FastScroll-Everywhere

Add the fast-scroll feature to any scrollable view: RecyclerView, ScrollView, WebView, ListView, GridView, etc.

为任意可滑动的View添加快速滑动，是的，任意。

Sample

FastScroll-EverywhereSample.apk

GIF

Usage

• Use FastScrollRecyclerView FastScrollScrollView FastScrollWebView FastScrollListView FastScrollGridView to replace the original one.

• PopupIndicator

      FastScrollDelegate delegate = yourFastScrollRecyclerView.getDelegate();
      //To show PopupIndicator, you need to initIndicatorPopup first. There is no PopupIndicator by default, to avoid wasting memory.
      delegate.initIndicatorPopup(new IndicatorPopup.Builder(delegate));//create a default IndicatorPopup
      //Change the text in IndicatorPopup
      delegate.setIndicatorText("A"); //You had better to set only one char or use small textSize.

• OnFastScrollListener

      FastScrollDelegate delegate = yourFastScrollRecyclerView.getDelegate();
      delegate.setOnFastScrollListener(new OnFastScrollListener() {
          @Override
          public void onFastScrolled(View view, FastScrollDelegate delegate, int touchDeltaY, int viewScrollDeltaY,
                  float scrollPercent) {
              String indicator = "A";
              delegate.setIndicatorText(indicator);
          }
  
          @Override
          public void onFastScrollStart(View view, FastScrollDelegate delegate) {
          }
  
          @Override
          public void onFastScrollEnd(View view, FastScrollDelegate delegate) {
          }
      });

Customisation

• Thumb

      Drawable yourThumbDrawable = ...;
      FastScrollRecyclerView yourFastScrollRecyclerView =...; 
      boolean isDynamicHeight = true | false;
  
      //Change the constructed function of FastScrollRecyclerView(see the source code)
      mDelegate = new FastScrollDelegate.Builder(yourFastScrollRecyclerView)
          .width(20)//the width of thumb, in dp
          .height(32)//the height of thumb, in dp
          .thumbNormalColor(0x80808080)//normal color of default thumbDrawable
          .thumbPressedColor(0xff03a9f4)//pressed color of default thumbDrawable
          .thumbDrawable(yourThumbDrawable)//the thumbDrawable(with state_pressed)
          .dynamicHeight(isDynamicHeight)//if true, the thumbHeight is computed by visible-percent of view and min-height is thumbHeight you set.
          .build(yourFastScrollRecyclerView);
  
      //Or change the thumb style runtime
      yourFastScrollRecyclerView.getDelegate().setThumbDrawable(yourThumbDrawable);//set the thumbDrawable(with state_pressed)
      yourFastScrollRecyclerView.getDelegate().setThumbSize(20, 32);//set the thumb size, in dp
      yourFastScrollRecyclerView.getDelegate().setThumbDynamicHeight(isDynamicHeight);

• PopupIndicator

      FastScrollDelegate delegate = yourFastScrollRecyclerView.getDelegate();
      delegate.initIndicatorPopup(new IndicatorPopup.Builder(delegate)
          .indicatorPopupColor(0xff03a9f4)//popup bubble color
          .indicatorPopupSize(72)//popup bubble size
          .indicatorTextSize(36)//text size, in dp
          .indicatorMarginRight(24)//margin right, in dp
          .indicatorPopupAnimationStyle(android.R.style.Animation_Toast)//animation style (parent is android:Animation, you should change windowEnter/ExitAnimation) 
          .build()
      );

Extension (FastScroll-Everywhere!)

• If you want to add the fast-scroll feature to your CustomScrollableView, just copy the source code of FastScrollRecyclerView(or any FastScrollXxxxView) and change the super-class to your CustomScrollableView.
• Then, all done. All things are handled by FastScrollDelegate

Developed By

Mixiaoxiao(谜小小) - xiaochyechye@gmail.com or mixiaoxiaogogo@163.com

License

Copyright 2016 Mixiaoxiao

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.