Question

我在资源文件夹中使用此代码在webview中运行它：但是它的速度非常慢如何使路线图和缩放控件显示为半视图内部和另一半在webview外部。

如何解决这些问题。

请帮我解决这些问题。谢谢。

MainActivity：

myWebView = (WebView)this.findViewById(R.id.webView1);
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
myWebView.loadUrl("file:///android_asset/1.html");

html文件：

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="UTF-8">
    <title>Fusion Tables Layer Example: Mouseover Map Styles</title>
  </head>
  <body>

<style type="text/css">
      #map-canvas {
        height: 500px;
        width: 600px;
      }
    </style>
    <script type="text/javascript"
        src="http://maps.googleapis.com/maps/api/js?sensor=true"></script>

    <script type="text/javascript">
      var colors = ['#FF0000', '#00FF00', '#0000FF', '#FFFF00'];
      var map;

      function initialize() {
        var myOptions = {
          zoom: 2,
          center: new google.maps.LatLng(10, 0),
          mapTypeId: google.maps.MapTypeId.ROADMAP
        };

        map = new google.maps.Map(document.getElementById('map-canvas'),
            myOptions);

        // Initialize JSONP request
        var script = document.createElement('script');
        var url = ['https://www.googleapis.com/fusiontables/v1/query?'];
        url.push('sql=');
        var query = 'SELECT name, kml_4326 FROM ' +
            '1foc3xO9DyfSIF6ofvN0kp2bxSfSeKog5FbdWdQ';
        var encodedQuery = encodeURIComponent(query);
        url.push(encodedQuery);
        url.push('&callback=drawMap');
        url.push('&key=AIzaSyAm9yWCV7JPCTHCJut8whOjARd7pwROFDQ');
        script.src = url.join('');
        var body = document.getElementsByTagName('body')[0];
        body.appendChild(script);
      }

      function drawMap(data) {
        var rows = data['rows'];
        for (var i in rows) {
          if (rows[i][0] != 'Antarctica') {
            var newCoordinates = [];
            var geometries = rows[i][1]['geometries'];
            if (geometries) {
              for (var j in geometries) {
                newCoordinates.push(constructNewCoordinates(geometries[j]));
              }
            } else {
              newCoordinates = constructNewCoordinates(rows[i][1]['geometry']);
            }
            var randomnumber = Math.floor(Math.random() * 4);
            var country = new google.maps.Polygon({
              paths: newCoordinates,
              strokeColor: colors[randomnumber],
              strokeOpacity: 0,
              strokeWeight: 1,
              fillColor: colors[randomnumber],
              fillOpacity: 0.3
            });
            google.maps.event.addListener(country, 'mouseover', function() {
              this.setOptions({fillOpacity: 1});
            });
            google.maps.event.addListener(country, 'mouseout', function() {
              this.setOptions({fillOpacity: 0.3});
            });

            country.setMap(map);
          }
        }
      }

      function constructNewCoordinates(polygon) {
        var newCoordinates = [];
        var coordinates = polygon['coordinates'][0];
        for (var i in coordinates) {
          newCoordinates.push(
              new google.maps.LatLng(coordinates[i][1], coordinates[i][0]));
        }
        return newCoordinates;
      }

      google.maps.event.addDomListener(window, 'load', initialize);
    </script>
<div id="map-canvas"></div>

Answer 1

您可以使用多种技术使页面加载速度更快。这包括异步加载脚本，显示进度指示器并延迟地图自定义，直到初始图块集加载为止。

请参阅Google Maps API v3: Developing for Mobile Devices

如何在Android上加载javascript maps v3更快

1 个答案: