Merge branch 'develop' into imperial-system

app/src/main/java/com/a1/nextlocation/MainActivity.java

@@ -1,18 +1,17 @@
 package com.a1.nextlocation;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.fragment.app.DialogFragment;
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentManager;
-
 import android.app.Activity;
-import android.app.AlertDialog;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.ImageButton;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.DialogFragment;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+
 import com.a1.nextlocation.fragments.HelpPopup;
 import com.a1.nextlocation.fragments.HomeFragment;
 import com.a1.nextlocation.fragments.Refreshable;
@@ -33,6 +32,7 @@ public class MainActivity extends AppCompatActivity implements Refreshable {
 
     /**
      * onCreate method that creates the main activity
+     *
      * @param savedInstanceState the saved instance state of the app
      */
     @Override
@@ -67,6 +67,7 @@ public class MainActivity extends AppCompatActivity implements Refreshable {
 
     /**
      * loads the saved language from SharedPreferences
+     *
      * @return the language as string
      */
     private String loadLocale() {
@@ -76,6 +77,7 @@ public class MainActivity extends AppCompatActivity implements Refreshable {
 
     /**
      * sets the language of the application to the desired one
+     *
      * @param language the desired language
      */
     private void setLocale(String language) {
@@ -87,7 +89,7 @@ public class MainActivity extends AppCompatActivity implements Refreshable {
     }
 
 
-    private BottomNavigationView.OnNavigationItemSelectedListener navListener = item -> {
+    private final BottomNavigationView.OnNavigationItemSelectedListener navListener = item -> {
         Fragment selectedFragment = null;
 
         switch (item.getItemId()) {
@@ -119,7 +121,7 @@ public class MainActivity extends AppCompatActivity implements Refreshable {
         bottomNav.setSelectedItemId(id);
     }
 
-    private View.OnClickListener onInfoClickListener = new View.OnClickListener() {
+    private final View.OnClickListener onInfoClickListener = new View.OnClickListener() {
         @Override
         public void onClick(View v) {
 

app/src/main/java/com/a1/nextlocation/data/Data.java

@@ -20,7 +20,7 @@ public enum Data {
         this.zoom = zoom;
     }
 
-    private ArrayList<String> visitedNames = new ArrayList<>();
+    private final ArrayList<String> visitedNames = new ArrayList<>();
 
     public void addDistance(double d) {
         distanceTraveled += d;
@@ -51,5 +51,4 @@ public enum Data {
     }
 
 
-
 }

app/src/main/java/com/a1/nextlocation/data/FileIO.java

@@ -2,28 +2,15 @@ package com.a1.nextlocation.data;
 
 import android.content.Context;
 import android.content.res.AssetManager;
-import android.os.Environment;
 import android.util.Log;
 
 import com.google.gson.Gson;
-import com.google.gson.reflect.TypeToken;
-
-import org.json.JSONArray;
 
 import java.io.BufferedReader;
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-import java.io.Reader;
 import java.lang.reflect.Type;
-import java.nio.charset.Charset;
-import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Paths;
 import java.util.Arrays;
 
 public class FileIO<T> {

app/src/main/java/com/a1/nextlocation/data/Location.java

@@ -119,6 +119,7 @@ public class Location implements Parcelable {
 
     /**
      * calculates the distance between two coordinates
+     *
      * @param lat1 the first latitude
      * @param lon1 the first longitude
      * @param lat2 the second latitude
@@ -139,18 +140,18 @@ public class Location implements Parcelable {
 
         double c = 2 * Math.asin(Math.sqrt(a));
 
+        double distance;
         // Radius of earth in kilometers. Use 3956
         // for miles
 //        if(miles) {
 //            double r = 3956;
+//            distance = c * r;
 //        }
 //        else {
         double r = 6371;
-//        }
+        distance = c * r;
-        // calculate the result
-        double distance = c * r;
-
         distance *= 1000;
+//        }
         return Math.floor(distance);
     }
 

app/src/main/java/com/a1/nextlocation/data/RouteHandler.java

@@ -61,6 +61,7 @@ public enum RouteHandler {
     public boolean isFollowingRoute(Route route) {
         return isFollowingRoute && route.equals(currentRoute);
     }
+
     public void setFollowingRoute(boolean followingRoute) {
         isFollowingRoute = followingRoute;
     }

app/src/main/java/com/a1/nextlocation/fragments/CouponFragment.java

@@ -2,17 +2,16 @@ package com.a1.nextlocation.fragments;
 
 import android.app.AlertDialog;
 import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageButton;
 
