设置RecyclerView 的间隔代码示例

RecyclerView.addItemDecoration(new RecyclerView.ItemDecoration(){

@override

public void getItemOffsets(Rect outRect,View view , RecyclerView parent, RecyclerView.State state){

  GridLayoutManager.LayoutParams lp = (GridLayoutManager.LayoutParams) view.getLayoutParams();

  int spanSize = lp.getSpanSize();

  int spanIndex = lp.getSpanIndex();

  outRect.top = 20;

  if(spanSize != gridLayoutManager.getSpanCount()){

    if(spanIndex ==1){ outRect.left = 10;}else{ outRect.right=10;}

  }

}

});

GridLayoutManager.SpanSizeLookup的getSpanSize(int position)方法根据position 配个 RecyclerView的Adapter的getItemViewType(position)方法得到对应position的View类型，进而决定返回该View所应占用的SpanSize的大小：

public int getSpanSize(int position){

  int type = mRecyclerView.getAdapter().getItemViewType(position);

  if(type ==DataModel.TYPE_THREE){ return gridLayoutManager.getSpanCount();}

  else { return 1;}

}

GridLayoutManager中的setSpanSizeLookup(GridLayoutManager.SpanSizeLookup)方法可以根据position返回每个Item占用几个Span;GridLayoutManager.SpanSizeLookup.getSpanSize(int position)

GridLayoutManager示例实现Grid与List混排

笔记见截图

recyclerView = (RecyclerView) findViewById(R.id.my_rv);
        GridLayoutManager manager = new GridLayoutManager(this, 6);
        manager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {            @Override
            public int getSpanSize(int position) {                if (position < 7 || position > 14) {                    return 3;
                }                return 2;
            }
        });
        recyclerView.setLayoutManager(manager);
        adapter = new MyAdapter(this);
        recyclerView.setAdapter(adapter);作者：Android_小生链接：https://www.jianshu.com/p/29465cce1131來源：简书简书著作权归作者所有，任何形式的转载都请联系作者获得授权并注明出处。