Android RecyclerView瀑布流位置变化和顶部留白

[code=language-java]layoutManager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_NONE);

[code=language-java]mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
//防止第一行到顶部有空白区域
layoutManager.invalidateSpanAssignments();
}
});