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentActivity;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageButton;
-
 import com.a1.nextlocation.R;
 import com.a1.nextlocation.data.Coupon;
 import com.a1.nextlocation.recyclerview.CouponAdapter;
@@ -64,6 +63,7 @@ public class CouponFragment extends Fragment {
 
     /**
      * shows the popup of a coupon
+     *
      * @param coupon the coupon that will be displayed
      */
     private void showPopup(Coupon coupon) {

app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java

@@ -2,7 +2,6 @@ package com.a1.nextlocation.fragments;
 
 
 import android.Manifest;
-import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.graphics.drawable.Drawable;
@@ -12,7 +11,6 @@ import android.location.LocationManager;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.LayoutInflater;
-import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageButton;
@@ -26,17 +24,15 @@ import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentActivity;
 
 import com.a1.nextlocation.R;
-import com.a1.nextlocation.data.RouteHandler;
 import com.a1.nextlocation.data.Data;
+import com.a1.nextlocation.data.RouteHandler;
 import com.a1.nextlocation.json.DirectionsResult;
 import com.a1.nextlocation.network.ApiHandler;
-import com.a1.nextlocation.network.DirectionsListener;
 import com.a1.nextlocation.recyclerview.LocationListManager;
 
 import org.osmdroid.api.IMapController;
 import org.osmdroid.config.Configuration;
 import org.osmdroid.util.GeoPoint;
-import org.osmdroid.views.CustomZoomButtonsController;
 import org.osmdroid.views.MapView;
 import org.osmdroid.views.overlay.ItemizedIconOverlay;
 import org.osmdroid.views.overlay.Overlay;

app/src/main/java/com/a1/nextlocation/fragments/LocationDetailFragment.java

@@ -1,11 +1,6 @@
 package com.a1.nextlocation.fragments;
 
-import android.content.Context;
 import android.os.Bundle;
-
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentActivity;
-
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -14,6 +9,9 @@ import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+
 import com.a1.nextlocation.R;
 import com.a1.nextlocation.data.Location;
 import com.a1.nextlocation.recyclerview.LocationListManager;

app/src/main/java/com/a1/nextlocation/fragments/LocationFragment.java

@@ -1,17 +1,16 @@
 package com.a1.nextlocation.fragments;
 
 import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageButton;
 
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentActivity;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageButton;
-
 import com.a1.nextlocation.R;
 import com.a1.nextlocation.data.Location;
 import com.a1.nextlocation.recyclerview.LocationAdapter;

app/src/main/java/com/a1/nextlocation/fragments/RouteDetailFragment.java

@@ -3,19 +3,18 @@ package com.a1.nextlocation.fragments;
 import android.annotation.SuppressLint;
 import android.content.Context;
 import android.os.Bundle;
-
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentActivity;
-
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ImageButton;
 import android.widget.Button;
+import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+
 import com.a1.nextlocation.R;
 import com.a1.nextlocation.data.Location;
 import com.a1.nextlocation.data.Route;
@@ -38,6 +37,7 @@ public class RouteDetailFragment extends Fragment {
         if (context instanceof Refreshable)
             this.refreshable = (Refreshable) context;
     }
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -83,6 +83,7 @@ public class RouteDetailFragment extends Fragment {
 
     /**
      * Button onclick method that starts the route that is being viewed.
+     *
      * @param view the button
      */
     public void startRoute(View view) {
@@ -95,6 +96,7 @@ public class RouteDetailFragment extends Fragment {
 
     /**
      * Calculates the distance between points
+     *
      * @param route the route that is calculated
      * @return the total distance of a route
      */

app/src/main/java/com/a1/nextlocation/fragments/RouteFragment.java

@@ -1,6 +1,10 @@
 package com.a1.nextlocation.fragments;
 
 import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageButton;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -9,23 +13,12 @@ import androidx.fragment.app.FragmentActivity;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
-import android.util.Log;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageButton;
-
 import com.a1.nextlocation.R;
 import com.a1.nextlocation.data.Route;
 import com.a1.nextlocation.recyclerview.RouteAdapter;
 import com.a1.nextlocation.recyclerview.RouteListManager;
 
 import java.util.List;
-import com.a1.nextlocation.data.Location;
-import com.a1.nextlocation.data.Route;
-import com.a1.nextlocation.json.DirectionsResult;
-import com.a1.nextlocation.network.ApiHandler;
-import com.a1.nextlocation.network.DirectionsListener;
 
 public class RouteFragment extends Fragment {
     private static final String TAG = RouteFragment.class.getCanonicalName();

app/src/main/java/com/a1/nextlocation/fragments/SettingsFragment.java

@@ -5,12 +5,6 @@ import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.os.Bundle;
-
-import androidx.appcompat.widget.SwitchCompat;
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentActivity;
-import androidx.fragment.app.FragmentTransaction;
-
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -19,6 +13,11 @@ import android.widget.ArrayAdapter;
 import android.widget.ImageView;
 import android.widget.Spinner;
 
