RecycleView 瀑布流滑动移位

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RecycleView StaggeredLayoutManager(瀑布流)滑动的时候，默认会出现item移动的问题，需以下来个步骤来解决：

附上StaggeredLayoutManager中的一段源码：

 /**

      * Does not do anything to hide gaps.

      */

     public static final int GAP_HANDLING_NONE = 0;

     @Deprecated

     public static final int GAP_HANDLING_LAZY = 1;

     /**

      * When scroll state is changed to {@link RecyclerView#SCROLL_STATE_IDLE}, StaggeredGrid will

      * check if there are gaps in the because of full span items. If it finds, it will re-layout

      * and move items to correct positions with animations.

      * <p>

      * For example, if LayoutManager ends up with the following layout due to adapter changes:

      * <pre>

      * AAA

      * _BC

      * DDD

      * </pre>

      * <p>

      * It will animate to the following state:

      * <pre>

      * AAA

      * BC_

      * DDD

      * </pre>

      */

     public static final int GAP_HANDLING_MOVE_ITEMS_BETWEEN_SPANS = 2;