From 311a794a69da95b1e225dc28858683cc841820f8 Mon Sep 17 00:00:00 2001
From: Sem van der Hoeven <semmer99@gmail.com>
Date: Thu, 17 Dec 2020 11:18:23 +0100
Subject: [PATCH 1/5] removed loader from route list manager

---
 .../com/a1/nextlocation/recyclerview/RouteListManager.java | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/RouteListManager.java b/app/src/main/java/com/a1/nextlocation/recyclerview/RouteListManager.java
index 77f4513..d958c24 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/RouteListManager.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/RouteListManager.java
@@ -4,7 +4,7 @@ import com.a1.nextlocation.data.Route;
 
 import java.util.List;
 
-public class RouteListManager implements Loader{
+public class RouteListManager {
 
     List<Route> routes;
 
@@ -19,9 +19,4 @@ public class RouteListManager implements Loader{
     public void setRoutes(List<Route> routes) {
         this.routes = routes;
     }
-
-    @Override
-    public void load() {
-
-    }
 }

From b52c5556d296d5c83eee08b09dd3594faf57f990 Mon Sep 17 00:00:00 2001
From: Sem van der Hoeven <semmer99@gmail.com>
Date: Thu, 17 Dec 2020 11:50:31 +0100
Subject: [PATCH 2/5] finished loading

---
 app/src/main/assets/coupons.json                  |  3 +++
 app/src/main/assets/locations.json                |  8 ++++++++
 app/src/main/assets/routes.json                   |  3 +++
 .../java/com/a1/nextlocation/data/FileIO.java     |  8 ++++++--
 .../a1/nextlocation/fragments/HomeFragment.java   |  5 +++++
 .../nextlocation/recyclerview/CouponLoader.java   | 13 ++++++-------
 .../nextlocation/recyclerview/LocationLoader.java | 15 +++++++--------
 .../a1/nextlocation/recyclerview/RouteLoader.java | 14 +++++++-------
 8 files changed, 45 insertions(+), 24 deletions(-)
 create mode 100644 app/src/main/assets/coupons.json
 create mode 100644 app/src/main/assets/locations.json
 create mode 100644 app/src/main/assets/routes.json

diff --git a/app/src/main/assets/coupons.json b/app/src/main/assets/coupons.json
new file mode 100644
index 0000000..c44dc44
--- /dev/null
+++ b/app/src/main/assets/coupons.json
@@ -0,0 +1,3 @@
+[
+
+]
\ No newline at end of file
diff --git a/app/src/main/assets/locations.json b/app/src/main/assets/locations.json
new file mode 100644
index 0000000..bebe62d
--- /dev/null
+++ b/app/src/main/assets/locations.json
@@ -0,0 +1,8 @@
+[
+  {
+    "name": "kees kroket",
+    "coordinates": "2.4654645,6.2342323",
+    "description": "lekkere patatjes",
+    "imageUrl": "R.id.yeet"
+  }
+]
\ No newline at end of file
diff --git a/app/src/main/assets/routes.json b/app/src/main/assets/routes.json
new file mode 100644
index 0000000..c44dc44
--- /dev/null
+++ b/app/src/main/assets/routes.json
@@ -0,0 +1,3 @@
+[
+
+]
\ No newline at end of file
diff --git a/app/src/main/java/com/a1/nextlocation/data/FileIO.java b/app/src/main/java/com/a1/nextlocation/data/FileIO.java
index 5672d74..03ad794 100644
--- a/app/src/main/java/com/a1/nextlocation/data/FileIO.java
+++ b/app/src/main/java/com/a1/nextlocation/data/FileIO.java
@@ -2,6 +2,7 @@ package com.a1.nextlocation.data;
 
 import android.content.Context;
 import android.content.res.AssetManager;
+import android.util.Log;
 
 import com.google.gson.Gson;
 import com.google.gson.reflect.TypeToken;
@@ -14,18 +15,21 @@ import java.nio.file.Files;
 import java.nio.file.Paths;
 
 public class FileIO<T> {
+    private final String TAG = FileIO.class.getCanonicalName();
 
