FastScroller for Android's
RecyclerViews using either
GridLayoutManager (including multiple spans).
The style is loosely based on the
FastScroller from whatever the last version of Lollipop was. This library borrows heavily from Google's Launcher3 FastScroller
You must use
FastScrollRecyclerView as your base
RecyclerView. See the sample project if you're having trouble.
<com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView android:id="@+id/recycler" android:layout_width="match_parent" android:layout_height="match_parent" app:fastScrollPopupBgColor="@color/colorAccent" app:fastScrollPopupTextColor="@android:color/primary_text_dark" app:fastScrollThumbColor="@color/colorAccent" />
To display the
FastScrollPopup, your adapter must implement
FastScrollRecyclerView.SectionedAdapter and override
If you need to know when fast-scrolling starts or stops, you can attach an OnFastScrollStateChangedListener to the FastScrollRecyclerView.
Varying Row Heights
FastScrollRecyclerView assumes that all items in the adapter have the same height. If your adapter has
item views with different heights, then you should make your adapter implement the
MeasurableAdapter interface and
getViewTypeHeight() – otherwise the scroll thumb may not appear in the correct position and scrolling may
getViewTypeHeight() returns the height of a single view of a given type in pixels. The height of each view must be
fixed and constant between all instances of a view type. Because the implementor is responsible for computing this
value before views are laid out, this is not suitable for view types where the height of a view is determined by a
variable number of lines of text that the item consumes.
MeasurableAdapter only works with
MeasurableAdapter with a
GridLayoutManager that has more than one span will cause the scrollbar thumb to reach the bottom of the list before
the halfway point on the scrollbar's background.
You can enable/disable autohide using the
fastScrollAutoHideDelay attributes in xml:
<com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView app:fastScrollAutoHide="true" app:fastScrollAutoHideDelay="1500" ...
Or programmatically via
setAutoHideDelay(int hideDelay) and
The popup background, popup text, popupbackground size, popup text size, track background, thumb color and popup position can all be styled via xml:
<com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView app:fastScrollPopupBgColor="@color/colorAccent" app:fastScrollPopupTextColor="@android:color/primary_text_dark" app:fastScrollPopupTextSize="56sp" app:fastScrollPopupBackgroundSize="88dp" app:fastScrollThumbColor="@color/colorAccent" app:fastScrollTrackColor="#1f000000" app:fastScrollPopupPosition="adjacent"/> ...
Or programmatically via
setThumbColor(@ColorInt int color),
setTrackColor(@ColorInt int color),
setPopupBgColor(@ColorInt int color),
setPopupTextColor(@ColorInt int color),
setPopupTextSize(int size) &
setPopupPosition(@FastScroller.FastScrollerPopupPosition int position)
- Added support for varying row heights via
- Fixed an issue preventing the view from rendering in the Android Studio 'design' panel.
- Updated dependencies
- Make it possible to set popup position programmatically
- Added option to position the FastScroll-Popup in the center of the RecyclerView (rather than tracking adjacent to the FastScroll thumb)
- Fixed a Proguard Obfuscation issue preventing animations from running
- Fixed an issue where popup background color ignored alpha channel
- Added support for item decorations
- Added FastScrollStateChanged listener. Notifies when scrolling starts & stops.
- Added methods/attributes to set popup background & text size
- Added method to set popup typeface
- Fixed issue where item decorations were drawn over the top of the popup (#18)
- Updated dependencies
- Updated gradle & dependencies
- Fixed crash when no adapter was set on the
- Fixed crash when
RecyclerViewchildren are null (
itemCountis non zero, but
FastScrollPopupno longer requires your adapter to implement
SectionIndexer, but rather
FastScrollRecyclerView.SectionedAdapter, which is much easier to use.
Copyright (C) 2016 Tim Malseed Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Copyright (C) 2010 The Android Open Source Project Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.