Refactoring

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -558,7 +558,7 @@ public class FragmentMessages extends FragmentBase {
                 rvMessage.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
                     @Override
                     public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent ev) {
-                        swipeListener.onTouch(null, ev);
+                        swipeListener.onTouch(rv, ev);
                         return false;
                     }
 

app/src/main/java/eu/faircode/email/SwipeListener.java

@@ -5,6 +5,8 @@ import android.view.GestureDetector;
 import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.annotation.NonNull;
+
 public class SwipeListener implements View.OnTouchListener {
     private final GestureDetector gestureDetector;
 
@@ -37,7 +39,7 @@ public class SwipeListener implements View.OnTouchListener {
         });
     }
 
-    public boolean onTouch(final View v, final MotionEvent event) {
+    public boolean onTouch(@NonNull View view, @NonNull MotionEvent event) {
         return gestureDetector.onTouchEvent(event);
     }