"),
              trailing: Text(_contact.middleName ?? ""),
            ),
            ListTile(
              title: Text("Family name"),
              trailing: Text(_contact.familyName ?? ""),
            ),
            ListTile(
              title: Text("Prefix"),
              trailing: Text(_contact.prefix ?? ""),
            ),
            ListTile(
              title: Text("Suffix"),
              trailing: Text(_contact.suffix ?? ""),
            ),
            ListTile(
              title: Text("Company"),
              trailing: Text(_contact.company ?? ""),
            ),
            ListTile(
              title: Text("Job"),
              trailing: Text(_contact.jobTitle ?? ""),
            ),
            ListTile(
              title: Text("Note"),
              trailing: Text(_contact.note ?? ""),
            ),
            AddressesTile(_contact.postalAddresses),
            ItemsTile("Phones", _contact.phones),
            ItemsTile("Emails", _contact.emails)
          ],
        ),
      ),
    );
  }
}

class AddressesTile extends StatelessWidget {
  AddressesTile(this._addresses);
  final Iterable<PostalAddress> _addresses;

  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        ListTile(title: Text("Addresses")),
        Column(
          children: _addresses.map((a) => Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16.0),
            child: Column(
              children: <Widget>[
                ListTile(
                  title: Text("Street"),
                  trailing: Text(a.street ?? ""),
                ),
                ListTile(
                  title: Text("Postcode"),
                  trailing: Text(a.postcode ?? ""),
                ),
                ListTile(
                  title: Text("City"),
                  trailing: Text(a.city ?? ""),
                ),
                ListTile(
                  title: Text("Region"),
                  trailing: Text(a.region ?? ""),
                ),
                ListTile(
                  title: Text("Country"),
                  trailing: Text(a.country ?? ""),
                ),
              ],
            ),
          )).toList(),
        ),
      ],
    );
  }
}

class ItemsTile extends StatelessWidget {
  ItemsTile(this._title, this._items);
  final Iterable<Item> _items;
  final String _title;

  @override
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        ListTile(title: Text(_title)),
        Column(
          children: _items.map((i) => Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16.0),
            child: ListTile(
              title: Text(i.label ?? ""),
              trailing: Text(i.value ?? ""),
            ),),
          ).toList(),
        ),
      ],
    );
  }
}

class AddContactPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => _AddContactPageState();
}

class _AddContactPageState extends State<AddContactPage> {
  Contact contact = Contact();
  PostalAddress address = PostalAddress(label: "Home");
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Add a contact"),
        actions: <Widget>[
          FlatButton(
            onPressed: () {
              _formKey.currentState.save();
              contact.postalAddresses = [address];
              ContactsService.addContact(contact);
              Navigator.of(context).pop();
            },
            child: Icon(Icons.save, color: Colors.white),
          )
        ],
      ),
      body: Container(
        padding: EdgeInsets.all(12.0),
        child: Form(
          key: _formKey,
          child: ListView(
            children: <Widget>[
              TextFormField(
                decoration: const InputDecoration(labelText: 'First name'),
                onSaved: (v) => contact.givenName = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Middle name'),
                onSaved: (v) => contact.middleName = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Last name'),
                onSaved: (v) => contact.familyName = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Prefix'),
                onSaved: (v) => contact.prefix = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Suffix'),
                onSaved: (v) => contact.suffix = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Phone'),
                onSaved: (v) => contact.phones = [Item(label: "mobile", value: v)],
                keyboardType: TextInputType.phone,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'E-mail'),
                onSaved: (v) => contact.emails = [Item(label: "work", value: v)],
                keyboardType: TextInputType.emailAddress,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Company'),
                onSaved: (v) => contact.company = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Job'),
                onSaved: (v) => contact.jobTitle = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Note'),
                onSaved: (v) => contact.note = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Street'),
                onSaved: (v) => address.street = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'City'),
                onSaved: (v) => address.city = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Region'),
                onSaved: (v) => address.region = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Postal code'),
                onSaved: (v) => address.postcode = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Country'),
                onSaved: (v) => address.country = v,
              ),
            ],
          ),
        ),
      ),
    );
  }
}

class UpdateContactsPage extends StatefulWidget {
  UpdateContactsPage({ @required this.contact });
  final Contact contact;
  @override
  _UpdateContactsPageState createState() => _UpdateContactsPageState();
}

