Log group assignments more verbosely

app/src/main/java/at/bitfire/davdroid/resource/LocalAddressBook.java

@@ -26,7 +26,9 @@ import java.io.FileNotFoundException;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.logging.Level;
 
+import at.bitfire.davdroid.App;
 import at.bitfire.vcard4android.AndroidAddressBook;
 import at.bitfire.vcard4android.AndroidContact;
 import at.bitfire.vcard4android.AndroidGroup;
@@ -162,8 +164,10 @@ public class LocalAddressBook extends AndroidAddressBook implements LocalCollect
         // find groups without members
         /** should be done using {@link Groups.SUMMARY_COUNT}, but it's not implemented in Android yet */
         for (LocalGroup group : (LocalGroup[])queryGroups(null, null))
-            if (group.getMembers().length == 0)
+            if (group.getMembers().length == 0) {
+                App.log.log(Level.FINE, "Deleting group", group);
                 group.delete();
+            }
     }
 
     public void removeGroups() throws ContactsStorageException {

app/src/main/java/at/bitfire/davdroid/syncadapter/ContactsSyncManager.java

@@ -451,10 +451,12 @@ public class ContactsSyncManager extends SyncManager {
             LocalContact contact = (LocalContact)local;
 
             BatchOperation batch = new BatchOperation(provider);
+            App.log.log(Level.FINE, "Removing contact group memberships");
             contact.removeGroupMemberships(batch);
 
             for (String category : contact.getContact().categories) {
                 long groupID = localAddressBook().findOrCreateGroup(category);
+                App.log.log(Level.FINE, "Adding membership in group " + category + " (" + groupID + ")");
                 contact.addToGroup(batch, groupID);
             }
 

vcard4android

@@ -1 +1 @@
-Subproject commit eae31dac277c1b1d85f5870829fbc0ff1cb49735
+Subproject commit 6eee71f9aac8573f353059879c8fe45f527cc391