 
-    public Class<T> readFileData(Context context, String fileName) {
+    public T readFileData(Context context, String fileName) {
         Gson gson = new Gson();
         AssetManager am = context.getAssets();
-        Class<T> res = null;
+        T res = null;
         try {
             InputStream is = am.open(fileName);
             InputStreamReader inputStreamReader = new InputStreamReader(is);
             res = gson.fromJson(inputStreamReader,new TypeToken<T>(){}.getType());
+            Log.d(TAG, "readFileData: got object: " + res);
 
         } catch (IOException e) {
+            Log.d(TAG, "readFileData:  exception! " + e.getLocalizedMessage());
             e.printStackTrace();
         }
         return res;
diff --git a/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java b/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
index 2fda536..326f020 100644
--- a/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
+++ b/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
@@ -20,6 +20,8 @@ import androidx.core.content.ContextCompat;
 import androidx.fragment.app.Fragment;
 
 import com.a1.nextlocation.R;
+import com.a1.nextlocation.recyclerview.CouponListManager;
+import com.a1.nextlocation.recyclerview.LocationListManager;
 
 import org.osmdroid.api.IMapController;
 import org.osmdroid.config.Configuration;
@@ -112,6 +114,9 @@ public class HomeFragment extends Fragment {
 
         }
 
+        LocationListManager locationListManager = new LocationListManager(requireContext());
+        locationListManager.load();
+
     }
     private void requestPermissionsIfNecessary(String... permissions) {
         ArrayList<String> permissionsToRequest = new ArrayList<>();
diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/CouponLoader.java b/app/src/main/java/com/a1/nextlocation/recyclerview/CouponLoader.java
index d77a156..f40fd5f 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/CouponLoader.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/CouponLoader.java
@@ -6,21 +6,20 @@ import com.a1.nextlocation.data.Coupon;
 import com.a1.nextlocation.data.FileIO;
 import com.a1.nextlocation.data.Location;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class CouponLoader implements Loader<List<Coupon>> {
     private final Context context;
+
     public CouponLoader(Context context) {
         this.context = context;
     }
+
     @Override
     public List<Coupon> load() {
-        FileIO<List<Coupon>> fileIO = new FileIO<>();
-        try {
-            return fileIO.readFileData(context,"coupons.json").newInstance();
-        } catch (IllegalAccessException | InstantiationException e) {
-            e.printStackTrace();
-        }
-        return null;
+        FileIO<ArrayList<Coupon>> fileIO = new FileIO<>();
+        ArrayList<Coupon> res = fileIO.readFileData(context, "coupons.json");
+        return res == null ? new ArrayList<>() : res;
     }
 }
diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/LocationLoader.java b/app/src/main/java/com/a1/nextlocation/recyclerview/LocationLoader.java
index 6a83ccc..fd570bb 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/LocationLoader.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/LocationLoader.java
@@ -5,9 +5,10 @@ import android.content.Context;
 import com.a1.nextlocation.data.FileIO;
 import com.a1.nextlocation.data.Location;
 
+import java.util.ArrayList;
 import java.util.List;
 
-public class LocationLoader implements Loader<List<Location>>{
+public class LocationLoader implements Loader<List<Location>> {
     private final Context context;
 
     public LocationLoader(Context context) {
@@ -16,12 +17,10 @@ public class LocationLoader implements Loader<List<Location>>{
 
     @Override
     public List<Location> load() {
-        FileIO<List<Location>> fileIO = new FileIO<>();
-        try {
-            return fileIO.readFileData(context,"locations.json").newInstance();
-        } catch (IllegalAccessException | InstantiationException e) {
-            e.printStackTrace();
-        }
-        return null;
+        FileIO<ArrayList<Location>> fileIO = new FileIO<>();
+
+        ArrayList<Location> res = fileIO.readFileData(context, "locations.json");
+        return res == null ? new ArrayList<>() : res;
+
     }
 }
diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/RouteLoader.java b/app/src/main/java/com/a1/nextlocation/recyclerview/RouteLoader.java
index 63f46e3..5b5956f 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/RouteLoader.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/RouteLoader.java
@@ -6,10 +6,12 @@ import com.a1.nextlocation.data.FileIO;
 import com.a1.nextlocation.data.Location;
 import com.a1.nextlocation.data.Route;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class RouteLoader implements Loader<List<Route>> {
     private final Context context;
+
     public RouteLoader(Context context) {
         this.context = context;
     }
@@ -17,12 +19,10 @@ public class RouteLoader implements Loader<List<Route>> {
     @Override
     public List<Route> load() {
 