+import androidx.appcompat.widget.SwitchCompat;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.fragment.app.FragmentTransaction;
+
 import com.a1.nextlocation.R;
 
 import org.jetbrains.annotations.NotNull;
@@ -90,6 +89,7 @@ public class SettingsFragment extends Fragment {
         }
 
         //Changes the font settings depending on the state of the toggle
+
         fontSwitch.setOnClickListener(view1 -> {
             if(fontSwitch.isChecked())
             {
@@ -126,6 +126,7 @@ public class SettingsFragment extends Fragment {
                     refresh();
                 }
             }
+
             @Override
             public void onNothingSelected(AdapterView<?> parent) {
             }

app/src/main/java/com/a1/nextlocation/fragments/StatisticFragment.java

@@ -3,17 +3,16 @@ package com.a1.nextlocation.fragments;
 import android.annotation.SuppressLint;
 import android.content.Context;
 import android.os.Bundle;
-
-import androidx.constraintlayout.widget.ConstraintLayout;
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentActivity;
-
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.constraintlayout.widget.ConstraintLayout;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+
 import com.a1.nextlocation.R;
 import com.a1.nextlocation.data.Coupon;
 import com.a1.nextlocation.data.Data;
@@ -37,6 +36,9 @@ public class StatisticFragment extends Fragment {
         initializeDistanceTextView(view);
         TextView locs = view.findViewById(R.id.statistics_locations_visited);
         TextView timeText = view.findViewById(R.id.statistics_time_value);
+      
+        double dist = Data.INSTANCE.getDistanceTraveled() / 1000;
+        distance.setText("" + String.format("%.1f", dist) + " km");
         locs.setText("" + Data.INSTANCE.getLocationsVisited());
 
         long seconds = Data.INSTANCE.getTotalTime() / 1000;
@@ -44,7 +46,7 @@ public class StatisticFragment extends Fragment {
         long p2 = seconds / 60;
         long p3 = p2 % 60;
         p2 = p2 / 60;
-        timeText.setText(p2 + ":" + p3 + ":" + p1);
+        timeText.setText(p2 + "u, " + p3 + "m, " + p1 + "s");
 
 
         //loads the couponList

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

@@ -10,10 +10,8 @@ import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 import com.google.gson.JsonPrimitive;
 
-import org.json.JSONArray;
 import org.osmdroid.util.GeoPoint;
 
-import java.lang.reflect.Array;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -24,7 +22,7 @@ public class DirectionsResult {
     private double distance;
     private double duration;
     private double[][] wayPointCoordinates;
-    private GeoPoint[] startAndEndPoint = new GeoPoint[2];
+    private final GeoPoint[] startAndEndPoint = new GeoPoint[2];
 
     public List<DirectionsStep> getSteps() {
         return steps;
@@ -60,6 +58,7 @@ public class DirectionsResult {
 
     /**
      * converts all the geopoints in all the steps into an arraylist to display it on the map
+     *
      * @return the list of geopoints
      */
     public ArrayList<GeoPoint> getGeoPoints() {
@@ -110,6 +109,7 @@ public class DirectionsResult {
 
     /**
      * parses the given json string into this object. This method is used for when you have requested directions from the API for a {@link com.a1.nextlocation.data.Route route object}
+     *
      * @param json the json string
      */
     public void parseRoute(String json) {
@@ -147,6 +147,7 @@ public class DirectionsResult {
 
     /**
      * parses different segments, and the steps in it using {@link DirectionsResult#parseSteps(JsonArray, Gson) the method for parsing steps}
+     *
      * @param segments the segments to parse
      * @param gson     the gson object to use
      */
@@ -166,6 +167,7 @@ public class DirectionsResult {
 
     /**
      * parses the given steps into this object, transforms them into a {@link DirectionsStep} object.
+     *
      * @param steps the steps to parse
      * @param gson  the gson object to use
      */

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

@@ -2,9 +2,6 @@ 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
  */

app/src/main/java/com/a1/nextlocation/network/ApiHandler.java

@@ -6,13 +6,11 @@ import com.a1.nextlocation.data.Location;
 import com.a1.nextlocation.data.Route;
 import com.a1.nextlocation.json.DirectionsResult;
 import com.google.gson.Gson;
-import com.google.gson.JsonObject;
 
