如何从Android中的当前位置获取我们在地图中触摸的地方的方向

Question

I went through lots of links but I am getting confuse about getting direction on Google map. When my apps get start it shows user's current location, and when user click on hospital logo which is on map, it will shows all hospitals within 5 km with user's current location. When user click on any places hospital he get information about it.

Now my point is I want to show direction from current location to hospital which is touched by user. I am using google map API of v2 .

Please give me the way through which I can achieve this task...

Answer 1

try this

try {
        Intent directioIntent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse("http://maps.google.com/maps?saddr=" + strSourceLatitude  + "," + strSourceLongitude + "&daddr=" + strDestinationLatitude + "," + strDestinationLongitude));
            directioIntent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity");
            startActivity(directioIntent);
        } catch (Exception e) {
            Utilities.showToast(GetDirectionActivity.this, "Google Map is not installed on your device.");
        }

Answer 2

Checkout this blog post I wrote on painting a Polyline on Google Maps API V2 to draw direction from one location to another:

Google Maps API V2 Directions

you will find the the relevant methods to get you started.