Add recently connected state to core and UI.

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/ConnectionRegistry.java

@@ -5,8 +5,7 @@ import org.briarproject.bramble.api.contact.PendingContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.event.ConnectionClosedEvent;
 import org.briarproject.bramble.api.plugin.event.ConnectionOpenedEvent;
-import org.briarproject.bramble.api.plugin.event.ContactConnectedEvent;
-import org.briarproject.bramble.api.plugin.event.ContactDisconnectedEvent;
+import org.briarproject.bramble.api.plugin.event.ConnectionStatusChangedEvent;
 import org.briarproject.bramble.api.rendezvous.event.RendezvousConnectionClosedEvent;
 import org.briarproject.bramble.api.rendezvous.event.RendezvousConnectionOpenedEvent;
 
@@ -21,15 +20,15 @@ public interface ConnectionRegistry {
 	/**
 	 * Registers a connection with the given contact over the given transport.
 	 * Broadcasts {@link ConnectionOpenedEvent}. Also broadcasts
-	 * {@link ContactConnectedEvent} if this is the only connection with the
-	 * contact.
+	 * {@link ConnectionStatusChangedEvent} if this is the only connection with
+	 * the contact.
 	 */
 	void registerConnection(ContactId c, TransportId t, boolean incoming);
 
 	/**
 	 * Unregisters a connection with the given contact over the given transport.
 	 * Broadcasts {@link ConnectionClosedEvent}. Also broadcasts
-	 * {@link ContactDisconnectedEvent} if this is the only connection with
+	 * {@link ConnectionStatusChangedEvent} if this is the only connection with
 	 * the contact.
 	 */
 	void unregisterConnection(ContactId c, TransportId t, boolean incoming);
@@ -45,9 +44,9 @@ public interface ConnectionRegistry {
 	boolean isConnected(ContactId c, TransportId t);
 
 	/**
-	 * Returns true if the given contact is connected via any transport.
+	 * Returns the connection status of the given contact via all transports.
 	 */
-	boolean isConnected(ContactId c);
+	ConnectionStatus getConnectionStatus(ContactId c);
 
 	/**
 	 * Registers a connection with the given pending contact. Broadcasts

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/ConnectionStatus.java

+package org.briarproject.bramble.api.plugin;
+
+public enum ConnectionStatus {
+	CONNECTED, RECENTLY_CONNECTED, DISCONNECTED
+}

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/event/ContactConnectedEvent.java → bramble-api/src/main/java/org/briarproject/bramble/api/plugin/event/ConnectionStatusChangedEvent.java

@@ -3,24 +3,31 @@ package org.briarproject.bramble.api.plugin.event;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
 
 import javax.annotation.concurrent.Immutable;
 
 /**
- * An event that is broadcast when a contact connects that was not previously
- * connected via any transport.
+ * An event that is broadcast when a contact's connection status changes.
  */
 @Immutable
 @NotNullByDefault
-public class ContactConnectedEvent extends Event {
+public class ConnectionStatusChangedEvent extends Event {
 
 	private final ContactId contactId;
+	private final ConnectionStatus status;
 
-	public ContactConnectedEvent(ContactId contactId) {
+	public ConnectionStatusChangedEvent(ContactId contactId,
+			ConnectionStatus status) {
 		this.contactId = contactId;
+		this.status = status;
 	}
 
 	public ContactId getContactId() {
 		return contactId;
 	}
+
+	public ConnectionStatus getConnectionStatus() {
+		return status;
+	}
 }

bramble-api/src/main/java/org/briarproject/bramble/api/plugin/event/ContactDisconnectedEvent.java

-package org.briarproject.bramble.api.plugin.event;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.event.Event;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import javax.annotation.concurrent.Immutable;
-
-/**
- * An event that is broadcast when a contact disconnects and is no longer
- * connected via any transport.
- */
-@Immutable
-@NotNullByDefault
-public class ContactDisconnectedEvent extends Event {
-
-	private final ContactId contactId;
-
-	public ContactDisconnectedEvent(ContactId contactId) {
-		this.contactId = contactId;
-	}
-
-	public ContactId getContactId() {
-		return contactId;
-	}
-}

bramble-core/src/main/java/org/briarproject/bramble/plugin/ConnectionRegistryImpl.java

@@ -6,30 +6,41 @@ import org.briarproject.bramble.api.contact.PendingContactId;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.ConnectionRegistry;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.event.ConnectionClosedEvent;
 import org.briarproject.bramble.api.plugin.event.ConnectionOpenedEvent;
-import org.briarproject.bramble.api.plugin.event.ContactConnectedEvent;
-import org.briarproject.bramble.api.plugin.event.ContactDisconnectedEvent;
+import org.briarproject.bramble.api.plugin.event.ConnectionStatusChangedEvent;
 import org.briarproject.bramble.api.rendezvous.event.RendezvousConnectionClosedEvent;
 import org.briarproject.bramble.api.rendezvous.event.RendezvousConnectionOpenedEvent;
+import org.briarproject.bramble.api.system.Clock;
+import org.briarproject.bramble.api.system.Scheduler;
 
