How can I draw driving directions on Google Maps using the Android SDK?

Draw Driving Directions on Google Maps with Android API v2

When working with Google Maps, it's often necessary to display driving directions between two locations. While drawing a straight line between the points is possible, it does not accurately represent the driving route.

To obtain actual driving directions, consider utilizing a library designed specifically for this purpose. One such library is Android-GoogleDirectionLibrary, available at https://github.com/akexorcist/Android-GoogleDirectionLibrary.

This library simplifies the process of getting driving directions between two points by handling the communication with the Google Maps API. To use it:

1. Add the library as a dependency in your project:

   <code class="xml">dependencies {
    implementation 'com.github.akexorcist:Android-GoogleDirectionLibrary:1.2.8'
   }</code>

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2. Create an instance of the DirectionManager class:

   <code class="java">DirectionManager manager = new DirectionManager();</code>

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3. Set the origin and destination locations:

   <code class="java">manager.setOrigin(new LatLng(12.917745600000000000, 77.623788300000000000))
       .setDestination(new LatLng(12.842056800000000000, 7.663096499999940000)); </code>

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4. Handle the server response using a listener:

   <code class="java">manager.execute(new OnGetDirectionListener() {
    @Override
    public void onDirectionSuccess(Route route) {
        // Handle the direction result successfully
    }
   
    @Override
    public void onDirectionFailure(Throwable t) {
        // Handle the direction failure
    }
   });</code>

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5. Alternatively, you can use a callback:

   <code class="java">manager.execute(new DirectionCallback() {
    @Override
    public void onDirectionSuccess(Direction.Response results, RawResponse rawResponse) {
        // Handle the direction result successfully
    }
   
    @Override
    public void onDirectionFailure(Throwable t) {
        // Handle the direction failure
    }
   });</code>

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The Route object or the Direction.Response object provides access to various details like duration, distance, and a list of waypoints. You can then use this information to draw the driving directions on your map accurately.

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