ImagerLoder加载图片

public class MyAppliction extends Application {

@Override
public void onCreate() {
super.onCreate();

ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this).build();
ImageLoader.getInstance().init(configuration);
}
}

Context context;
List<MyBean.NewslistBean> list;

public MyAdapter(Context context, List<MyBean.NewslistBean> list) {
this.context = context;
this.list = list;

//重点

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)//设置图片格式
.displayer(new RoundedBitmapDisplayer(20))//设置圆角图片
.build();

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

@Override
public Object getItem(int position) {
return null;
}

@Override
public long getItemId(int position) {
return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = View.inflate(context, R.layout.list_item, null);
}
ImageView img = (ImageView) convertView.findViewById(R.id.img);
TextView tv = (TextView) convertView.findViewById(R.id.tv);

//重点：
ImageLoader.getInstance().displayImage(list.get(position).getPicUrl(),img);

    tv.setText(list.get(position).getTitle());

return convertView;
}