说明：最近碰到一个需求，弄一个新闻列表和轮播图，在首页显示，并且需要json解析，图片下载，轮播图和新闻列表一起滑动

ui效果图：

文件说明：
step1:引用依赖包 图片下载 json解析 轮播图 ~app\build.gradle
step2:清单文件，注册联网权限 ~\app\src\main\AndroidManifest.xml
step3:主界面ui布局~\app\src\main\res\layout\activity_main.xml
step4:本地模拟字符串 ~\app\src\main\assets\stu.json
step5:recycleview item的子布局 ~\app\src\main\res\layout\item2.xml
step6:recycleview适配器 ~\app\src\main\java\com\example\iosdialogdemo\LanguageRecycleAdapter2.java
step7:recycleview 控件管理器 ~\app\src\main\java\com\example\iosdialogdemo\LanguageViewHolder2.java
step8: 主界面功能 ~\app\src\main\java\com\example\iosdialogdemo\MainActivity.java
step9:glide图片下载管理类 ~\app\src\main\java\com\example\iosdialogdemo\MyImageLoader.java
step10: json的bean类 ~\app\src\main\java\com\example\iosdialogdemo\StuBean.java

step1:~app\build.gradle

    implementation "com.github.bumptech.glide:glide:4.6.1"implementation 'com.google.code.gson:gson:2.8.0'implementation 'com.github.bumptech.glide:glide:4.8.0'

step2: ~\app\src\main\AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.example.iosdialogdemo"><uses-permission android:name="android.permission.INTERNET" /><applicationandroid:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:roundIcon="@mipmap/ic_launcher_round"android:supportsRtl="true"android:theme="@style/Theme.IosDialogDemo"><activity android:name=".MainActivity"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application></manifest>

step3:~\app\src\main\res\layout\activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"><com.google.android.material.appbar.AppBarLayoutandroid:id="@+id/app_bar"android:layout_width="match_parent"android:layout_height="wrap_content"app:elevation="0dp"><LinearLayoutandroid:id="@+id/toolbar_layout"android:layout_width="match_parent"android:layout_height="match_parent"app:layout_scrollFlags="scroll|exitUntilCollapsed"><com.youth.banner.Bannerandroid:id="@+id/banner"android:layout_width="match_parent"android:layout_height="200dp"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintTop_toTopOf="parent" /></LinearLayout></com.google.android.material.appbar.AppBarLayout><androidx.recyclerview.widget.RecyclerViewandroid:id="@+id/rvLanguage2"android:layout_width="match_parent"android:layout_height="wrap_content"app:layout_behavior="@string/appbar_scrolling_view_behavior" /></androidx.coordinatorlayout.widget.CoordinatorLayout>

