1，列表布局
//设置布局管理器
recyclerview.setLayoutManager(new GridLayoutManager(context, 2));
recyclerview.addItemDecoration(new RecyclerGridDecoration(context));
//设置Adapter
@Override
public int getItemViewType(int position) {
if (position ==0) {
return HEADER;
}else {
return ITEM;
}
}
@Override
public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
if (managerinstanceof GridLayoutManager) {
final GridLayoutManager gridManager = ((GridLayoutManager) manager);
gridManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int position) {
int type = getItemViewType(position);
switch (type) {//设置每种类型的列数
case ITEM:
case HEADER:
return 1;
default:
return 2;
}
}
});
}
}
1，瀑布流布局
//设置布局管理器
StaggeredGridLayoutManager manager =new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
// manager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_NONE);
// recyclerview.addOnScrollListener(new RecyclerView.OnScrollListener() {
// @Override
// public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
// super.onScrollStateChanged(recyclerView, newState);
// manager.invalidateSpanAssignments(); //防止第一行到顶部有空白区域
// }
// });
recyclerview.setLayoutManager(manager);
@NonNull
@Override
public RecyclerView.ViewHolderonCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if (viewType ==HEADER) {
View view = LayoutInflater.from(context).inflate(R.layout.holder_main_home_viewpager, parent, false);
//设置头部宽度满屏
StaggeredGridLayoutManager.LayoutParams params = (StaggeredGridLayoutManager.LayoutParams) view.getLayoutParams();
params.setFullSpan(true);
return new HeaderHolder(view);
}else {
View view = LayoutInflater.from(context).inflate(R.layout.holder_home_goods, parent, false);
return new ViewHolder(view);
}
}
//设置图片高度
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) holder.img.getLayoutParams();