Fixed WeekView canvas under API 28 (Android P)

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

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v7.widget.CardView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="5dip"
+    android:layout_margin="5dip">
+    <TextView
+        android:id="@+id/title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textStyle="bold"
+        android:typeface="sans"
+        tools:text="Test this new stuff!" />
+
+    <TextView
+        android:id="@+id/sub_left"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/title"
+        android:layout_marginTop="5dip"
+        android:textColor="#343434"
+        android:textSize="12sp"
+        tools:text="Peter Bauer" />
+
+    <TextView
+        android:id="@+id/sub_right"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignBaseline="@id/sub_left"
+        android:layout_alignBottom="@id/sub_left"
+        android:textColor="#343434"
+        android:textSize="12sp"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentRight="true"
+        tools:text="20.03.18 18:42 Uhr" />
+
+    <TextView
+        android:id="@+id/top_right"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignBaseline="@id/title"
+        android:layout_alignBottom="@id/title"
+        android:textColor="#343434"
+        android:textSize="12sp"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentRight="true"
+        tools:text="Raum 105"
+        tools:ignore="RelativeOverlap" />
+</android.support.v7.widget.CardView>