Question: In my application, I am starting the Google Navigation with the help of following set of code.

```
String uri = "http://maps.google.com/maps?saddr="+ gpsLatitude
            + "," + gpsLongitude
            + "&daddr="
            + updateAcceptedOfferDetailsData.getDestinationLat()+","+updateAcceptedOfferDetailsData.getDestinationLon();
            Intent intent = new Intent(android.content.Intent.ACTION_VIEW,
                    Uri.parse(uri));
            intent.setClassName("com.google.android.apps.maps",
            "com.google.android.maps.MapsActivity");
            startActivity(intent);

```

I am passing the Source Lat/Lng and Destination Lat/Lng of the respective addresses.

**Problem:-** Here my problem is when the Navigation Screen opens there is no option to **"Start"** rather there is another option **"Preview"**, This problem do not happens at all the places it works fine for some places but not for all. May I know what the whole mess is??

Thanks

Answer: 
You can only navigate from where you are. If you are looking for a route from a different starting point to where you are at that current point in time you can only see a preview. As soon as you are at the starting location it will navigate. 

Hope that makes sense.
I'm glad I found this thread which gave me the right solution.  

I had created a route on my PC and sent it to my phone.  

When I tried to start it, it only showed the Preview option but no Start.  

To solve it, I edited the stops, added my location and moved it to the top as the starting point.  

Then I clicked on "Done" and the Start button was shown.