Show messages even when offline.

Fixes #82

Author: nitish1211

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

@@ -2021,7 +2021,6 @@ protected void onResume() {
         if (narrowedList != null) {
             narrowedList.onActivityResume();
         }
-        startRequests();
     }
 
     @Override
@@ -2163,7 +2162,7 @@ public enum Flag {
     }
     public void setupNetworkBroadcastReceiver()
     {
-         networkStateReceiver = new BroadcastReceiver() {
+        networkStateReceiver = new BroadcastReceiver() {
             final CoordinatorLayout coordinatorLayout = (CoordinatorLayout) findViewById(R.id.coordinatorLayout);
             @Override
             public void onReceive(Context context, Intent intent) {
@@ -2172,9 +2171,13 @@ public void onReceive(Context context, Intent intent) {
                     //Remove chatBox when network connectivity is lost
                     displayChatBox(false);
                     Snackbar.make(coordinatorLayout,R.string.no_connection,Snackbar.LENGTH_INDEFINITE).show();
+                    //Displays old offline messages
+                    onReadyToDisplay(true);
                     Log.d("Network Listener", "No Internet");
                 }
                 else{
+                    //Starts a network request only when there is an active network connection
+                    startRequests();
                     Snackbar.make(coordinatorLayout,R.string.connection_established,Snackbar.LENGTH_SHORT).show();
                     Log.d("Network Listener", "Internet");
                 }