do not call listeners while being synchronized on stanza queue

src/main/java/eu/siacs/conversations/services/XmppConnectionService.java

@@ -245,15 +245,19 @@ public class XmppConnectionService extends Service {
 	private final OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
 
 		@Override
-		public void onMessageAcknowledged(Account account, String uuid) {
+		public boolean onMessageAcknowledged(Account account, String uuid) {
 			for (final Conversation conversation : getConversations()) {
 				if (conversation.getAccount() == account) {
 					Message message = conversation.findUnsentMessageWithUuid(uuid);
 					if (message != null) {
-						markMessage(message, Message.STATUS_SEND);
+						message.setStatus(Message.STATUS_SEND);
+						message.setErrorMessage(null);
+						databaseBackend.updateMessage(message, false);
+						return true;
 					}
 				}
 			}
+			return false;
 		}
 	};
 
@@ -1093,10 +1097,13 @@ public class XmppConnectionService extends Service {
 	public void scheduleWakeUpCall(int seconds, int requestCode) {
 		final long timeToWake = SystemClock.elapsedRealtime() + (seconds < 0 ? 1 : seconds + 1) * 1000;
 		final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
-		Intent intent = new Intent(this, EventReceiver.class);
+		if (alarmManager == null) {
+		    return;
+        }
+		final Intent intent = new Intent(this, EventReceiver.class);
 		intent.setAction("ping");
-		PendingIntent pendingIntent = PendingIntent.getBroadcast(this, requestCode, intent, 0);
 		try {
+		    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, requestCode, intent, 0);
 			alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake, pendingIntent);
 		} catch (RuntimeException e) {
 			Log.e(Config.LOGTAG, "unable to schedule alarm for ping", e);
@@ -1107,10 +1114,13 @@ public class XmppConnectionService extends Service {
 	private void scheduleNextIdlePing() {
 		final long timeToWake = SystemClock.elapsedRealtime() + (Config.IDLE_PING_INTERVAL * 1000);
 		final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
-		Intent intent = new Intent(this, EventReceiver.class);
+		if (alarmManager == null) {
+		    return;
+        }
+		final Intent intent = new Intent(this, EventReceiver.class);
 		intent.setAction(ACTION_IDLE_PING);
-		PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
 		try {
+            PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
 			alarmManager.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake, pendingIntent);
 		} catch (RuntimeException e) {
 			Log.d(Config.LOGTAG, "unable to schedule alarm for idle ping", e);
@@ -3474,7 +3484,9 @@ public class XmppConnectionService extends Service {
 		final XmppConnection connection = account.getXmppConnection();
 		if (connection != null) {
 			connection.sendIqPacket(packet, callback);
-		}
+		} else if (callback != null) {
+		    callback.onIqPacketReceived(account,new IqPacket(IqPacket.TYPE.TIMEOUT));
+        }
 	}
 
 	public void sendPresence(final Account account) {

src/main/java/eu/siacs/conversations/xmpp/OnMessageAcknowledged.java

@@ -3,5 +3,5 @@ package eu.siacs.conversations.xmpp;
 import eu.siacs.conversations.entities.Account;
 
 public interface OnMessageAcknowledged {
-	public void onMessageAcknowledged(Account account, String id);
+	boolean onMessageAcknowledged(Account account, String id);
 }

src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java

@@ -574,6 +574,7 @@ public class XmppConnection implements Runnable {
 				final String h = resumed.getAttribute("h");
 				try {
 					ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
+					final boolean acknowledgedMessages;
 					synchronized (this.mStanzaQueue) {
 						final int serverCount = Integer.parseInt(h);
 						if (serverCount < stanzasSent) {
@@ -583,12 +584,15 @@ public class XmppConnection implements Runnable {
 						} else {
 							Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed");
 						}
-						acknowledgeStanzaUpTo(serverCount);
+						acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
 						for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
 							failedStanzas.add(mStanzaQueue.valueAt(i));
 						}
 						mStanzaQueue.clear();
 					}
+					if (acknowledgedMessages) {
+						mXmppConnectionService.updateConversationUi();
+					}
 					Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
 					for (AbstractAcknowledgeableStanza packet : failedStanzas) {
 						if (packet instanceof MessagePacket) {
@@ -629,9 +633,13 @@ public class XmppConnection implements Runnable {
 				final Element ack = tagReader.readElement(nextTag);
 				lastPacketReceived = SystemClock.elapsedRealtime();
 				try {
+					final boolean acknowledgedMessages;
 					synchronized (this.mStanzaQueue) {
 						final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
-						acknowledgeStanzaUpTo(serverSequence);
+						acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
+					}
+					if (acknowledgedMessages) {
+						mXmppConnectionService.updateConversationUi();
 					}
 				} catch (NumberFormatException | NullPointerException e) {
 					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server send ack without sequence number");
@@ -641,8 +649,12 @@ public class XmppConnection implements Runnable {
 				try {
 					final int serverCount = Integer.parseInt(failed.getAttribute("h"));
 					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed but server acknowledged stanza #" + serverCount);
+					final boolean acknowledgedMessages;
 					synchronized (this.mStanzaQueue) {
-						acknowledgeStanzaUpTo(serverCount);
+						acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
+					}
+					if (acknowledgedMessages) {
+						mXmppConnectionService.updateConversationUi();
 					}
 				} catch (NumberFormatException | NullPointerException e) {
 					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
@@ -663,10 +675,11 @@ public class XmppConnection implements Runnable {
 		}
 	}
 
-	private void acknowledgeStanzaUpTo(int serverCount) {
+	private boolean acknowledgeStanzaUpTo(int serverCount) {
 		if (serverCount > stanzasSent) {
 			Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
 		}
+		boolean acknowledgedMessages = false;
 		for (int i = 0; i < mStanzaQueue.size(); ++i) {
 			if (serverCount >= mStanzaQueue.keyAt(i)) {
 				if (Config.EXTENDED_SM_LOGGING) {
@@ -675,12 +688,13 @@ public class XmppConnection implements Runnable {
 				AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
 				if (stanza instanceof MessagePacket && acknowledgedListener != null) {
 					MessagePacket packet = (MessagePacket) stanza;
-					acknowledgedListener.onMessageAcknowledged(account, packet.getId());
+					acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, packet.getId());
 				}
 				mStanzaQueue.removeAt(i);
 				i--;
 			}
 		}
+		return acknowledgedMessages;
 	}
 
 	private @NonNull