Imageloader框架

package adapter;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Environment;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.examday08.R;
import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiscCache;
import com.nostra13.universalimageloader.cache.disc.naming.HashCodeFileNameGenerator;
import com.nostra13.universalimageloader.cache.memory.impl.LruMemoryCache;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import com.nostra13.universalimageloader.core.assist.QueueProcessingType;
import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;
import com.nostra13.universalimageloader.core.download.BaseImageDownloader;

import java.io.File;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;

import bean0.Result;

/**
 * Created by lenovo on 2017/12/6.
 */

public class MyAdapter extends BaseAdapter {
    private List<Result.NewslistBean>list;
    private Context context;

    public MyAdapter(List<Result.NewslistBean> list, Context context) {
        this.list = list;
        this.context = context;
        File cacheDir= new File(Environment.getExternalStorageDirectory().getPath()+"/aaa");//自定义 sd卡的缓存路径

        //第一步：对ImageLoader进行初使化
        ImageLoaderConfiguration configuration=new ImageLoaderConfiguration.Builder(context)
                .memoryCacheExtraOptions(320, 450) // default = device screen dimensions 内存缓存文件的最大长宽
                .diskCacheExtraOptions(480, 800, null)  // 本地缓存的详细信息(缓存的最大长宽)，最好不要设置这个
                .threadPriority(Thread.NORM_PRIORITY - 2) // default 设置当前线程的优先级
                .tasksProcessingOrder(QueueProcessingType.FIFO) // default
                .denyCacheImageMultipleSizesInMemory()
                .memoryCache(new LruMemoryCache(10 * 1024 * 1024)) //可以通过自己的内存缓存实现
                .memoryCacheSize(2 * 1024 * 1024)  // 内存缓存的最大值
                .memoryCacheSizePercentage(13) // default

                .diskCache(new UnlimitedDiscCache(cacheDir)) // 磁盘缓存 --default 可以自定义缓存路径

                .diskCacheSize(20 * 1024 * 1024) // 50 Mb sd卡(本地)缓存的最大值

                .diskCacheFileCount(100)  // 可以缓存的文件数量
                // default为使用HASHCODE对UIL进行加密命名， 还可以用MD5(new Md5FileNameGenerator())加密
                .diskCacheFileNameGenerator(new HashCodeFileNameGenerator())
                .imageDownloader(new BaseImageDownloader(context)) // default
                .defaultDisplayImageOptions(DisplayImageOptions.createSimple()) // default
                .writeDebugLogs() // 打印debug log
                .build();

        ImageLoader.getInstance().init(configuration);

    }

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

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

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

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {

        view =View.inflate(context, R.layout.item,null);
        TextView text = view.findViewById(R.id.text1);
        ImageView img1 = view.findViewById(R.id.img);

        text.setText(list.get(i).getTitle());
        //第二步：进行图片的显示配置
        DisplayImageOptions options=new DisplayImageOptions.Builder()
                .cacheInMemory(true)//使用内存缓存
                .cacheOnDisk(true)//使用磁盘缓存

                .showImageOnLoading(R.mipmap.ic_launcher)//设置正在下载的图片
                .showImageForEmptyUri(R.mipmap.ic_launcher)//url为空或请求的资源不存在时
                .showImageOnFail(R.mipmap.ic_launcher)//下载失败时显示的图片

                .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===imageView,,ScaleType
                .displayer(new RoundedBitmapDisplayer(100))//设置图片圆角显示  弧度
                .build();

        //第三步：下载图片
        ImageLoader.getInstance().displayImage(list.get(i).getPicUrl(), img1, options);
      //  new MyTask(img1).execute(list.get(i).getPicUrl());
        return view;
    }
    class  MyTask extends AsyncTask<String,Void,Bitmap> {
        private ImageView img;

        public MyTask(ImageView img) {
            this.img = img;
        }

        @Override
        protected Bitmap doInBackground(String... strings) {
            Bitmap bitmap = null;
            StringBuilder builder =new StringBuilder();
            try {
                URL url = new URL(strings[0]);
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();

                connection.setRequestMethod("GET");
                connection.setReadTimeout(5000);
                connection.setConnectTimeout(5000);
                if (connection.getResponseCode()==200){
                    InputStream inputStream = connection.getInputStream();
                    bitmap = BitmapFactory.decodeStream(inputStream);

                }

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

        @Override
        protected void onPostExecute(Bitmap s) {
            img.setImageBitmap(s);

        }
    }
}