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Quickstarts/Flutter
FlutterPublic Source30 minutes

Build a native-backed Flutter place picker

a Dart form that commits one accepted Mappls place identity

Public Source

What this path can prove

The corpus contains Mappls sample evidence and an older current-classified MapmyIndia wrapper. Confirm the supported Flutter/Dart plugin and both native SDK lines before choosing one.

Credential boundary

Configure separately restricted Android and iOS app credentials in their native projects. Do not put server secrets in Dart assets or compile-time constants.

current
Mappls Flutter SDKmappls-flutter-sdk
deprecated
Flutter MapmyIndia GLflutter-mapmyindia-gl
Before the timer starts

Prepare the exact environment

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

  1. 01

    A clean Flutter application

  2. 02

    Confirmed Flutter, Dart, plugin, Android, and iOS matrix

  3. 03

    Restricted credentials for both native runners

  4. 04

    Physical devices and release signing

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 Flutter package, endpoint, toolchain, region, and account entitlement before installing anything. The corpus contains Mappls sample evidence and an older current-classified MapmyIndia wrapper. Confirm the supported Flutter/Dart plugin and both native SDK lines before choosing one.

  2. 02

    Create a clean boundary

    Pin one confirmed plugin line, apply native repository/package/manifest/Info.plist steps, and own controller readiness plus disposal inside one stateful widget.

  3. 03

    Build one useful result

    Keep query text, candidates, camera, candidate marker, and accepted place as separate states; submit only the accepted stable identity.

  4. 04

    Run the release path

    Run analyzer/tests, create Android and iOS release builds, pop/push the route repeatedly, deny permissions, rotate, and submit after editing a prior selection.

  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.

$ flutter pub get

$ flutter analyze

$ flutter test

$ flutter build apk

$ flutter build ios --no-codesign
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.

Flutter first-success scaffold
class PlaceSelection {
  final String id;
  final String label;
  const PlaceSelection(this.id, this.label);
}

class PlacePickerState {
  String query = '';
  PlaceSelection? accepted;
  void edit(String value) { query = value; accepted = null; }
  void accept(PlaceSelection place) { query = place.label; accepted = place; }
  void validate() { if (accepted == null) throw StateError('select_a_place'); }
}
Definition of first success

Verify behavior, not screenshots

  1. 1

    The form cannot submit stale text as a selected place and platform views/controllers are disposed after navigation.

  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 productionBoth runner configurations are versionedController readiness is awaitedSelection state is explicitPhysical-device releases are testedAndroid and iOS configuration is version-controlledControllers are used only after readinessStreams and platform views are disposedRelease builds are tested on physical devices
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
The Dart API resolves but the platform view fails at runtime

Android/iOS native configuration, plugin/native version, renderer, architecture, permission, or credential setup is incomplete.

Run the plugin's minimal native-backed screen on each platform, inspect native logs and dependency graphs, and wait for controller readiness before commands.

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.