Nojoom 1.0.2

Nojoom Lifestyle SDK for .NET MAUI

Official .NET MAUI bindings for the Nojoom Lifestyle SDK. A single package embeds the Nojoom offers / coupons experience into a MAUI app on both Android and iOS.

You give the SDK a session token; it renders its entire UI itself — home, offer categories, merchant listings, offer details with maps, coupons, favourites, redemption (QR / code), and contacts. Your app builds none of those screens.

One PackageReference covers both platforms.

Install

dotnet add package Nojoom --version 1.0.2

<PackageReference Include="Nojoom" Version="1.0.2" />

Requirements

• .NET 9 with the MAUI / android and ios workloads.
• Android minimum API level 24; iOS minimum 13.0.

Host-app configuration

These cannot be carried by the package and must be supplied by the consuming app.

Android — required NuGet pins (build/runtime conflict fix)

com.google.gson and a few AndroidX versions conflict with what Microsoft.Maui.Core pins. Add these to your app project or you'll hit NU1107 at build or a crash at runtime:

<ItemGroup Condition="$(TargetFramework.Contains('-android'))">
  <PackageReference Include="Xamarin.AndroidX.Lifecycle.LiveData" Version="2.10.0.2" />
  <PackageReference Include="Xamarin.AndroidX.Lifecycle.LiveData.Core" Version="2.10.0.2" />
  <PackageReference Include="Xamarin.AndroidX.SavedState.SavedState.Ktx" Version="1.4.0.2" />
</ItemGroup>

The NU1608 "version outside constraint" warnings these produce are expected and benign. (Non-MAUI Xamarin.Android hosts must also add the GoogleGson NuGet ≥ 2.10.1 — a MAUI app already provides it transitively.)

The SDK's networking stack also needs com.squareup.okio (Okio) present at runtime. Apps using Firebase Analytics/Messaging already get it transitively via Xamarin.AndroidX.DataStore.*; if yours doesn't, add Square.OkIO.JVM (≥ 3.9.0) yourself.

Android — Google Maps API key (required)

The SDK shows a Google Map on offer-detail screens. Add your key to the host AndroidManifest.xml (play-services-maps reads it from the host, never the SDK). Without it the app hard-crashes with IllegalStateException: API key not found when a map opens.

<application ...>
  <meta-data android:name="com.google.android.geo.API_KEY" android:value="YOUR_MAPS_KEY" />
</application>

Huawei devices additionally need an AppGallery Connect project (agconnect-services.json + Map Kit key) in the host app.

iOS

No extra references or pins — the native NojoomLifestyles.xcframework ships inside the package and links automatically.

Initialize & launch

The one runtime input is a session token from your own login flow. No API key or encryption keys are needed — those are embedded in the SDK. Initialization is async — only show the SDK UI after onSuccess.

Android — launch NojoomActivity

using Com.Nojoom.Lifestyles.Public;
using Microsoft.Maui.ApplicationModel;

var activity = Platform.CurrentActivity;
var intent = NojoomActivity.CreateIntent(activity, token);
activity.StartActivity(intent);   // NojoomActivity self-initializes and renders its own UI

iOS — initialize, present on success

using NojoomLifestyles;
using Microsoft.Maui.ApplicationModel;
using UIKit;

NojoomSDK.Initialize(
    token,
    onSuccess: () => MainThread.BeginInvokeOnMainThread(() =>
    {
        // Grab the app's top-most view controller to present from.
        var root = UIApplication.SharedApplication.KeyWindow?.RootViewController;
        while (root?.PresentedViewController is not null)
            root = root.PresentedViewController;

        var vc = NojoomSDK.MakeContentViewController();
        vc.ModalPresentationStyle = UIModalPresentationStyle.FullScreen;
        root?.PresentViewController(vc, animated: true, completionHandler: null);
    }),
    onError: message => { /* show error, prompt re-login */ });

Session callbacks (optional, both platforms)

Three optional callbacks: session-expired, token-refresh, offer-redeemed.

Register them before launching NojoomActivity:

NojoomActivity.SetOnOfferRedeemed(new RedeemListener(token => { /* forward token to backend */ }));
NojoomActivity.SetOnRefreshToken(new RefreshTokenListener(async () => await GetFreshTokenAsync()));

RedeemListener and RefreshTokenListener are small adapter classes you add to your app — each wraps a C# delegate in the SDK's Java interface and must extend Java.Lang.Object to cross the JNI boundary. Paste these two classes as-is:

using Com.Nojoom.Lifestyles.Public;

// Adapts an Action<string> to INojoomRedeemListener.
sealed class RedeemListener : Java.Lang.Object, INojoomRedeemListener
{
    readonly Action<string> _onOfferRedeemed;
    public RedeemListener(Action<string> onOfferRedeemed) => _onOfferRedeemed = onOfferRedeemed;
    public void OnOfferRedeemed(string token) => _onOfferRedeemed(token);
}

// Adapts an async Func<Task<string?>> to INojoomRefreshTokenListener.
// The SDK calls OnRefreshToken on the main thread and blocks a background thread (up to 30s)
// waiting for the reply, so run the refresh OFF the main thread and deliver via
// result.OnToken(...) from whatever thread it finishes on (pass null if the refresh failed).
sealed class RefreshTokenListener : Java.Lang.Object, INojoomRefreshTokenListener
{
    readonly Func<Task<string?>> _onRefreshToken;
    public RefreshTokenListener(Func<Task<string?>> onRefreshToken) => _onRefreshToken = onRefreshToken;

    public void OnRefreshToken(INojoomTokenCallback result) => _ = Task.Run(async () =>
    {
        string? newToken;
        try { newToken = await _onRefreshToken(); } catch { newToken = null; }
        result.OnToken(newToken);
    });
}

iOS — full Initialize overload

NojoomSDK.Initialize(
    token,
    onSuccess: () => { /* present MakeContentViewController() */ },
    onError: message => { /* show error */ },
    onSessionExpired: () => { /* prompt re-login */ },
    onRefreshToken: completion => Task.Run(async () =>
    {
        string? fresh;
        try { fresh = await GetFreshTokenAsync(); } catch { fresh = null; }
        completion.Provide(fresh);   // any thread; null = refresh failed
    }),
    onOfferRedeemed: redeemToken => { /* forward opaque token to your backend */ });

Pass null for any callback you don't need.

Behaviour notes

• The SDK owns the whole screen; your app gets no navigation callbacks until the user backs out.
• Security is on by default: screenshots/recording of SDK screens are blocked, plus device integrity checks. Relaxed automatically on debug builds so emulator/QA is unaffected.
• Token carries a ~1-hour backend expiry + configurable idle timeout (default 30 min).

API surface

Android (Com.Nojoom.Lifestyles.Public) — NojoomActivity.CreateIntent(context, token), SetOnOfferRedeemed, SetOnRefreshToken; NojoomSDK.Initialize/IsInitialized/Reset; INojoomRedeemListener, INojoomRefreshTokenListener, INojoomTokenCallback. (NojoomSDKView is intentionally not bound — use NojoomActivity.)

iOS (NojoomLifestyles) — NojoomSDK.Initialize(token, onSuccess, onError[, onSessionExpired, onRefreshToken, onOfferRedeemed]), MakeContentViewController(), IsInitialized, Reset(), NojoomTokenCompletion.Provide(token).

License

Proprietary. All rights reserved. See LICENSE.txt.