Added comments

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

@@ -1,5 +1,6 @@
 package com.a1.nextlocation.fragments;
 
+import android.annotation.SuppressLint;
 import android.os.Bundle;
 
 import androidx.constraintlayout.widget.ConstraintLayout;
@@ -22,16 +23,12 @@ import java.util.List;
 
 public class StatisticFragment extends Fragment {
 
-    private List<Coupon> couponList;
-    private ImageView imageButton;
-    private ImageView couponButton;
-
-
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
     }
 
+    @SuppressLint({"DefaultLocale", "SetTextI18n"})
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.fragment_statistic, container, false);
@@ -51,24 +48,27 @@ public class StatisticFragment extends Fragment {
         timeText.setText(p2 + ":" + p3 + ":" + p1);
 
 
-        this.couponList = CouponListManager.INSTANCE.getCouponList();
+        //loads the couponList
-        CouponAdapter adapter = new CouponAdapter(this.getContext(), this.couponList);
+        List<Coupon> couponList = CouponListManager.INSTANCE.getCouponList();
+        CouponAdapter adapter = new CouponAdapter(this.getContext(), couponList);
         TextView couponNumber = view.findViewById(R.id.couponAmount);
         couponNumber.setText(String.valueOf(adapter.getItemCount()));
 
-
+        //Initialises the back button
-        this.imageButton = view.findViewById(R.id.statistics_back_button);
+        ImageView backButton = view.findViewById(R.id.statistics_back_button);
-        this.imageButton.setOnClickListener(v -> {
+        backButton.setOnClickListener(v -> {
             HomeFragment homeFragment = new HomeFragment();
             ((FragmentActivity) view.getContext()).getSupportFragmentManager().beginTransaction().replace(R.id.fragment_layout, homeFragment).addToBackStack(null).commit();
         });
 
-        this.couponButton = view.findViewById(R.id.coupon_button);
+        //Initialises the coupon button
-        this.couponButton.setOnClickListener(v -> {
+        ImageView couponButton = view.findViewById(R.id.coupon_button);
+        couponButton.setOnClickListener(v -> {
             CouponFragment couponFragment = new CouponFragment();
             ((FragmentActivity) view.getContext()).getSupportFragmentManager().beginTransaction().replace(R.id.fragment_layout, couponFragment).addToBackStack(null).commit();
         });
 
+        //Makes the constraintlayout clickable and opens the same layout as the coupon button
         ConstraintLayout constraintLayout = view.findViewById(R.id.Box4);
         constraintLayout.setOnClickListener(v -> {
             CouponFragment couponFragment = new CouponFragment();

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

@@ -27,17 +27,19 @@ public class CouponAdapter extends RecyclerView.Adapter<CouponAdapter.CouponView
     class CouponViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
 
         private TextView couponCode;
-        private TextView couponReward;
 
         public CouponViewHolder(@NonNull View itemView) {
             super(itemView);
             itemView.setOnClickListener(this);
         }
 
-
+        /**
+         * Sets the text of the coupon
+         * @param text the text that will be set
+         */
         public void setTextViewName(String text){
-            this.couponReward = itemView.findViewById(R.id.coupon_name);
+            TextView couponReward = itemView.findViewById(R.id.coupon_name);
-            this.couponReward.setText(text);
+            couponReward.setText(text);
         }
 
         @Override

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

@@ -22,10 +22,9 @@ public enum CouponListManager {
         return couponList;
     }
 
-    public Coupon getCoupon(int place) {
+    /**
-        return couponList.get(place);
+     * Prepares the list for loading
-    }
+     */
-
     public void load(){
         CouponLoader couponLoader = new CouponLoader(this.context);
         this.couponList = couponLoader.load();

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

@@ -18,6 +18,10 @@ public class CouponLoader implements Loader<List<Coupon>> {
         this.context = context;
     }
 
+    /**
+     * Loads the Arraylist of coupons out of the JSON
+     * @return Arraylist of coupons
+     */
     @Override
     public ArrayList<Coupon> load() {
         FileIO<ArrayList<Coupon>> fileIO = new FileIO<>();

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

@@ -42,11 +42,19 @@ public class LocationAdapter extends RecyclerView.Adapter<LocationAdapter.Locati
             clickListener.onItemClick(getAdapterPosition());
         }
 
+        /**
+         * Sets the text of the location name
+         * @param text the text that will be set
+         */
         public void setTextViewText(String text){
             this.locationName = itemView.findViewById(R.id.location_name);
-            locationName.setText(text);
+            this.locationName.setText(text);
         }
 
+        /**
+         * Sets the image of the locatoin
+         * @param text the text of the image filename
+         */
         public void setImageViewImage(String text){
             this.locationImage = itemView.findViewById(R.id.location_image);
             Context context = locationImage.getContext();