banner轮播、

其他 2018-12-18 12:01:49 阅读次数: 0

导入依赖 dependencies{
implementation ‘com.youth.banner:banner:1.4.10’
}

main_activity

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns: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”
tools:context=".MainActivity">

<com.youth.banner.Banner
    android:id="@+id/banner"
    android:layout_width="0dp"
    android:layout_height="200dp"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:indicator_width="8dp"
    app:indicator_height="8dp"
    app:indicator_drawable_selected="@drawable/shape_sel_dot"
    app:indicator_drawable_unselected="@drawable/shape_normal_dot"
    />
<me.maxwin.view.XListView
    android:id="@+id/xListView"
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toBottomOf="@id/banner"
    app:layout_constraintBottom_toBottomOf="parent"
    />

</android.support.constraint.ConstraintLayout>

image_item

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns:android=“http://schemas.android.com/apk/res/android”
android:layout_width=“match_parent”
android:layout_height=“wrap_content”
android:padding=“10dp”
xmlns:app=“http://schemas.android.com/apk/res-auto”>

<ImageView
    android:id="@+id/image"
    android:layout_width="160dp"
    android:layout_height="100dp"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"/>
<TextView
    android:id="@+id/news_title"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintLeft_toRightOf="@id/image"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintBottom_toTopOf="@id/news_summary"/>
<TextView
    android:id="@+id/news_summary"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toRightOf="@id/image"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toBottomOf="@id/news_title"
    android:layout_marginTop="30dp"/>

</android.support.constraint.ConstraintLayout>

text_item

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns:android=“http://schemas.android.com/apk/res/android”
android:layout_width=“match_parent”
android:layout_height=“wrap_content”
android:padding=“10dp”
xmlns:app=“http://schemas.android.com/apk/res-auto”>

<TextView
    android:id="@+id/news_title"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintBottom_toTopOf="@id/news_summary"/>
<TextView
    android:id="@+id/news_summary"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toBottomOf="@id/news_title"
    android:layout_marginTop="30dp"/>

</android.support.constraint.ConstraintLayout>

MainActivity

package com.example.text_one;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

import com.youth.banner.Banner;
import com.youth.banner.BannerConfig;
import com.youth.banner.loader.ImageLoader;
import com.youth.banner.loader.ImageLoaderInterface;

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

import me.maxwin.view.XListView;

public class MainActivity extends AppCompatActivity {

private Banner banner;
private XListView xListView;
private int mPage;
private RecommendBaseAdapter baseAdapter;

private String urlStr="http://api.expoon.com/AppNews/getNewsList/type/1/p/%d";
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    banner=findViewById(R.id.banner);
    xListView=findViewById(R.id.xListView);
    mPage=1;
    baseAdapter=new RecommendBaseAdapter(MainActivity.this);
    xListView.setAdapter(baseAdapter);
    xListView.setPullLoadEnable(true);
    xListView.setPullRefreshEnable(true);
    xListView.setXListViewListener(new XListView.IXListViewListener() {
        @Override
        public void onRefresh() {
            mPage=1;
            loadData();
        }

        @Override
        public void onLoadMore() {
            mPage++;
            loadData();
        }

    });
    //设置banner样式
    banner.setBannerStyle(BannerConfig.CIRCLE_INDICATOR_TITLE_INSIDE);
    //设置图片加载器
    banner.setImageLoader(new ImageLoaderInterface<ImageView>() {
        @Override
        public void displayImage(Context context, Object path, ImageView imageView) {
            BannerBean.Banner banner= (BannerBean.Banner) path;
            com.nostra13.universalimageloader.core.ImageLoader.getInstance()
                    .displayImage(banner.getPicUrl(),imageView);
        }

        @Override
        public ImageView createImageView(Context context) {
            ImageView imageView=new ImageView(context);
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            return null;
        }
    });
    initData();
    loadData();
}

private void loadData() {
    NetUtils.getInsanner().Requery(String.format(urlStr, mPage), UserBean.class, new NetUtils.CallBack<UserBean>() {
        @Override
        public void indatas(UserBean o) {
            if (mPage==1){
                baseAdapter.setdata(o.getData());
            }else{
                baseAdapter.adddata(o.getData());
            }
            xListView.stopRefresh();
            xListView.stopLoadMore();
        }
    });
}

private void initData() {
    NetUtils.getInsanner().Requery("https://api.tianapi.com/wxnew/?key=c4aa776e0a51d57d6750511e2baa46b6&num=6&page=1", BannerBean.class, new NetUtils.CallBack<BannerBean>() {
        @Override
        public void indatas(BannerBean o) {
            //设置图片集合
            banner.setImages(o.getNewslist());
            banner.setBannerTitles(getTitles(o));
            //banner设置方法全部调用完毕时最后调用
            banner.start();
        }
    });
}

private List<String> getTitles(BannerBean o) {

    List<String> result=new ArrayList<>();
    for (BannerBean.Banner banner:o.getNewslist()) {
        result.add(banner.getTitle());
    }
    return result;
}

}

NetUtils

package com.example.text_one;

import android.annotation.SuppressLint;
import android.os.AsyncTask;

import com.google.gson.Gson;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class NetUtils {
private static NetUtils insanner;
private Gson gson;
public NetUtils() {
gson=new Gson();
}

public static NetUtils getInsanner() {
    if(insanner==null){
        insanner=new NetUtils();
    }
    return insanner;
}



public  interface  CallBack<T>{
    void indatas(T t);
}
@SuppressLint("StaticFieldLeak")
public  void  Requery(String urldata, final Class clazz, final CallBack callBack){
    new AsyncTask<String,Void,Object>(){
        @Override
        protected Object doInBackground(String... strings) {
            return Requery(strings[0],clazz);
        }

