Refactored swipe listener

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

@@ -26,7 +26,6 @@ import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
-import android.view.MotionEvent;
 import android.view.View;
 
 import java.util.ArrayList;
@@ -40,7 +39,6 @@ import androidx.fragment.app.Fragment;
 
 abstract class ActivityBase extends AppCompatActivity implements SharedPreferences.OnSharedPreferenceChangeListener {
     private boolean contacts;
-    private SwipeListener swipeListener;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -67,17 +65,6 @@ abstract class ActivityBase extends AppCompatActivity implements SharedPreferenc
         super.onCreate(savedInstanceState);
     }
 
-    void setSwipeListener(SwipeListener.ISwipeListener listener) {
-        swipeListener = new SwipeListener(this, listener);
-    }
-
-    @Override
-    public boolean dispatchTouchEvent(MotionEvent ev) {
-        if (swipeListener != null)
-            swipeListener.onTouch(null, ev);
-        return super.dispatchTouchEvent(ev);
-    }
-
     @Override
     protected void onResume() {
         Log.i("Resume " + this.getClass().getName());

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

@@ -44,6 +44,7 @@ import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
+import android.view.MotionEvent;
 import android.view.SubMenu;
 import android.view.View;
 import android.view.ViewGroup;
@@ -298,8 +299,6 @@ public class FragmentMessages extends FragmentBase {
 
         rvMessage.setAdapter(adapter);
 
-        new ItemTouchHelper(touchHelper).attachToRecyclerView(rvMessage);
-
         bottom_navigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
             @Override
             public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
@@ -401,32 +400,29 @@ public class FragmentMessages extends FragmentBase {
                 }
             });
 
-            ActivityBase activity = (ActivityBase) getActivity();
-            activity.setSwipeListener(new SwipeListener.ISwipeListener() {
-                @Override
-                public boolean onSwipeRight() {
-                    boolean swipenav = prefs.getBoolean("swipenav", true);
-                    if (!swipenav)
-                        return false;
-
-                    if (previous != null)
-                        navigate(previous, true);
-                    return (previous != null);
-                }
-
-                @Override
-                public boolean onSwipeLeft() {
-                    boolean swipenav = prefs.getBoolean("swipenav", true);
-                    if (!swipenav)
+            boolean swipenav = prefs.getBoolean("swipenav", true);
+            if (swipenav) {
+                Log.i("Swipe navigation");
+                rvMessage.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
+                    @Override
+                    public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent ev) {
+                        swipeListener.onTouch(null, ev);
                         return false;
+                    }
 
-                    if (next != null)
-                        navigate(next, false);
-                    return (next != null);
-                }
-            });
+                    @Override
+                    public void onTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent ev) {
+                    }
 
+                    @Override
+                    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
+                    }
+                });
+            } else
+                new ItemTouchHelper(touchHelper).attachToRecyclerView(rvMessage);
         } else {
+            new ItemTouchHelper(touchHelper).attachToRecyclerView(rvMessage);
+
             selectionPredicate = new SelectionPredicateMessage(rvMessage);
 
             selectionTracker = new SelectionTracker.Builder<>(
@@ -819,6 +815,22 @@ public class FragmentMessages extends FragmentBase {
         }
     };
 
+    SwipeListener swipeListener = new SwipeListener(getContext(), new SwipeListener.ISwipeListener() {
+        @Override
+        public boolean onSwipeRight() {
+            if (previous != null)
+                navigate(previous, true);
+            return (previous != null);
+        }
+
+        @Override
+        public boolean onSwipeLeft() {
+            if (next != null)
+                navigate(next, false);
+            return (next != null);
+        }
+    });
+
     private void onActionMove(String folderType) {
         Bundle args = new Bundle();
         args.putLong("account", account);

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

@@ -94,7 +94,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
 
     static String[] OPTIONS_RESTART = new String[]{
             "unified", "date", "threading", "avatars", "identicons", "preview", "addresses", "autoimages", "actionbar",
-            "pull", "autoexpand", "autoclose", "autonext",
+            "pull", "swipenav", "autoexpand", "autoclose", "autonext",
             "debug"
     };