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Improve "mark as read while scrolling" feature. #590

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This commit is contained in:
David Luhmer 2017-11-07 20:21:05 +01:00
parent a8adef498f
commit 570a5921d4
1 changed files with 75 additions and 2 deletions
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77
News-Android-App/src/main/java/de/luhmer/owncloudnewsreader/NewsReaderDetailFragment.java
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@ -154,6 +154,7 @@ public class NewsReaderDetailFragment extends Fragment {
super.onResume();
}
/*
private void handleMarkAsReadScrollEvent() {
LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
int firstVisibleItem = linearLayoutManager.findFirstVisibleItemPosition();
@ -179,13 +180,16 @@ public class NewsReaderDetailFragment extends Fragment {
RecyclerView.ViewHolder vhTemp = recyclerView.findViewHolderForLayoutPosition(i);
if(vhTemp instanceof ViewHolder) { //Check for ViewHolder instance because of ProgressViewHolder
vh = (ViewHolder) vhTemp;
if (vh != null && !vh.shouldStayUnread()) {
if (!vh.shouldStayUnread()) {
adapter.ChangeReadStateOfItem(vh, true);
} else {
Log.v(TAG, "shouldStayUnread");
}
}
}
}
}
*/
public void UpdateMenuItemsState()
{
@ -355,6 +359,7 @@ public class NewsReaderDetailFragment extends Fragment {
swipeRefresh.setColorSchemeColors(accentColor);
swipeRefresh.setOnRefreshListener((SwipeRefreshLayout.OnRefreshListener) getActivity());
/*
recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
GestureDetectorCompat detector = new GestureDetectorCompat(getActivity(), new RecyclerViewOnGestureListener());
@ -372,11 +377,79 @@ public class NewsReaderDetailFragment extends Fragment {
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
});
*/
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener()
{
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy)
{
if(dy > 0) //check for scroll down
{
if(mMarkAsReadWhileScrollingEnabled) {
//Log.v(TAG, "Scroll Delta y: " + dy);
handleMarkAsReadScrollEvent();
}
}
}
});
return rootView;
}
private int previousFirstVisibleItem = -1;
private void handleMarkAsReadScrollEvent() {
LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
NewsListRecyclerAdapter adapter = (NewsListRecyclerAdapter) recyclerView.getAdapter();
int firstVisibleItem = linearLayoutManager.findFirstVisibleItemPosition();
int lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition();
int visibleItemCount = lastVisibleItem - firstVisibleItem;
int totalItemCount = adapter.getItemCount();
boolean reachedBottom = (lastVisibleItem == (totalItemCount-1));
// Exit if the position didn't change.
if(firstVisibleItem == previousFirstVisibleItem && !reachedBottom)
return;
previousFirstVisibleItem = firstVisibleItem;
//Log.v(TAG, "First visible: " + firstVisibleItem + " - Last visible: " + lastVisibleItem + " - visible count: " + visibleItemCount + " - total count: " + totalItemCount);
//Set the item at top to read
//ViewHolder vh = (ViewHolder) recyclerView.findViewHolderForLayoutPosition(firstVisibleItem);
// Mark the first two items as read
final int numberItemsAhead = 2;
for(int i = firstVisibleItem; i < firstVisibleItem + numberItemsAhead; i++) {
//Log.v(TAG, "Mark item as read: " + i);
ViewHolder vh = (ViewHolder) recyclerView.findViewHolderForLayoutPosition(i);
if (vh != null && !vh.shouldStayUnread()) {
adapter.ChangeReadStateOfItem(vh, true);
}
}
//Check if Listview is scrolled to bottom
if (reachedBottom &&
visibleItemCount != 0 && //Check if list is empty
recyclerView.getChildAt(visibleItemCount).getBottom() <= recyclerView.getHeight()) {
for (int i = firstVisibleItem; i <= lastVisibleItem; i++) {
RecyclerView.ViewHolder vhTemp = recyclerView.findViewHolderForLayoutPosition(i);
if(vhTemp instanceof ViewHolder) { //Check for ViewHolder instance because of ProgressViewHolder
ViewHolder vh = (ViewHolder) vhTemp;
if (!vh.shouldStayUnread()) {
adapter.ChangeReadStateOfItem(vh, true);
} else {
Log.v(TAG, "shouldStayUnread");
}
}
}
}
}
/*
private class RecyclerViewOnGestureListener extends GestureDetector.SimpleOnGestureListener {
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
@ -385,7 +458,7 @@ public class NewsReaderDetailFragment extends Fragment {
}
return super.onScroll(e1, e2, distanceX, distanceY);
}
}
}*/
@Override