android 平台上加载、缓存，显示图片的开源代码Android-Universal-Image-Loader

Android-Universal-Image-Loader

android 平台上加载、缓存，显示图片的开源代码（Powerful and flexible library for loading, caching and displaying images on Android.）

1)支持多线程下载图片。

2）支持imageCache.

3)支持diskCache.

下载地址：https://github.com/nostra13/Android-Universal-Image-Loader

里面有example: imagePagerActivity.java

使用方法：

//先设置imageLoader的属性 cacheOnDisk/ memoryCache 等

options = new DisplayImageOptions.Builder()

.showImageForEmptyUri(R.drawable.ic_empty)

.showImageOnFail(R.drawable.ic_error)

.resetViewBeforeLoading(true)

.cacheOnDisk(true)

.imageScaleType(ImageScaleType.EXACTLY)

.bitmapConfig(Bitmap.Config.RGB_565)

.considerExifParams(true)

.displayer(new FadeInBitmapDisplayer(300))

.build();

//显示指定URL的image，里面可能会cache image,或者从cache中取image

imageLoader.displayImage(images[position], imageView, options, new SimpleImageLoadingListener()

//实现onLoadingStarted()/onLoadingFailed()/onLoadingComplete()等回调函数

DefaultConfigurationFactory.java 中设置

//默认的memoryCacheSize 为当前可用内存的1/8

/**

* Creates default implementation of {@link MemoryCache} - {@link LruMemoryCache}<br />

* Default cache size = 1/8 of available app memory.

*/

public static MemoryCache createMemoryCache(int memoryCacheSize) {

if (memoryCacheSize == 0) {

memoryCacheSize = (int) (Runtime.getRuntime().maxMemory() / 8);

}

return new LruMemoryCache(memoryCacheSize);

}

/** Creates reserve disk cache folder which will be used if primary disk cache folder becomes unavailable */

private static File createReserveDiskCacheDir(Context context) {