Develop Reference

set From location to current location in google maps android programmatically

I am creating an app where it requires opening google maps to navigate to a place in walking mode and to set source/from location to current location.
Here is the code I use.
String url = "https://maps.google.co.in/maps?q=" + destination + "&mode=walking";
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
getApplicationContext().startActivity(intent);
How do I set "From location" to "current location"??
Thanks.

I would suggest using a Google Maps URLs instead of the link you provided in the example. The Google Maps URLs is an official and recommended way to launch Google Maps app on mobile devices and web browsers.
Please note that if you omit the origin parameter in the Google Maps URLs, the API will use your current location if available
origin: Defines the starting point from which to display directions. Defaults to most relevant starting location, such as user location, if available. If none, the resulting map may provide a blank form to allow a user to enter the origin. The value can be either a place name, address, or comma-separated latitude/longitude coordinates. A string should be URL-escaped.
So, you should rewrite your code as
String url = "https://www.google.com/maps/dir/?api=1&destination=" + destination + "&travelmode=walking&dir_action=navigate";
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
getApplicationContext().startActivity(intent);
I hope this helps!

Opening Google Maps for Android Navigation with multiple coordinates as waypoints

I want to know if this is possible or now.
Right now I am opening the Google Maps with navigation from current user location to a defined set of coordinates like this:
final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("google.navigation:q=" + String.valueOf(getDestinationLatitude()) + "," + String.valueOf(getDestinationLongitude())));
intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.driveabout.app.NavigationActivity");
startActivity(intent);
Is it possible to to have multiple sets of coordinates between current location and a final destination, so go to point a, point b and then finally destination point c. ?

It is possible to have multiple waypoints along the way to a certain destination. This can be achieved by using the Directions API. This is the API that would also give you the legs[] and the steps[] array which helps you in properly implementing and returning probable paths from source to the destination covering all the waypoints along the way.
For a sample implementation, check this link.

Draw route on map without MapActivity

I want to draw a path on map between known points(lat, long) using:
String uri = "http://maps.google.com/maps?f=d&hl=en&saddr="+source_latitude+","+source_longitude+"&daddr="+destination_latitude+","+destination_longitude;
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);
But instead of just drawing route, Google Maps shows menu Car/Bus/By foot, trying to make a route from my current location to those points. What am I doing wrong? Is it still possible to draw route on map using the method above?

By running this intent you are basically opening an "outside" application - Google Maps that is not related to your application. the behavior you are receiving is the behavior that should be for the version of Google Maps you have in your phone. You can't edit the way it behaves, only the things that you are allowed to change using the settings screen of this application.

You have to parse the xml or json that your are using in the url in an Asynctask class and draw it on the map.

Path between two geopoints on android google maps view

I'm trying to get the path between two geo points on my android app, i don't need any driving directions - just path. What I've already found myself is to draw the straight line between two geopoints (http://djsolid.net/blog/android---draw-a-path-array-of-points-in-mapview). Is it possible to get the actual path? I mean path which I can really walk, road path - not just straight line between two geopoints without parsing the google maps web URL ?

I think the best solution is called android internal map activity to show route between two geo points. Please refer to the code below:
String uri = "http://maps.google.com/maps?saddr=" + currentLatitude+","+currentLongitude+"&daddr="+fixedLatitude+","+fixedLongitude;
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);
It's called built in map activity and draws a route path between current and fixed latitude and longitude.

Android and draw routes in Google maps

I have a small problem, I need to develop an application that shows the route of public transport, I found tutorials about route of cars.
I saw this example:http://maps.google.com/maps?f=d&hl=en&saddr=25.04202,121.534761&daddr=25.05202,121.554761&ie=UTF8&0&om=0&output=kml
and tried to add dirflg = & rB the URL to show the public transport but server responded with the empty kml.
Does anyone know how to help me?

assuming that you are asking this for android, you can use the following intent
Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse("http://maps.google.com/maps?saddr=20.344,34.34&daddr=20.5666,45.345")); startActivity(intent);
where saddr and daddr are starting and destination address's location coordinates.
same has been discussed in several threads already