RCApp: black background on Android lower API 17 in WindFragment

mobile/com.sap.sailing.racecommittee.app/res/drawable/border_white.xml

@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-    android:shape="rectangle">
-
-    <corners
-        android:bottomLeftRadius="0dp"
-        android:bottomRightRadius="0dp"
-        android:topLeftRadius="0dp"
-        android:topRightRadius="0dp" />
-
-    <stroke
-        android:width="@dimen/thin_line"
-        android:color="@color/constant_white" />
-</shape>

mobile/com.sap.sailing.racecommittee.app/res/drawable/button_border_light.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item android:state_pressed="true">
+        <shape>
+            <stroke
+                android:width="1dp"
+                android:color="@color/constant_white"/>
+
+            <solid android:color="@color/constant_sap_yellow_1"/>
+        </shape>
+    </item>
+
+    <item>
+        <shape>
+            <stroke
+                android:width="1dp"
+                android:color="@color/constant_white"/>
+
+            <solid android:color="@android:color/transparent"/>
+        </shape>
+    </item>
+</selector>

mobile/com.sap.sailing.racecommittee.app/res/layout/wind_view.xml

@@ -251,7 +251,7 @@
                             android:layout_width="wrap_content"
                             android:layout_height="wrap_content"
                             android:layout_centerInParent="true"
-                            android:background="@drawable/border_white"
+                            android:background="@drawable/button_border_light"
                             android:padding="@dimen/default_padding"
                             android:text="@string/wind_enter_position"
                             android:textAllCaps="true"

mobile/com.sap.sailing.racecommittee.app/res/values-de/strings.xml

@@ -281,7 +281,7 @@
     <string name="time_golf">Golf\n(Minuten)</string>
     <string name="time_launch">Gate Launch\n(Minuten)</string>
     <string name="time_total">Gesamt\n(Minuten)</string>
-    <string name="wind_enter_position">Setze Deine Position</string>
+    <string name="wind_enter_position">Setze Deine\nPosition</string>
     <string name="wind_from">Kommt aus</string>
     <string name="wind_off">Keine Windsensoren</string>
     <string name="wind_on">Windsensoren aktiv</string>