多条目 imageloader

activity

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="zhanghaijiao.bawei.com.week2_kaoshi.MainActivity">

   <ListView
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:id="@+id/lv"></ListView>

</LinearLayout>

item

<?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="match_parent">

    <ImageView
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:id="@+id/img"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv"
        android:layout_toRightOf="@+id/img"/>
</RelativeLayout>

item1

<?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="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv"
       />
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="80dp"
        android:id="@+id/img"
        android:layout_below="@+id/tv"/>

</RelativeLayout>

main_activity

package zhanghaijiao.bawei.com.week2_kaoshi;

import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.reflect.Type;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

import javax.xml.transform.Result;

public class MainActivity extends AppCompatActivity {

    private Handler myHandler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            List<ResultData.ItemBean> data=( List<ResultData.ItemBean>)msg.obj;

            //设置适配器，进行显示
            MyAdapter adapter=new MyAdapter(MainActivity.this,data);
            listView.setAdapter(adapter);


        }
    };
    private ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = findViewById(R.id.lv);

        //进行网络请求
        new Thread(){
            @Override
            public void run() {
                refquestNetData();
            }
        }.start();
    }

    private void refquestNetData() {

        try {
            URL url=new URL("http://api.iclient.ifeng.com/ClientNews?id=YL53,FOCUSYL53&action=default&pullNum=1&uid=864678036850608&devid=864678036850608&proid=ifengnews&vt=5&publishid=6103&screen=1080x1920&df=androidphone&os=android_22&nw=wifi");
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestMethod("GET");
            urlConnection.setConnectTimeout(5000);
            urlConnection.setReadTimeout(5000);

            int code=urlConnection.getResponseCode();
            if(code==200){
                //获取数据
                InputStream inputStream = urlConnection.getInputStream();
                String jsonData=inputstreamToString(inputStream);


                List<ResultData> datas=new ArrayList<ResultData>();

                //得到对应的数据类型type对象
                Type mty=new TypeToken< List<ResultData>>(){}.getType();

                //进行解析
                Gson gson=new Gson();
                datas=gson.fromJson(jsonData,mty);

                //获取列表要显示的数据
                List<ResultData.ItemBean> item = datas.get(0).getItem();

                //给主线程发送消息
                Message msg=Message.obtain();
                msg.obj=item;
                myHandler.sendMessage(msg);
            }




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


    }

    public  String inputstreamToString(InputStream stream){
        StringBuilder builder=new StringBuilder();

        try {
            BufferedReader reader=new BufferedReader(new InputStreamReader(stream));
            String str;
            while ((str=reader.readLine())!=null){
                builder.append(str);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        return  builder.toString();

    }
}

Myapp

package zhanghaijiao.bawei.com.week2_kaoshi;

import android.app.Application;
import android.os.Environment;

import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiscCache;
import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

import java.io.File;

/**
 * Created by jane on 2018/2/23.
 */

public class MyApp extends Application {
    @Override
    public void onCreate() {
        super.onCreate();

        File cachefile=new File(Environment.getExternalStorageDirectory().getPath()+"/image");
        ImageLoaderConfiguration configuration=new ImageLoaderConfiguration.Builder(this)
                .memoryCacheExtraOptions(480, 800)//缓存图片最大的长和宽
                .threadPoolSize(2)//线程池的数量
                .threadPriority(4)
                .memoryCacheSize(2*1024*1024)//设置内存缓存区大小
                .diskCacheSize(20*1024*1024)//设置sd卡缓存区大小
                .diskCache(new UnlimitedDiscCache(cachefile))//自定义缓存目录
                .writeDebugLogs()//打印日志内容
                .diskCacheFileNameGenerator(new Md5FileNameGenerator())//给缓存的文件名进行md5加密处理
                .build();
        ImageLoader.getInstance().init(configuration);

    }
}

Myadapter

package zhanghaijiao.bawei.com.week2_kaoshi;

import android.content.Context;
import android.graphics.Bitmap;
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 com.nostra13.universalimageloader.core.assist.ImageScaleType;

import java.util.List;

/**
 * Created by jane on 2018/2/23.
 */

public class MyAdapter extends BaseAdapter{

    private Context context;
    private List<ResultData.ItemBean> data;
    private DisplayImageOptions options;

    /**
     * 图片在下面
     */
    private final  int ONE_ITEM=0;
    /**
     * 图片在左边
     */
    private final  int TWO_ITEM=1;



    public MyAdapter(Context context, List<ResultData.ItemBean> data) {
        this.context = context;
        this.data = data;

        options=new DisplayImageOptions.Builder()
                .cacheInMemory(true)//使用内存缓存
                .cacheOnDisk(true)//使用磁盘缓存
                .bitmapConfig(Bitmap.Config.RGB_565)//设置图片色彩模式
                .imageScaleType(ImageScaleType.EXACTLY)//设置图片的缩放模式
                .build();

    }

    @Override
    public int getViewTypeCount() {
        return 2;
    }

    @Override
    public int getItemViewType(int position) {
        String type=data.get(position).getType();
        if("slide".equals(type)){
            return ONE_ITEM;
        }else {
            return TWO_ITEM;
        }


    }

    @Override
    public int getCount() {
        return data.size();
    }

    @Override
    public Object getItem(int i) {
        return data.get(i);
    }

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

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        int viewType=getItemViewType(i);
        if(viewType==ONE_ITEM){
            ViewHolder holder;
            if(view==null){
                view=View.inflate(context,R.layout.item2,null);
                holder=new ViewHolder();
                holder.img=view.findViewById(R.id.img);
                holder.textView=view.findViewById(R.id.tv);
                view.setTag(holder);

            }else {
                holder= (ViewHolder) view.getTag();

            }
            holder.textView.setText(data.get(i).getTitle());
            if(data.get(i).getThumbnail()!=null){
                ImageLoader.getInstance().displayImage(data.get(i).getThumbnail(),holder.img,options);
            }
            return view;

        }else {
            ViewHolder holder;
            if(view==null){
                view=View.inflate(context,R.layout.item1,null);
                holder=new ViewHolder();
                holder.img=view.findViewById(R.id.img);
                holder.textView=view.findViewById(R.id.tv);
                view.setTag(holder);

            }else {
                holder= (ViewHolder) view.getTag();

            }
            holder.textView.setText(data.get(i).getTitle());
            if(data.get(i).getThumbnail()!=null){
                ImageLoader.getInstance().displayImage(data.get(i).getThumbnail(),holder.img,options);
            }
            return view;
        }




    }
    class ViewHolder{
        ImageView img;
        TextView textView;
    }
}

data

...........

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