diff --git a/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/Service.java b/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/Service.java
index d3b7c03..266115a 100644
--- a/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/Service.java
+++ b/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/Service.java
@@ -1,12 +1,17 @@
 package com.uottawa.olympus.olympusservices;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class Service {
     private String name;
     private double rate;
+    private List<ServiceProvider> serviceProviders;
 
     Service(String name, double rate) {
         this.name = name;
         this.rate = rate;
+        serviceProviders = new ArrayList<ServiceProvider>();
     }
 
     public String getName() {
@@ -24,4 +29,18 @@ public class Service {
     public void setRate(double rate) {
         this.rate = rate;
     }
+
+    public boolean addServiceProvider(ServiceProvider user){
+        for (ServiceProvider listUser : serviceProviders){
+            if (user.getUsername().equals(listUser.getUsername())){
+                return false;
+            }
+        }
+        serviceProviders.add(user);
+        return true;
+    }
+
+    public List<ServiceProvider> getServiceProviders(){
+        return serviceProviders;
+    }
 }
diff --git a/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/ServiceProvider.java b/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/ServiceProvider.java
index 086ccf0..15bfde4 100644
--- a/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/ServiceProvider.java
+++ b/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/ServiceProvider.java
@@ -1,12 +1,31 @@
 package com.uottawa.olympus.olympusservices;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class ServiceProvider extends UserType {
 
+    private List<Service> services;
+
     ServiceProvider(String username, String password, String firstname, String lastname){
         super(username, password, firstname, lastname);
+        services = new ArrayList<>();
     }
 
     public String getRole(){ return "ServiceProvider"; }
 
+    public boolean addService(Service service){
+        for (Service listService : services){
+            if (service.getName().equals(listService.getName())){
+                return false;
+            }
+        }
+        services.add(service);
+        return true;
+    }
+
+    public List<Service> getServices(){
+        return services;
+    }
 
 }
diff --git a/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/ServicesList.java b/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/ServicesList.java
index e070cb1..8f29a44 100644
--- a/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/ServicesList.java
+++ b/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/ServicesList.java
@@ -29,7 +29,7 @@ public class ServicesList extends AppCompatActivity implements NewServiceDialogF
             services[(i+1)*2] = current[0];
             services[(i+1)*2+1] = current[1];
         }
-        ArrayAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, services);
+        ArrayAdapter adapter = new ArrayAdapter<String>(this, R.layout.simple_list_item_1_customized, services);
         GridView gridView = findViewById(R.id.Services);
         gridView.setAdapter(adapter);
         gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
diff --git a/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/UsersList.java b/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/UsersList.java
index e7bbff4..4cb5afb 100644
--- a/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/UsersList.java
+++ b/OlympusServices/app/src/main/java/com/uottawa/olympus/olympusservices/UsersList.java
@@ -26,7 +26,7 @@ public class UsersList extends AppCompatActivity {
             usernames[(i+1)*2] = current[0];
             usernames[(i+1)*2+1] = current[3];
         }
-        ArrayAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, usernames);
+        ArrayAdapter adapter = new ArrayAdapter<String>(this, R.layout.simple_list_item_1_customized, usernames);
         GridView gridView = findViewById(R.id.Users);
         gridView.setAdapter(adapter);
     }
diff --git a/OlympusServices/app/src/main/res/layout/simple_list_item_1_customized.xml b/OlympusServices/app/src/main/res/layout/simple_list_item_1_customized.xml
new file mode 100644
index 0000000..9847704
--- /dev/null
+++ b/OlympusServices/app/src/main/res/layout/simple_list_item_1_customized.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@android:id/text1"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center_vertical"
+    android:minHeight="?android:attr/listPreferredItemHeightSmall"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
+    android:paddingLeft="?android:attr/listPreferredItemPaddingLeft"
+    android:paddingRight="?android:attr/listPreferredItemPaddingRight"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+    android:textAppearance="?android:attr/textAppearanceListItemSmall"
+    android:textColor="@android:color/white">
+
+</TextView>
\ No newline at end of file