fix #2317: NPE while backuping data

The previous fix for #2317 was incomplete, as the dependency of the
CentralBackupAgent onto Settings caused a NPE because Settings static
initializations require that an application has been created, which is
apparently not the case when a backup is launched by the OS.

The preference name has been isolated into a no-dependency package so
that the CentralBackupAgent does not depend on an application existing
anymore.

1 files changed, 2 insertions, 2 deletions

diff --git a/main/src/cgeo/geocaching/backup/CentralBackupAgent.java b/main/src/cgeo/geocaching/backup/CentralBackupAgent.java
index f6b9024..28a668c 100644
--- a/main/src/cgeo/geocaching/backup/CentralBackupAgent.java
+++ b/main/src/cgeo/geocaching/backup/CentralBackupAgent.java
@@ -1,6 +1,6 @@
 package cgeo.geocaching.backup;
 
-import cgeo.geocaching.Settings;
+import cgeo.geocaching.utils.ApplicationSettings;
 
 import android.annotation.TargetApi;
 import android.app.backup.BackupAgentHelper;
@@ -13,7 +13,7 @@ public class CentralBackupAgent extends BackupAgentHelper {
 
     @Override
     public void onCreate() {
-        final SharedPreferencesBackupHelper helper = new SharedPreferencesBackupHelper(this, Settings.getPreferencesName());
+        final SharedPreferencesBackupHelper helper = new SharedPreferencesBackupHelper(this, ApplicationSettings.getPreferencesName());
         addHelper(PREFS_BACKUP_KEY, helper);
     }