Android手把手教大家制作APP首页（下拉刷新、自动加载）

一、概述

作为一名三年Android开发经验的程序员，今天和大家一起实战一款APP的首页功能，这个首页在我们平时接触中还是很常见的，虽然页面简单，但是里面涉及的功能点还是挺多的。代码如有不足的还望各路同仁指点一二。
页面中使用的开发库：
整个首页架构使用的是LRecyclerView，包含下拉刷新和自动加载功能

compile 'com.github.jdsjlzx:LRecyclerView:1.3.3'

无限循环轮播图使用的是convenientbanner，效果还是很顺畅的，还可以根据自己的需要修改过渡动画

compile 'com.bigkoo:convenientbanner:2.0.5'

图片加载使用的是glide图片库，里面的方法是自己封装的
网络请求依赖是okhttp，使用的开源库okgo

compile 'com.lzy.net:okgo:2.1.4'

其他的还是九宫格图

compile 'com.lzy.widget:ninegridview:0.2.0'

自动注解butterknife库等等

二、实现效果图

1.首页展示轮播图

2.下拉刷新

3.自动加载

4.cardview水波纹动画

三、核心代码

LRecyclerView作为主框架，轮播图以及分类网格列表作为header放在index_header.xml布局文件下。

IndexFragment.java

package com.czhappy.commonindexdemo.fragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v7.widget.LinearLayoutManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.bigkoo.convenientbanner.ConvenientBanner;
import com.bigkoo.convenientbanner.holder.CBViewHolderCreator;
import com.czhappy.commonindexdemo.KuaiZhiApplication;
import com.czhappy.commonindexdemo.R;
import com.czhappy.commonindexdemo.adapter.CampaignListAdapter;
import com.czhappy.commonindexdemo.adapter.ClassflyListAdapter;
import com.czhappy.commonindexdemo.jsonparse.JSONObject;
import com.czhappy.commonindexdemo.jsonparse.ReflectUtil;
import com.czhappy.commonindexdemo.model.CampaignList;
import com.czhappy.commonindexdemo.model.Classfly;
import com.czhappy.commonindexdemo.model.IndexBanner;
import com.czhappy.commonindexdemo.model.IndexBannerList;
import com.czhappy.commonindexdemo.okhttp.LoadingDialogCallback;
import com.czhappy.commonindexdemo.utils.AccordionTransformer;
import com.czhappy.commonindexdemo.utils.Api;
import com.czhappy.commonindexdemo.utils.NetworkImageHolderView;
import com.czhappy.commonindexdemo.utils.ToastUtil;
import com.czhappy.commonindexdemo.view.GridViewForScrollView;
import com.github.jdsjlzx.interfaces.OnLoadMoreListener;
import com.github.jdsjlzx.interfaces.OnRefreshListener;
import com.github.jdsjlzx.recyclerview.LRecyclerView;
import com.github.jdsjlzx.recyclerview.LRecyclerViewAdapter;
import com.github.jdsjlzx.recyclerview.ProgressStyle;
import com.lzy.okgo.OkGo;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;
import okhttp3.Call;
import okhttp3.Response;



public class IndexFragment extends Fragment implements ViewPager.OnPageChangeListener{

 @BindView(R.id.back_iv)
 ImageView backIv;
 @BindView(R.id.layout_back)
 LinearLayout layoutBack;
 @BindView(R.id.title_tv)
 TextView titleTv;
 @BindView(R.id.right_tv)
 TextView rightTv;
 @BindView(R.id.layout_right)
 LinearLayout layoutRight;
 @BindView(R.id.campaign_recyclerview)
 LRecyclerView mRecyclerView;
 private View mView;

 private GridViewForScrollView classflyGridview;
 private LinearLayout pointGroup;;
 private ConvenientBanner convenientBanner;
 private TextView bannerTitleTv;;
 private List networkImages = new ArrayList();
 private int lastPosition = 0;
 private CampaignListAdapter campaignListAdapter;
 private ClassflyListAdapter classflyListAdapter;
 private IndexBannerList indexBannerList;
 private CampaignList campaignList;
 private LRecyclerViewAdapter mLRecyclerViewAdapter;
 public int pageNum = 1;
 public int pageSize = 4;


