Android使用分类型RecyclerView仿各大商城首页

**正所谓，一入商城深似海~
商城类的App，确实是有许多东西值得学习，但是只要略微斟酌一下，你又会发现，它们之间存在着许多不谋而合的相似，也就是所谓的雷同~既然如此，让我们也来接下地气，先从一个简单的首页做起吧~**

实现的效果如下图：

1.大布局就是一个简单的RecyclerView：

也可以通过添加多个header实现

4.这里我仅以四种类型为例

/**
 * 4种类型
 */
 /**
 * 类型1：黑色星期五--使用banner实现
 */
 public static final int BLACK_5_BANNER0 = 0;
 /**
 *类型2：今日新品--使用GridView实现
 */
 public static final int TODAY_NEW_GV1 = 1;
 /**
 * 类型3：品牌福利--使用ImageView实现
 */
 public static final int PIN_PAI_IV2=2; 

 /**
 * 类型4：搭配趋势--使用RecyclerView实现
 */
 public static final int DAPEIQS_GV3 =3; 

 /**
 * 当前类型
 */
 public int currentType = BLACK_5_BANNER0;

写构造器并传入参数，完善getItemCount() 和 getItemType()方法

/**
  * 数据对象
  */
 private final Context mContext;
 private final List<WomenBean.WomenData.ModuleBean> moduleBeanList;
 //以后用它来初始化布局
 private final LayoutInflater mLayoutInflater; 

 //构造器
 public HomeRecycleViewAdapter3(Context mContext, List<WomenBean.WomenData.ModuleBean> moduleBeanList) {
  this.mContext = mContext;
  this.moduleBeanList = moduleBeanList;
  //以后用它来初始化布局
  mLayoutInflater = LayoutInflater.from(mContext);
 } 

 @Override
 public int getItemCount() {
  //以后完成后改为4，现在只完成第一种类型暂时写1
  return 1;
 } 

 @Override
 public int getItemViewType(int position) {
  switch (position) {
   case BLACK_5_BANNER0:
    currentType = BLACK_5_BANNER0;
    break;
   case TODAY_NEW_GV1:
    currentType = TODAY_NEW_GV1;
    break;
   case PIN_PAI_IV2:
    currentType = PIN_PAI_IV2;
    break;
   case DAPEIQS_GV3:
    currentType = DAPEIQS_GV3;
    break;
  }
  return currentType;
 }

5.下面就来一一实现这四种类型

5.1设置 第1种类型–黑色星期五（使用的是banner）的适配器

@Override
 public int getItemCount() {
  //以后完成后改为4，现在只完成第一种类型暂时写1
  return 1;
 } 

 @Override
 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  if (viewType == BLACK_5_BANNER0) {
   return new BBNViewHolder(mContext, mLayoutInflater.inflate(R.layout.banner_viewpager, null));
  }
  return null;
 } 

 @Override
 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
  if (getItemViewType(position) == BLACK_5_BANNER0) {
   BBNViewHolder bbnViewHolder = (BBNViewHolder) holder;
   List<WomenBean.WomenData.ModuleBean.DataBean> module0data = moduleBeanList.get(0).getData();
   bbnViewHolder.setData(module0data);
  }
 } 

 public class BBNViewHolder extends RecyclerView.ViewHolder {
  private final Context mContext;
  private Banner banner; 

  public BBNViewHolder(Context mContext, View itemView) {
   super(itemView);
   this.mContext = mContext;
   banner = (Banner) itemView.findViewById(R.id.banner);
  } 

  public void setData(List<WomenBean.WomenData.ModuleBean.DataBean> module0data) {
   //得到图片地址的集合
   List<String> imageUrls = new ArrayList<>();
   for (int i = 0; i < module0data.size(); i++) {
    String image = module0data.get(i).getImg();
    imageUrls.add(image);
   }
   //新版的banner的使用----偷下懒的使用方法
   banner.setImages(imageUrls).setImageLoader(new GlideImageLoader()).start();
  }
 } 

 public class GlideImageLoader extends ImageLoader {
  @Override
  public void displayImage(Context context, Object path, ImageView imageView) { 

   imageView.setScaleType(ImageView.ScaleType.FIT_XY); 