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
-import java.util.concurrent.atomic.AtomicReference;
 
 import okhttp3.MediaType;
 import okhttp3.OkHttpClient;
@@ -27,19 +25,20 @@ public enum ApiHandler {
     INSTANCE;
 
 
-    private static String TAG = ApiHandler.class.getCanonicalName();
+    private static final String TAG = ApiHandler.class.getCanonicalName();
 
     public static final MediaType JSON = MediaType.get("application/json; charset=utf-8");
     private final String BASE_URL = "https://api.openrouteservice.org/v2/directions/";
     private final String API_KEY = "5b3ce3597851110001cf6248d4eee2099f724255918adc71cc502b2a";
     private final String DIRECTIONS_MODE = "foot-walking";
 
-    private List<DirectionsListener> listeners = new ArrayList<>();
+    private final List<DirectionsListener> listeners = new ArrayList<>();
 
-    private OkHttpClient client = new OkHttpClient();
+    private final OkHttpClient client = new OkHttpClient();
 
     /**
      * gets directions from the start location to the end location
+     *
      * @param startLocation the start location
      * @param endLocation   the end location
      */
@@ -49,6 +48,7 @@ public enum ApiHandler {
 
     /**
      * gets directions from the start location latitude and longitude and the end location latitude and longitude
+     *
      * @param startLat  the start latitude
      * @param startLong the start longitude
      * @param endLat    the end latitude
@@ -60,6 +60,7 @@ public enum ApiHandler {
 
     /**
      * Gets the directions from the start location to the end location. An example location would be "3.543543,5.7675765"
+     *
      * @param startLocation the start location represented as <i>startlat,startlong</i>
      * @param endLocation   the end location represented as <i>endlat,endlong</i>
      */
@@ -108,6 +109,7 @@ public enum ApiHandler {
 
     /**
      * adds a listener for when a result of an api call is available
+     *
      * @param listener the new listener
      */
     public void addListener(DirectionsListener listener) {
@@ -116,6 +118,7 @@ public enum ApiHandler {
 
     /**
      * gets directions for the given {@link Route}
+     *
      * @param route the route to get directions for
      */
     public void getDirections(Route route) {
@@ -182,6 +185,4 @@ public enum ApiHandler {
     }
 
 
-
-
 }

app/src/main/java/com/a1/nextlocation/network/DirectionsListener.java

@@ -1,6 +1,5 @@
 package com.a1.nextlocation.network;
 
-import com.a1.nextlocation.data.Route;
 import com.a1.nextlocation.json.DirectionsResult;
 
 public interface DirectionsListener {

app/src/main/java/com/a1/nextlocation/recyclerview/CouponAdapter.java

@@ -1,9 +1,9 @@
 package com.a1.nextlocation.recyclerview;
 
 import android.content.Context;
+import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.LayoutInflater;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
@@ -16,8 +16,8 @@ import java.util.List;
 
 public class CouponAdapter extends RecyclerView.Adapter<CouponAdapter.CouponViewHolder> {
 
-    private Context appContext;
+    private final Context appContext;
-    private List<Coupon> couponList;
+    private final List<Coupon> couponList;
     private OnItemClickListener clickListener;
 
     public interface OnItemClickListener {
@@ -35,6 +35,7 @@ public class CouponAdapter extends RecyclerView.Adapter<CouponAdapter.CouponView
 
         /**
          * Sets the text of the coupon
+         *
          * @param text the text that will be set
          */
         public void setTextViewName(String text) {

app/src/main/java/com/a1/nextlocation/recyclerview/CouponLoader.java

@@ -20,6 +20,7 @@ public class CouponLoader implements Loader<List<Coupon>> {
 
     /**
      * Loads the Arraylist of coupons out of the JSON
+     *
      * @return Arraylist of coupons
      */
     @Override
@@ -32,7 +33,8 @@ public class CouponLoader implements Loader<List<Coupon>> {
         if (!selectedLanguage.equals("en")) {
             fileName += "-" + selectedLanguage;
         }
-        ArrayList<Coupon> res = fileIO.readFileData(context, fileName + ".json", new TypeToken<ArrayList<Coupon>>(){}.getType());
+        ArrayList<Coupon> res = fileIO.readFileData(context, fileName + ".json", new TypeToken<ArrayList<Coupon>>() {
+        }.getType());
         Log.d(TAG, "load: " + res);
 
         return res == null ? new ArrayList<>() : res;

app/src/main/java/com/a1/nextlocation/recyclerview/LocationAdapter.java

@@ -17,9 +17,9 @@ import java.util.List;
 
 public class LocationAdapter extends RecyclerView.Adapter<LocationAdapter.LocationViewHolder> {
 
