Added directions support for languages

Makefile

@@ -97,18 +97,18 @@ directions-fixtures:
 		-o mapbox/libjava-services/src/test/fixtures/directions_v5.json
 
 	# Directions: request annotations
-	curl "https://api.mapbox.com/directions/v5/mapbox/driving/-122.416667,37.783333;-121.900000,37.333333?geometries=polyline&steps=true&annotations=distance,duration,speed&access_token=$(MAPBOX_ACCESS_TOKEN)" \
+	curl "https://api.mapbox.com/directions/v5/mapbox/driving/-122.416667,37.783333;-121.900000,37.333333?geometries=polyline&language=sv&steps=true&annotations=distance,duration,speed&access_token=$(MAPBOX_ACCESS_TOKEN)" \
 		-o mapbox/libjava-services/src/test/fixtures/directions_annotations_v5.json
 
 	# Directions: polyline geometry with precision 6
 	curl "https://api.mapbox.com/directions/v5/mapbox/driving/-122.416667,37.783333;-121.900000,37.333333?geometries=polyline6&steps=true&access_token=$(MAPBOX_ACCESS_TOKEN)" \
 		-o mapbox/libjava-services/src/test/fixtures/directions_v5_precision_6.json
 
-directions-fixtures-rotary:
+	# Directions: route with a rotary
 	curl "https://api.mapbox.com/directions/v5/mapbox/driving/-77.04430818557739,38.908650612656864;-77.04192638397217,38.90963574367117?geometries=polyline&steps=true&access_token=$(MAPBOX_ACCESS_TOKEN)" \
 		-o mapbox/libjava-services/src/test/fixtures/directions_v5_fixtures_rotary.json
 
-directions-traffic-fixtures:
+	# Directions: route with traffic
 	curl "https://api.mapbox.com/directions/v5/mapbox/driving-traffic/-122.416667,37.783333;-121.900000,37.333333?geometries=polyline&steps=true&access_token=$(MAPBOX_ACCESS_TOKEN)" \
 		-o mapbox/libjava-services/src/test/fixtures/directions_v5_traffic.json
 

mapbox/build.gradle

@@ -8,7 +8,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.2'
+        classpath 'com.android.tools.build:gradle:2.3.3'
         classpath 'com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.6.2'
 
         // NOTE: Do not place your application dependencies here; they belong

mapbox/libjava-services-rx/src/main/java/com/mapbox/services/api/rx/directions/v5/DirectionsServiceRx.java

@@ -32,9 +32,10 @@ public interface DirectionsServiceRx {
    *                         the angle of approach
    * @param continueStraight Define whether the route should continue straight even if the route
    *                         will be slower.
-   * @param annotations       An annotations object that contains additional details about each line segment along the
+   * @param annotations      An annotations object that contains additional details about each line segment along the
    *                         route geometry. Each entry in an annotations field corresponds to a coordinate along the
    *                         route geometry.
+   * @param language         Language of returned turn-by-turn text instructions.
    * @return A retrofit Observable object
    * @since 2.0.0
    */
@@ -52,6 +53,7 @@ Observable<DirectionsResponse> getObservable(
     @Query("steps") Boolean steps,
     @Query("bearings") String bearings,
     @Query("continue_straight") Boolean continueStraight,
-    @Query("annotations") String annotations
+    @Query("annotations") String annotations,
+    @Query("language") String language
   );
 }

mapbox/libjava-services-rx/src/main/java/com/mapbox/services/api/rx/directions/v5/MapboxDirectionsRx.java

@@ -65,7 +65,8 @@ public Observable<DirectionsResponse> getObservable() {
       builder.isSteps(),
       builder.getBearings(),
       builder.isContinueStraight(),
-      builder.getAnnotation());
+      builder.getAnnotation(),
+      builder.getLanguage());
 
     // Done
     return observable;

mapbox/libjava-services/src/main/java/com/mapbox/services/api/directions/v5/DirectionsService.java

@@ -35,6 +35,7 @@ public interface DirectionsService {
    * @param annotations      An annotations object that contains additional details about each line segment along the
    *                         route geometry. Each entry in an annotations field corresponds to a coordinate along the
    *                         route geometry.
+   * @param language         Language of returned turn-by-turn text instructions.
    * @return The {@link DirectionsResponse} in a Call wrapper.
    * @since 1.0.0
    */
@@ -53,6 +54,7 @@ Call<DirectionsResponse> getCall(
     @Query("steps") Boolean steps,
     @Query("bearings") String bearings,
     @Query("continue_straight") Boolean continueStraight,
-    @Query("annotations") String annotations
+    @Query("annotations") String annotations,
+    @Query("language") String language
   );
 }

mapbox/libjava-services/src/main/java/com/mapbox/services/api/directions/v5/MapboxDirections.java

@@ -75,7 +75,8 @@ private Call<DirectionsResponse> getCall() {
       builder.isSteps(),
       builder.getBearings(),
       builder.isContinueStraight(),
-      builder.getAnnotation());
+      builder.getAnnotation(),
+      builder.getLanguage());
 
     // Done
     return call;
@@ -147,6 +148,7 @@ public static class Builder<T extends Builder> extends MapboxBuilder {
     private Position origin = null;
     private Position destination = null;
     private String[] annotation = null;
+    private String language = null;
 
     /**
      * Constructor
@@ -157,7 +159,7 @@ public Builder() {
       // Set defaults
       this.user = DirectionsCriteria.PROFILE_DEFAULT_USER;
 
-      // by defauly the geometry is polyline with precision 6.
+      // by default the geometry is polyline with precision 6.
       this.geometries = DirectionsCriteria.GEOMETRY_POLYLINE6;
     }
 
@@ -358,6 +360,19 @@ public T setAnnotation(String... annotation) {
       return (T) this;
     }
 
+    /**
+     * Optionally set the language of returned turn-by-turn text instructions. The default is {@code en} for English.
+     *
+     * @param language The locale in which results should be returned.
+     * @return Builder
+     * @see <a href="https://www.mapbox.com/api-documentation/#instructions-languages">Supported languages</a>
+     * @since 2.2.0
+     */
+    public T setLanguage(String language) {
+      this.language = language;
+      return (T) this;
+    }
+
     /*
      * Getters, they return the value in a format ready for the API to consume
      */
@@ -543,6 +558,14 @@ public String getAnnotation() {
       return TextUtils.join(",", annotation);
     }
 
+    /**
+     * @return The language the turn-by-turn directions will be in.
+     * @since 2.2.0
+     */
+    public String getLanguage() {
+      return language;
+    }
+
     /**
      * Base package name or other simple string identifier
      *