-        FileIO<List<Route>> fileIO = new FileIO<>();
-        try {
-            return fileIO.readFileData(context,"routes.json").newInstance();
-        } catch (IllegalAccessException | InstantiationException e) {
-            e.printStackTrace();
-        }
-        return null;
+        FileIO<ArrayList<Route>> fileIO = new FileIO<>();
+
+        ArrayList<Route> res = fileIO.readFileData(context, "routes.json");
+        return res == null ? new ArrayList<>() : res;
+
     }
 }

From 17d977bb17377919a81781c2789faddf9f0b6202 Mon Sep 17 00:00:00 2001
From: Sem van der Hoeven <semmer99@gmail.com>
Date: Thu, 17 Dec 2020 13:41:20 +0100
Subject: [PATCH 3/5] fixed loading

---
 app/src/main/assets/coupons.json              |  5 ++++-
 app/src/main/assets/locations.json            |  3 +--
 app/src/main/assets/routes.json               | 13 ++++++++++++-
 .../java/com/a1/nextlocation/data/FileIO.java | 19 +++++++++++++++++--
 .../nextlocation/fragments/HomeFragment.java  |  7 +++++--
 .../recyclerview/CouponLoader.java            | 11 +++++++++--
 .../recyclerview/LocationLoader.java          |  8 +++++---
 .../recyclerview/RouteLoader.java             |  7 ++++---
 8 files changed, 57 insertions(+), 16 deletions(-)

diff --git a/app/src/main/assets/coupons.json b/app/src/main/assets/coupons.json
index c44dc44..39a85db 100644
--- a/app/src/main/assets/coupons.json
+++ b/app/src/main/assets/coupons.json
@@ -1,3 +1,6 @@
 [
-
+  {
+    "code": "2345",
+    "reward": "fdasfasdf"
+  }
 ]
\ No newline at end of file
diff --git a/app/src/main/assets/locations.json b/app/src/main/assets/locations.json
index bebe62d..88cec3e 100644
--- a/app/src/main/assets/locations.json
+++ b/app/src/main/assets/locations.json
@@ -2,7 +2,6 @@
   {
     "name": "kees kroket",
     "coordinates": "2.4654645,6.2342323",
-    "description": "lekkere patatjes",
-    "imageUrl": "R.id.yeet"
+    "description": "lekkere patatjes"
   }
 ]
\ No newline at end of file
diff --git a/app/src/main/assets/routes.json b/app/src/main/assets/routes.json
index c44dc44..9c84f63 100644
--- a/app/src/main/assets/routes.json
+++ b/app/src/main/assets/routes.json
@@ -1,3 +1,14 @@
 [
-
+  {
+    "name": "rondje stad",
+    "locations": [
+      {
+        "name": "kees kroket",
+        "coordinates": "2.4654645,6.2342323",
+        "description": "lekkere patatjes"
+      }
+    ],
+    "totalDistance": 2.3434,
+    "totalTime": 342342
+  }
 ]
\ No newline at end of file
diff --git a/app/src/main/java/com/a1/nextlocation/data/FileIO.java b/app/src/main/java/com/a1/nextlocation/data/FileIO.java
index 03ad794..a47f76e 100644
--- a/app/src/main/java/com/a1/nextlocation/data/FileIO.java
+++ b/app/src/main/java/com/a1/nextlocation/data/FileIO.java
@@ -7,10 +7,12 @@ import android.util.Log;
 import com.google.gson.Gson;
 import com.google.gson.reflect.TypeToken;
 
+import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.Reader;
+import java.lang.reflect.Type;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 
@@ -18,16 +20,29 @@ public class FileIO<T> {
     private final String TAG = FileIO.class.getCanonicalName();
 
 
-    public T readFileData(Context context, String fileName) {
+    public T readFileData(Context context, String fileName, Type typeOf) {
         Gson gson = new Gson();
         AssetManager am = context.getAssets();
         T res = null;
+        StringBuilder sb = new StringBuilder();
         try {
             InputStream is = am.open(fileName);
             InputStreamReader inputStreamReader = new InputStreamReader(is);
-            res = gson.fromJson(inputStreamReader,new TypeToken<T>(){}.getType());
+            BufferedReader reader = new BufferedReader(inputStreamReader);
+            String line;
+            while ((line = reader.readLine())!= null) {
+                sb.append(line);
+            }
+
+
+            Log.d(TAG, "readFileData: got string: " + sb.toString());
+            res = gson.fromJson(sb.toString(),typeOf);
             Log.d(TAG, "readFileData: got object: " + res);
 
