From ee96226faf8d26c202881335b33b2514d63b2300 Mon Sep 17 00:00:00 2001
From: Dennis Guse <dennis.guse@alumni.tu-berlin.de>
Date: Mon, 31 May 2021 16:52:40 +0200
Subject: [PATCH]  Bugfix: avoid ConcurrentModificationException exception in
 ChartView.

---
 .../de/dennisguse/opentracks/fragments/ChartFragment.java     | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/de/dennisguse/opentracks/fragments/ChartFragment.java b/src/main/java/de/dennisguse/opentracks/fragments/ChartFragment.java
index 242d96421..775c0ee8c 100644
--- a/src/main/java/de/dennisguse/opentracks/fragments/ChartFragment.java
+++ b/src/main/java/de/dennisguse/opentracks/fragments/ChartFragment.java
@@ -27,6 +27,7 @@ import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import de.dennisguse.opentracks.R;
@@ -207,7 +208,8 @@ public class ChartFragment extends Fragment implements TrackDataListener {
     @Override
     public void onNewTrackPointsDone() {
         if (isResumed()) {
-            viewBinding.chartView.addChartPoints(pendingPoints);
+            //Avoid ConcurrentModificationException exception
+            viewBinding.chartView.addChartPoints(Collections.unmodifiableList(pendingPoints));
             pendingPoints.clear();
             runOnUiThread(updateChart);
         }