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
 import java.util.Set;
+import java.util.concurrent.ScheduledExecutorService;
 import java.util.logging.Logger;
 
 import javax.annotation.concurrent.GuardedBy;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
+import static java.util.Collections.emptyList;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import static java.util.concurrent.TimeUnit.MINUTES;
+import static java.util.concurrent.TimeUnit.SECONDS;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.CONNECTED;
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.DISCONNECTED;
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.RECENTLY_CONNECTED;
 
 @ThreadSafe
 @NotNullByDefault
@@ -38,22 +49,30 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 	private static final Logger LOG =
 			getLogger(ConnectionRegistryImpl.class.getName());
 
+	private static final long RECENTLY_CONNECTED_MS = MINUTES.toMillis(1);
+	private static final long EXPIRY_INTERVAL_MS = SECONDS.toMillis(10);
+
 	private final EventBus eventBus;
+	private final Clock clock;
 
 	private final Object lock = new Object();
 	@GuardedBy("lock")
 	private final Map<TransportId, Multiset<ContactId>> contactConnections;
 	@GuardedBy("lock")
-	private final Multiset<ContactId> contactCounts;
+	private final Map<ContactId, Counter> contactCounts;
 	@GuardedBy("lock")
 	private final Set<PendingContactId> connectedPendingContacts;
 
 	@Inject
-	ConnectionRegistryImpl(EventBus eventBus) {
+	ConnectionRegistryImpl(EventBus eventBus, Clock clock,
+			@Scheduler ScheduledExecutorService scheduler) {
 		this.eventBus = eventBus;
+		this.clock = clock;
 		contactConnections = new HashMap<>();
-		contactCounts = new Multiset<>();
+		contactCounts = new HashMap<>();
 		connectedPendingContacts = new HashSet<>();
+		scheduler.scheduleWithFixedDelay(this::expireRecentConnections,
+				EXPIRY_INTERVAL_MS, EXPIRY_INTERVAL_MS, MILLISECONDS);
 	}
 
 	@Override
@@ -71,12 +90,22 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 				contactConnections.put(t, m);
 			}
 			m.add(c);
-			if (contactCounts.add(c) == 1) firstConnection = true;
+
+			Counter counter = contactCounts.get(c);
+			if (counter == null) {
+				counter = new Counter();
+				contactCounts.put(c, counter);
+			}
+			if (counter.connections == 0) {
+				counter.disconnectedTime = 0;
+				firstConnection = true;
+			}
+			counter.connections++;
 		}
 		eventBus.broadcast(new ConnectionOpenedEvent(c, t, incoming));
 		if (firstConnection) {
 			LOG.info("Contact connected");
-			eventBus.broadcast(new ContactConnectedEvent(c));
+			eventBus.broadcast(new ConnectionStatusChangedEvent(c, CONNECTED));
 		}
 	}
 
@@ -93,12 +122,22 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 			if (m == null || !m.contains(c))
 				throw new IllegalArgumentException();
 			m.remove(c);
-			if (contactCounts.remove(c) == 0) lastConnection = true;
+
+			Counter counter = contactCounts.get(c);
+			if (counter == null || counter.connections == 0) {
+				throw new IllegalArgumentException();
+			}
+			counter.connections--;
+			if (counter.connections == 0) {
+				counter.disconnectedTime = clock.currentTimeMillis();
+				lastConnection = true;
+			}
 		}
 		eventBus.broadcast(new ConnectionClosedEvent(c, t, incoming));
 		if (lastConnection) {
 			LOG.info("Contact disconnected");
-			eventBus.broadcast(new ContactDisconnectedEvent(c));
+			eventBus.broadcast(
+					new ConnectionStatusChangedEvent(c, RECENTLY_CONNECTED));
 		}
 	}
 
@@ -106,7 +145,7 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 	public Collection<ContactId> getConnectedContacts(TransportId t) {
 		synchronized (lock) {
 			Multiset<ContactId> m = contactConnections.get(t);
-			if (m == null) return Collections.emptyList();
+			if (m == null) return emptyList();
 			List<ContactId> ids = new ArrayList<>(m.keySet());
 			if (LOG.isLoggable(INFO))
 				LOG.info(ids.size() + " contacts connected: " + t);
@@ -123,9 +162,11 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 	}
 
 	@Override
-	public boolean isConnected(ContactId c) {
+	public ConnectionStatus getConnectionStatus(ContactId c) {
 		synchronized (lock) {
-			return contactCounts.contains(c);
+			Counter counter = contactCounts.get(c);
+			if (counter == null) return DISCONNECTED;
+			return counter.connections > 0 ? CONNECTED : RECENTLY_CONNECTED;
 		}
 	}
 
