From fc5418637332f7257c08574bff204fdb238999e2 Mon Sep 17 00:00:00 2001
From: ByteHamster <info@bytehamster.com>
Date: Mon, 26 Oct 2020 10:56:27 +0100
Subject: Fixed NPEs related to bottom sheet

---
 app/src/main/java/de/danoeh/antennapod/activity/MainActivity.java  | 3 +++
 .../java/de/danoeh/antennapod/fragment/AudioPlayerFragment.java    | 7 ++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/de/danoeh/antennapod/activity/MainActivity.java b/app/src/main/java/de/danoeh/antennapod/activity/MainActivity.java
index fffe5be60..8ada58b3a 100644
--- a/app/src/main/java/de/danoeh/antennapod/activity/MainActivity.java
+++ b/app/src/main/java/de/danoeh/antennapod/activity/MainActivity.java
@@ -166,6 +166,9 @@ public class MainActivity extends CastEnabledActivity {
         public void onSlide(@NonNull View view, float slideOffset) {
             AudioPlayerFragment audioPlayer = (AudioPlayerFragment) getSupportFragmentManager()
                     .findFragmentByTag(AudioPlayerFragment.TAG);
+            if (audioPlayer == null) {
+                return;
+            }
             float condensedSlideOffset = Math.max(0.0f, Math.min(0.2f, slideOffset - 0.2f)) / 0.2f;
             audioPlayer.getExternalPlayerHolder().setAlpha(1 - condensedSlideOffset);
             audioPlayer.getExternalPlayerHolder().setVisibility(
diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/AudioPlayerFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/AudioPlayerFragment.java
index e32fdb095..f456a8268 100644
--- a/app/src/main/java/de/danoeh/antennapod/fragment/AudioPlayerFragment.java
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/AudioPlayerFragment.java
@@ -135,7 +135,12 @@ public class AudioPlayerFragment extends Fragment implements
         pager.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
             @Override
             public void onPageSelected(int position) {
-                pager.post(() -> ((MainActivity) getActivity()).getBottomSheet().updateScrollingChild());
+                pager.post(() -> {
+                    if (getActivity() != null) {
+                        // By the time this is posted, the activity might be closed again.
+                        ((MainActivity) getActivity()).getBottomSheet().updateScrollingChild();
+                    }
+                });
             }
         });
         pageIndicator = root.findViewById(R.id.page_indicator);
-- 
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