Made swipe listener screen density aware

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

@@ -556,6 +556,23 @@ public class FragmentMessages extends FragmentBase {
             boolean swipenav = prefs.getBoolean("swipenav", true);
             if (swipenav) {
                 Log.i("Swipe navigation");
+
+                final 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);
+                    }
+                });
+
                 rvMessage.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
                     @Override
                     public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent ev) {
@@ -1003,22 +1020,6 @@ public class FragmentMessages extends FragmentBase {
         }
     };
 
-    private 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/SwipeListener.java

@@ -10,10 +10,10 @@ import androidx.annotation.NonNull;
 public class SwipeListener implements View.OnTouchListener {
     private final GestureDetector gestureDetector;
 
-    public SwipeListener(Context context, final ISwipeListener listener) {
+    SwipeListener(final Context context, final ISwipeListener listener) {
         gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
-            private static final int MOVE_THRESHOLD = 100;
-            private static final int SPEED_THRESHOLD = 100;
+            private final int MOVE_THRESHOLD = Helper.dp2pixels(context, 100); // dp
+            private final int SPEED_THRESHOLD = Helper.dp2pixels(context, 100); // dp
 
             @Override
             public boolean onFling(MotionEvent me1, MotionEvent me2, float vx, float vy) {
@@ -21,9 +21,10 @@ public class SwipeListener implements View.OnTouchListener {
                     return false;
 
                 boolean consumed = false;
-                float dx = me2.getX() - me1.getX();
-                float dy = me2.getY() - me1.getY();
+                int dx = Math.round(me2.getX() - me1.getX());
+                int dy = Math.round(me2.getY() - me1.getY());
                 if (Math.abs(dx) > Math.abs(dy)) {
+                    Log.i("Swipe dx=" + dx + "/" + MOVE_THRESHOLD + " vx=" + vx + "/" + SPEED_THRESHOLD);
                     if (Math.abs(dx) > MOVE_THRESHOLD && Math.abs(vx) > SPEED_THRESHOLD)
                         try {
                             if (dx > 0)