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RecyclerView實(shí)現(xiàn)仿支付寶應(yīng)用管理

更新時間：2018年04月09日 11:50:48 作者：huangjie_android

這篇文章主要為大家詳細(xì)介紹了RecyclerView實(shí)現(xiàn)仿支付寶應(yīng)用管理的相關(guān)資料，具有一定的參考價值，感興趣的小伙伴們可以參考一下

前言

由于公司項(xiàng)目有一個應(yīng)用管理的功能和支付寶的應(yīng)用管理功能非常像，所有的信息都是從服務(wù)端拉去的數(shù)據(jù)動態(tài)生成，有不同的應(yīng)用分類，有標(biāo)題等等信息。對于實(shí)現(xiàn)這種效果可以用ListView 或者RecyclerView通過加載多種布局來實(shí)現(xiàn)。我們首先需要分析怎么把效果圖拆分成幾種布局

效果圖

從上面的圖片中我們可以把布局分為三種類型，其中第一種布局le是

第二種布局類型是：

第三種布局類型

使用RecyclerView加載多種布局，很多人都會，但是這里每排顯示的子應(yīng)用數(shù)量是不同的，而所有的數(shù)據(jù)都是來自同一個數(shù)據(jù)集合，而且所有的都是現(xiàn)實(shí)都是動態(tài)生成，所以不可能寫死。這個時候是時候來了解GridLayoutManager的setSpanSizeLookup()方法了。具體使用方法我就不介紹啦，貼上官方文檔鏈接

核心代碼：

mLayoutManager = new GridLayoutManager(this, 4);

 mLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
  @Override
  public int getSpanSize(int position) {
  ApplicationBean applicationBean = mDataList.get(position);
  if (applicationBean.getType() == ApplicationBean.Type.TypeOne) {
   return 4;
  } else if (applicationBean.getType() == ApplicationBean.Type.TypeTwo) {
   return 2;
  } else if (applicationBean.getType() == ApplicationBean.Type.TypeThree) {
   return 1;
  } else {
   return 0;
  }
  }
 });
 mRecyclerView.setLayoutManager(mLayoutManager);
 mAdapter = new ApplicationAdapter(mDataList, this);
 mRecyclerView.setAdapter(mAdapter);

adapter代碼

package com.huangjie.recyclerview;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;

/**
 * Created by huangjie on 2017/11/12.
 */

public class ApplicationAdapter extends RecyclerView.Adapter {
 //布局類型
 private static final int VIEW_TYPE_ONE = 1;
 private static final int VIEW_TYPE_TWO = 2;
 private static final int VIEW_TYPE_THREE = 3;
 private LayoutInflater inflater;
 private Context mContext;
 private ArrayList<ApplicationBean> mDataList;

 public ApplicationAdapter(ArrayList<ApplicationBean> mDataList, Context context) {
 this.mDataList = mDataList;
 mContext = context;
 inflater = LayoutInflater.from(mContext);
 }

 @Override
 public int getItemViewType(int position) {

 if (mDataList.get(position).getType() == ApplicationBean.Type.TypeOne) {
  return VIEW_TYPE_ONE;
 } else if (mDataList.get(position).getType() == ApplicationBean.Type.TypeTwo) {
  return VIEW_TYPE_TWO;
 } else if (mDataList.get(position).getType() == ApplicationBean.Type.TypeThree) {
  return VIEW_TYPE_THREE;
 } else {
  return 0;
 }
 }

 @Override
 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
 RecyclerView.ViewHolder viewHolder = null;
 switch (viewType) {
  case VIEW_TYPE_ONE:
  viewHolder = new ViewHolderOne(inflater.inflate(R.layout.item_one, parent, false));
  break;
  case VIEW_TYPE_TWO:
  viewHolder = new ViewHolderTwo(inflater.inflate(R.layout.item_two, parent, false));
  break;
  case VIEW_TYPE_THREE:
  viewHolder = new ViewHolderThree(inflater.inflate(R.layout.item_three, parent, false));
  break;
 }
 return viewHolder;
 }

 @Override
 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {

 switch (getItemViewType(position)) {
  case VIEW_TYPE_ONE:
  Log.e("huangjie", mDataList.get(position).getTitle());
  ((ViewHolderOne) holder).title.setText(mDataList.get(position).getTitle());
  break;
  case VIEW_TYPE_TWO:
  ((ViewHolderTwo) holder).title.setText(mDataList.get(position).getName());
  ((ViewHolderTwo) holder).information.setText(mDataList.get(position).getInformation());
  ((ViewHolderTwo) holder).icon.setImageDrawable(
   mContext.getResources().getDrawable(mDataList.get(position).getIcon()));
  break;
  case VIEW_TYPE_THREE:
  ((ViewHolderThree) holder).title.setText(mDataList.get(position).getName());
  ((ViewHolderThree) holder).icon.setImageDrawable(
   mContext.getResources().getDrawable(mDataList.get(position).getIcon()));

  break;
 }
 }

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


 /**
 * 第一種布局類型ViewHolder
 */
 public static class ViewHolderOne extends RecyclerView.ViewHolder {
 private TextView title;

 public ViewHolderOne(View itemView) {
  super(itemView);
  title = (TextView) itemView.findViewById(R.id.text);
 }
 }

 /**
 * 第二種布局類型ViewHolder
 */
 public static class ViewHolderTwo extends RecyclerView.ViewHolder {
 private ImageView icon;
 private TextView title;
 private TextView information;

 public ViewHolderTwo(View itemView) {
  super(itemView);
  icon = (ImageView) itemView.findViewById(R.id.image);
  title = (TextView) itemView.findViewById(R.id.title);
  information = (TextView) itemView.findViewById(R.id.infor);
 }
 }

 /**
 * 第三種布局類型viewholder
 */
 public static class ViewHolderThree extends RecyclerView.ViewHolder {
 private ImageView icon;
 private TextView title;

 public ViewHolderThree(View itemView) {
  super(itemView);
  icon = (ImageView) itemView.findViewById(R.id.image);
  title = (TextView) itemView.findViewById(R.id.title);
 }
 }
}