   //Glide 加载图片简单用法
   Glide.with(context).load(path).into(imageView);
  }
 }

5.2设置 第2种类型–今日新品–（使用GridView实现）的适配器

public class TodayGVAdapter extends BaseAdapter { 

 private final Context mContext;
 private final List<WomenBean.WomenData.ModuleBean.DataBean> module1data; 

 public TodayGVAdapter(Context mContext, List<WomenBean.WomenData.ModuleBean.DataBean> module1data) {
  this.mContext = mContext;
  this.module1data = module1data;
 } 

 @Override
 public int getCount() {
  return module1data == null ? 0 : module1data.size();
 } 

 @Override
 public Object getItem(int i) {
  return null;
 } 

 @Override
 public long getItemId(int i) {
  return 0;
 } 

 @Override
 public View getView(int position, View convertView, ViewGroup viewGroup) {
  ViewHolder holder;
  if (convertView == null) {
   //item的布局：垂直线性，ImagView+TextView
   convertView = View.inflate(mContext, R.layout.item_channel, null);
   holder = new ViewHolder();
   holder.iv_channel = (ImageView) convertView.findViewById(R.id.iv_channel);
   holder.tv_channel = (TextView) convertView.findViewById(R.id.tv_channel);
   convertView.setTag(holder);
  } else {
   holder = (ViewHolder) convertView.getTag();
  } 

  //装配数据
  WomenBean.WomenData.ModuleBean.DataBean datasig = module1data.get(position); 

  //使用Glide加载图片
  Glide.with(mContext).load(datasig.getImg()).into(holder.iv_channel);
  //设置文本
  holder.tv_channel.setText(datasig.getTitle()); 

  return convertView;
 } 

 public static class ViewHolder {
  public ImageView iv_channel;
  public TextView tv_channel;
 }
}

5.3 第3种类型–品牌福利–（直接使用ImagView）

@Override
 public int getItemCount() {
  //以后完成后改为4，现在只完成第3种类型暂时写3
  return 3;
 } 

 @Override
 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  if (viewType == BLACK_5_BANNER0) {
   return new BBNViewHolder(mContext, mLayoutInflater.inflate(R.layout.banner_viewpager, null));
  } else if (viewType == TODAY_NEW_GV1) {
   return new TODAYViewHolder(mContext, mLayoutInflater.inflate(R.layout.gv_channel, null));
  } else if (viewType == PIN_PAI_IV2) {
   return new PINPAIViewHolder(mContext, mLayoutInflater.inflate(R.layout.iv_pinpai, null));
  }
  return null;
 } 

 @Override
 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
  if (getItemViewType(position) == BLACK_5_BANNER0) {
   BBNViewHolder bbnViewHolder = (BBNViewHolder) holder;
   List<WomenBean.WomenData.ModuleBean.DataBean> module0data = moduleBeanList.get(0).getData();
   bbnViewHolder.setData(module0data);
  } else if (getItemViewType(position) == TODAY_NEW_GV1) {
   TODAYViewHolder todayViewHolder = (TODAYViewHolder) holder;
   List<WomenBean.WomenData.ModuleBean.DataBean> module1data = moduleBeanList.get(1).getData();
   todayViewHolder.setData(module1data);
  } else if (getItemViewType(position) == PIN_PAI_IV2) {
   PINPAIViewHolder pinpaiViewHolder = (PINPAIViewHolder) holder;
   List<WomenBean.WomenData.ModuleBean.DataBean> pinpai2data = moduleBeanList.get(2).getData();
   pinpaiViewHolder.setData(pinpai2data);
  }
 } 

 class PINPAIViewHolder extends RecyclerView.ViewHolder {
  private final Context mContext;
  @Bind(R.id.iv_new_chok)
  ImageView ivNewChok; 

  PINPAIViewHolder(Context mContext, View itemView) {
   super(itemView);
   this.mContext = mContext;
   ButterKnife.bind(this, itemView);
   ivNewChok = (ImageView) itemView.findViewById(R.id.iv_new_chok);
  } 

  public void setData(List<WomenBean.WomenData.ModuleBean.DataBean> pinpai2data) {
   //使用Glide加载图片
   Glide.with(mContext)
     .load(pinpai2data.get(0).getImg())
     .diskCacheStrategy(DiskCacheStrategy.ALL)
     .crossFade() //设置淡入淡出效果，默认300ms，可以传参
     .into(ivNewChok);
  }
 }

