XRecyclerView多条目展示以及上拉刷新下拉加载
1.主页面布局Main
2.主页面代码MainActivity
package com.bawie.recy1;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.Toast;
import com.bawie.recy1.adapter.NewsAdapter;
import com.bawie.recy1.bean.News;
import com.bawie.recy1.utils.OkHttpUtils;
import com.google.gson.Gson;
import com.jcodecraeer.xrecyclerview.XRecyclerView;
import java.util.List;
/**
* 1.导入依赖 初始化控件 加入网络权限
* 2.封装网络请求OkHttpUtils 使用网络请求 封装bean
* 3.布局管理器 Gson解析
* 4.创建Adapter
*/
public class MainActivity extends AppCompatActivity {
public static final String url = "http://www.xieast.com/api/news/news.php";
private XRecyclerView recyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//找控件
initView();
//
initData();
//上拉加载下拉刷新
initRefresh();
}
/**
* 刷新
* //上拉加载下拉刷新
*/
private void initRefresh() {
recyclerView.setLoadingListener(new XRecyclerView.LoadingListener() {
@Override
public void onRefresh() {
//更新UI
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
recyclerView.refreshComplete();
Toast.makeText(MainActivity.this, "刷新完成", Toast.LENGTH_SHORT).show();
}
},2000);
}
@Override
public void onLoadMore() {
//更新UI
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
recyclerView.loadMoreComplete();
Toast.makeText(MainActivity.this, "加载完成", Toast.LENGTH_SHORT).show();
}
},2000);
}
});
}
private void initData() {
OkHttpUtils instance = OkHttpUtils.getInstance();
instance.doGet(url, new OkHttpUtils.OkHttpUtilsInterface() {
@Override
public void success(String json) {
//创建布局管理器
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(MainActivity.this);
recyclerView.setLayoutManager(linearLayoutManager);
//Gson解析
News news = new Gson().fromJson(json, News.class);
List data = news.getData();
//创建Adapter
NewsAdapter newsAdapter = new NewsAdapter(data, MainActivity.this);
recyclerView.setAdapter(newsAdapter);
}
@Override
public void failed() {
}
});
}
private void initView() {
recyclerView = (XRecyclerView) findViewById(R.id.recyclerView);
}
}
3.Adapter
package com.bawie.recy1.adapter;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import com.bawie.recy1.R;
import com.bawie.recy1.base.BaseJilei;
import com.bawie.recy1.bean.News;
import com.bawie.recy1.type.TypeOne;
import com.bawie.recy1.type.TypeThree;
import com.bawie.recy1.type.TypeTwo;
import java.util.List;
/**
* date:2018/12/1
* author:别来无恙(别来无恙)
* function:
* 1.写入上下文 以及list集合 写入有参构造
* 2.实现他的方法
* 3.写一个基类
* 4.在onBindViewHolder把viewHolder转换成BaseJilei的类型,获取他手写的方法传入list集合
* 5.创建一个getItemViewType方法 判断图片
* 6.在onCreateViewHolder 判断下标是否和对应的TYPE相同
* a.创建新的对应的布局 继承基类 实现他的两个方法 写入他们的布局
* b.Fresco的初始化
*
*/
public class NewsAdapter extends RecyclerView.Adapter {
private List list;
private Context mContext;
public static final int TYPE_ONE = 1;
public static final int TYPE_TWO = 2;
public static final int TYPE_THREE = 3;
public NewsAdapter(List list, Context context) {
this.list = list;
mContext = context;
}
@Override
public int getItemViewType(int position) {
News.DataBean dataBean = list.get(position);
if (dataBean.getThumbnail_pic_s() != null && dataBean.getThumbnail_pic_s02() == null && dataBean.getThumbnail_pic_s03() == null){
//如果存在一张图片 返回1
return TYPE_ONE;
}else if (dataBean.getThumbnail_pic_s() != null && dataBean.getThumbnail_pic_s02() != null && dataBean.getThumbnail_pic_s03() != null){
//如果存在三张图片 返回3
return TYPE_THREE;
}else {
//最后一个结果是 只存在两张图片 返回2
return TYPE_TWO;
}
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
if (i == TYPE_ONE){
//布局1张图片
return new TypeOne(View.inflate(mContext,R.layout.item_news1,null));
}else if (i == TYPE_TWO){
//布局2张图片
return new TypeTwo(View.inflate(mContext,R.layout.item_news2,null));
}else{
//布局3张图片
return new TypeThree(View.inflate(mContext,R.layout.item_news3,null));
}
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
((BaseJilei)viewHolder).JileiAbstract(list.get(i));
}
@Override
public int getItemCount() {
return list.size();
}
}
4.工具类Utils
package com.bawie.recy1.utils;
import android.os.Handler;
import android.os.Looper;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
/**
* date:2018/12/1
* author:别来无恙(别来无恙)
* function:
*/
public class OkHttpUtils {
private final Handler mHandler;
private final OkHttpClient mOkHttpClient;
private static OkHttpUtils sOkHttpUtils;
private OkHttpUtils(){
mHandler = new Handler(Looper.getMainLooper());
mOkHttpClient = new OkHttpClient.Builder()
.writeTimeout(3000, TimeUnit.MILLISECONDS)
.readTimeout(3000, TimeUnit.MILLISECONDS)
.connectTimeout(3000, TimeUnit.MILLISECONDS)
.build();
}
public static OkHttpUtils getInstance(){
if (sOkHttpUtils == null){
synchronized (OkHttpUtils.class){
if (sOkHttpUtils == null){
return sOkHttpUtils = new OkHttpUtils();
}
}
}
return sOkHttpUtils;
