altosdroid: Add imperial unit support

[fw/altos] / altosdroid / src / org / altusmetrum / AltosDroid / AltosDroidPreferences.java

diff --git a/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidPreferences.java b/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidPreferences.java
index 72b8488bfbb85c395eef0b0b5e1d5528021565f5..9cef131905abad0c1437dc1722aa155a0cbfba38 100644 (file)
--- a/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidPreferences.java
+++ b/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidPreferences.java
@@ -27,6 +27,9 @@ public class AltosDroidPreferences extends AltosPreferences {
        static String active_device_address;
 
        public static void init(Context context) {
+               if (backend != null)
+                       return;
+
                AltosPreferences.init(new AltosDroidPreferencesBackend(context));
 
                active_device_address = backend.getString(activeDevicePreference, null);