Ionic Meetup
#19 Tokyo

最新の情報を手に入れよう。2022/05/29(日)、東京開催。

DocsプラグインCLI

@capacitor/google-maps

Google maps on Capacitor

Install

npm install @capacitor/google-maps
npx cap sync

API Keys

To use the Google Maps SDK on any platform, API keys associated with an account with billing enabled are required. These can be obtained from the Google Cloud Console. This is required for all three platforms, Android, iOS, and Javascript. Additional information about obtaining these API keys can be found in the Google Maps documentation for each platform.

iOS

The Google Maps SDK supports the use of showing the users current location via enableCurrentLocation(bool). To use this, Apple requires privacy descriptions to be specified in Info.plist:

  • NSLocationAlwaysUsageDescription (Privacy - Location Always Usage Description)
  • NSLocationWhenInUseUsageDescription (Privacy - Location When In Use Usage Description)

Read about Configuring Info.plist in the iOS Guide for more information on setting iOS permissions in Xcode.

The Google Maps SDK currently does not support running on simulators using the new M1-based Macbooks. This is a known and acknowledged issue and requires a fix from Google. If you are developing on a M1 Macbook, building and running on physical devices is still supported and is the recommended approach.

Android

The Google Maps SDK for Android requires you to add your API key to the AndroidManifest.xml file in your project.

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

To use certain location features, the SDK requires the following permissions to also be added to your AndroidManifest.xml:

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

Usage

The Google Maps Capacitor plugin ships with a web component that must be used to render the map in your application as it enables us to embed the native view more effectively on iOS. The plugin will automatically register this web component for use in your application.

For Angular users, you will get an error warning that this web component is unknown to the Angular compiler. This is resolved by modifying the module that declares your component to allow for custom web components.

import { CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';

@NgModule({
  schemas: [CUSTOM_ELEMENTS_SCHEMA]
})

Include this component in your HTML and assign it an ID so that you can easily query for that element reference later.

<capacitor-google-map id="map"></capacitor-google-map>

On Android, the map is rendered beneath the entire webview, and uses this component to manage its positioning during scrolling events. This means that as the developer, you must ensure that the webview is transparent all the way through the layers to the very bottom. In a typically Ionic application, that means setting transparency on elements such as IonContent and the root HTML tag to ensure that it can be seen. If you can’t see your map on Android, this should be the first thing you check.

On iOS, we render the map directly into the webview and so the same transparency effects are not required. We are investigating alternate methods for Android still and hope to resolve this better in a future update.

The Google Map element itself comes unstyled, so you should style it to fit within the layout of your page structure. Because we’re rendering a view into this slot, by itself the element has no width or height, so be sure to set those explicitly.

capacitor-google-map {
  display: inline-block;
  width: 275px;
  height: 400px;
}

Next, we should create the map reference. This is done by importing the GoogleMap class from the Capacitor plugin and calling the create method, and passing in the required parameters.

import { GoogleMap } from '@capacitor/google-maps';

const apiKey = 'YOUR_API_KEY_HERE';

const mapRef = document.getElementById('map');

const newMap = await GoogleMap.create({
  id: 'my-map', // Unique identifier for this map instance
  element: mapRef, // reference to the capacitor-google-map element
  apiKey: apiKey, // Your Google Maps API Key
  config: {
    center: {
      // The initial position to be rendered by the map
      lat: 33.6,
      lng: -117.9,
    },
    zoom: 8, // The initial zoom level to be rendered by the map
  },
});

At this point, your map should be created within your application. Using the returned reference to the map, you can easily interact with your map in a number of way, a few of which are shown here.

const newMap = await GoogleMap.create({...});

// Add a marker to the map
const markerId = await newMap.addMarker({
  coordinate: {
    lat: 33.6,
    lng: -117.9
  }
});

// Move the map programmatically
await newMap.setCamera({
  coordinate: {
    lat: 33.6,
    lng: -117.9
  }
});

// Enable marker clustering
await newMap.enableClustering();

// Handle marker click
await newMap.setOnMarkerClickListener((event) => {...});