5.4设置 第4种类型–搭配趋势–（使用RecyclerView实现）的适配器

@Override
 public int getItemCount() {
  //四种类型都已经完成，返回4
  return 4;
 } 

 @Override
 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  if (viewType == BLACK_5_BANNER0) {
   return new BBNViewHolder(mContext, mLayoutInflater.inflate(R.layout.banner_viewpager, null));
  } else if (viewType == TODAY_NEW_GV1) {
   return new TODAYViewHolder(mContext, mLayoutInflater.inflate(R.layout.gv_channel, null));
  } else if (viewType == PIN_PAI_IV2) {
   return new PINPAIViewHolder(mContext, mLayoutInflater.inflate(R.layout.iv_pinpai, null));
  } else if (viewType == DAPEIQS_GV3) {
   //布局：垂直线性，TextView+RecyclerView
   return new DaPeiViewHolder(mContext, mLayoutInflater.inflate(R.layout.dapeiqs_rv, null));
  }
  return null;
 } 

 @Override
 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
  if (getItemViewType(position) == BLACK_5_BANNER0) {
   BBNViewHolder bbnViewHolder = (BBNViewHolder) holder;
   List<WomenBean.WomenData.ModuleBean.DataBean> module0data = moduleBeanList.get(0).getData();
   bbnViewHolder.setData(module0data);
  } else if (getItemViewType(position) == TODAY_NEW_GV1) {
   TODAYViewHolder todayViewHolder = (TODAYViewHolder) holder;
   List<WomenBean.WomenData.ModuleBean.DataBean> module1data = moduleBeanList.get(1).getData();
   todayViewHolder.setData(module1data);
  } else if (getItemViewType(position) == PIN_PAI_IV2) {
   PINPAIViewHolder pinpaiViewHolder = (PINPAIViewHolder) holder;
   List<WomenBean.WomenData.ModuleBean.DataBean> pinpai2data = moduleBeanList.get(2).getData();
   pinpaiViewHolder.setData(pinpai2data);
  } else if (getItemViewType(position) == DAPEIQS_GV3) {
   DaPeiViewHolder dapeiViewHolder = (DaPeiViewHolder) holder;
   List<WomenBean.WomenData.ModuleBean.DataBean> dapeiqs6data = moduleBeanList.get(6).getData();
   dapeiViewHolder.setData(dapeiqs6data);
  }
 } 

 class DaPeiViewHolder extends RecyclerView.ViewHolder {
  private final Context mContext;
  private RecyclerView dapeiqs_rv; 

  public DaPeiViewHolder(Context mContext, View itemView) {
   super(itemView);
   this.mContext = mContext;
   dapeiqs_rv = (RecyclerView) itemView.findViewById(R.id.dapeiqs_rv);
  } 

  public void setData(List<WomenBean.WomenData.ModuleBean.DataBean> dapeiqs6data) {
   //1.已有数据
   //2.设置适配器
   DaPeiQSRecycleViewAdapter adapter = new DaPeiQSRecycleViewAdapter(mContext, dapeiqs6data);
   dapeiqs_rv.setAdapter(adapter); 

   //recycleView不仅要设置适配器还要设置布局管理者,否则图片不显示
   LinearLayoutManager manager = new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false);
   dapeiqs_rv.setLayoutManager(manager);
  }
 }

public class DaPeiQSRecycleViewAdapter extends RecyclerView.Adapter {
 private final Context mContext;
 private final List<WomenBean.WomenData.ModuleBean.DataBean> dapeiqs6data; 

 public DaPeiQSRecycleViewAdapter(Context mContext, List<WomenBean.WomenData.ModuleBean.DataBean> dapeiqs6data) {
  this.mContext = mContext;
  this.dapeiqs6data = dapeiqs6data;
 } 

 @Override
 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  return new MyViewHolder(LayoutInflater.from(mContext).inflate(R.layout.item_dapeiqs, null));
 } 

 @Override
 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
  MyViewHolder myViewHolder = (MyViewHolder) holder;
  myViewHolder.setData(position);
 } 

 @Override
 public int getItemCount() {
  return dapeiqs6data.size();
 } 

 class MyViewHolder extends RecyclerView.ViewHolder {
  private ImageView iv_figure; 

  public MyViewHolder(View itemView) {
   super(itemView);
   iv_figure = (ImageView) itemView.findViewById(R.id.iv_figure);
  } 

  public void setData(int position) {
   WomenBean.WomenData.ModuleBean.DataBean dapeiBean = dapeiqs6data.get(position);
   //使用Glide加载图片
   Glide.with(mContext)
     .load(dapeiBean.getImg())
     .into(iv_figure);
  }
 }
}

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