 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
    Bundle savedInstanceState) {
 mView = inflater.inflate(R.layout.fragment_index, container,
  false);
 ButterKnife.bind(this, mView);
 initView();
 initClassfly();
 return mView;
 }


 private void initView() {
 backIv.setVisibility(View.GONE);
 titleTv.setText("快知网");
 layoutRight.setVisibility(View.INVISIBLE);

 campaignListAdapter = new CampaignListAdapter(getActivity());
 mLRecyclerViewAdapter = new LRecyclerViewAdapter(campaignListAdapter);
 mRecyclerView.setAdapter(mLRecyclerViewAdapter);

 mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

 mRecyclerView.setRefreshProgressStyle(ProgressStyle.LineSpinFadeLoader);
 mRecyclerView.setArrowImageView(R.drawable.ic_pulltorefresh_arrow);
 mRecyclerView.setLoadingMoreProgressStyle(ProgressStyle.BallSpinFadeLoader);

 //add a HeaderView
 final View header = LayoutInflater.from(getActivity()).inflate(R.layout.index_header,(ViewGroup)mView.findViewById(android.R.id.content), false);
 classflyGridview = (GridViewForScrollView) header.findViewById(R.id.classfly_gridview);
 classflyGridview.setFocusable(false);
 pointGroup = (LinearLayout) header.findViewById(R.id.point_group);
 convenientBanner = (ConvenientBanner) header.findViewById(R.id.convenientBanner);
 bannerTitleTv = (TextView) header.findViewById(R.id.banner_title_tv);
 mLRecyclerViewAdapter.addHeaderView(header);

 mRecyclerView.setonRefreshListener(new onRefreshListener() {
  @Override
  public void onRefresh() {
  pageNum = 1;
  doRequest(pageNum, true);
  requestBannerList();
  }
 });

 mRecyclerView.setonLoadMoreListener(new onLoadMoreListener() {
  @Override
  public void onLoadMore() {
  pageNum++;
  doRequest(pageNum, false);

  }
 });

 //设置头部加载颜色
 mRecyclerView.setHeaderViewColor(R.color.colorAccent, R.color.dark ,android.R.color.white);
 //设置底部加载颜色
 mRecyclerView.setFooterViewColor(R.color.colorAccent, R.color.dark ,android.R.color.white);
 //设置底部加载文字提示
 mRecyclerView.setFooterViewHint("拼命加载中","已经全部为你呈现了","网络不给力啊，点击再试一次吧");

 mRecyclerView.setRefreshing(true);

// mLRecyclerViewAdapter.setonItemClickListener(new onItemClickListener() {
//  @Override
//  public void onItemClick(View view, int position) {
//
//  }
//
// });
//
// mLRecyclerViewAdapter.setonItemLongClickListener(new onItemLongClickListener() {
//  @Override
//  public void onItemLongClick(View view, int position) {
//
//  }
// });
 }


 private void initClassfly() {
 List list = new ArrayList();
 Classfly c1 = new Classfly("3", "通知公告", R.mipmap.classfly_bg1);
 Classfly c2 = new Classfly("4", "教育学习", R.mipmap.classfly_bg2);
 Classfly c3 = new Classfly("5", "偶像明星", R.mipmap.classfly_bg3);
 Classfly c4 = new Classfly("6", "特价优惠", R.mipmap.classfly_bg4);
 Classfly c5 = new Classfly("7", "线下活动", R.mipmap.classfly_bg5);
 Classfly c6 = new Classfly("8", "其它", R.mipmap.classfly_bg6);
 list.add(c1);
 list.add(c2);
 list.add(c3);
 list.add(c4);
 list.add(c5);
 list.add(c6);
 classflyListAdapter = new ClassflyListAdapter(getActivity());
 classflyGridview.setAdapter(classflyListAdapter);
 classflyListAdapter.setItems(list);
 classflyGridview.setonItemClickListener(new AdapterView.onItemClickListener() {
  @Override
  public void onItemClick(AdapterView parent, View view, int position, long id) {
  }
 });
 }

 private void doRequest(int page, final boolean isRefresh) {
 OkGo.post(Api.GET_CAMPAIGN_LIST)
  .tag(this)
  .params("currentPage", String.valueOf(page))
  .params("pageSize", String.valueOf(pageSize))
  .execute(new LoadingDialogCallback(getActivity()) {


   @Override
   public void onSuccess(String s, Call call, Response response) {
   if(isRefresh){
    mRecyclerView.refreshComplete();
   }else {
    mRecyclerView.loadMoreComplete();
   }
   try {
    campaignList = (CampaignList) ReflectUtil
     .copy(CampaignList.class,
      new JSonObject(s));
   } catch (Exception e) {
    e.printStackTrace();
   }
   if (campaignList != null) {
    String result = campaignList.getResult();
    if (Api.SUCCESS.equals(result)) {
    int j = campaignList.getData().size();
    if (isRefresh) {
     campaignListAdapter.clear();
    }
    if (j != pageSize) {
     mRecyclerView.setNoMore(true);
    }
    campaignListAdapter.addAll(campaignList.getData());
    }else{
    ToastUtil.show(getActivity(), campaignList.getMsg());
    }
   }
   }

