我必须将一个KML文件绘制到MapView中。我看了 在互联网上,但我没有找到一个如何做到的例子, 如果有人能举例说明怎么做就会很棒!
答案 0 :(得分:0)
Google已停止使用kml文件,最好解析xml或json。
答案 1 :(得分:0)
现在不支持KML。您可以像没有KML那样画出痕迹:
1)向Google服务请求:
Request : http://maps.googleapis.com/maps/api/directions/output?parameters Info about : https://developers.google.com/maps/documentation/directions/
2)发送请求
3)解析JSON响应,如下所示:
JSONObject jsonObject;
...
JSONArray results = jsonObject.optJSONArray("routes");
JSONObject route = results.optJSONObject(0);
JSONArray legs = route.optJSONArray("legs");
JSONObject leg = legs.optJSONObject(0);
JSONArray steps = leg.optJSONArray("steps");
for (int i=0; i < steps.length(); ++i) {
JSONObject step = steps.optJSONObject(i);
JSONObject startP = step.optJSONObject("start_location");
JSONObject endP = step.optJSONObject("end_location");
JSONObject polyline = step.optJSONObject("polyline");
String encodedPoints = polyline.optString("points");
...
4) encodedPoints 有许多可以解码的点:Map View draw directions using google Directions API - decoding polylines
5)绘制这样的叠加层:
private class Road extends Overlay {
private ArrayList<GeoPoint> list;
private Paint paint;
public Road(ArrayList<GeoPoint> list) {
this.list = new ArrayList<GeoPoint>();
this.list.addAll(list);
paint = new Paint();
paint.setColor(Color.MAGENTA);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(4);
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
drawPath(mapView, canvas);
}
private void drawPath(MapView mv, Canvas canvas) {
int x1 = -1;
int y1 = -1;
int x2 = -1;
int y2 = -1;
Point point = new Point();
for (int i=0; i < list.size(); i++) {
mv.getProjection().toPixels(list.get(i), point);
x2 = point.x;
y2 = point.y;
if (i > 0) {
canvas.drawLine(x1, y1, x2, y2, paint);
}
x1 = x2;
y1 = y2;
}
}
祝你好运!
答案 2 :(得分:0)
自2012年7月27日以来,这种通过解析KML文件从Google中提取Google方向的方式已不再可用(因为Google已经更改了检索Google方向的结构,现在您只能通过JSON或XML获取它),它是时候使用JSON而不是KML。
在我自己的问题here中查看答案。