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Quickstarts/Xamarin
XamarinEntitlement Required40 minutes

Extract a Xamarin map integration for replacement

a shared .NET contract with independently owned Android and iOS adapters

Entitlement Required

What this path can prove

No public repository in the snapshot provides a current Xamarin successor. Obtain the existing binding/source and target-platform contract from Mappls and use the migration principles before implementation.

Credential boundary

Use separately restricted native app credentials and keep privileged service credentials on a backend. Do not move secrets into shared assemblies during extraction.

Provider-specific implementation intentionally stops here.

No public guide proves this distribution. Obtain the named entitled/private contract, attach its version and fingerprint to the project, then implement only inside the scaffolded adapter.

Before the timer starts

Prepare the exact environment

Do not count account, package, build-host, or device discovery as hidden quickstart work.

  1. 01

    An existing Xamarin solution and reproducible build host

  2. 02

    Inventory of NuGet packages, native bindings, binaries, and licenses

  3. 03

    Android and iOS journey fixtures

  4. 04

    A confirmed supported migration target

Five-stage path

Build one complete result

Each stage has a proof. If the proof is missing, do not advance by assumption.

  1. 01

    Confirm the source line

    Open the linked evidence and confirm the exact Xamarin package, endpoint, toolchain, region, and account entitlement before installing anything. No public repository in the snapshot provides a current Xamarin successor. Obtain the existing binding/source and target-platform contract from Mappls and use the migration principles before implementation.

  2. 02

    Create a clean boundary

    Move place IDs, domain commands, view models, and persistence interfaces into a framework-independent library; leave native views, delegates, permissions, and Mappls symbols in platform adapters.

  3. 03

    Build one useful result

    Freeze one search-select-map journey as shared contract tests and implement it through the existing Android/iOS adapters without changing UI behavior.

  4. 04

    Run the release path

    Build both platform release configurations from a clean host, navigate/recreate pages, dispose renderers, and run the same fixture contract against the selected replacement adapter.

  5. 05

    Break it deliberately

    Exercise missing/denied credentials, unavailable network or runtime, invalid input, cancellation, and cleanup. Show a bounded user-safe failure while retaining a correlation identity for support.

Clean-path commands

Run what will ship

Replace documented placeholders through your environment or secret provider. Commands are scaffolds; platform signing, accounts, packages, and schemes remain project-specific.

$ dotnet restore

$ dotnet test

$ dotnet build -c Release
Application-owned seam

Start with code you can replace

The scaffold keeps provider-specific symbols and credentials behind a narrow boundary. Bind the confirmed Mappls source line inside that adapter.

Xamarin first-success scaffold
public sealed record Place(string Id, string Label, double Latitude, double Longitude);

public interface IPlacesProvider
{
    Task<IReadOnlyList<Place>> SearchAsync(string query, CancellationToken cancellation);
}

// Xamarin and replacement adapters implement the same fixture-tested interface.
public sealed class PlacesFeature(IPlacesProvider provider)
{
    public Task<IReadOnlyList<Place>> Search(string query, CancellationToken ct) => provider.SearchAsync(query, ct);
}
Definition of first success

Verify behavior, not screenshots

  1. 1

    Shared tests prove equivalent place identity and errors while no shared state retains a native view, context, delegate, or credential.

  2. 2

    A blocked, missing, or unentitled provider produces a useful explicit failure rather than a blank surface or fabricated result.

  3. 3

    No server credential, bearer value, precise private fixture, or provider response body appears in client bundles, logs, screenshots, or test artifacts.

  4. 4

    Resources, listeners, sessions, processes, or requests stop cleanly when the owning screen, request, or application ends.

Before productionSupport posture is documentedBoth native builds are reproducibleShared code owns no native resourcesJourney parity determines migrationThe support and security posture is documentedBuild inputs can be reproducedNative resources have deterministic ownershipMigration parity is measured with journey-level tests
Fast diagnosis

When first contact fails

Keep the safe provider request identity, resolved package/runtime versions, platform logs, and exact reproduction steps. Never attach credentials or private location payloads.

SignalLikely causeNext action
Shared tests pass but a platform leaks or crashes after navigation

Renderer/delegate/event ownership remains implicit or native callbacks target a disposed shared object.

Trace creation, subscription, disappearance, disposal, and late callbacks per platform; introduce cancellation/version fencing at the adapter boundary.

Authentication or entitlement is rejected

The credential class, restriction, account region, host/path generation, package application, or subscribed capability does not match.

Do not try another credential shape blindly. Capture the safe status/request identity and reconcile the exact contract in the developer console or support packet.

The sample works once but not after reload, backgrounding, or a second run

Lifecycle ownership, listener disposal, token/session refresh, saved state, or a singleton initialization boundary is incomplete.

Instrument create/ready/cancel/destroy transitions and prove one owner before adding product behavior.

Keep building

From first success to a real journey

Choose the next tutorial only after the quickstart verification holds in your release path.