   @Override
   public void onError(Call call, Response response, Exception e) {
   super.onError(call, response, e);
   if(isRefresh){
    mRecyclerView.refreshComplete();
   }else {
    mRecyclerView.loadMoreComplete();
   }
   KuaiZhiApplication.showResultToast(getActivity(), call, e);
   }

  });
 }


 private void requestBannerList() {
 OkGo.post(Api.GET_INDEX_BANNER_LIST)
  .tag(this)
  .cacheKey("cache_index_banner_list")
  .execute(new LoadingDialogCallback(getActivity()) {

   @Override
   public void onCacheSuccess(String s, Call call) {
   super.onCacheSuccess(s, call);
   analysisIndexBannerRequest(s);
   }

   @Override
   public void onSuccess(String s, Call call, Response response) {
   analysisIndexBannerRequest(s);
   }

   @Override
   public void onError(Call call, Response response, Exception e) {
   super.onError(call, response, e);
   KuaiZhiApplication.showResultToast(getActivity(), call, e);
   }
  });
 }

 private void analysisIndexBannerRequest(String s){
 try {
  indexBannerList = (IndexBannerList) ReflectUtil
   .copy(IndexBannerList.class,
    new JSonObject(s));
 } catch (Exception e) {
  e.printStackTrace();
 }
 if (indexBannerList != null) {
  String result = indexBannerList.getResult();
  if (Api.SUCCESS.equals(result)) {
  networkImages.clear();
  for (IndexBanner ib : indexBannerList.getData()) {
   networkImages.add(ib.getBanner_url());
  }
  setRecommendInfo();
  initBanner();
  }else{
  ToastUtil.show(getActivity(), indexBannerList.getMsg());
  }
 }
 }

 private void initBanner() {

 convenientBanner.setPages(new CBViewHolderCreator() {
  @Override
  public NetworkImageHolderView createHolder() {
  return new NetworkImageHolderView();
  }
 }, networkImages)
  .setonPageChangeListener(this);//监听翻页事件
 convenientBanner.setPageTransformer(new AccordionTransformer());
 convenientBanner.startTurning(3000);
 convenientBanner.setonItemClickListener(new com.bigkoo.convenientbanner.listener.onItemClickListener() {
  @Override
  public void onItemClick(int position) {

  }
 });
 }

 private void setRecommendInfo() {
 pointGroup.removeAllViews();
 for (int i = 0; i < indexBannerList.getData().size(); i++) {
  // 添加指示点
  ImageView point = new ImageView(getActivity());
  LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
   LinearLayout.LayoutParams.WRAP_CONTENT,
   LinearLayout.LayoutParams.WRAP_CONTENT);

  if (i != indexBannerList.getData().size() - 1) {
  params.rightMargin = 10;
  }
  point.setLayoutParams(params);

  point.setBackgroundResource(R.drawable.point_bg);
  if (i == 0) {
  point.setEnabled(true);
  } else {
  point.setEnabled(false);
  }
  pointGroup.addView(point);
 }

 }

 @Override
 public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

 }

 @Override
 public void onPageSelected(int position) {
 // 改变指示点的状态
 // 把当前点enbale 为true
 if (indexBannerList != null && indexBannerList.getData() != null && indexBannerList.getData().size() > 0) {
  bannerTitleTv.setText(indexBannerList.getData().get(position).getBanner_title());
 }
 pointGroup.getChildAt(position).setEnabled(true);
 // 把上一个点设为false
 pointGroup.getChildAt(lastPosition).setEnabled(false);
 lastPosition = position;
 }

 @Override
 public void onPageScrollStateChanged(int state) {

 }
}

fragment_index.xml

index_header.xml

CampaignListAdapter.java

package com.czhappy.commonindexdemo.adapter;

import android.content.Context;
import android.support.v7.widget.CardView;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.czhappy.commonindexdemo.R;
import com.czhappy.commonindexdemo.glide.GlideImgManager;
import com.czhappy.commonindexdemo.model.Campaign;
import com.czhappy.commonindexdemo.model.CampaignImage;
import com.czhappy.commonindexdemo.utils.ToastUtil;
import com.czhappy.commonindexdemo.utils.Utils;
import com.lzy.ninegrid.ImageInfo;
import com.lzy.ninegrid.NineGridView;
import com.lzy.ninegrid.preview.NineGridViewClickAdapter;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;



public class CampaignListAdapter extends ListbaseAdapter {

 private Context mContext;