step4:~\app\src\main\assets\stu.json

{"sch_num": 1085,"sch_ready_ed": 2,"sch_ready_ing": 6,"sch_ready_not": 1079,"sch_ready_ing_list": [{"stu_id": 223,"stu_name": "2018-2019学年度第二学期考试和放假时间安排","stu_status": "0","item_status": "2","stu_url": "https://fuss10.elemecdn.com/8/27/f01c15bb73e1ef3793e64e6b7bbccjpeg.jpeg","stu_sex": "女","stu_birth": "1985-04-17","stu_addr": "四川成都","col_id": 3,"grade_id": null,"col_name": "学院","grade_name": "校级"},{"stu_id": 255,"stu_name": "2018-2019学年度第二学期考试和放假时间安排","stu_status": "0","item_status": "2","stu_url": "https://fuss10.elemecdn.com/8/27/f01c15bb73e1ef3793e64e6b7bbccjpeg.jpeg","stu_sex": "男","stu_birth": "1993-01-25","stu_addr": null,"col_id": 3,"grade_id": null,"col_name": "学院","grade_name": "校级"},{"stu_id": 435,"stu_name": "2018-2019学年度第二学期考试和放假时间安排","stu_status": "0","item_status": "2","stu_url": "https://fuss10.elemecdn.com/8/27/f01c15bb73e1ef3793e64e6b7bbccjpeg.jpeg","stu_sex": "男","stu_birth": "1988-06-30","stu_addr": null,"col_id": 2,"grade_id": null,"col_name": "学院","grade_name": "校级"},{"stu_id": 572,"stu_name": "2018-2019学年度第二学期考试和放假时间安排","stu_status": "0","item_status": "2","stu_url": "https://fuss10.elemecdn.com/8/27/f01c15bb73e1ef3793e64e6b7bbccjpeg.jpeg","stu_sex": "男","stu_birth": "1993-07-19","stu_addr": "陕西咸阳","col_id": 1,"grade_id": null,"col_name": "学院","grade_name": "校级"},{"stu_id": 954,"stu_name": "2018-2019学年度第二学期考试和放假时间安排","stu_status": "0","item_status": "2","stu_url": "https://fuss10.elemecdn.com/8/27/f01c15bb73e1ef3793e64e6b7bbccjpeg.jpeg","stu_sex": "女","stu_birth": "2001-09-20","stu_addr": "新疆喀什","col_id": 5,"grade_id": null,"col_name": "学院","grade_name": "校级"},{"stu_id": 5035,"stu_name": "2018-2019学年度第二学期考试和放假时间安排","stu_status": "0","item_status": "0","stu_url": "https://fuss10.elemecdn.com/8/27/f01c15bb73e1ef3793e64e6b7bbccjpeg.jpeg","stu_sex": "男","stu_birth": "1988-06-30","stu_addr": "福建莆田","col_id": 2,"grade_id": null,"col_name": "学院","grade_name": "校级"}]
}

step5:~\app\src\main\res\layout\item2.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_margin="5dp"><TextViewandroid:id="@+id/tv_news_title"android:layout_width="wrap_content"android:layout_height="70dp"android:layout_marginLeft="15dp"android:layout_marginTop="20dp"android:layout_alignParentStart="true"android:layout_toLeftOf="@+id/iv_news"android:text="2018-2019学年度第二学期考试和放假时间安排"android:textColor="@android:color/black"android:textSize="18sp" /><TextViewandroid:id="@+id/tv_news_mark"android:layout_width="40dp"android:layout_height="20dp"android:gravity="center"android:layout_below="@+id/tv_news_title"android:layout_marginLeft="20dp"android:layout_marginTop="10dp"android:textSize="12sp"android:textColor="@color/purple_200"android:text="校级" /><TextViewandroid:layout_width="wrap_content"android:layout_height="20dp"android:gravity="center"android:layout_below="@+id/tv_news_title"android:layout_marginTop="10dp"android:layout_toRightOf="@+id/tv_news_mark"android:layout_marginLeft="20dp"android:text="12-08" /><ImageViewandroid:id="@+id/iv_news"android:layout_width="200dp"android:layout_height="100dp"android:layout_alignParentRight="true"android:layout_centerVertical="true"android:layout_marginTop="20dp"android:layout_marginRight="15dp"android:layout_marginBottom="20dp"android:scaleType="fitXY"android:src="@mipmap/ic_launcher" />
</RelativeLayout>

step6:~\app\src\main\java\com\example\iosdialogdemo\LanguageRecycleAdapter2.java

package com.example.iosdialogdemo;import com.bumptech.glide.Glide;
import com.example.iosdialogdemo.R;import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;import java.util.List;public class LanguageRecycleAdapter2 extends RecyclerView.Adapter<LanguageViewHolder2> {private List<StuBean.SchReadyIngListBean> stuList;private Context context;public LanguageRecycleAdapter2(Context context, List<StuBean.SchReadyIngListBean> stuList) {this.stuList = stuList;this.context = context;}public void setData(List<StuBean.SchReadyIngListBean> stuList) {this.stuList = stuList;}@NonNull@Overridepublic LanguageViewHolder2 onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {LanguageViewHolder2 holder;View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item2, parent, false);holder = new LanguageViewHolder2(view);return holder;}@Overridepublic void onBindViewHolder(@NonNull LanguageViewHolder2 holder, final int position) {holder.tv_stu_name.setText(stuList.get(position).getStu_name());holder.tv_stu_cls.setText(stuList.get(position).getGrade_name());Glide.with(context).load(stuList.get(position).getStu_url()).into(holder.iv_img);}@Overridepublic int getItemCount() {return stuList.size();}}

