我已经使用LatLng.Builder覆盖了Google map中的多个位置，并且它正在工作。我是否有办法覆盖Google map中两个位置之间的整个路径?
我的当前代码包含多个位置
builder = new LatLngBounds.Builder();
builder.include(LatLng1);
builder.include(LatLng2);
googleMap.animateCamera(CameraUpdateFactory.newLatLngBounds(builder.build(), 17));
有什么建议吗?
由于
我知道你已经找到了答案，但这是我解决这个问题的方法
boolean hasPoints = false;
Double maxLat = null, minLat = null, minLon = null, maxLon = null;
if (polyline != null && polyline.getPoints() != null) {
List<LatLng> pts = polyline.getPoints();
for (LatLng coordinate : pts) {
// Find out the maximum and minimum latitudes & longitudes
// Latitude
maxLat = maxLat != null ? Math.max(coordinate.latitude, maxLat) : coordinate.latitude;
minLat = minLat != null ? Math.min(coordinate.latitude, minLat) : coordinate.latitude;
// Longitude
maxLon = maxLon != null ? Math.max(coordinate.longitude, maxLon) : coordinate.longitude;
minLon = minLon != null ? Math.min(coordinate.longitude, minLon) : coordinate.longitude;
hasPoints = true;
}
}
if (hasPoints) {
LatLngBounds.Builder builder = new LatLngBounds.Builder();
builder.include(new LatLng(maxLat, maxLon));
builder.include(new LatLng(minLat, minLon));
map.moveCamera(CameraUpdateFactory.newLatLngBounds(builder.build(), 48));
}
解决方法很简单
这可能会对将来寻找这类功能的人有所帮助。
此方法在google direction API从location A to B返回路由后调用。directionPoints为该路由点的list。
public void handleResult(ArrayList<LatLng> directionPoints)
{
PolylineOptions rectLine = new PolylineOptions().width(3).color(Color.RED);
for(int i = 0 ; i < directionPoints.size() ; i++)
{
rectLine.add(directionPoints.get(i));
}
//this polyline is stored so that it can be removed by calling drawnRoutePath.remove() if needed
drawnRoutePath = googleMap.addPolyline(rectLine);
prepareBuilder(directionPoints);
googleMap.animateCamera(CameraUpdateFactory.newLatLngBounds(builder.build(), 17));
}
来自Google Direction API的json响应
"routes" : [
{
"bounds" : {
"northeast" : {
"lat" : 27.7136953,
"lng" : 85.32216629999999
},
"southwest" : {
"lat" : 27.7103725,
"lng" : 85.3214952
}
},
.... etc
所以我使用这个边界的lat和lng作为LatLngBounds.Builder的参数。
JSONObject jsonBound = ((JSONObject)jRoutes.get(i)).getJSONObject("bounds");
JSONObject jsonSouthWest = jsonBound.getJSONObject("southwest");
JSONObject jsonNorthEast = jsonBound.getJSONObject("northeast");
LatLng boundSouthWest = new LatLng(jsonSouthWest.getDouble("lat"),jsonSouthWest.getDouble("lng"));
LatLng boundNorthEast = new LatLng(jsonNorthEast.getDouble("lat"),jsonNorthEast.getDouble("lng"));
ArrayList<LatLng> bounds = new ArrayList<LatLng>();
bounds.add(boundNorthEast);
bounds.add(boundSouthWest);
并将这些点包含在LatLngBounds.Builder
最简单的方法
private GoogleMap mMap;
// Create a LatLngBounds that includes Australia.
private LatLngBounds AUSTRALIA = new LatLngBounds(
new LatLng(-44, 113), new LatLng(-10, 154));
// Set the camera to the greatest possible zoom level that includes the
// bounds
mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(AUSTRALIA, 0));