class _UpdateContactsPageState extends State<UpdateContactsPage> {
  Contact contact;
  PostalAddress address = PostalAddress(label: "Home");
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
  @override
  void initState() {
    super.initState();
    contact = widget.contact;
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Update Contact"),
        actions: <Widget>[
          IconButton(
            icon: Icon(Icons.save, color: Colors.white,),
            onPressed: () async {
              _formKey.currentState.save();
              contact.postalAddresses = [address];
              await ContactsService.updateContact(contact).then((_) {
                Navigator.of(context).pushReplacement(MaterialPageRoute(builder: (context) => ContactListPage()));
              });
            },
          ),
        ],
      ),
      body: Container(
        padding: EdgeInsets.all(12.0),
        child: Form(
          key: _formKey,
          child: ListView(
            children: <Widget>[
              TextFormField(
                initialValue: contact.givenName ?? "",
                decoration: const InputDecoration(labelText: 'First name'),
                onSaved: (v) => contact.givenName = v,
              ),
              TextFormField(
                initialValue: contact.middleName ?? "",
                decoration: const InputDecoration(labelText: 'Middle name'),
                onSaved: (v) => contact.middleName = v,
              ),
              TextFormField(
                initialValue: contact.familyName ?? "",
                decoration: const InputDecoration(labelText: 'Last name'),
                onSaved: (v) => contact.familyName = v,
              ),
              TextFormField(
                initialValue: contact.prefix ?? "",
                decoration: const InputDecoration(labelText: 'Prefix'),
                onSaved: (v) => contact.prefix = v,
              ),
              TextFormField(
                initialValue: contact.suffix ?? "",
                decoration: const InputDecoration(labelText: 'Suffix'),
                onSaved: (v) => contact.suffix = v,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Phone'),
                onSaved: (v) => contact.phones = [Item(label: "mobile", value: v)],
                keyboardType: TextInputType.phone,
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'E-mail'),
                onSaved: (v) => contact.emails = [Item(label: "work", value: v)],
                keyboardType: TextInputType.emailAddress,
              ),
              TextFormField(
                initialValue: contact.company ?? "",
                decoration: const InputDecoration(labelText: 'Company'),
                onSaved: (v) => contact.company = v,
              ),
              TextFormField(
                initialValue: contact.jobTitle ?? "",
                decoration: const InputDecoration(labelText: 'Job'),
                onSaved: (v) => contact.jobTitle = v,
              ),
              TextFormField(
                initialValue: contact.note ?? "",
                decoration: const InputDecoration(labelText: 'Note'),
                onSaved: (v) => contact.note = v,
              ),
              TextFormField(
                initialValue: address.street ?? "",
                decoration: const InputDecoration(labelText: 'Street'),
                onSaved: (v) => address.street = v,
              ),
              TextFormField(
                initialValue: address.city ?? "",
                decoration: const InputDecoration(labelText: 'City'),
                onSaved: (v) => address.city = v,
              ),
              TextFormField(
                initialValue: address.region ?? "",
                decoration: const InputDecoration(labelText: 'Region'),
                onSaved: (v) => address.region = v,
              ),
              TextFormField(
                initialValue: address.postcode ?? "",
                decoration: const InputDecoration(labelText: 'Postal code'),
                onSaved: (v) => address.postcode = v,
              ),
              TextFormField(
                initialValue: address.country ?? "",
                decoration: const InputDecoration(labelText: 'Country'),
                onSaved: (v) => address.country = v,
              ),
            ],
          ),
        ),
      ),
    );
  }
}

[b-cancel]

the function i forgot to move over

bool isAuthorized(PermissionStatus status){
  if(status == PermissionStatus.allow) return true;
  else if(status == PermissionStatus.always) return true;
  else if(status == PermissionStatus.whenInUse) return true;
  else return false;
}

this should not be the problems since the contacts are being retreived... just allow the plugin cuz my modified code doesnt handle edge cases

Once again @lukasgit thank you so much for your help!

[b-cancel]

newest update fixed the problem

[lukasgit]

@b-cancel so that we can help others who might encounter a similar issue, was updating to the newest version all you had to do to resolve this issue?