diff --git a/briar-android/src/main/java/org/briarproject/briar/android/privategroup/conversation/GroupViewModel.java b/briar-android/src/main/java/org/briarproject/briar/android/privategroup/conversation/GroupViewModel.java
index 557eb2865..b64dad46a 100644
--- a/briar-android/src/main/java/org/briarproject/briar/android/privategroup/conversation/GroupViewModel.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/privategroup/conversation/GroupViewModel.java
@@ -245,20 +245,16 @@ class GroupViewModel extends ThreadListViewModel<GroupMessageItem> {
 	}
 
 	public void loadSharingContacts() {
-		runOnDbThread(() -> {
-			try {
-				Collection<GroupMember> members =
-						privateGroupManager.getMembers(groupId);
-				Collection<ContactId> contactIds = new ArrayList<>();
-				for (GroupMember m : members) {
-					if (m.getContactId() != null)
-						contactIds.add(m.getContactId());
-				}
-				sharingController.addAll(contactIds);
-			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+		runOnDbThread(true, txn -> {
+			Collection<GroupMember> members =
+					privateGroupManager.getMembers(txn, groupId);
+			Collection<ContactId> contactIds = new ArrayList<>();
+			for (GroupMember m : members) {
+				if (m.getContactId() != null)
+					contactIds.add(m.getContactId());
 			}
-		});
+			txn.attach(() -> sharingController.addAll(contactIds));
+		}, e -> logException(LOG, WARNING, e));
 	}
 
 	void deletePrivateGroup() {
diff --git a/briar-android/src/main/java/org/briarproject/briar/android/sharing/SharingController.java b/briar-android/src/main/java/org/briarproject/briar/android/sharing/SharingController.java
index 9a175534e..3fd3f4e96 100644
--- a/briar-android/src/main/java/org/briarproject/briar/android/sharing/SharingController.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/sharing/SharingController.java
@@ -1,7 +1,6 @@
 package org.briarproject.briar.android.sharing;
 
 import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.db.DatabaseExecutor;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
@@ -28,7 +27,7 @@ public interface SharingController {
 	/**
 	 * Adds a collection of contacts to be tracked.
 	 */
-	@DatabaseExecutor
+	@UiThread
 	void addAll(Collection<ContactId> contacts);
 
 	/**
diff --git a/briar-android/src/main/java/org/briarproject/briar/android/sharing/SharingControllerImpl.java b/briar-android/src/main/java/org/briarproject/briar/android/sharing/SharingControllerImpl.java
index 55a4149a8..b58ab1a08 100644
--- a/briar-android/src/main/java/org/briarproject/briar/android/sharing/SharingControllerImpl.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/sharing/SharingControllerImpl.java
@@ -2,14 +2,12 @@ package org.briarproject.briar.android.sharing;
 
 import org.briarproject.bramble.api.connection.ConnectionRegistry;
 import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.db.DatabaseExecutor;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.event.EventListener;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.event.ContactConnectedEvent;
 import org.briarproject.bramble.api.plugin.event.ContactDisconnectedEvent;
-import org.briarproject.bramble.api.system.AndroidExecutor;
 
 import java.util.Collection;
 import java.util.HashSet;
@@ -26,7 +24,6 @@ public class SharingControllerImpl implements SharingController, EventListener {
 
 	private final EventBus eventBus;
 	private final ConnectionRegistry connectionRegistry;
-	private final AndroidExecutor executor;
 
 	// UI thread
 	private final Set<ContactId> contacts = new HashSet<>();
@@ -35,11 +32,9 @@ public class SharingControllerImpl implements SharingController, EventListener {
 
 	@Inject
 	SharingControllerImpl(EventBus eventBus,
-			ConnectionRegistry connectionRegistry,
-			AndroidExecutor executor) {
+			ConnectionRegistry connectionRegistry) {
 		this.eventBus = eventBus;
 		this.connectionRegistry = connectionRegistry;
-		this.executor = executor;
 		eventBus.addListener(this);
 	}
 
@@ -78,13 +73,11 @@ public class SharingControllerImpl implements SharingController, EventListener {
 		return online;
 	}
 
+	@UiThread
 	@Override
-	@DatabaseExecutor
 	public void addAll(Collection<ContactId> c) {
-		executor.runOnUiThread(() -> {
-			contacts.addAll(c);
-			updateLiveData();
-		});
+		contacts.addAll(c);
+		updateLiveData();
 	}
 
 	@UiThread