@@ -147,4 +188,36 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 		}
 		eventBus.broadcast(new RendezvousConnectionClosedEvent(p, success));
 	}
+
+	@Scheduler
+	private void expireRecentConnections() {
+		long now = clock.currentTimeMillis();
+		List<ContactId> disconnected = new ArrayList<>();
+		synchronized (lock) {
+			Iterator<Entry<ContactId, Counter>> it =
+					contactCounts.entrySet().iterator();
+			while (it.hasNext()) {
+				Entry<ContactId, Counter> e = it.next();
+				if (e.getValue().isExpired(now)) {
+					disconnected.add(e.getKey());
+					it.remove();
+				}
+			}
+		}
+		for (ContactId c : disconnected) {
+			eventBus.broadcast(
+					new ConnectionStatusChangedEvent(c, DISCONNECTED));
+		}
+	}
+
+	private static class Counter {
+
+		private int connections = 0;
+		private long disconnectedTime = 0;
+
+		private boolean isExpired(long now) {
+			return connections == 0 &&
+					now - disconnectedTime > RECENTLY_CONNECTED_MS;
+		}
+	}
 }

bramble-core/src/test/java/org/briarproject/bramble/plugin/ConnectionRegistryImplTest.java

@@ -7,18 +7,20 @@ import org.briarproject.bramble.api.plugin.ConnectionRegistry;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.event.ConnectionClosedEvent;
 import org.briarproject.bramble.api.plugin.event.ConnectionOpenedEvent;
-import org.briarproject.bramble.api.plugin.event.ContactConnectedEvent;
-import org.briarproject.bramble.api.plugin.event.ContactDisconnectedEvent;
+import org.briarproject.bramble.api.plugin.event.ConnectionStatusChangedEvent;
 import org.briarproject.bramble.api.rendezvous.event.RendezvousConnectionClosedEvent;
 import org.briarproject.bramble.api.rendezvous.event.RendezvousConnectionOpenedEvent;
+import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.jmock.Expectations;
 import org.junit.Test;
 
 import java.util.Collection;
+import java.util.concurrent.ScheduledExecutorService;
 
 import static java.util.Collections.emptyList;
 import static java.util.Collections.singletonList;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static org.briarproject.bramble.test.TestUtils.getContactId;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 import static org.briarproject.bramble.test.TestUtils.getTransportId;
@@ -30,6 +32,9 @@ import static org.junit.Assert.fail;
 public class ConnectionRegistryImplTest extends BrambleMockTestCase {
 
 	private final EventBus eventBus = context.mock(EventBus.class);
+	private final Clock clock = context.mock(Clock.class);
+	private final ScheduledExecutorService scheduler =
+			context.mock(ScheduledExecutorService.class);
 
 	private final ContactId contactId = getContactId();
 	private final ContactId contactId1 = getContactId();
@@ -40,17 +45,25 @@ public class ConnectionRegistryImplTest extends BrambleMockTestCase {
 
 	@Test
 	public void testRegisterAndUnregister() {
-		ConnectionRegistry c = new ConnectionRegistryImpl(eventBus);
+		context.checking(new Expectations() {{
+			oneOf(scheduler).scheduleWithFixedDelay(with(any(Runnable.class)),
+					with(10_000L), with(10_000L), with(MILLISECONDS));
+		}});
+
+		ConnectionRegistry c = new ConnectionRegistryImpl(eventBus, clock,
+				scheduler);
+		context.assertIsSatisfied();
 
 		// The registry should be empty
 		assertEquals(emptyList(), c.getConnectedContacts(transportId));
 		assertEquals(emptyList(), c.getConnectedContacts(transportId1));
 
 		// Check that a registered connection shows up - this should
-		// broadcast a ConnectionOpenedEvent and a ContactConnectedEvent
+		// broadcast a ConnectionOpenedEvent and a ConnectionStatusChangedEvent
 		context.checking(new Expectations() {{
 			oneOf(eventBus).broadcast(with(any(ConnectionOpenedEvent.class)));
-			oneOf(eventBus).broadcast(with(any(ContactConnectedEvent.class)));
+			oneOf(eventBus).broadcast(with(any(
+					ConnectionStatusChangedEvent.class)));
 		}});
 		c.registerConnection(contactId, transportId, true);
 		assertEquals(singletonList(contactId),
@@ -81,11 +94,13 @@ public class ConnectionRegistryImplTest extends BrambleMockTestCase {
 		context.assertIsSatisfied();
 
 		// Unregister the other connection - this should broadcast a
-		// ConnectionClosedEvent and a ContactDisconnectedEvent
+		// ConnectionClosedEvent and a ConnectionStatusChangedEvent
 		context.checking(new Expectations() {{
+			oneOf(clock).currentTimeMillis();
+			will(returnValue(System.currentTimeMillis()));
 			oneOf(eventBus).broadcast(with(any(ConnectionClosedEvent.class)));
 			oneOf(eventBus).broadcast(with(any(
-					ContactDisconnectedEvent.class)));
+					ConnectionStatusChangedEvent.class)));
 		}});
 		c.unregisterConnection(contactId, transportId, true);
 		assertEquals(emptyList(), c.getConnectedContacts(transportId));
@@ -102,12 +117,12 @@ public class ConnectionRegistryImplTest extends BrambleMockTestCase {
 
