如何获得位置的经纬度点击折线？

Question

I am getting setOnPolylineClickListener by following method.

mMap.setOnPolylineClickListener(new GoogleMap.OnPolylineClickListener() {
            @Override
            public void onPolylineClick(Polyline polyline) {
}

But this returns whole PolylineI want Latitude and Longitudeof click position like we get by MapClickListener how to achieve this ?

mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {

            @Override
            public void onMapClick(final LatLng point) {

        });

I have tried using PolyUtil with following code it also doesn't work.

mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {

            @Override
            public void onMapClick(final LatLng point) {
                if (PolyUtil.isLocationOnPath(point, finalPolylines.getPoints(), true)) {
                    // user clicked on polyline

                    Toast.makeText(getContext(), "found", Toast.LENGTH_SHORT).show();
                    Log.d("found", "onMapClick:  found");
                }
            }
        });

Answer 1

你做的一切都很好：

mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {

    @Override
    public void onMapClick(final LatLng point) {
        if (PolyUtil.isLocationOnPath(point, finalPolylines.getPoints(), true)) {
            // user clicked on polyline

            Toast.makeText(getContext(), "found", Toast.LENGTH_SHORT).show();
            Log.d("found", "onMapClick:  found");
        }
    }
});

是解决方案，但 PolyUtil.isLocationOnPath(LatLng point, java.util.List<LatLng> polyline, boolean geodesic) has 0.1 meter tolerance by default, and touch just didn't on path with this precise. Use PolyUtil.isLocationOnPath(LatLng point, java.util.List<LatLng> polyline, boolean geodesic, double tolerance) 相反，设置适当的 tolerance（10 米或 20 米 - 甚至更多，这取决于缩放级别）

mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {

    @Override
    public void onMapClick(final LatLng point) {
        if (PolyUtil.isLocationOnPath(point, finalPolylines.getPoints(), true, 20)) {
            // user clicked on polyline

            Toast.makeText(getContext(), "found", Toast.LENGTH_SHORT).show();
            Log.d("found", "onMapClick:  found");
        }
    }
});

一切正常！

更新：

您还可以根据缩放级别修改 tolerance，例如：

...
switch (mMap.getCameraPosition().zoom) {
    ...
    case 16:
        tolerance = 30;
    break;
    case 15:
        tolerance = 45;
    break;
    ...
}
...

或使用公式：tolerance = f(zoom level) like tolerance = 1000 / mMap.getCameraPosition().zoom;.

如何获得位置的经纬度点击折线？

how to get lat lng of position click on polyline?

android

google-maps

google-polyline