add a click background to monthly view days

app/src/main/res/layout/fragment_month.xml

@@ -42,6 +42,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -50,6 +51,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -58,6 +60,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -66,6 +69,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -74,6 +78,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -82,6 +87,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -90,6 +96,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
         </LinearLayout>
@@ -107,6 +114,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:visibility="gone"/>
 
             <LinearLayout
@@ -114,6 +122,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -122,6 +131,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -130,6 +140,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -138,6 +149,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -146,6 +158,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -154,6 +167,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -162,6 +176,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
         </LinearLayout>
@@ -186,6 +201,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -194,6 +210,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -202,6 +219,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -210,6 +228,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -218,6 +237,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -226,6 +246,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -234,6 +255,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
         </LinearLayout>
@@ -251,6 +273,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:visibility="gone"/>
 
             <LinearLayout
@@ -258,6 +281,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -266,6 +290,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -274,6 +299,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -282,6 +308,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -290,6 +317,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -298,6 +326,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -306,6 +335,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
         </LinearLayout>
@@ -323,6 +353,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:visibility="gone"/>
 
             <LinearLayout
@@ -330,6 +361,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -338,6 +370,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -346,6 +379,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -354,6 +388,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -362,6 +397,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -370,6 +406,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -378,6 +415,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
         </LinearLayout>
@@ -402,6 +440,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -410,6 +449,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -418,6 +458,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -426,6 +467,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -434,6 +476,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -442,6 +485,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
 
@@ -450,6 +494,7 @@
                 android:layout_width="0dp"
                 android:layout_height="match_parent"
                 android:layout_weight="1"
+                android:background="?attr/selectableItemBackground"
                 android:gravity="center_horizontal"
                 android:orientation="vertical"/>
         </LinearLayout>