+            reader.close();
+            inputStreamReader.close();
+            is.close();
+
         } catch (IOException e) {
             Log.d(TAG, "readFileData:  exception! " + e.getLocalizedMessage());
             e.printStackTrace();
diff --git a/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java b/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
index 326f020..0b7a629 100644
--- a/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
+++ b/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
@@ -20,8 +20,10 @@ import androidx.core.content.ContextCompat;
 import androidx.fragment.app.Fragment;
 
 import com.a1.nextlocation.R;
+import com.a1.nextlocation.data.Route;
 import com.a1.nextlocation.recyclerview.CouponListManager;
 import com.a1.nextlocation.recyclerview.LocationListManager;
+import com.a1.nextlocation.recyclerview.RouteListManager;
 
 import org.osmdroid.api.IMapController;
 import org.osmdroid.config.Configuration;
@@ -114,8 +116,9 @@ public class HomeFragment extends Fragment {
 
         }
 
-        LocationListManager locationListManager = new LocationListManager(requireContext());
-        locationListManager.load();
+        CouponListManager couponListManager = new CouponListManager(requireContext());
+        couponListManager.load();
+        Log.d(TAG, "initMap: " + couponListManager.getCoupon(0).getCode());
 
     }
     private void requestPermissionsIfNecessary(String... permissions) {
diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/CouponLoader.java b/app/src/main/java/com/a1/nextlocation/recyclerview/CouponLoader.java
index f40fd5f..3cfcf13 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/CouponLoader.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/CouponLoader.java
@@ -1,25 +1,32 @@
 package com.a1.nextlocation.recyclerview;
 
 import android.content.Context;
+import android.util.Log;
 
 import com.a1.nextlocation.data.Coupon;
 import com.a1.nextlocation.data.FileIO;
 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 CouponLoader implements Loader<List<Coupon>> {
     private final Context context;
+    private final String TAG = CouponLoader.class.getCanonicalName();
 
     public CouponLoader(Context context) {
         this.context = context;
     }
 
     @Override
-    public List<Coupon> load() {
+    public ArrayList<Coupon> load() {
         FileIO<ArrayList<Coupon>> fileIO = new FileIO<>();
-        ArrayList<Coupon> res = fileIO.readFileData(context, "coupons.json");
+        ArrayList<Coupon> res = fileIO.readFileData(context, "coupons.json",new TypeToken<ArrayList<Coupon>>(){}.getType());
+        Log.d(TAG, "load: " + res);
+
         return res == null ? new ArrayList<>() : res;
+
     }
 }
diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/LocationLoader.java b/app/src/main/java/com/a1/nextlocation/recyclerview/LocationLoader.java
index fd570bb..f56d8fa 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/LocationLoader.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/LocationLoader.java
@@ -4,8 +4,10 @@ import android.content.Context;
 
 import com.a1.nextlocation.data.FileIO;
 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>> {
@@ -16,11 +18,11 @@ public class LocationLoader implements Loader<List<Location>> {
     }
 
     @Override
-    public List<Location> load() {
+    public ArrayList<Location> load() {
         FileIO<ArrayList<Location>> fileIO = new FileIO<>();
 
-        ArrayList<Location> res = fileIO.readFileData(context, "locations.json");
-        return res == null ? new ArrayList<>() : res;
+        ArrayList<Location> res = fileIO.readFileData(context,"locations.json",new TypeToken<ArrayList<Location>>(){}.getType());
 
+        return res == null ? new ArrayList<>() : res;
     }
 }
diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/RouteLoader.java b/app/src/main/java/com/a1/nextlocation/recyclerview/RouteLoader.java
index 5b5956f..df65664 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/RouteLoader.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/RouteLoader.java
@@ -5,8 +5,10 @@ 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>> {
@@ -17,11 +19,10 @@ public class RouteLoader implements Loader<List<Route>> {
     }
 
