Add /adressmatching endpoint

lib/main.dart

@@ -114,10 +114,33 @@ class _MyHomePageState extends State<MyHomePage> {
     );
     if (result != null) {
       List<Location> originLoc = await locationFromAddress(result);
+
+      //Match adress with Backend
+      final response = await http.post(
+          Uri.parse('http://10.0.2.2:8080/addressmatching'),
+          body: jsonEncode({"address": result}),
+          headers: <String, String>{"Content-Type": "application/json"});
+      _data = jsonDecode(response.body);
+      var coordinate = _data["coordinate"];
+      print(response.body);
+
+      if (_data.containsKey('error_code') && _data['error_code'] != 0) {
+        switch (_data['error_code']) {
+          case 1:
+            _showMessage(
+                'The address is outside the solution space. Please enter an address within Berlin-Brandenburg.',
+                context);
+            return;
+          case 2:
+            _showMessage('The address could not be found.', context);
+            return;
+        }
+      }
+
       setState(() {
         originText = result;
         _originCoordinates =
-            latlng.LatLng(originLoc[0].latitude, originLoc[0].longitude);
+            latlng.LatLng(coordinate["lat"], coordinate["lon"]);
       });
     }
     // Toggle keyboard
@@ -259,12 +282,7 @@ class _MyHomePageState extends State<MyHomePage> {
       if (_data.containsKey('error_code') && _data['error_code'] != 0) {
         switch (_data['error_code']) {
           case 1:
-            _showMessage(
-                'The address is outside the solution space. Please enter an address within Berlin-Brandenburg.',
-                context);
-            return;
-          case 2:
-            _showMessage('The address could not be found.', context);
+            _showMessage('No route was found.', context);
             return;
         }
       }