-    private Context appContext;
+    private final Context appContext;
-    private List<Location> locationList;
+    private final List<Location> locationList;
-    private OnItemClickListener clickListener;
+    private final OnItemClickListener clickListener;
 
     public interface OnItemClickListener {
         void onItemClick(int clickedPosition);
@@ -44,6 +44,7 @@ public class LocationAdapter extends RecyclerView.Adapter<LocationAdapter.Locati
 
         /**
          * Sets the text of the location name
+         *
          * @param text the text that will be set
          */
         public void setTextViewText(String text) {
@@ -53,6 +54,7 @@ public class LocationAdapter extends RecyclerView.Adapter<LocationAdapter.Locati
 
         /**
          * Sets the image of the locatoin
+         *
          * @param text the text of the image filename
          */
         public void setImageViewImage(String text) {

app/src/main/java/com/a1/nextlocation/recyclerview/LocationListManager.java

@@ -4,8 +4,6 @@ import android.content.Context;
 
 import com.a1.nextlocation.data.Location;
 
-import org.osmdroid.util.GeoPoint;
-
 import java.util.ArrayList;
 import java.util.List;
 

app/src/main/java/com/a1/nextlocation/recyclerview/LocationLoader.java

@@ -7,7 +7,6 @@ import com.a1.nextlocation.data.Location;
 import com.google.gson.reflect.TypeToken;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
 public class LocationLoader implements Loader<List<Location>> {
@@ -19,6 +18,7 @@ public class LocationLoader implements Loader<List<Location>> {
 
     /**
      * loads the array list from a JSON file
+     *
      * @return array list with locations
      */
     @Override
@@ -32,7 +32,8 @@ public class LocationLoader implements Loader<List<Location>> {
             fileName += "-" + selectedLanguage;
         }
 
-        ArrayList<Location> res = fileIO.readFileData(context,fileName + ".json",new TypeToken<ArrayList<Location>>(){}.getType());
+        ArrayList<Location> res = fileIO.readFileData(context, fileName + ".json", new TypeToken<ArrayList<Location>>() {
+        }.getType());
 
         return res == null ? new ArrayList<>() : res;
     }

app/src/main/java/com/a1/nextlocation/recyclerview/RouteAdapter.java

@@ -1,7 +1,6 @@
 package com.a1.nextlocation.recyclerview;
 
 import android.content.Context;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -11,16 +10,15 @@ import androidx.annotation.NonNull;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.a1.nextlocation.R;
-import com.a1.nextlocation.data.Location;
 import com.a1.nextlocation.data.Route;
 
 import java.util.List;
 
 public class RouteAdapter extends RecyclerView.Adapter<RouteAdapter.RouteViewHolder> {
 
-    private Context appContext;
+    private final Context appContext;
-    private List<Route> routeList;
+    private final List<Route> routeList;
-    private CouponAdapter.OnItemClickListener clickListener;
+    private final CouponAdapter.OnItemClickListener clickListener;
 
     public interface OnItemClickListener {
         void onItemClick(int clickedPosition);
@@ -43,6 +41,7 @@ public class RouteAdapter extends RecyclerView.Adapter<RouteAdapter.RouteViewHol
 
         /**
          * sets the text of the route name
+         *
          * @param text the text that will be set
          */
         public void setTextViewText(String text) {

app/src/main/java/com/a1/nextlocation/recyclerview/RouteLoader.java

@@ -3,12 +3,10 @@ package com.a1.nextlocation.recyclerview;
 import android.content.Context;
 
 import com.a1.nextlocation.data.FileIO;
-import com.a1.nextlocation.data.Location;
 import com.a1.nextlocation.data.Route;
 import com.google.gson.reflect.TypeToken;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
 public class RouteLoader implements Loader<List<Route>> {
@@ -20,6 +18,7 @@ public class RouteLoader implements Loader<List<Route>> {
 
     /**
      * loads an array list from a JSON
+     *
      * @return an array list with routes
      */
     @Override
@@ -34,7 +33,8 @@ public class RouteLoader implements Loader<List<Route>> {
             fileName += "-" + selectedLanguage;
         }
 
-        ArrayList<Route> res = fileIO.readFileData(context, fileName + ".json",new TypeToken<ArrayList<Route>>(){}.getType());
+        ArrayList<Route> res = fileIO.readFileData(context, fileName + ".json", new TypeToken<ArrayList<Route>>() {
+        }.getType());
         return res == null ? new ArrayList<>() : res;
 
     }