// Clean up map reference
await newMap.destroy();

Full Examples

Angular

import { GoogleMap } from '@capacitor/google-maps';

@Component({
  template: `
    <capacitor-google-maps #map></capacitor-google-maps>
    <button (click)="createMap()">Create Map</button>
  `,
  styles: [
    `
      capacitor-google-maps {
        display: inline-block;
        width: 275px;
        height: 400px;
      }
    `,
  ],
})
export class MyMap {
  @ViewChild('map')
  mapRef: ElementRef<HTMLElement>;
  newMap: GoogleMap;

  async createMap() {
    this.newMap = await GoogleMap.create({
      id: 'my-cool-map',
      element: this.mapRef.nativeElement,
      apiKey: environment.apiKey,
      config: {
        center: {
          lat: 33.6,
          lng: -117.9,
        },
        zoom: 8,
      },
    });
  }
}

React

import { GoogleMap } from '@capacitor/google-maps';

const MyMap: React.FC = () => {
  const mapRef = useRef<HTMLElement>();
  let newMap: GoogleMap;

  async function createMap() {
    if (!mapRef.current) return;

    newMap = await GoogleMap.create({
      id: 'my-cool-map',
      element: mapRef.current,
      apiKey: process.env.REACT_APP_YOUR_API_KEY_HERE,
      config: {
        center: {
          lat: 33.6,
          lng: -117.9
        },
        zoom: 8
      }
    })
  }

  return (
    <div class="component-wrapper">
      <capacitor-google-map ref={mapRef} style={{
        display: 'inline-block',
        width: 275,
        height: 400
      }}></capacitor-google-map>

      <button onClick={createMap}>Create Map</button>
    </div>
  )
}

export default MyMap;

Javascript

<capacitor-google-map id="map"></capacitor-google-map>
<button onclick="createMap()">Create Map</button>

<style>
  capacitor-google-map {
    display: inline-block;
    width: 275px;
    height: 400px;
  }
</style>

<script>
  import { GoogleMap } from '@capacitor/google-maps';

  const createMap = async () => {
    const mapRef = document.getElementById('map');

    const newMap = await GoogleMap.create({
      id: 'my-map', // Unique identifier for this map instance
      element: mapRef, // reference to the capacitor-google-map element
      apiKey: 'YOUR_API_KEY_HERE', // Your Google Maps API Key
      config: {
        center: {
          // The initial position to be rendered by the map
          lat: 33.6,
          lng: -117.9,
        },
        zoom: 8, // The initial zoom level to be rendered by the map
      },
    });
  };
</script>

API

create(…)

create(options: CreateMapArgs, callback?: MapListenerCallback | undefined) => Promise<GoogleMap>
Param Type
options CreateMapArgs
callback MapListenerCallback

Returns: Promise<GoogleMap>


enableClustering()

enableClustering() => Promise<void>

disableClustering()

disableClustering() => Promise<void>

addMarker(…)

addMarker(marker: Marker) => Promise<string>
Param Type
marker Marker

Returns: Promise<string>


addMarkers(…)

addMarkers(markers: Marker[]) => Promise<string[]>
Param Type
markers Marker[]

Returns: Promise<string[]>


removeMarker(…)

removeMarker(id: string) => Promise<void>
Param Type
id string

removeMarkers(…)

removeMarkers(ids: string[]) => Promise<void>
Param Type
ids string[]

destroy()

destroy() => Promise<void>

setCamera(…)

setCamera(config: CameraConfig) => Promise<void>
Param Type
config CameraConfig

setMapType(…)

setMapType(mapType: MapType) => Promise<void>
Param Type
mapType MapType

enableIndoorMaps(…)

enableIndoorMaps(enabled: boolean) => Promise<void>
Param Type
enabled boolean

enableTrafficLayer(…)

enableTrafficLayer(enabled: boolean) => Promise<void>
Param Type
enabled boolean

enableAccessibilityElements(…)

enableAccessibilityElements(enabled: boolean) => Promise<void>
Param Type
enabled boolean

enableCurrentLocation(…)

