Optimize the deletion of statistics data

core/src/main/java/de/danoeh/antennapod/core/storage/DBWriter.java

@@ -953,20 +953,7 @@ public class DBWriter {
         return dbExec.submit(() -> {
             PodDBAdapter adapter = PodDBAdapter.getInstance();
             adapter.open();
-
-            List<Feed> feeds = DBReader.getFeedList();
-            for (Feed feed : feeds) {
-                List<FeedItem> items = DBReader.getFeed(feed.getId()).getItems();
-                for (FeedItem item : items) {
-                    FeedMedia media = item.getMedia();
-                    if (media == null) {
-                        continue;
-                    }
-
-                    media.setPlayedDuration(0);
-                    adapter.setFeedMediaPlaybackInformation(media);
-                }
-            }
+            adapter.resetAllMediaPlayedDuration();
             adapter.close();
         });
     }

core/src/main/java/de/danoeh/antennapod/core/storage/PodDBAdapter.java

@@ -476,6 +476,20 @@ public class PodDBAdapter {
         }
     }
 
+    public void resetAllMediaPlayedDuration() {
+        try {
+            db.beginTransactionNonExclusive();
+            ContentValues values = new ContentValues();
+            values.put(KEY_PLAYED_DURATION, 0);
+            db.update(TABLE_NAME_FEED_MEDIA, values, null, new String[0]);
+            db.setTransactionSuccessful();
+        } catch (SQLException e) {
+            Log.e(TAG, Log.getStackTraceString(e));
+        } finally {
+            db.endTransaction();
+        }
+    }
+
     /**
      * Insert all FeedItems of a feed and the feed object itself in a single
      * transaction