     @Override
-    public List<Route> load() {
+    public ArrayList<Route> load() {
 
         FileIO<ArrayList<Route>> fileIO = new FileIO<>();
-
-        ArrayList<Route> res = fileIO.readFileData(context, "routes.json");
+        ArrayList<Route> res = fileIO.readFileData(context, "routes.json",new TypeToken<ArrayList<Route>>(){}.getType());
         return res == null ? new ArrayList<>() : res;
 
     }

From 74fb4440ed7da165fa0ae9ee0734eba5e70448b7 Mon Sep 17 00:00:00 2001
From: Sem van der Hoeven <semmer99@gmail.com>
Date: Thu, 17 Dec 2020 13:51:45 +0100
Subject: [PATCH 4/5] made listmanagers enums

---
 app/src/main/assets/locations.json                        | 5 +++++
 app/src/main/java/com/a1/nextlocation/MainActivity.java   | 7 +++++++
 .../java/com/a1/nextlocation/fragments/HomeFragment.java  | 7 +++----
 .../a1/nextlocation/recyclerview/CouponListManager.java   | 7 +++++--
 .../a1/nextlocation/recyclerview/LocationListManager.java | 8 +++++---
 .../a1/nextlocation/recyclerview/RouteListManager.java    | 8 ++++++--
 6 files changed, 31 insertions(+), 11 deletions(-)

diff --git a/app/src/main/assets/locations.json b/app/src/main/assets/locations.json
index 88cec3e..3a2a3c2 100644
--- a/app/src/main/assets/locations.json
+++ b/app/src/main/assets/locations.json
@@ -3,5 +3,10 @@
     "name": "kees kroket",
     "coordinates": "2.4654645,6.2342323",
     "description": "lekkere patatjes"
+  },
+  {
+    "name" : "locatie2",
+    "coordinates": "3.65656,9.564564",
+    "description": "locatie 2"
   }
 ]
\ No newline at end of file
diff --git a/app/src/main/java/com/a1/nextlocation/MainActivity.java b/app/src/main/java/com/a1/nextlocation/MainActivity.java
index ea457cf..983797c 100644
--- a/app/src/main/java/com/a1/nextlocation/MainActivity.java
+++ b/app/src/main/java/com/a1/nextlocation/MainActivity.java
@@ -13,6 +13,9 @@ import com.a1.nextlocation.fragments.HomeFragment;
 import com.a1.nextlocation.fragments.RouteFragment;
 import com.a1.nextlocation.fragments.SettingsFragment;
 import com.a1.nextlocation.fragments.StatisticFragment;
+import com.a1.nextlocation.recyclerview.CouponListManager;
+import com.a1.nextlocation.recyclerview.LocationListManager;
+import com.a1.nextlocation.recyclerview.RouteListManager;
 import com.google.android.material.bottomnavigation.BottomNavigationView;
 
 public class MainActivity extends AppCompatActivity {
@@ -28,6 +31,10 @@ public class MainActivity extends AppCompatActivity {
         BottomNavigationView bottomNav = findViewById(R.id.navbar);
         bottomNav.setOnNavigationItemSelectedListener(navListener);
 
+        LocationListManager.INSTANCE.setContext(this);
+        CouponListManager.INSTANCE.setContext(this);
+        RouteListManager.INSTANCE.setContext(this);
+
         getSupportFragmentManager().beginTransaction().replace(R.id.fragment_layout, new HomeFragment()).commit();
     }
 
diff --git a/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java b/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
index 0b7a629..b012d79 100644
--- a/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
+++ b/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
@@ -100,6 +100,9 @@ public class HomeFragment extends Fragment {
         // add location manager and set the start point
         LocationManager locationManager = (LocationManager) requireActivity().getSystemService(Context.LOCATION_SERVICE);
 
+        LocationListManager.INSTANCE.load();
+
+
         try {
             Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
             GeoPoint startPoint = new GeoPoint(location.getLatitude(), location.getLongitude());
@@ -116,10 +119,6 @@ public class HomeFragment extends Fragment {
 
         }
 
-        CouponListManager couponListManager = new CouponListManager(requireContext());
-        couponListManager.load();
-        Log.d(TAG, "initMap: " + couponListManager.getCoupon(0).getCode());
-
     }
     private void requestPermissionsIfNecessary(String... permissions) {
         ArrayList<String> permissionsToRequest = new ArrayList<>();
diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/CouponListManager.java b/app/src/main/java/com/a1/nextlocation/recyclerview/CouponListManager.java
index 72e7c65..b99f153 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/CouponListManager.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/CouponListManager.java
@@ -4,15 +4,18 @@ import android.content.Context;
 
 import com.a1.nextlocation.data.Coupon;
 