step7:~\app\src\main\java\com\example\iosdialogdemo\LanguageViewHolder2.java

package com.example.iosdialogdemo;import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;import com.example.iosdialogdemo.R;public class LanguageViewHolder2 extends RecyclerView.ViewHolder {public TextView tv_stu_name, tv_stu_cls;public ImageView iv_img;public LanguageViewHolder2(@NonNull View itemView) {super(itemView);tv_stu_name = itemView.findViewById(R.id.tv_news_title);tv_stu_cls = itemView.findViewById(R.id.tv_news_mark);iv_img = itemView.findViewById(R.id.iv_news);}
}

step8: ~\app\src\main\java\com\example\iosdialogdemo\MainActivity.java

package com.example.iosdialogdemo;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import com.google.gson.Gson;import com.youth.banner.Banner;import com.youth.banner.BannerConfig;import com.youth.banner.Transformer;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import androidx.annotation.NonNull;import androidx.appcompat.app.AppCompatActivity;import androidx.recyclerview.widget.LinearLayoutManager;import androidx.recyclerview.widget.RecyclerView;public class MainActivity extends AppCompatActivity {//界面控件private Banner mbanner;//轮播图的数据private MyImageLoader myImageLoader;private ArrayList<Integer> photos;/*新闻列表*/private List<StuBean.SchReadyIngListBean> stuList;private RecyclerView rvLanguage2 ;private String jsonString;private LanguageRecycleAdapter2 languageRecycleAdapter2;private Handler mHandler = new Handler(new Handler.Callback() {@Overridepublic boolean handleMessage(@NonNull Message message) {if (message.what == 100) {jsonString = (String) message.obj;Log.e("INFO", "##### Sub: " + ": " + jsonString);Gson gson = new Gson();//解析字符串StuBean mStuBean = gson.fromJson(jsonString, StuBean.class);if (stuList != null) {stuList.clear();}stuList.addAll(mStuBean.getSch_ready_ing_list());Log.e("INFO", "##### Sub: " + ": " + stuList);languageRecycleAdapter2.setData(stuList);languageRecycleAdapter2.notifyDataSetChanged();}return false;}});@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initData();initView();}//界面初始化private void initView() {mbanner = (Banner) findViewById(R.id.banner);//设置轮播的样式mbanner.setBannerStyle(BannerConfig.CIRCLE_INDICATOR);  //CIRCLE_INDICATOR//设置图片加载器mbanner.setImageLoader(myImageLoader);//设置轮播的动画效果,里面有很多种特效,可以都看看效果。mbanner.setBannerAnimation(Transformer.ZoomOutSlide);//设置轮播间隔时间mbanner.setDelayTime(3000);//设置是否为自动轮播，默认是truembanner.isAutoPlay(true);//设置指示器的位置，小点点，居中显示mbanner.setIndicatorGravity(BannerConfig.CENTER);//设置图片加载地址mbanner.setImages(photos)//开始调用的方法，启动轮播图。.start();rvLanguage2 = findViewById(R.id.rvLanguage2);stuList = new ArrayList<>();rvLanguage2.setLayoutManager(new LinearLayoutManager(MainActivity.this));languageRecycleAdapter2 = new LanguageRecycleAdapter2(MainActivity.this, stuList);rvLanguage2.setAdapter(languageRecycleAdapter2);loadJsonFromAssests();}//数据初始化private void initData() {myImageLoader = new MyImageLoader();//将轮播的图片放在photos 那里photos = new ArrayList<Integer>();photos.add(R.mipmap.ic_launcher);photos.add(R.mipmap.ic_launcher);photos.add(R.mipmap.ic_launcher);photos.add(R.mipmap.ic_launcher);photos.add(R.mipmap.ic_launcher);photos.add(R.mipmap.ic_launcher);}public void loadJsonFromAssests() {String json = null;try {InputStream inputStream = getAssets().open("stu.json");int size = inputStream.available();byte[] buffer = new byte[size];inputStream.read(buffer);inputStream.close();json = new String(buffer, "UTF-8");} catch (IOException ex) {ex.printStackTrace();}Log.e("TAG", "loadJsonFromAssests:" + json.toString());Message msg = new Message();msg.what = 100;msg.obj = json.toString();mHandler.sendMessage(msg);}}

