本文介绍了如何使用XRecyclerView库来处理包含多种条目类型的数据，并实现Banner轮播图功能。首先，文章讲解了XRecyclerView的依赖引入，接着详细阐述了如何在Adapter中处理不同类型的视图，最后讨论了设置Banner轮播图的步骤和关键代码。
依赖：
implementation 'com.jcodecraeer:xrecyclerview:1.5.9' //部分版本问题需要导入此依赖 implementation 'com.android.support:design:27.1.1'
//轮播图 implementation 'com.youth.banner:banner:1.4.9' implementation 'com.nostra13.universalimageloader:universal-image-loader:1.9.5' implementation 'com.github.bumptech.glide:glide:3.7.0'
implementation 'com.squareup.okhttp3:okhttp:3.11.0' implementation 'com.google.code.gson:gson:2.8.5' //项目要求圆形图片展示 implementation 'com.facebook.fresco.helper:fresco-helper:2.1.0'
package com.example.jiangxi.nigthwork.adapter;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.example.jiangxi.nigthwork.R;
import com.example.jiangxi.nigthwork.bean.GoodsBean;
import com.example.jiangxi.nigthwork.util.MyBanner;
import com.facebook.drawee.view.SimpleDraweeView;
import com.youth.banner.Banner;
import java.util.ArrayList;
import java.util.List;
public class MyAdapter extends RecyclerView.Adapter{
//图片地址
private String url1 = "http://d.5857.com/wmgf_160811/001.jpg";
private String url2 = "http://d.5857.com/wmgf_160811/002.jpg";
private String url3 = "http://d.5857.com/wmgf_160811/003.jpg";
//存放图片的集合
List<String> list1 = new ArrayList<>();
//定义四种类型
public static final int TYPE_ONE = 0;
public static final int TYPE_TWO = 1;
public static final int TYPE_THREE = 2;
public static final int TYPE_FOUR = 3;
private Context context;
private List<GoodsBean.DataBean> list;
public MyAdapter(Context context, List<GoodsBean.DataBean> list) {
this.context = context;
this.list = list;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view;
if (viewType == TYPE_ONE) {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, null);
return new ViewHolder(view);
} else if (viewType == TYPE_TWO) {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item2, null);
return new TypeTwoHolder(view);
}else if (viewType == TYPE_THREE){
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item3,null);
return new TypeThreeHolder(view);
}else {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item4,null);
return new TypeFourHolder(view);
}
}
@Override
public int getItemViewType(int position) {
//按照项目要求条目一显示为三个图片，条目二为轮播图，条目三和条目四按规律往下循环
//下标为偶数且下标不能为0
if (position%2 == 0 && position !=0){
return TYPE_FOUR;
//下标为奇数且下标不能为1
}else if (position%2 == 1 && position != 1){
return TYPE_THREE;
//条目一
}else if (position == 0){
return TYPE_ONE;
//条目二
}else if (position == 1){
return TYPE_TWO;
}
return super.getItemViewType(position);
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
//获得下标类型
int itemViewType = getItemViewType(position);
switch (itemViewType){
case TYPE_ONE:
ViewHolder holder1 = (ViewHolder) holder;
// Glide.with(context).load(list.get(position).getImages().split("\\|")[0]).into(holder1.iv1);
// Glide.with(context).load(list.get(position).getImages().split("\\|")[0]).into(holder1.iv2);
// Glide.with(context).load(list.get(position).getImages().split("\\|")[0]).into(holder1.iv3);
((ViewHolder) holder).iv1.setImageURI(list.get(position).getImages().split("\\|")[0]);
((ViewHolder) holder).iv2.setImageURI(list.get(position).getImages().split("\\|")[1]);
((ViewHolder) holder).iv3.setImageURI(list.get(position).getImages().split("\\|")[2]);
break;
case TYPE_TWO:
TypeTwoHolder holder2 = (TypeTwoHolder) holder;
list1.add(url1);
list1.add(url2);
list1.add(url3);
holder2.banner.setImageLoader(new MyBanner());
holder2.banner.setImages(list1);
holder2.banner.start();
break;
case TYPE_THREE:
TypeThreeHolder holder3 = (TypeThreeHolder) holder;
// Glide.with(context).load(list.get(position).getImages().split("\\|")[0]).into(holder3.it3Iv1);
// Glide.with(context).load(list.get(position).getImages().split("\\|")[0]).into(holder3.it3Iv2);
holder3.it3Iv1.setImageURI(list.get(position).getImages().split("\\|")[2]);
holder3.it3Iv2.setImageURI(list.get(position).getImages().split("\\|")[2]);
holder3.it3Tv1.setText(list.get(position).getTitle());
break;
case TYPE_FOUR:
TypeFourHolder holder4 = (TypeFourHolder) holder;
Glide.with(context).load(list.get(position).getImages().split("\\|")[2]).into(holder4.it4Iv1);
holder4.it4Tv.setText(list.get(position).getTitle());
break;
}
}
@Override
public int getItemCount() {
return list.size();
}
//每一个类型对应一个Holder
public class ViewHolder extends RecyclerView.ViewHolder {
SimpleDraweeView iv1;
SimpleDraweeView iv2;
SimpleDraweeView iv3;
public ViewHolder(View itemView) {
super(itemView);
iv1 = itemView.findViewById(R.id.iv1);
iv2 = itemView.findViewById(R.id.iv2);
iv3 = itemView.findViewById(R.id.iv3);
}
}
class TypeTwoHolder extends RecyclerView.ViewHolder {
Banner banner;
public TypeTwoHolder(View itemView) {
super(itemView);
banner = itemView.findViewById(R.id.banner);
}
}
class TypeThreeHolder extends RecyclerView.ViewHolder {
SimpleDraweeView it3Iv1 ;
TextView it3Tv1;
SimpleDraweeView it3Iv2;
public TypeThreeHolder(View itemView) {
super(itemView);
it3Iv1 = itemView.findViewById(R.id.item3_iv1);
it3Iv2 = itemView.findViewById(R.id.item3_iv2);
it3Tv1 = itemView.findViewById(R.id.item3_tv1);
}
}
class TypeFourHolder extends RecyclerView.ViewHolder {
ImageView it4Iv1;
TextView it4Tv;
public TypeFourHolder(View itemView) {
super(itemView);
it4Iv1 = itemView.findViewById(R.id.item4_iv1);
it4Tv = itemView.findViewById(R.id.item4_tv);
}
}
}
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