 		// Register both contacts with one transport, one contact with both -
 		// this should broadcast three ConnectionOpenedEvents and two
-		// ContactConnectedEvents
+		// ConnectionStatusChangedEvents
 		context.checking(new Expectations() {{
 			exactly(3).of(eventBus).broadcast(with(any(
 					ConnectionOpenedEvent.class)));
 			exactly(2).of(eventBus).broadcast(with(any(
-					ContactConnectedEvent.class)));
+					ConnectionStatusChangedEvent.class)));
 		}});
 		c.registerConnection(contactId, transportId, true);
 		c.registerConnection(contactId1, transportId, true);
@@ -122,7 +137,14 @@ public class ConnectionRegistryImplTest extends BrambleMockTestCase {
 
 	@Test
 	public void testRegisterAndUnregisterPendingContacts() {
-		ConnectionRegistry c = new ConnectionRegistryImpl(eventBus);
+		context.checking(new Expectations() {{
+			oneOf(scheduler).scheduleWithFixedDelay(with(any(Runnable.class)),
+					with(10_000L), with(10_000L), with(MILLISECONDS));
+		}});
+
+		ConnectionRegistry c = new ConnectionRegistryImpl(eventBus, clock,
+				scheduler);
+		context.assertIsSatisfied();
 
 		context.checking(new Expectations() {{
 			oneOf(eventBus).broadcast(with(any(

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactItem.java

@@ -2,35 +2,38 @@ package org.briarproject.briar.android.contact;
 
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
 
 import javax.annotation.concurrent.NotThreadSafe;
 
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.DISCONNECTED;
+
 @NotThreadSafe
 @NotNullByDefault
 public class ContactItem {
 
 	private final Contact contact;
-	private boolean connected;
+	private ConnectionStatus status;
 
 	public ContactItem(Contact contact) {
-		this(contact, false);
+		this(contact, DISCONNECTED);
 	}
 
-	public ContactItem(Contact contact, boolean connected) {
+	public ContactItem(Contact contact, ConnectionStatus status) {
 		this.contact = contact;
-		this.connected = connected;
+		this.status = status;
 	}
 
 	public Contact getContact() {
 		return contact;
 	}
 
-	boolean isConnected() {
-		return connected;
+	ConnectionStatus getConnectionStatus() {
+		return status;
 	}
 
-	void setConnected(boolean connected) {
-		this.connected = connected;
+	void setConnectionStatus(ConnectionStatus status) {
+		this.status = status;
 	}
 
 }

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactItemViewHolder.java

@@ -7,6 +7,7 @@ import android.widget.TextView;
 
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.contact.BaseContactListAdapter.OnContactClickListener;
 
@@ -16,6 +17,8 @@ import androidx.annotation.UiThread;
 import androidx.recyclerview.widget.RecyclerView;
 import im.delight.android.identicons.IdenticonDrawable;
 
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.CONNECTED;
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.RECENTLY_CONNECTED;
 import static org.briarproject.briar.android.util.UiUtils.getContactDisplayName;
 
 @UiThread
@@ -27,7 +30,7 @@ public class ContactItemViewHolder<I extends ContactItem>
 	protected final ImageView avatar;
 	protected final TextView name;
 	@Nullable
-	protected final ImageView bulb;
+	private final ImageView bulb;
 
 	public ContactItemViewHolder(View v) {
 		super(v);
@@ -47,10 +50,13 @@ public class ContactItemViewHolder<I extends ContactItem>
 
 		if (bulb != null) {
 			// online/offline
-			if (item.isConnected()) {
-				bulb.setImageResource(R.drawable.contact_connected);
+			ConnectionStatus status = item.getConnectionStatus();
+			if (status == CONNECTED) {
+				bulb.setImageResource(R.drawable.ic_connected);
+			} else if (status == RECENTLY_CONNECTED) {
+				bulb.setImageResource(R.drawable.ic_recently_connected);
 			} else {
-				bulb.setImageResource(R.drawable.contact_disconnected);
+				bulb.setImageResource(R.drawable.ic_disconnected);
 			}
 		}
 

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactListAdapter.java

@@ -39,7 +39,7 @@ public class ContactListAdapter extends
 		if (c1.getTimestamp() != c2.getTimestamp()) {
 			return false;
 		}
-		return c1.isConnected() == c2.isConnected();
+		return c1.getConnectionStatus() == c2.getConnectionStatus();
 	}
 
 	@Override

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactListFragment.java

@@ -25,8 +25,8 @@ import org.briarproject.bramble.api.event.EventListener;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.plugin.ConnectionRegistry;
-import org.briarproject.bramble.api.plugin.event.ContactConnectedEvent;
-import org.briarproject.bramble.api.plugin.event.ContactDisconnectedEvent;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
+import org.briarproject.bramble.api.plugin.event.ConnectionStatusChangedEvent;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.contact.BaseContactListAdapter.OnContactClickListener;
@@ -53,7 +53,6 @@ import javax.inject.Inject;
 import androidx.annotation.UiThread;
 import androidx.core.app.ActivityCompat;
 import androidx.core.app.ActivityOptionsCompat;
-import androidx.core.util.Pair;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import io.github.kobakei.materialfabspeeddial.FabSpeedDial;
 import io.github.kobakei.materialfabspeeddial.FabSpeedDial.OnMenuItemClickListener;
@@ -137,26 +136,15 @@ public class ContactListFragment extends BaseFragment implements EventListener,
 					ContactId contactId = item.getContact().getId();
 					i.putExtra(CONTACT_ID, contactId.getInt());
 
