Fix: multiple asyncGetEvents

Author: kunall17

app/src/main/java/com/zulip/android/activities/ZulipActivity.java

@@ -1394,6 +1394,7 @@ private void startRequests() {
 
         if (event_poll != null) {
             event_poll.abort();
+            event_poll = null;
         }
 
         event_poll = new AsyncGetEvents(this);

app/src/main/java/com/zulip/android/networking/AsyncGetEvents.java

@@ -34,6 +34,7 @@ public class AsyncGetEvents extends Thread {
     private ZulipActivity activity;
     private ZulipApp app;
 
+    private boolean keepThisRunning = true;
     private HTTPRequest request;
 
     private AsyncGetEvents that = this;
@@ -56,6 +57,7 @@ public void abort() {
         // TODO: does this have race conditions? (if the thread is not in a
         // request when called)
         Log.i(ASYNC_GET_EVENTS, "Interrupting thread");
+        keepThisRunning = false;
         request.abort();
     }
 
@@ -98,7 +100,7 @@ private void register() throws JSONException, IOException {
 
     public void run() {
         try {
-            while (true) {
+            while (keepThisRunning) {
                 try {
                     request.clearProperties();
                     if (app.getEventQueueId() == null) {