added getting directions for whole route

app/src/main/java/com/a1/nextlocation/json/GeometryDecoder.java

@@ -0,0 +1,63 @@
+package com.a1.nextlocation.json;
+
+import com.google.gson.JsonArray;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+
+/**
+ * source: https://github.com/GIScience/openrouteservice-docs#geometry-decoding
+ */
+public class GeometryDecoder {
+
+    public static JsonArray decodeGeometry(String encodedGeometry, boolean inclElevation) {
+        JsonArray geometry = new JsonArray();
+        int len = encodedGeometry.length();
+        int index = 0;
+        int lat = 0;
+        int lng = 0;
+        int ele = 0;
+
+        while (index < len) {
+            int result = 1;
+            int shift = 0;
+            int b;
+            do {
+                b = encodedGeometry.charAt(index++) - 63 - 1;
+                result += b << shift;
+                shift += 5;
+            } while (b >= 0x1f);
+            lat += (result & 1) != 0 ? ~(result >> 1) : (result >> 1);
+
+            result = 1;
+            shift = 0;
+            do {
+                b = encodedGeometry.charAt(index++) - 63 - 1;
+                result += b << shift;
+                shift += 5;
+            } while (b >= 0x1f);
+            lng += (result & 1) != 0 ? ~(result >> 1) : (result >> 1);
+
+
+            if(inclElevation){
+                result = 1;
+                shift = 0;
+                do {
+                    b = encodedGeometry.charAt(index++) - 63 - 1;
+                    result += b << shift;
+                    shift += 5;
+                } while (b >= 0x1f);
+                ele += (result & 1) != 0 ? ~(result >> 1) : (result >> 1);
+            }
+
+            JsonArray location = new JsonArray();
+            location.add(lat / 1E5);
+            location.add(lng / 1E5);
+            if(inclElevation){
+                location.add((float) (ele / 100));
+            }
+            geometry.add(location);
+        }
+        return geometry;
+    }
+}