step9:~\app\src\main\java\com\example\iosdialogdemo\MyImageLoader.java

package com.example.iosdialogdemo;import android.content.Context;import android.widget.ImageView;import com.bumptech.glide.Glide;import com.youth.banner.loader.ImageLoader;public class MyImageLoader extends ImageLoader {@Overridepublic void displayImage(Context context, Object path, ImageView imageView) {Glide.with(context.getApplicationContext()).load(path).into(imageView);}
}

step10:~\app\src\main\java\com\example\iosdialogdemo\StuBean.java

package com.example.iosdialogdemo;import java.util.List;public class StuBean {private int sch_num;private int sch_ready_ed;private int sch_ready_ing;private int sch_ready_not;private List<SchReadyIngListBean> sch_ready_ing_list;public int getSch_num() {return sch_num;}public void setSch_num(int sch_num) {this.sch_num = sch_num;}public int getSch_ready_ed() {return sch_ready_ed;}public void setSch_ready_ed(int sch_ready_ed) {this.sch_ready_ed = sch_ready_ed;}public int getSch_ready_ing() {return sch_ready_ing;}public void setSch_ready_ing(int sch_ready_ing) {this.sch_ready_ing = sch_ready_ing;}public int getSch_ready_not() {return sch_ready_not;}public void setSch_ready_not(int sch_ready_not) {this.sch_ready_not = sch_ready_not;}public List<SchReadyIngListBean> getSch_ready_ing_list() {return sch_ready_ing_list;}public void setSch_ready_ing_list(List<SchReadyIngListBean> sch_ready_ing_list) {this.sch_ready_ing_list = sch_ready_ing_list;}public static class SchReadyIngListBean {private int stu_id;private String stu_name;private String stu_status;private String item_status;private String stu_url;private String stu_sex;private String stu_birth;private String stu_addr;private int col_id;private Object grade_id;private String col_name;private String grade_name;public int getStu_id() {return stu_id;}public void setStu_id(int stu_id) {this.stu_id = stu_id;}public String getStu_name() {return stu_name;}public void setStu_name(String stu_name) {this.stu_name = stu_name;}public String getStu_status() {return stu_status;}public void setStu_status(String stu_status) {this.stu_status = stu_status;}public String getItem_status() {return item_status;}public void setItem_status(String item_status) {this.item_status = item_status;}public String getStu_url() {return stu_url;}public void setStu_url(String stu_url) {this.stu_url = stu_url;}public String getStu_sex() {return stu_sex;}public void setStu_sex(String stu_sex) {this.stu_sex = stu_sex;}public String getStu_birth() {return stu_birth;}public void setStu_birth(String stu_birth) {this.stu_birth = stu_birth;}public String getStu_addr() {return stu_addr;}public void setStu_addr(String stu_addr) {this.stu_addr = stu_addr;}public int getCol_id() {return col_id;}public void setCol_id(int col_id) {this.col_id = col_id;}public Object getGrade_id() {return grade_id;}public void setGrade_id(Object grade_id) {this.grade_id = grade_id;}public String getCol_name() {return col_name;}public void setCol_name(String col_name) {this.col_name = col_name;}public String getGrade_name() {return grade_name;}public void setGrade_name(String grade_name) {this.grade_name = grade_name;}}}