enableCurrentLocation(enabled: boolean) => Promise<void>
Param Type
enabled boolean

setPadding(…)

setPadding(padding: MapPadding) => Promise<void>
Param Type
padding MapPadding

setOnCameraIdleListener(…)

setOnCameraIdleListener(callback?: MapListenerCallback | undefined) => Promise<void>
Param Type
callback MapListenerCallback

setOnCameraMoveStartedListener(…)

setOnCameraMoveStartedListener(callback?: MapListenerCallback | undefined) => Promise<void>
Param Type
callback MapListenerCallback

setOnClusterClickListener(…)

setOnClusterClickListener(callback?: MapListenerCallback | undefined) => Promise<void>
Param Type
callback MapListenerCallback

setOnClusterInfoWindowClickListener(…)

setOnClusterInfoWindowClickListener(callback?: MapListenerCallback | undefined) => Promise<void>
Param Type
callback MapListenerCallback

setOnInfoWindowClickListener(…)

setOnInfoWindowClickListener(callback?: MapListenerCallback | undefined) => Promise<void>
Param Type
callback MapListenerCallback

setOnMapClickListener(…)

setOnMapClickListener(callback?: MapListenerCallback | undefined) => Promise<void>
Param Type
callback MapListenerCallback

setOnMarkerClickListener(…)

setOnMarkerClickListener(callback?: MapListenerCallback | undefined) => Promise<void>
Param Type
callback MapListenerCallback

setOnMyLocationButtonClickListener(…)

setOnMyLocationButtonClickListener(callback?: MapListenerCallback | undefined) => Promise<void>
Param Type
callback MapListenerCallback

setOnMyLocationClickListener(…)

setOnMyLocationClickListener(callback?: MapListenerCallback | undefined) => Promise<void>
Param Type
callback MapListenerCallback

Interfaces

CreateMapArgs

Prop Type
id string
apiKey string
config GoogleMapConfig
element HTMLElement
forceCreate boolean

GoogleMapConfig

Prop Type Description Default
width number Override width for native map
height number Override height for native map
x number Override absolute x coordinate position for native map
y number Override absolute y coordinate position for native map
center LatLng Default location on the Earth towards which the camera points.
zoom number Sets the zoom of the map.
androidLiteMode boolean Enables image-based lite mode on Android. false

LatLng

An interface representing a pair of latitude and longitude coordinates.

Prop Type Description
lat number Coordinate latitude, in degrees. This value is in the range [-90, 90].
lng number Coordinate longitude, in degrees. This value is in the range [-180, 180].

Marker

A marker is an icon placed at a particular point on the map’s surface.

Prop Type Description Default
coordinate LatLng Marker position
opacity number Sets the opacity of the marker, between 0 (completely transparent) and 1 inclusive. 1
title string Title, a short description of the overlay.
snippet string Snippet text, shown beneath the title in the info window when selected.
isFlat boolean Controls whether this marker should be flat against the Earth’s surface or a billboard facing the camera. false
iconUrl string Marker icon to render.
draggable boolean Controls whether this marker can be dragged interactively false

CameraConfig

Configuration properties for a Google Map Camera

Prop Type Description Default
coordinate LatLng Location on the Earth towards which the camera points.
zoom number Sets the zoom of the map.
bearing number Bearing of the camera, in degrees clockwise from true north. 0
angle number The angle, in degrees, of the camera from the nadir (directly facing the Earth). The only allowed values are 0 and 45. 0
animate boolean Animate the transition to the new Camera properties. false
animationDuration number

MapPadding

Controls for setting padding on the ‘visible’ region of the view.

Prop Type
top number
left number
right number
bottom number

Type Aliases

MapListenerCallback

(data: any): void

Enums

MapType

Members Value Description
Normal 'Normal' Basic map.
Hybrid 'Hybrid' Satellite imagery with roads and labels.
Satellite 'Satellite' Satellite imagery with no labels.
Terrain 'Terrain' Topographic data.
None 'None' No base map tiles.
Previous
<- ジオロケーション
Next
Haptics ->
Contribute ->