先看效果图：
我们知道实现recyclerview复杂布局，可以用recyclerview嵌套可以实现。
注：具体使用嵌套还是本文介绍的这种方法，需要根据项目的需求来确定
本文主要说可以根据布局管理器GridLayoutManager的setSpanSizeLookup方法来动态控制。后面具体介绍。
看下setSpanSizeLookup源码：
/** 设置源获取适配器中每个
item占用的跨度数。
* Sets
the source
to get the number of spans occupied
by each
item in the adapter.
*
*用于查询跨越数的实例 每个
item占用
* @param spanSizeLookup {@link SpanSizeLookup} instance
to be used
to query
number of spans
*
* occupied
by each
item
*/
public void setSpanSizeLookup(SpanSizeLookup spanSizeLookup) {
mSpanSizeLookup = spanSizeLookup;
}
首先我们需要重写两个方法
getItemViewType(int position)和
onAttachedToRecyclerView(RecyclerView recyclerView)
@Override
public int getItemViewType(
int position) {
/**
* 根据position设置我们需要的itemtype
* */
if (position==
0){
return TYPE_SLIDER;
}
}
onAttachedToRecyclerView：
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
if (manager
instanceof GridLayoutManager) {
final GridLayoutManager gridManager = ((GridLayoutManager) manager);
gridManager.setSpanSizeLookup(
new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(
int position) {
/**
* 根据GridLayoutManager的getSpanSize方法可以动态的设置item跨列数
* 需要设置：4个参数的GridLayoutManager
* new GridLayoutManager(getActivity(),6,GridLayoutManager.VERTICAL,false);
* 这里的6（自己设置的最好设置成偶数）就相当于分母，6默认显示一整行（1列），下面的3 和2 就相当于分子，返回3就是（1/2）所以此类型对应的是2列，返回2就是（1/3）所以此类型对应的是3列
* */
int type = getItemViewType(position);
switch (type) {
case TYPE_SLIDER:
return gridManager.getSpanCount();
}
}
});
}
}
setSpanSizeLookup：这个方法，在上面的源码中我们可以看到，主要是控制每个item占用的跨度数
奉上适配器完整代码
/**
* Created by sswl on 2017/5/3.
*/
public
class OneAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements BaseSliderView.OnSliderClickListener{
public static
final int TYPE_SLIDER =
0x001;
public static
final int TYPE_TYPE2_HEAD =
0x002;
public static
final int TYPE_TYPE2 =
0x003;
public static
final int TYPE_TYPE3_HEAD =
0x004;
public static
final int TYPE_TYPE3 =
0x005;
public static
final int TYPE_TYPE4 =
0x006;
private Context mCtx;
private final LayoutInflater inflater;
public OneAdapter(Context mCtx){
this.mCtx=mCtx;
inflater = LayoutInflater.from(mCtx);
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType){
case TYPE_SLIDER:
return new SliderViewHolder(inflater.inflate(R.layout.slider_type,parent,
false));
case TYPE_TYPE2_HEAD:
case TYPE_TYPE3_HEAD:
return new HeadViewHolder(inflater.inflate(R.layout.headtitle_item,parent,
false));
case TYPE_TYPE2:
case TYPE_TYPE3:
case TYPE_TYPE4:
return new TypeViewHolder(inflater.inflate(R.layout.one_item_type_1,parent,
false));
default:
return null;
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder instanceof SliderViewHolder){
bindItemTypeSlider((SliderViewHolder) holder, position);
}
else if (holder instanceof HeadViewHolder){
bindType1Head((HeadViewHolder) holder, position);
}
else if (holder instanceof TypeViewHolder){
bindType1((TypeViewHolder) holder, position);
}
}
private void bindType1(TypeViewHolder holder, int position) {
}
private void bindType1Head(HeadViewHolder holder, int position) {
}
/**