+					Bundle options = null;
+					// work-around for android bug #224270
 					if (SDK_INT >= 23 && !isSamsung7()) {
-						ContactListItemViewHolder holder =
-								(ContactListItemViewHolder) list
-										.getRecyclerView()
-										.findViewHolderForAdapterPosition(
-												adapter.findItemPosition(item));
-						Pair<View, String> avatar =
-								Pair.create(holder.avatar,
-										getTransitionName(holder.avatar));
-						Pair<View, String> bulb =
-								Pair.create(holder.bulb,
-										getTransitionName(holder.bulb));
-						ActivityOptionsCompat options =
-								makeSceneTransitionAnimation(getActivity(),
-										avatar, bulb);
-						ActivityCompat.startActivity(getActivity(), i,
-								options.toBundle());
-					} else {
-						// work-around for android bug #224270
+						options = makeTransitionOptions(view);
+					}
+					if (options == null) {
 						startActivity(i);
+					} else {
+						ActivityCompat.startActivity(getActivity(), i, options);
 					}
 				};
 		adapter = new ContactListAdapter(requireContext(),
@@ -171,6 +159,15 @@ public class ContactListFragment extends BaseFragment implements EventListener,
 		return contentView;
 	}
 
+	@Nullable
+	private Bundle makeTransitionOptions(View view) {
+		View avatar = view.findViewById(R.id.avatarView);
+		String name = requireNonNull(getTransitionName(avatar));
+		ActivityOptionsCompat options = makeSceneTransitionAnimation(
+				requireActivity(), view, name);
+		return options.toBundle();
+	}
+
 	@Override
 	public void onMenuItemClick(FloatingActionButton fab, @Nullable TextView v,
 			int itemId) {
@@ -232,9 +229,9 @@ public class ContactListFragment extends BaseFragment implements EventListener,
 						ContactId id = c.getId();
 						GroupCount count =
 								conversationManager.getGroupCount(id);
-						boolean connected =
-								connectionRegistry.isConnected(c.getId());
-						contacts.add(new ContactListItem(c, connected, count));
+						ConnectionStatus status = connectionRegistry
+								.getConnectionStatus(c.getId());
+						contacts.add(new ContactListItem(c, status, count));
 					} catch (NoSuchContactException e) {
 						// Continue
 					}
@@ -265,10 +262,9 @@ public class ContactListFragment extends BaseFragment implements EventListener,
 		if (e instanceof ContactAddedEvent) {
 			LOG.info("Contact added, reloading");
 			loadContacts();
-		} else if (e instanceof ContactConnectedEvent) {
-			setConnected(((ContactConnectedEvent) e).getContactId(), true);
-		} else if (e instanceof ContactDisconnectedEvent) {
-			setConnected(((ContactDisconnectedEvent) e).getContactId(), false);
+		} else if (e instanceof ConnectionStatusChangedEvent) {
+			ConnectionStatusChangedEvent c = (ConnectionStatusChangedEvent) e;
+			setConnectionStatus(c.getContactId(), c.getConnectionStatus());
 		} else if (e instanceof ContactRemovedEvent) {
 			LOG.info("Contact removed, removing item");
 			removeItem(((ContactRemovedEvent) e).getContactId());
@@ -304,12 +300,12 @@ public class ContactListFragment extends BaseFragment implements EventListener,
 	}
 
 	@UiThread
-	private void setConnected(ContactId c, boolean connected) {
+	private void setConnectionStatus(ContactId c, ConnectionStatus status) {
 		adapter.incrementRevision();
 		int position = adapter.findItemPosition(c);
 		ContactListItem item = adapter.getItemAt(position);
 		if (item != null) {
-			item.setConnected(connected);
+			item.setConnectionStatus(status);
 			adapter.updateItemAt(position, item);
 		}
 	}

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactListItem.java

@@ -2,6 +2,7 @@ package org.briarproject.briar.android.contact;
 
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
 import org.briarproject.briar.api.client.MessageTracker.GroupCount;
 import org.briarproject.briar.api.conversation.ConversationMessageHeader;
 
@@ -15,9 +16,9 @@ public class ContactListItem extends ContactItem {
 	private long timestamp;
 	private int unread;
 
-	public ContactListItem(Contact contact, boolean connected,
+	public ContactListItem(Contact contact, ConnectionStatus status,
 			GroupCount count) {
-		super(contact, connected);
+		super(contact, status);
 		this.empty = count.getMsgCount() == 0;
 		this.unread = count.getUnreadCount();
 		this.timestamp = count.getLatestMsgTime();

