ImageLoader_下载图片并缓存

private ImageView iv;
private String url="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1503460480074&di=73f55fbd2d7d629dfefbf1ed9ebaf7df&imgtype=0&src=http%3A%2F%2Fwww.fengdu100.com%2Fuploads%2Fallimg%2F170707%2F201345F54-3.png";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    initView();


    DisplayImageOptions options=new DisplayImageOptions.Builder()
            .cacheInMemory(true)
            .cacheOnDisk(true)
            .considerExifParams(true)
            .build();
    ImageLoaderConfiguration config=new ImageLoaderConfiguration.Builder(this)
            .defaultDisplayImageOptions(options)
            .memoryCache(new UsingFreqLimitedMemoryCache(2*1024*1024))
            .threadPoolSize(3)
            .diskCache(new UnlimitedDiskCache(new File("F:\\table")))
            .diskCacheFileNameGenerator(new Md5FileNameGenerator())
            .build();
    ImageLoader.getInstance().init(config);
    ImageLoader.getInstance().displayImage(url,iv);
}

private void initView() {
    iv = (ImageView) findViewById(R.id.iv);
}



<?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="com.example.wangaishi20170823_imageloader.MainActivity">

    <ImageView
        android:id="@+id/iv"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>