Better handling of loading progress and image load.

app/src/main/java/eu/kanade/mangafeed/ui/viewer/VerticalViewer.java

@@ -58,11 +58,6 @@ public class VerticalViewer extends BaseViewer {
         updatePageNumber();
     }
 
-    @Override
-    public void onNextPage(Page page) {
-        adapter.replacePage(getPosFromPage(page), page);
-    }
-
     @Override
     public boolean onImageTouch(MotionEvent motionEvent) {
         return false;

app/src/main/java/eu/kanade/mangafeed/ui/viewer/WebtoonViewer.java

@@ -33,11 +33,6 @@ public class WebtoonViewer extends BaseViewer {
         return adapter.getItemCount();
     }
 
-    @Override
-    public void onNextPage(Page page) {
-        adapter.setPage(getPosFromPage(page), page);
-    }
-
     @Override
     public void onPageListReady(List<Page> pages) {
         adapter.setPages(pages);

app/src/main/java/eu/kanade/mangafeed/ui/viewer/base/BaseViewer.java

@@ -33,6 +33,5 @@ public abstract class BaseViewer {
 
     public abstract int getTotalPages();
     public abstract void onPageListReady(List<Page> pages);
-    public abstract void onNextPage(Page page);
     public abstract boolean onImageTouch(MotionEvent motionEvent);
 }

app/src/main/java/eu/kanade/mangafeed/ui/viewer/base/ViewPagerViewer.java

@@ -71,11 +71,6 @@ public abstract class ViewPagerViewer extends BaseViewer {
         updatePageNumber();
     }
 
-    @Override
-    public void onNextPage(Page page) {
-        adapter.replacePage(getPosFromPage(page), page);
-    }
-
     @Override
     public boolean onImageTouch(MotionEvent motionEvent) {
         return viewPager.onImageTouch(motionEvent);