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactListItemViewHolder.java

@@ -7,7 +7,6 @@ import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.contact.BaseContactListAdapter.OnContactClickListener;
-import org.briarproject.briar.android.util.UiUtils;
 
 import java.util.Locale;
 
@@ -15,8 +14,11 @@ import javax.annotation.Nullable;
 
 import androidx.annotation.UiThread;
 
+import static android.view.View.INVISIBLE;
+import static android.view.View.VISIBLE;
 import static androidx.core.view.ViewCompat.setTransitionName;
 import static org.briarproject.briar.android.util.UiUtils.formatDate;
+import static org.briarproject.briar.android.util.UiUtils.getAvatarTransitionName;
 
 @UiThread
 @NotNullByDefault
@@ -39,10 +41,11 @@ class ContactListItemViewHolder extends ContactItemViewHolder<ContactListItem> {
 		// unread count
 		int unreadCount = item.getUnreadCount();
 		if (unreadCount > 0) {
-			unread.setText(String.format(Locale.getDefault(), "%d", unreadCount));
-			unread.setVisibility(View.VISIBLE);
+			unread.setText(String.format(Locale.getDefault(), "%d",
+					unreadCount));
+			unread.setVisibility(VISIBLE);
 		} else {
-			unread.setVisibility(View.INVISIBLE);
+			unread.setVisibility(INVISIBLE);
 		}
 
 		// date of last message
@@ -54,8 +57,7 @@ class ContactListItemViewHolder extends ContactItemViewHolder<ContactListItem> {
 		}
 
 		ContactId c = item.getContact().getId();
-		setTransitionName(avatar, UiUtils.getAvatarTransitionName(c));
-		setTransitionName(bulb, UiUtils.getBulbTransitionName(c));
+		setTransitionName(avatar, getAvatarTransitionName(c));
 	}
 
 }

briar-android/src/main/java/org/briarproject/briar/android/controller/SharingControllerImpl.java

@@ -6,8 +6,7 @@ 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.ConnectionRegistry;
-import org.briarproject.bramble.api.plugin.event.ContactConnectedEvent;
-import org.briarproject.bramble.api.plugin.event.ContactDisconnectedEvent;
+import org.briarproject.bramble.api.plugin.event.ConnectionStatusChangedEvent;
 
 import java.util.Collection;
 import java.util.HashSet;
@@ -18,6 +17,8 @@ import javax.inject.Inject;
 
 import androidx.annotation.UiThread;
 
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.CONNECTED;
+
 @NotNullByDefault
 public class SharingControllerImpl implements SharingController, EventListener {
 
@@ -60,15 +61,14 @@ public class SharingControllerImpl implements SharingController, EventListener {
 
 	@Override
 	public void eventOccurred(Event e) {
-		if (e instanceof ContactConnectedEvent) {
-			setConnected(((ContactConnectedEvent) e).getContactId());
-		} else if (e instanceof ContactDisconnectedEvent) {
-			setConnected(((ContactDisconnectedEvent) e).getContactId());
+		if (e instanceof ConnectionStatusChangedEvent) {
+			ConnectionStatusChangedEvent c = (ConnectionStatusChangedEvent) e;
+			setConnectionStatus(c.getContactId());
 		}
 	}
 
 	@UiThread
-	private void setConnected(ContactId c) {
+	private void setConnectionStatus(ContactId c) {
 		if (listener == null) throw new IllegalStateException();
 		if (contacts.contains(c)) {
 			int online = getOnlineCount();
@@ -95,7 +95,9 @@ public class SharingControllerImpl implements SharingController, EventListener {
 	public int getOnlineCount() {
 		int online = 0;
 		for (ContactId c : contacts) {
-			if (connectionRegistry.isConnected(c)) online++;
+			if (connectionRegistry.getConnectionStatus(c) == CONNECTED) {
+				online++;
+			}
 		}
 		return online;
 	}

briar-android/src/main/java/org/briarproject/briar/android/conversation/ConversationActivity.java

