我正在使用Bing Maps Android SDK,希望找到一种方法来单击我创建的多边形并显示信息框。我已经成功地为一个图钉完成了这个任务,但是对于多边形却没有。我看过这个答案,但我的应用程序需要数百个这样的多边形,所以我正在寻找一种更快的解决方案,使用多边形上的addHandler方法。我知道这对于AJAX v7版本的SDK是可能的,这也是Android SDK的基础。
我尝试过的AJAX版本代码(使用这个仿真器进行测试):
我尝试过的AJAX版本代码(使用这个仿真器进行测试):
map.entities.clear();
latlon = map.getCenter();
var polygon = new Microsoft.Maps.Polygon([new Microsoft.Maps.Location(latlon.latitude, latlon.longitude-0.15), new Microsoft.Maps.Location(latlon.latitude+0.1, latlon.longitude-0.05), new Microsoft.Maps.Location(latlon.latitude+0.1, latlon.longitude+0.05), new Microsoft.Maps.Location(latlon.latitude, latlon.longitude+0.15), new Microsoft.Maps.Location(latlon.latitude-0.1, latlon.longitude+0.05), new Microsoft.Maps.Location(latlon.latitude-0.1, latlon.longitude-0.05), new Microsoft.Maps.Location(latlon.latitude, latlon.longitude-0.15)], null);
Microsoft.Maps.Events.addHandler(polygon, 'click', DisplayInfo);
map.setView( {zoom:10});
map.entities.push(polygon);
function DisplayInfo (e) {
var vertices = e.target.getLocations();
var verticeCenter = new Microsoft.Maps.Location(0,0);
//Calculating location of center
for (i=0; i<vertices.length-1; i++) {
verticeCenter.latitude = verticeCenter.latitude + vertices[i].latitude;
verticeCenter.longitude = verticeCenter.longitude + vertices[i].longitude;
}
verticeCenter.latitude = verticeCenter.latitude / (vertices.length - 1);
verticeCenter.longitude = verticeCenter.longitude / (vertices.length - 1);
defaultInfobox = new Microsoft.Maps.Infobox(verticeCenter, {width: 200, height: 50} );
map.entities.push(defaultInfobox);
}
然而,我从SDK的assets文件夹中向BingMapsAndroid.js推送了类似的代码,但是它没有起作用。通过使用hasHandler方法进行检查,处理程序已经被附加。触摸事件被记录并且它们的纬度和经度值被发送到日志中,但是即使触摸点位于多边形内部,多边形事件也没有被触发。
BingMapsAndroid.js中的多边形测试函数:
this.PolygonTest = function() {
_map.entities.clear();
latlon = new Microsoft.Maps.Location(1,1);
console.log("Polygon test function");
var polygon = new Microsoft.Maps.Polygon([new Microsoft.Maps.Location(latlon.latitude, latlon.longitude-0.15), new Microsoft.Maps.Location(latlon.latitude+0.1, latlon.longitude-0.05), new Microsoft.Maps.Location(latlon.latitude+0.1, latlon.longitude+0.05), new Microsoft.Maps.Location(latlon.latitude, latlon.longitude+0.15), new Microsoft.Maps.Location(latlon.latitude-0.1, latlon.longitude+0.05), new Microsoft.Maps.Location(latlon.latitude-0.1, latlon.longitude-0.05), new Microsoft.Maps.Location(latlon.latitude, latlon.longitude-0.15)], null);
try {
Microsoft.Maps.Events.addHandler(polygon, 'click', function(e) { console.log("Polygon click!"); }); //This is never evoked
Microsoft.Maps.Events.addHandler(_map, 'click', function(e) { var point = new MM.Point(e.getX(), e.getY()); var loc = e.target.tryPixelToLocation(point); console.log("lat: " + loc.latitude + ", lon: " + loc.longitude); });
} catch(e) {
alert("Error");
}
_map.setView( {zoom:10});
_map.entities.push(polygon);
if (Microsoft.Maps.Events.hasHandler(polygon,'click')) {
console.log("Polygon has click handler."); //This works
}
//This function should be added to the click handler for polygon. I'll add it when I know the handler works.
function DisplayInfo (e) {
console.log("Polygon has been clicked.");
var vertices = e.target.getLocations();
var verticeCenter = new Microsoft.Maps.Location(0,0);
for (i=0; i<vertices.length-1; i++) {
verticeCenter.latitude = verticeCenter.latitude + vertices[i].latitude;
verticeCenter.longitude = verticeCenter.longitude + vertices[i].longitude;
}
verticeCenter.latitude = verticeCenter.latitude / (vertices.length - 1);
verticeCenter.longitude = verticeCenter.longitude / (vertices.length - 1);
defaultInfobox = new Microsoft.Maps.Infobox(verticeCenter, { width: 200, height: 50 });
_map.entities.push(defaultInfobox);
}
}