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激活 Google Maps JavaScript API

为帮助您起步,我们将引导您在 Google Developers Console 中先完成几项任务:

  1. 创建或选择项目
  2. 激活 Google Maps JavaScript API 及相关服务
  3. 创建相应密钥
继续

Travel modes in directions

This example demonstrates the use of the DirectionsService object to fetch directions for different travel modes.

Read the documentation or view this example full screen.

function initMap() {
  var directionsDisplay = new google.maps.DirectionsRenderer;
  var directionsService = new google.maps.DirectionsService;
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 14,
    center: {lat: 37.77, lng: -122.447}
  });
  directionsDisplay.setMap(map);

  calculateAndDisplayRoute(directionsService, directionsDisplay);
  document.getElementById('mode').addEventListener('change', function() {
    calculateAndDisplayRoute(directionsService, directionsDisplay);
  });
}

function calculateAndDisplayRoute(directionsService, directionsDisplay) {
  var selectedMode = document.getElementById('mode').value;
  directionsService.route({
    origin: {lat: 37.77, lng: -122.447},  // Haight.
    destination: {lat: 37.768, lng: -122.511},  // Ocean Beach.
    // Note that Javascript allows us to access the constant
    // using square brackets and a string value as its
    // "property."
    travelMode: google.maps.TravelMode[selectedMode]
  }, function(response, status) {
    if (status == 'OK') {
      directionsDisplay.setDirections(response);
    } else {
      window.alert('Directions request failed due to ' + status);
    }
  });
}
<div id="floating-panel">
<b>Mode of Travel: </b>
<select id="mode">
  <option value="DRIVING">Driving</option>
  <option value="WALKING">Walking</option>
  <option value="BICYCLING">Bicycling</option>
  <option value="TRANSIT">Transit</option>
</select>
</div>
<div id="map"></div>
/* Always set the map height explicitly to define the size of the div
 * element that contains the map. */
#map {
  height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}
#floating-panel {
  position: absolute;
  top: 10px;
  left: 25%;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
  text-align: center;
  font-family: 'Roboto','sans-serif';
  line-height: 30px;
  padding-left: 10px;
}
 <!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap">
</script>

自己试一试

悬停在代码块右上角以复制代码或在 JSFiddle 中打开。

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Travel modes in directions</title>
    <style>
      /* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
      #map {
        height: 100%;
      }
      /* Optional: Makes the sample page fill the window. */
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
      #floating-panel {
        position: absolute;
        top: 10px;
        left: 25%;
        z-index: 5;
        background-color: #fff;
        padding: 5px;
        border: 1px solid #999;
        text-align: center;
        font-family: 'Roboto','sans-serif';
        line-height: 30px;
        padding-left: 10px;
      }
    </style>
  </head>
  <body>
    <div id="floating-panel">
    <b>Mode of Travel: </b>
    <select id="mode">
      <option value="DRIVING">Driving</option>
      <option value="WALKING">Walking</option>
      <option value="BICYCLING">Bicycling</option>
      <option value="TRANSIT">Transit</option>
    </select>
    </div>
    <div id="map"></div>
    <script>
      function initMap() {
        var directionsDisplay = new google.maps.DirectionsRenderer;
        var directionsService = new google.maps.DirectionsService;
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 14,
          center: {lat: 37.77, lng: -122.447}
        });
        directionsDisplay.setMap(map);

        calculateAndDisplayRoute(directionsService, directionsDisplay);
        document.getElementById('mode').addEventListener('change', function() {
          calculateAndDisplayRoute(directionsService, directionsDisplay);
        });
      }

      function calculateAndDisplayRoute(directionsService, directionsDisplay) {
        var selectedMode = document.getElementById('mode').value;
        directionsService.route({
          origin: {lat: 37.77, lng: -122.447},  // Haight.
          destination: {lat: 37.768, lng: -122.511},  // Ocean Beach.
          // Note that Javascript allows us to access the constant
          // using square brackets and a string value as its
          // "property."
          travelMode: google.maps.TravelMode[selectedMode]
        }, function(response, status) {
          if (status == 'OK') {
            directionsDisplay.setDirections(response);
          } else {
            window.alert('Directions request failed due to ' + status);
          }
        });
      }
    </script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
    </script>
  </body>
</html>

发送以下问题的反馈:

此网页
Google Maps JavaScript API
Google Maps JavaScript API
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