@@ -13,7 +13,6 @@ import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
-import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -34,8 +33,8 @@ import org.briarproject.bramble.api.event.EventListener;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.plugin.ConnectionRegistry;
-import org.briarproject.bramble.api.plugin.event.ContactConnectedEvent;
-import org.briarproject.bramble.api.plugin.event.ContactDisconnectedEvent;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
+import org.briarproject.bramble.api.plugin.event.ConnectionStatusChangedEvent;
 import org.briarproject.bramble.api.sync.ClientId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.event.MessagesAckedEvent;
@@ -125,6 +124,8 @@ import static java.util.Objects.requireNonNull;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.CONNECTED;
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.RECENTLY_CONNECTED;
 import static org.briarproject.bramble.util.LogUtils.logDuration;
 import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.LogUtils.now;
@@ -138,7 +139,6 @@ import static org.briarproject.briar.android.conversation.ImageActivity.ATTACHME
 import static org.briarproject.briar.android.conversation.ImageActivity.DATE;
 import static org.briarproject.briar.android.conversation.ImageActivity.NAME;
 import static org.briarproject.briar.android.util.UiUtils.getAvatarTransitionName;
-import static org.briarproject.briar.android.util.UiUtils.getBulbTransitionName;
 import static org.briarproject.briar.android.util.UiUtils.observeOnce;
 import static org.briarproject.briar.api.messaging.MessagingConstants.MAX_ATTACHMENTS_PER_MESSAGE;
 import static org.briarproject.briar.api.messaging.MessagingConstants.MAX_PRIVATE_MESSAGE_TEXT_LENGTH;
@@ -198,8 +198,8 @@ public class ConversationActivity extends BriarActivity
 	private ConversationAdapter adapter;
 	private Toolbar toolbar;
 	private CircleImageView toolbarAvatar;
-	private ImageView toolbarStatus;
 	private TextView toolbarTitle;
+	private TextView toolbarStatus;
 	private BriarRecyclerView list;
 	private LinearLayoutManager layoutManager;
 	private TextInputView textInputView;
@@ -237,8 +237,8 @@ public class ConversationActivity extends BriarActivity
 		// Custom Toolbar
 		toolbar = requireNonNull(setUpCustomToolbar(true));
 		toolbarAvatar = toolbar.findViewById(R.id.contactAvatar);
-		toolbarStatus = toolbar.findViewById(R.id.contactStatus);
 		toolbarTitle = toolbar.findViewById(R.id.contactName);
+		toolbarStatus = toolbar.findViewById(R.id.contactStatus);
 
 		observeOnce(viewModel.getContactAuthorId(), this, authorId -> {
 			requireNonNull(authorId);
@@ -257,7 +257,6 @@ public class ConversationActivity extends BriarActivity
 				this::onAddedPrivateMessage);
 
 		setTransitionName(toolbarAvatar, getAvatarTransitionName(contactId));
-		setTransitionName(toolbarStatus, getBulbTransitionName(contactId));
 
 		visitor = new ConversationVisitor(this, this, this,
 				viewModel.getContactDisplayName());
@@ -499,14 +498,14 @@ public class ConversationActivity extends BriarActivity
 
 	@UiThread
 	private void displayContactOnlineStatus() {
-		if (connectionRegistry.isConnected(contactId)) {
-			toolbarStatus.setImageDrawable(ContextCompat.getDrawable(
-					ConversationActivity.this, R.drawable.contact_online));
-			toolbarStatus.setContentDescription(getString(R.string.online));
+		ConnectionStatus status =
+				connectionRegistry.getConnectionStatus(contactId);
+		if (status == CONNECTED) {
+			toolbarStatus.setText(R.string.online);
+		} else if (status == RECENTLY_CONNECTED) {
+			toolbarStatus.setText(R.string.recently_online);
 		} else {
-			toolbarStatus.setImageDrawable(ContextCompat.getDrawable(
-					ConversationActivity.this, R.drawable.contact_offline));
-			toolbarStatus.setContentDescription(getString(R.string.offline));
+			toolbarStatus.setText(R.string.offline);
 		}
 	}
 
@@ -729,16 +728,10 @@ public class ConversationActivity extends BriarActivity
 				LOG.info("Messages acked");
 				markMessages(m.getMessageIds(), true, true);
 			}
-		} else if (e instanceof ContactConnectedEvent) {
-			ContactConnectedEvent c = (ContactConnectedEvent) e;
-			if (c.getContactId().equals(contactId)) {
-				LOG.info("Contact connected");
-				displayContactOnlineStatus();
-			}
-		} else if (e instanceof ContactDisconnectedEvent) {
-			ContactDisconnectedEvent c = (ContactDisconnectedEvent) e;
+		} else if (e instanceof ConnectionStatusChangedEvent) {
+			ConnectionStatusChangedEvent c = (ConnectionStatusChangedEvent) e;
 			if (c.getContactId().equals(contactId)) {
-				LOG.info("Contact disconnected");
+				LOG.info("Connection status changed");
 				displayContactOnlineStatus();
 			}
 		} else if (e instanceof ClientVersionUpdatedEvent) {

briar-android/src/main/java/org/briarproject/briar/android/introduction/ContactChooserFragment.java

@@ -12,6 +12,7 @@ import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.plugin.ConnectionRegistry;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.contact.BaseContactListAdapter.OnContactClickListener;
@@ -73,7 +74,8 @@ public class ContactChooserFragment extends BaseFragment {
 	}
 
 	@Override
-	public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
 			@Nullable Bundle savedInstanceState) {
 
 		View contentView = inflater.inflate(R.layout.list, container, false);
@@ -127,9 +129,9 @@ public class ContactChooserFragment extends BaseFragment {
 						ContactId id = c.getId();
 						GroupCount count =
 								conversationManager.getGroupCount(id);
-						boolean connected =
-								connectionRegistry.isConnected(c.getId());
-						contacts.add(new ContactListItem(c, connected, count));
+						ConnectionStatus status = connectionRegistry
+								.getConnectionStatus(c.getId());
+						contacts.add(new ContactListItem(c, status, count));
 					}
 				}
 				displayContacts(contacts);

briar-android/src/main/java/org/briarproject/briar/android/privategroup/memberlist/GroupMemberListActivity.java

