Option to disable buffering (fix #411)

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

@@ -20,6 +20,9 @@
   <string name="settings_status_on">Stop</string>
   <string name="settings_status_off_summary">Service stopped</string>
   <string name="settings_status_on_summary">Service running</string>
+  <string name="settings_buffer">Offline buffering</string>
+  <string name="settings_buffer_off_summary">Buffering off</string>
+  <string name="settings_buffer_on_summary">Buffering on</string>
   <string name="settings_accuracy_title">Location accuracy</string>
   <string name="settings_accuracy_summary">Desired location accuracy</string>
   <string name="settings_accuracy_high">High</string>

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

@@ -31,22 +31,29 @@
     <EditTextPreference
         android:defaultValue="300"
         android:key="interval"
-        android:numeric="integer"
+        android:inputType="number"
         android:summary="@string/settings_interval_summary"
         android:title="@string/settings_interval_title" />
 
     <EditTextPreference
         android:defaultValue="0"
         android:key="distance"
-        android:numeric="integer"
+        android:inputType="number"
         android:summary="@string/settings_distance_summary"
         android:title="@string/settings_distance_title" />
 
     <EditTextPreference
         android:defaultValue="0"
         android:key="angle"
-        android:numeric="integer"
+        android:inputType="number"
         android:summary="@string/settings_angle_summary"
         android:title="@string/settings_angle_title" />
 
+    <CheckBoxPreference
+        android:defaultValue="true"
+        android:key="buffer"
+        android:summaryOff="@string/settings_buffer_off_summary"
+        android:summaryOn="@string/settings_buffer_on_summary"
+        android:title="@string/settings_buffer" />
+
 </PreferenceScreen>