        @Override
        protected void onPostExecute(Object o) {
            callBack.indatas(o);
        }
    }.execute(urldata);
}
public  <E> E Requery(String uridata,Class clazz){
    return (E) gson.fromJson(Requery(uridata),clazz);
}

public String Requery(String uridata){
    String getstram="";
    try {
        URL url = new URL(uridata);
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestMethod("GET");
        urlConnection.setConnectTimeout(5000);
        urlConnection.setReadTimeout(5000);
        int responseCode = urlConnection.getResponseCode();
        if (responseCode==200){
            getstram = getstram(urlConnection.getInputStream());
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
    return getstram;
}

private String getstram(InputStream inputStream) throws IOException {
    StringBuilder builder = new StringBuilder();
    BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
    for (String tmp =br.readLine();tmp!=null;tmp=br.readLine()){
        builder.append(tmp);
    }
    return builder.toString();
}

}

适配器

package com.example.text_one;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;

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

public class RecommendBaseAdapter extends BaseAdapter {
private static final int ITEM_COUNT = 2;
private static final int TEAT_ITEM = 0;
private static final int DATA_ITEM = 1;
private Context context;
private List<UserBean.DataBean> list;

public RecommendBaseAdapter(Context context){
    this.context=context;
    list=new ArrayList<>();
}

public void setdata(List<UserBean.DataBean> data) {
    list.clear();
    if (data!=null){
        list.addAll(data);
    }
    notifyDataSetChanged();
}
public void adddata(List<UserBean.DataBean> data){
    if (data!=null){
        list.addAll(data);
    }
    notifyDataSetChanged();
}

@Override
public int getViewTypeCount() {
    return ITEM_COUNT;
}

@Override
public int getItemViewType(int position) {
    return position%2==0?TEAT_ITEM:DATA_ITEM;
}
@Override
public int getCount() {
    return list.size();
}

@Override
public UserBean.DataBean getItem(int position) {
    return list.get(position);
}

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView==null){
        convertView=LayoutInflater.from(context).inflate(
                getItemViewType(position)==TEAT_ITEM?R.layout.text_item:R.layout.image_item,parent,false
        );
        holder=new ViewHolder(convertView);
    }else {
        holder= (ViewHolder) convertView.getTag();
    }
    holder.bindData(getItem(position));
    return convertView;
}
class ViewHolder{
    TextView news_title;
    TextView news_summary;
    ImageView imageView;

    public ViewHolder(View convertView) {
        news_title=convertView.findViewById(R.id.news_title);
        news_summary=convertView.findViewById(R.id.news_summary);
        imageView=convertView.findViewById(R.id.image);
        convertView.setTag(this);
    }

    public void bindData(UserBean.DataBean item) {
        news_title.setText(item.getNews_title());
        news_summary.setText(item.getNews_summary());
        if (imageView!=null){
            DisplayImageOptions options=new DisplayImageOptions.Builder()
                    .cacheOnDisk(true)
                    .cacheInMemory(true)
                    .showImageForEmptyUri(R.mipmap.ic_launcher)
                    .showImageOnFail(R.mipmap.ic_launcher)
                    .showImageOnLoading(R.mipmap.ic_launcher)
                    .build();
            ImageLoader.getInstance().displayImage(item.getPic_url(),imageView,options);
        }
    }
}

}

全局App

package com.example.shaopenglai;

import android.app.Application;
import android.graphics.Bitmap;

import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;

public class App extends Application {
@Override
public void onCreate() {
super.onCreate();
ImageLoader.getInstance().init(
new ImageLoaderConfiguration.Builder(this)
.diskCacheSize(5010241024)
.memoryCacheSizePercentage(13)
.defaultDisplayImageOptions(
new DisplayImageOptions.Builder()
.cacheInMemory(true)
.cacheOnDisk(true)
.bitmapConfig(Bitmap.Config.RGB_565)
.showImageForEmptyUri(R.mipmap.ic_launcher)
.showImageOnFail(R.mipmap.ic_launcher)
.showImageOnLoading(R.mipmap.ic_launcher)
.displayer(new RoundedBitmapDisplayer(16))
.build()
)
.build()
);
}
}

BannerBean

package com.example.text_one;

import java.util.List;

public class BannerBean {
private int code;
private String msg;
private List newslist;
private final int SUCCESS_CODE = 200;

public boolean isSuccess(){
    return code==SUCCESS_CODE;
}

public int getCode() {
    return code;
}

public String getMsg() {
    return msg;
}

public List<Banner> getNewslist() {
    return newslist;
}

public class Banner{
    private String title;
    private String picUrl;

    public String getTitle() {
        return title;
    }

    public String getPicUrl() {
        return picUrl;
    }
}

}

UserBean

package com.example.text_one;

import java.util.List;

public class UserBean {

private int status;
private String info;
private List<DataBean> data;

public int getStatus() {
    return status;
}

public void setStatus(int status) {
    this.status = status;
}

public String getInfo() {
    return info;
}

public void setInfo(String info) {
    this.info = info;
}

public List<DataBean> getData() {
    return data;
}

public void setData(List<DataBean> data) {
    this.data = data;
}

public static class DataBean {

    private String news_id;
    private String news_title;
    private String news_summary;
    private String pic_url;

    public String getNews_id() {
        return news_id;
    }

    public void setNews_id(String news_id) {
        this.news_id = news_id;
    }

    public String getNews_title() {
        return news_title;
    }

    public void setNews_title(String news_title) {
        this.news_title = news_title;
    }

    public String getNews_summary() {
        return news_summary;
    }

    public void setNews_summary(String news_summary) {
        this.news_summary = news_summary;
    }

    public String getPic_url() {
        return pic_url;
    }

    public void setPic_url(String pic_url) {
        this.pic_url = pic_url;
    }
}

}

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