 @BindView(R.id.user_head_iv)
 ImageView userHeadIv;
 @BindView(R.id.username_tv)
 TextView usernameTv;
 @BindView(R.id.createtime_tv)
 TextView createtimeTv;
 @BindView(R.id.status_tv)
 TextView statusTv;
 @BindView(R.id.title_tv)
 TextView titleTv;
 @BindView(R.id.desc_tv)
 TextView descTv;
 @BindView(R.id.campaign_time_tv)
 TextView campaignTimeTv;
 @BindView(R.id.prise_iv)
 ImageView priseIv;
 @BindView(R.id.prise_count_tv)
 TextView priseCountTv;
 @BindView(R.id.comment_count_tv)
 TextView commentCountTv;
 @BindView(R.id.nineGrid)
 NineGridView nineGrid;
 @BindView(R.id.address_tv)
 TextView addressTv;
 @BindView(R.id.cardView)
 CardView cardView;
 @BindView(R.id.layout_address)
 LinearLayout layoutAddress;

 public CampaignListAdapter(Context context) {
 super(context);
 this.mContext = context;
 }

 @Override
 public int getLayoutId() {
 return R.layout.campaign_list_item;
 }

 @Override
 public void onBindItemHolder(SuperViewHolder holder, int position) {
 ButterKnife.bind(this, holder.itemView);
 final Campaign campaign = mDataList.get(position);

 if(!Utils.isEmpty(campaign.getStart_time()) && Utils.isEmpty(campaign.getEnd_time())){
  campaignTimeTv.setText("自"+Utils.StringDateFormat(campaign.getStart_time(), "yyyy-MM-dd HH:mm") + "起");
 }else{
  campaignTimeTv.setText(Utils.StringDateFormat(campaign.getStart_time(), "yyyy-MM-dd HH:mm") + "至" + Utils.StringDateFormat(campaign.getEnd_time(), "yyyy-MM-dd HH:mm"));
 }

 commentCountTv.setText(campaign.getComment_count());
 createtimeTv.setText(campaign.getCreate_time());
 descTv.setText(campaign.getCampaign_desc());
 priseCountTv.setText(campaign.getPraise_count());
 usernameTv.setText(campaign.getNickname());
 if(!Utils.isEmpty(campaign.getCampaign_address())){
  layoutAddress.setVisibility(View.VISIBLE);
  addressTv.setText(campaign.getCampaign_address());
 }else{
  layoutAddress.setVisibility(View.GONE);
 }

 if ("1".equals(campaign.getIs_praise())) {
  priseIv.setImageResource(R.mipmap.ding_checked_icon);
 } else {
  priseIv.setImageResource(R.mipmap.ding_uncheck_icon);
 }

 String statusStr = Utils.checkTimeStatus(campaign.getStart_time(), campaign.getEnd_time());
 statusTv.setText(statusStr);
 if ("未开始".equals(statusStr)) {
  statusTv.setTextColor(mContext.getResources().getColor(R.color.blue));
 } else if ("进行中".equals(statusStr)) {
  statusTv.setTextColor(mContext.getResources().getColor(R.color.red));
 } else if ("已结束".equals(statusStr)) {
  statusTv.setTextColor(mContext.getResources().getColor(R.color.common_gray9));
 }

 titleTv.setText(campaign.getCampaign_name());

 GlideImgManager.loadCircleImage(mContext, campaign.getHead_img(), userHeadIv);
 ArrayList imageInfo = new ArrayList<>();
 List images = campaign.getImg_list();
 if (images != null) {
  for (CampaignImage image : images) {
  ImageInfo info = new ImageInfo();
  info.setThumbnailUrl(image.getImage_url());
  info.setBigImageUrl(image.getImage_url());
  imageInfo.add(info);
  }
 }
 nineGrid.setAdapter(new NineGridViewClickAdapter(mContext, imageInfo));

 if (images != null && images.size() == 1) {
  //nineGrid.setSingleImageRatio(images.get(0).getWidth() * 1.0f / images.get(0).getHeight());
 }

 cardView.setonClickListener(new View.onClickListener() {
  @Override
  public void onClick(View v) {
  ToastUtil.show(mContext, campaign.getCampaign_name());
  }
 });
 }
}

campaign_list_item.java

四、源码下载

http://xiazai.jb51.net/201701/yuanma/AndroidAPPDemo(jb51.net).rar

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。