Added notification to alert the user if data sharing is not enabled, and provide information on why it is good to enable it.

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

@@ -2,11 +2,11 @@
 <!-- Copyright (C) 2009 The Android Open Source Project
           http://www.apache.org/licenses/LICENSE-2.0
 -->
-<ScrollView>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
+    android:layout_height="match_parent">
 
-    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    <LinearLayout
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical"

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

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2009 The Android Open Source Project
+          http://www.apache.org/licenses/LICENSE-2.0
+-->
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="20dip">
+
+<!--
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="16sp"
+        android:autoLink="web"
+        android:text="@string/datasharing_about_title"
+        />
+-->
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingTop="20dip"
+        android:textSize="16sp"
+        android:text="@string/datasharing_about_text"
+        android:autoLink="web"
+        />
+
+</LinearLayout>
+</ScrollView>

app/src/main/res/menu/main_activity_actions.xml

@@ -35,6 +35,13 @@
             android:showAsAction="never|withText"
             android:title="@string/data_sharing_log_in" />
 
+        <item
+            android:id="@+id/action_about_datasharing"
+            android:enabled="true"
+            android:icon="@drawable/ic_action_settings"
+            android:showAsAction="never|withText"
+            android:title="About Data Sharing..." />
+
     </group>
     <group android:id="@+id/grp4">
         <item

app/src/main/res/values/strings.xml

@@ -348,4 +348,20 @@
     <string name="error_server_not_running">ERROR:  OpenSeizureDetector Server is not running - please re-start it</string>
     <string name="system_logs">System Logs</string>
     <string name="logged_in_as_user_id">Logged in as User Id:</string>
+    <string name="datasharing_notification_text">Select for more information</string>
+    <string name="datasharing_notification_title">OpenSeizureDetector Data Sharing Problem</string>
+    <string name="datasharing_about_title">OpenSeizureDetector Data Sharing</string>
+    <string name="datasharing_about_text">
+        Data Sharing is not working correctly.   \n
+        This might be because you have not registered an account and logged in to the data sharing system,\n
+        or it may be a networking problem. \n\n
+        <b>Please register for Data Sharing and Log in using the App menu or button below</b>\n\n
+        This will help with developing OpenSeizureDetector to increase the
+        detection reliability and reduce the false alarm rate\n\n
+        If you would like more information about the data sharing system and privacy policy, please see the
+        Data Sharing page (https://www.openseizuredetector.org.uk/?page_id=1818)
+        \n on the
+        https://openseizuredetector.org.uk web site.
+
+    </string>
 </resources>