[ADD] loaders and fileio read

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

@@ -1,8 +1,26 @@
 package com.a1.nextlocation.recyclerview;
 
-public class CouponLoader implements Loader{
-    @Override
-    public void load() {
+import android.content.Context;
 
+import com.a1.nextlocation.data.Coupon;
+import com.a1.nextlocation.data.FileIO;
+import com.a1.nextlocation.data.Location;
+
+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;
     }
 }