MAUI: Save contact to device

Question

I am trying to save a phone number to the local device in MAUI by Conditional Compilation.

Below is my code:

#if ANDROID

using Android.App;
using Android.Content;
using Android.OS;
using Android.Provider;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using MyApp.Droid.Service;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

#elif IOS

using AddressBook;
using Foundation;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using UIKit;
using MyApp.iOS.Services;

#endif

namespace MyApp.Renderers
{
    public class SaveContact
    {
        public void SaveContactToPhoneBook(string Name, string Number, string Email)
        {
#if ANDROID
            var activity = Android.App.Application.Context as Activity;
            var intent = new Intent(Intent.ActionInsert).SetFlags(ActivityFlags.ClearTask);
            intent.SetType(ContactsContract.Contacts.ContentType);
            intent.PutExtra(ContactsContract.Intents.Insert.Name, Name);
            intent.PutExtra(ContactsContract.Intents.Insert.Phone, Number);
            intent.PutExtra(ContactsContract.Intents.Insert.Email, Email);
            activity.StartActivity(intent);
#elif IOS
            ABAddressBook ab = new ABAddressBook();
            ABPerson p = new ABPerson();
            p.FirstName = Name;
            ABMutableMultiValue<string> phones = new ABMutableStringMultiValue();
            phones.Add(Number, ABPersonPhoneLabel.Mobile);
            p.SetPhones(phones);
            ABMutableDictionaryMultiValue addresses = new ABMutableDictionaryMultiValue();
            NSMutableDictionary a = new NSMutableDictionary();
            addresses.Add(a, new NSString("Home"));
            p.SetAddresses(addresses);
            ab.Add(p);
            ab.Save();
#endif
        }
    }
}

Then from my contacts save page:

SaveContact saveContact = new SaveContact();
saveContact.SaveContactToPhoneBook("", phone, "");//passing name, phone and email

I am getting exception for this from both Android and iOS platforms.

Android Exception:

System.NullReferenceException: Object reference not set to an instance of an object. at MyProject.Renderers.SaveContact.SaveContactToPhoneBook(String Name, String Number, String Email) in E:\My Projects\MAUI\MyProject-maui\MyProject\Renderers\SaveContact.cs:line 43 [SurfaceComposerClient] XDR setRegion is not supported 0xb4000075d1bc0cf0, 1, 0

iOS Exception:

CoreFoundation.CFException: The operation couldn’t be completed. (ABAddressBookErrorDomain error 1.) at AddressBook.ABAddressBook.Add(ABRecord ) at MyProject.Renderers.SaveContact.SaveContactToPhoneBook(String Name, String Number, String Email) in /Users/MyCompany/Projects/MyProject-maui/MyProject/Renderers/SaveContact.cs:line 55

The codes I have used are from Xamarin Forms Dependency Service and I changed it to Conditional Compilation for MAUI integration.

Answer 1

Hello,

For Android, please use var activity = Microsoft.Maui.ApplicationModel.Platform.CurrentActivity; to replace var activity = Android.App.Application.Context as Activity;

For iOS, ABAddressBook is deprecated, you can use CNMutableContact to do it

You can refer to the detailed code from contact-objects, this is a Xamarin.iOS document, but it works in the MAUI Conditional Compilation as well.

As note: Your app's Info.plist must contain an NSContactsUsageDescription key with a string value explaining to the user how the app uses this data.

Best Regards,

Leon Lu

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