我正在解析一个XML文件,其中包含我的Android应用程序的数据,该数据将使用Google Maps Android API v2在地图上显示。 XML文件的示例格式为:
<markers>
<marker name="San Pedro Cathedral"
address="Davao City"
lat="7.0647222"
long="125.6091667"
icon="church"/>
<marker name="SM Lanang Premier"
address="Davao City"
lat="7.0983333"
long="125.6308333"
icon="shopping"/>
<marker name="Davao Central High School"
address="Davao City"
lat="7.0769444"
long="125.6136111"
icon="school"/>
</markers>
现在,我想根据标记元素中图标的属性值,使用不同的图标在地图上显示每个标记。我目前通过循环添加标记的代码是:
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse("http://dds.orgfree.com/DDS/landmarks_genxml.php");
NodeList markers = doc.getElementsByTagName("marker");
for (int i = 0; i < markers.getLength(); i++) {
Element item = (Element) markers.item(i);
String name = item.getAttribute("name");
String address = item.getAttribute("address");
String stringLat = item.getAttribute("lat");
String stringLong = item.getAttribute("long");
String icon = item.getAttribute("icon"); //assigned variable for the XML icon attribute
Double lat = Double.valueOf(stringLat);
Double lon = Double.valueOf(stringLong);
map = ((MapFragment) getFragmentManager().findFragmentById(
R.id.map)).getMap();
map.addMarker(new MarkerOptions()
.position(new LatLng(lat, lon))
.title(name)
.snippet(address)
//I have a coding problem here...
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.icon)));
// Move the camera instantly to City Hall with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(CITYHALL, 15));
在我的可绘制文件夹中,我有教堂,购物,学校等所有不同的图标。但是我遇到了问题:
.icon(BitmapDescriptorFactory.fromResource(R.drawable.icon)
因为R.drawable
仅适用于可绘制文件夹中的文件。如何能够动态地根据XML上的图标属性为每个标记显示不同的图标?
非常感谢任何帮助。 :)
答案 0 :(得分:4)
获取资源:
getResources().getIdentifier(icon,"drawable", getPackageName())
上面使用的icon
被指定为XML icon
属性
使用它来动态获取icon
:
.icon(BitmapDescriptorFactory
.fromResource(getResources().getIdentifier(icon,"drawable", getPackageName()))
答案 1 :(得分:3)
试试如下:
// Creates a marker rainbow demonstrating how to
// create default marker icons of different.
int numMarkersInRainbow[] =
{
R.drawable.arrow,
R.drawable.badge_nsw,
R.drawable.badge_qld,
R.drawable.badge_victoria
};
for (int i = 0; i < markers.getLength(); i++) {
mMap.addMarker(new MarkerOptions()
.position(position(new LatLng(lat, lon)))
.title(name)
.icon(BitmapDescriptorFactory.fromResource(numMarkersInRainbow[i])));
}