flutter_polyline_points

A flutter plugin that decodes encoded google polyline string into list of geo-coordinates suitable for showing route/polyline on maps

Getting Started

This package contains functions to decode google encoded polyline string which returns a list of co-ordinates indicating route between two geographical position

Usage

To use this package, add flutter_polyline_points as a dependency in your pubspec.yaml file.

Import the package

import 'package:flutter_polyline_points/flutter_polyline_points.dart';

First method

Get the list of points by Geo-coordinate, this return an instance of PolylineResult, which contains the status of the api, the errorMessage, and the list of decoded points.

PolylinePoints polylinePoints = PolylinePoints();
PolylineResult result = await polylinePoints.getRouteBetweenCoordinates(
        googleApiKey: googleAPiKey,
        request: PolylineRequest(
        origin: PointLatLng(_originLatitude, _originLongitude),
        destination: PointLatLng(_destLatitude, _destLongitude),
        mode: TravelMode.driving,
        wayPoints: [PolylineWayPoint(location: "Sabo, Yaba Lagos Nigeria")],
        ),
);
print(result.points);

Second method

Decode an encoded google polyline string e.g _piFps|U_ulLnnqC_mqNvxq`@

List<PointLatLng> result = polylinePoints.decodePolyline("_p~iF~ps|U_ulLnnqC_mqNvxq`@");
print(result);

Third method

Fetch polyline with alternative routes. This method returns a list of PolylineResult

List<PolylineResult> resulte = await PolylinePoints().getRouteBetweenCoordinates(
      googleApiKey: googleAPiKey,
      request: PolylineRequest(
        origin: PointLatLng(_originLatitude, _originLongitude),
        destination: PointLatLng(_destLatitude, _destLongitude),
        mode: TravelMode.driving,
        wayPoints: [PolylineWayPoint(location: "Sabo, Yaba Lagos Nigeria")],
      ),
    );
print(results.length);

See the example directory for a complete sample app

Hint

kindly ensure you use a valid google api key,
If you need help generating api key for your project click this link