}
public interface OkHttpUtilsInterface{
void success(String json);
void failed();
}
public void doGet(String url, final OkHttpUtilsInterface okHttpUtilsInterface){
Request request = new Request.Builder()
.url(url)
.build();
Call call = mOkHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
mHandler.post(new Runnable() {
@Override
public void run() {
okHttpUtilsInterface.failed();
}
});
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final String json = response.body().string();
mHandler.post(new Runnable() {
@Override
public void run() {
okHttpUtilsInterface.success(json);
}
});
}
});
}
}
5.基类
package com.bawie.recy1.base;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import com.bawie.recy1.bean.News;
/**
* date:2018/12/1
* author:别来无恙(别来无恙)
* function:
* 1.抽象的方法
* 2.继承RecyclerView.ViewHolder 并且实现他的方法
* 3.手写一个抽象的没有返回值的方法
*
*/
public abstract class BaseJilei extends RecyclerView.ViewHolder {
public abstract void JileiAbstract(News.DataBean list);
public BaseJilei(@NonNull View itemView) {
super(itemView);
}
}
6.基类的三个孩子----
TypeOne
package com.bawie.recy1.type;
import android.support.annotation.NonNull;
import android.view.View;
import com.bawie.recy1.R;
import com.bawie.recy1.base.BaseJilei;
import com.bawie.recy1.bean.News;
import com.facebook.drawee.view.SimpleDraweeView;
/**
* date:2018/12/1
* author:别来无恙(别来无恙)
* function:
*/
public class TypeOne extends BaseJilei {
private final SimpleDraweeView mItem_image_one;
public TypeOne(@NonNull View itemView) {
super(itemView);
//找控件
mItem_image_one = itemView.findViewById(R.id.item_image_one);
}
@Override
public void JileiAbstract(News.DataBean list) {
mItem_image_one.setImageURI(list.getThumbnail_pic_s());
}
}
TypeTwo
package com.bawie.recy1.type;
import android.support.annotation.NonNull;
import android.view.View;
import android.widget.TextView;
import com.bawie.recy1.R;
import com.bawie.recy1.base.BaseJilei;
import com.bawie.recy1.bean.News;
import com.facebook.drawee.view.SimpleDraweeView;
/**
* date:2018/12/1
* author:别来无恙(别来无恙)
* function:
*/
public class TypeTwo extends BaseJilei {
private final SimpleDraweeView mItem_image_one;
private final SimpleDraweeView mItem_image_two;
private final TextView mItem_textview_title;
private final TextView mItem_textview_data;
public TypeTwo(@NonNull View itemView) {
super(itemView);
//找控件
mItem_image_one = itemView.findViewById(R.id.item_image_one);
mItem_image_two = itemView.findViewById(R.id.item_image_two);
mItem_textview_title = itemView.findViewById(R.id.item_textview_title);
mItem_textview_data = itemView.findViewById(R.id.item_textview_data);
}
@Override
public void JileiAbstract(News.DataBean list) {
mItem_image_one.setImageURI(list.getThumbnail_pic_s());
mItem_image_two.setImageURI(list.getThumbnail_pic_s02());
mItem_textview_title.setText(list.getTitle());
mItem_textview_data.setText(list.getDate());
}
}
TypeThree
package com.bawie.recy1.type;
import android.support.annotation.NonNull;
import android.view.View;
import android.widget.TextView;
import com.bawie.recy1.R;
import com.bawie.recy1.base.BaseJilei;
import com.bawie.recy1.bean.News;
import com.facebook.drawee.view.SimpleDraweeView;
/**
* date:2018/12/1
* author:别来无恙(别来无恙)
* function:
*/
public class TypeThree extends BaseJilei {
private final SimpleDraweeView mItem_image_one;
private final SimpleDraweeView mItem_image_two;
private final SimpleDraweeView mItem_image_three;
private final TextView mItem_textview_title;
private final TextView mItem_textview_data;
public TypeThree(@NonNull View itemView) {
super(itemView);
//找控件
mItem_image_one = itemView.findViewById(R.id.item_image_one);
mItem_image_two = itemView.findViewById(R.id.item_image_two);
mItem_image_three = itemView.findViewById(R.id.item_image_three);
mItem_textview_title = itemView.findViewById(R.id.item_textview_title);
mItem_textview_data = itemView.findViewById(R.id.item_textview_data);
}
@Override
public void JileiAbstract(News.DataBean list) {
mItem_image_one.setImageURI(list.getThumbnail_pic_s());
mItem_image_two.setImageURI(list.getThumbnail_pic_s02());
mItem_image_three.setImageURI(list.getThumbnail_pic_s03());
mItem_textview_title.setText(list.getTitle());
mItem_textview_data.setText(list.getDate());
}
}
7.全局初始化
public void onCreate() {
super.onCreate();
Fresco.initialize(this);
}
8.三个条目的布局
news1
news2
news3
注意:
/*okHttp*/
implementation 'com.squareup.okhttp3:okhttp:3.12.0'
/*recyclerview*/
implementation 'com.android.support:recyclerview-v7:28.0.0'
/*gson解析*/
implementation 'com.google.code.gson:gson:2.2.4'
/*fresco*/
implementation 'com.facebook.fresco:fresco:1.11.0'
/*xrecyclerview*/
implementation 'com.jcodecraeer:xrecyclerview:1.2.0'
加入网络权限