* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * distributed under the License is distributed on an "AS IS" BASIS, * Unless required by applicable law or agreed to in writing, software * You may obtain a copy of the License at * you may not use this file except in compliance with the License. The only difference between these scenarios is whether the selected item is partially or completely visible.* Licensed under the Apache License, Version 2.0 (the "License") This is what I want (the previous, selected, and next items snapped to the end). If I had instead selected Item5 (which is currently completely visible), it would result in the following: void, startSmoothScroll(RecyclerView.SmoothScroller smoothScroller). Im tring to make smooth scroller to need position in recyclerView. Smooth scroll to the specified adapter position. Notice that in the result, it scrolled the selected item (Item4) into view on the edge it was coming from (SnapToAny instead SnapToEnd) and only enough to display itself (instead of Item3, itself & Item5). androidandroid-recyclerviewlinearlayoutmanager. If I click Item4 (which is currently partially visible), it scrolls upward to result in the following:īut what I want & expect is the following: If, for example, my RecyclerView currently displays the following: This is why my CalculateDtToFit detects whether the selected item is the only, first, last, or other item so that I can adjust viewStart & viewEnd, as well as use SnapToEnd. When the user selects the EditText, I want to scroll so that the previous, selected & next item are visible & aligned to the end of the RecyclerView. LinearSmoothScroller.TargetPosition = position Įach item in my RecyclerView is a GridLayout which contains an EditText & Button. Public override void SmoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position)ĬustomSmoothScroller linearSmoothScroller = new CustomSmoothScroller(mainActivity) This.mainActivity = (MainActivity)context Public MyLinearLayoutManager(Context context) : base(context) RecyclerView.smoothScrollBy (Showing top 20 results out of 315) 7. Public class MyLinearLayoutManager : LinearLayoutManager RecyclerView.smoothScrollBy How to use smoothScrollBy method in 7.widget.RecyclerView Best Java code snippets using 7.widget. Return base.CalculateDtToFit(viewStart, viewEnd, boxStart, bo圎nd, -1) Public override int CalculateDtToFit(int viewStart, int viewEnd, int boxStart, int bo圎nd, int snapPreference) It leads to bad user experience as it seems that our Android App is laggy. When we implement RecyclerView in our Android Application, sometimes, we face problems like: The RecyclerView items are not scrolling smoothly. Public CustomSmoothScroller(Context context) : base(context) With these optimizations, we can make the RecyclerView scrolling smooth. public class CustomSmoothScroller : LinearSmoothScroller Here is the sample code, you could refer to it. Could you please share more details about the featur you want to achieve? If you want to scroll to a position and place each corresponding item at the top or end, change the value of the snapPreference property. This override is always called & returns the desired value, so why does it not always use the returned value? However, I have confirmed that the code above is being called & returning the desired values (for both completely & partially visible items), yet it only scrolls the returned value for completely visible items (partially visible items do scroll, but not by the amount returned here). What it looks like it is doing for the partially visible items is using base.CalculateDtToFit with the original values & SnapToAny rather than what I have in the code above. However, for items that are only partially visible (not completely offscreen, just not 100% within view), it does not. When I call SmoothScrollToPosition(x) to scroll to a RecyclerView item that is completely visible, everything works exactly as expected. If (((MainActivity)).rvPlayerNamesInput.GetAdapter().ItemCount = 1) To adjust how the scrollbar behaves for every increment of. I have a SmoothScroller that inherits from LinearSmoothScroller, and I override CalculateDtToFit as follows: public override int CalculateDtToFit(int viewStart, int viewEnd, int boxStart, int bo圎nd, int snapPreference) The LayoutManager is responsible for positioning items as well as recycling items in a RecyclerView.
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