Change GridItem background

BIDL/BIDL/app/src/main/res/drawable/grid_item_background.xml

+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item >
+        <shape
+            android:shape="rectangle">
+            <solid android:color="@android:color/darker_gray" />
+            <corners android:radius="5dp"/>
+        </shape>
+    </item>
+    <item android:right="1dp" android:left="1dp" android:bottom="2dp">
+        <shape
+            android:shape="rectangle">
+            <solid android:color="@android:color/white"/>
+            <corners android:radius="5dp"/>
+        </shape>
+    </item>
+</layer-list>
\ No newline at end of file

BIDL/BIDL/app/src/main/res/layout/grid_item.xml

@@ -8,7 +8,7 @@
         android:id="@+id/grid_text"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:background="@color/grey"
+        android:background="@drawable/grid_item_background"
         android:gravity="center"
         android:textSize="20sp"
         android:layout_margin="10dp"