+import java.util.ArrayList;
 import java.util.List;
 
-public class CouponListManager {
+public enum CouponListManager {
+    INSTANCE;
 
     private List<Coupon> couponList;
     private Context context;
 
-    public CouponListManager(Context context){
+    public void setContext(Context context) {
         this.context = context;
+        this.couponList = new ArrayList<>();
     }
 
     public List<Coupon> getCouponList() {
diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/LocationListManager.java b/app/src/main/java/com/a1/nextlocation/recyclerview/LocationListManager.java
index 7ae7c43..9313e36 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/LocationListManager.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/LocationListManager.java
@@ -4,16 +4,18 @@ import android.content.Context;
 
 import com.a1.nextlocation.data.Location;
 
+import java.util.ArrayList;
 import java.util.List;
 
-public class LocationListManager {
+public enum LocationListManager {
+    INSTANCE;
 
     private List<Location> locationList;
     private Context context;
 
-    public LocationListManager(Context context){
+    public void setContext(Context context) {
         this.context = context;
-
+        this.locationList = new ArrayList<>();
     }
 
     public List<Location> getLocationList() {
diff --git a/app/src/main/java/com/a1/nextlocation/recyclerview/RouteListManager.java b/app/src/main/java/com/a1/nextlocation/recyclerview/RouteListManager.java
index b8c4a37..f72fcbe 100644
--- a/app/src/main/java/com/a1/nextlocation/recyclerview/RouteListManager.java
+++ b/app/src/main/java/com/a1/nextlocation/recyclerview/RouteListManager.java
@@ -4,17 +4,21 @@ import android.content.Context;
 
 import com.a1.nextlocation.data.Route;
 
+import java.util.ArrayList;
 import java.util.List;
 
-public class RouteListManager{
+public enum RouteListManager{
+    INSTANCE;
 
     private List<Route> routeList;
     private Context context;
 
-    public RouteListManager(Context context){
+    public void setContext(Context context) {
         this.context = context;
+        this.routeList = new ArrayList<>();
     }
 
+
     public List<Route> getRouteList() {
         return routeList;
     }

From 95a2e4e849e192ce9fac754a14c1dc7f3d646ec8 Mon Sep 17 00:00:00 2001
From: Sem van der Hoeven <semmer99@gmail.com>
Date: Thu, 17 Dec 2020 13:53:00 +0100
Subject: [PATCH 5/5] made list managers load on mainactivity oncreate

---
 app/src/main/java/com/a1/nextlocation/MainActivity.java        | 3 +++
 .../main/java/com/a1/nextlocation/fragments/HomeFragment.java  | 2 --
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/com/a1/nextlocation/MainActivity.java b/app/src/main/java/com/a1/nextlocation/MainActivity.java
index 983797c..9ba6645 100644
--- a/app/src/main/java/com/a1/nextlocation/MainActivity.java
+++ b/app/src/main/java/com/a1/nextlocation/MainActivity.java
@@ -32,8 +32,11 @@ public class MainActivity extends AppCompatActivity {
         bottomNav.setOnNavigationItemSelectedListener(navListener);
 
         LocationListManager.INSTANCE.setContext(this);
+        LocationListManager.INSTANCE.load();
         CouponListManager.INSTANCE.setContext(this);
+        CouponListManager.INSTANCE.load();
         RouteListManager.INSTANCE.setContext(this);
+        RouteListManager.INSTANCE.load();
 
         getSupportFragmentManager().beginTransaction().replace(R.id.fragment_layout, new HomeFragment()).commit();
     }
diff --git a/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java b/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
index b012d79..d6a06b4 100644
--- a/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
+++ b/app/src/main/java/com/a1/nextlocation/fragments/HomeFragment.java
@@ -100,8 +100,6 @@ public class HomeFragment extends Fragment {
         // add location manager and set the start point
         LocationManager locationManager = (LocationManager) requireActivity().getSystemService(Context.LOCATION_SERVICE);
 
-        LocationListManager.INSTANCE.load();
-
 
         try {
             Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);