@@ -99,7 +99,7 @@ public class GroupMemberListActivity extends BriarActivity
 				supportFinishAfterTransition();
 			}
 		}
-		// TODO ContactConnectedEvent and ContactDisconnectedEvent
+		// TODO ConnectionStatusChangedEvent
 	}
 
 	@Override

briar-android/src/main/java/org/briarproject/briar/android/privategroup/memberlist/GroupMemberListControllerImpl.java

@@ -5,6 +5,7 @@ import org.briarproject.bramble.api.db.DatabaseExecutor;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.plugin.ConnectionRegistry;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.briar.android.controller.DbControllerImpl;
 import org.briarproject.briar.android.controller.handler.ResultExceptionHandler;
@@ -19,6 +20,7 @@ import java.util.logging.Logger;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.DISCONNECTED;
 import static org.briarproject.bramble.util.LogUtils.logException;
 
 class GroupMemberListControllerImpl extends DbControllerImpl
@@ -50,10 +52,11 @@ class GroupMemberListControllerImpl extends DbControllerImpl
 						privateGroupManager.getMembers(groupId);
 				for (GroupMember m : members) {
 					ContactId c = m.getContactId();
-					boolean online = false;
-					if (c != null)
-						online = connectionRegistry.isConnected(c);
-					items.add(new MemberListItem(m, online));
+					ConnectionStatus status = DISCONNECTED;
+					if (c != null) {
+						status = connectionRegistry.getConnectionStatus(c);
+					}
+					items.add(new MemberListItem(m, status));
 				}
 				handler.onResult(items);
 			} catch (DbException e) {

briar-android/src/main/java/org/briarproject/briar/android/privategroup/memberlist/MemberListAdapter.java

@@ -45,7 +45,7 @@ class MemberListAdapter extends
 
 	@Override
 	public boolean areContentsTheSame(MemberListItem m1, MemberListItem m2) {
-		if (m1.isOnline() != m2.isOnline()) return false;
+		if (m1.getConnectionStatus() != m2.getConnectionStatus()) return false;
 		if (m1.getContactId() != m2.getContactId()) return false;
 		if (m1.getStatus() != m2.getStatus()) return false;
 		return true;

briar-android/src/main/java/org/briarproject/briar/android/privategroup/memberlist/MemberListItem.java

@@ -5,6 +5,7 @@ import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorInfo;
 import org.briarproject.bramble.api.identity.AuthorInfo.Status;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
 import org.briarproject.briar.api.privategroup.GroupMember;
 
 import javax.annotation.Nullable;
@@ -15,11 +16,11 @@ import javax.annotation.concurrent.NotThreadSafe;
 class MemberListItem {
 
 	private final GroupMember groupMember;
-	private boolean online;
+	private ConnectionStatus status;
 
-	MemberListItem(GroupMember groupMember, boolean online) {
+	MemberListItem(GroupMember groupMember, ConnectionStatus status) {
 		this.groupMember = groupMember;
-		this.online = online;
+		this.status = status;
 	}
 
 	Author getMember() {
@@ -43,12 +44,12 @@ class MemberListItem {
 		return groupMember.getContactId();
 	}
 
-	boolean isOnline() {
-		return online;
+	ConnectionStatus getConnectionStatus() {
+		return status;
 	}
 
-	void setOnline(boolean online) {
-		this.online = online;
+	void setConnectionStatus(ConnectionStatus status) {
+		this.status = status;
 	}
 
 }

briar-android/src/main/java/org/briarproject/briar/android/privategroup/memberlist/MemberListItemHolder.java

@@ -5,6 +5,7 @@ import android.widget.ImageView;
 import android.widget.TextView;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.ConnectionStatus;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.view.AuthorView;
 
@@ -14,6 +15,8 @@ import androidx.recyclerview.widget.RecyclerView;
 import static android.view.View.GONE;
 import static android.view.View.VISIBLE;
 import static org.briarproject.bramble.api.identity.AuthorInfo.Status.OURSELVES;
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.CONNECTED;
+import static org.briarproject.bramble.api.plugin.ConnectionStatus.RECENTLY_CONNECTED;
 import static org.briarproject.briar.android.util.UiUtils.getContactDisplayName;
 
 @UiThread
@@ -38,10 +41,13 @@ class MemberListItemHolder extends RecyclerView.ViewHolder {
 		// online status of visible contacts
 		if (item.getContactId() != null) {
 			bulb.setVisibility(VISIBLE);
-			if (item.isOnline()) {
-				bulb.setImageResource(R.drawable.contact_connected);
+			ConnectionStatus status = item.getConnectionStatus();
+			if (status == CONNECTED) {
+				bulb.setImageResource(R.drawable.ic_connected);
+			} else if (status == RECENTLY_CONNECTED) {
+				bulb.setImageResource(R.drawable.ic_recently_connected);
 			} else {
-				bulb.setImageResource(R.drawable.contact_disconnected);
+				bulb.setImageResource(R.drawable.ic_disconnected);
 			}
 		} else {
 			bulb.setVisibility(GONE);