* 实现轮播图
* */
private void bindItemTypeSlider(SliderViewHolder holder, int position) {
HashMap<String,String> url_maps =
new HashMap<String, String>();
url_maps.put(
"轮播图1",
"http://static2.hypable.com/wp-content/uploads/2013/12/hannibal-season-2-release-date.jpg");
url_maps.put(
"轮播图2",
"http://cdn3.nflximg.net/images/3093/2043093.jpg");
url_maps.put(
"轮播图3",
"http://images.boomsbeat.com/data/images/full/19640/game-of-thrones-season-4-jpg.jpg");
for(String name : url_maps.keySet()){
DefaultSliderView sliderView =
new DefaultSliderView(mCtx);
sliderView
.description(name)
.image(url_maps.get(name))
.setScaleType(BaseSliderView.ScaleType.Fit).setOnSliderClickListener(
this);
sliderView.bundle(
new Bundle());
sliderView.getBundle()
.putString(
"extra",name);
holder.slider.setDuration(
4000);
holder.slider.addSlider(sliderView);
}
}
@Override
public int getItemCount() {
return 41;
}
@Override
public int getItemViewType(int position) {
/**
* 指定position显示返回对应的itemType
* */
if (position==
0){
return TYPE_SLIDER;
}
else if(position==
1){
return TYPE_TYPE2_HEAD;
}
else if(position>=
2 && position<=
7){
return TYPE_TYPE2;
}
else if(position==
8){
return TYPE_TYPE3_HEAD;
}
else if(position>=
9 && position<=
14){
return TYPE_TYPE3;
}
else if (
15<=position && position <=
18){
return TYPE_TYPE4;
}
else {
return TYPE_TYPE2;
}
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
if (manager instanceof GridLayoutManager) {
final GridLayoutManager gridManager = ((GridLayoutManager) manager);
gridManager.setSpanSizeLookup(
new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int position) {
int
type = getItemViewType(position);
/**
* 根据GridLayoutManager的getSpanSize方法可以动态的设置item跨列数
* 需要设置：4个参数的GridLayoutManager
* new GridLayoutManager(getActivity(),6,GridLayoutManager.VERTICAL,false);
* 这里的6（自己设置的最好设置成偶数）就相当于分母，6默认显示一整行（1列），下面的3 和2 就相当于分子，返回3就是（1/2）所以此类型对应的是2列，返回2就是（1/3）所以此类型对应的是3列
* */
switch (
type) {
case TYPE_SLIDER:
case TYPE_TYPE2_HEAD:
case TYPE_TYPE3_HEAD:
case TYPE_TYPE4:
return gridManager.getSpanCount();
case TYPE_TYPE2:
return 3;
case TYPE_TYPE3:
return 2;
default:
return 3;
}
}
});
}
}
/**
* 轮播图点击事件
* */
@Override
public void onSliderClick(BaseSliderView slider) {
Toast.makeText(mCtx,slider.getBundle().get(
"extra") +
"", Toast.LENGTH_SHORT).show();
}
class SliderViewHolder extends RecyclerView.ViewHolder{
public SliderLayout slider;
public SliderViewHolder(View itemView) {
super(itemView);
slider = (SliderLayout) itemView.findViewById(R.id.slider);
}
}
/**
* head
* */
class HeadViewHolder extends RecyclerView.ViewHolder{
public ImageView image;
public HeadViewHolder(View itemView) {
super(itemView);
}
}
/**
* 条目显示占多少列（这里由 setSpanSizeLookup动态控制）
* */
class TypeViewHolder extends RecyclerView.ViewHolder{
public ImageView image;
public TypeViewHolder(View itemView) {
super(itemView);
image= (ImageView) itemView.findViewById(R.id.item_img_type1);
}
}
}
到这里结束了!主要介绍了主要的思路！ 本人描述能力有限，欢迎吐槽！
最后奉上demo：http://download.csdn.net/download/qq_34501274/9834284
