Exports, some Kotlin stuff, and version 1.0-beta15

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

@@ -119,4 +119,6 @@ Als Alternative kann in den Einstellungen ein vertrauenswürdiger Knoten konfigu
     <string name="cleanup_summary">Veraltete Inventareinträge werden entfernt</string>
     <string name="wait_for_wifi">Auf W-LAN warten</string>
     <string name="error_msg_recipient_missing">Bitte Empfänger angeben</string>
+    <string name="export_data">Export</string>
+    <string name="export_data_summary">Alle Nachrichten und Kontakte exportieren (aber keine Identitäten)</string>
 </resources>

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

@@ -118,4 +118,6 @@ As an alternative you could configure a trusted node in the settings, but as of
     <string name="cleanup_notification_end">Cleanup finished</string>
     <string name="wait_for_wifi">Wait for Wi-Fi</string>
     <string name="error_msg_recipient_missing">Please set a recipient</string>
+    <string name="export_data">Export</string>
+    <string name="export_data_summary">Export all messages and contacts (but not identities)</string>
 </resources>

app/src/main/res/xml/file_paths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <files-path name="exports" path="exports/"/>
+</paths>

app/src/main/res/xml/preferences.xml

@@ -41,6 +41,11 @@
         android:title="@string/cleanup"
         android:summary="@string/cleanup_summary"
         />
+    <Preference
+        android:key="export"
+        android:title="@string/export_data"
+        android:summary="@string/export_data_summary"
+        />
     <Preference
         android:key="status"
         android:summary="@string/status_summary"