How To Use universal image loader offline caching?

Question

Is it possible to catch offline using universal image loader? If possible, how to use it? Using configs? How To Set Download Directory manually?

out of memory erroron load huge images :

my codes :

DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder()
            .cacheOnDisc(true).cacheInMemory(true)
            .imageScaleType(ImageScaleType.IN_SAMPLE_INT)
            .displayer(new FadeInBitmapDisplayer(300)).build();
    ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(G.appConfigs.context)
            .defaultDisplayImageOptions(defaultOptions)
            .memoryCacheExtraOptions(480, 800) // default = device screen dimensions
            .diskCacheExtraOptions(480, 800, null)
            .memoryCache(new WeakMemoryCache())
            .memoryCache(new LruMemoryCache(2 * 1024 * 1024))
            .memoryCacheSize(2 * 1024 * 1024)
            .discCacheSize(300 * 1024 * 1024)
            .build();
    ImageLoader.getInstance().init(config);
    // END - UNIVERSAL IMAGE LOADER SETUP

    ImageLoader imageLoader = ImageLoader.getInstance();

        DisplayImageOptions options = new DisplayImageOptions.Builder().cacheInMemory(true)
            .cacheOnDisc(true).resetViewBeforeLoading(true)
            .showImageForEmptyUri(R.drawable.no_pic)
            .showImageOnFail(R.drawable.load_failed)
            .showImageOnLoading(R.drawable.img_thumb).build();

    //download and display image from url
    imageLoader.displayImage(imgURL, img, options);

how to resolve it ?

Answer 1

You can use the ImageLoaderConfiguration.Builder class to customize disk caching. This includes the methods:

• diskCacheExtraOptions()
• diskCacheSize() (in bytes).
• diskCacheFileCount()
• diskCacheFileNameGenerator()
• and some others.

Or you can just use diskCache(DiskCache) to provide a custom class for implementing offline caching.

From the example in the Configuration section of the wiki:

File cacheDir = StorageUtils.getCacheDirectory(context);
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context)
    .memoryCacheExtraOptions(480, 800) // default = device screen dimensions
    .diskCacheExtraOptions(480, 800, null)
    .taskExecutor(...)
    .taskExecutorForCachedImages(...)
    .threadPoolSize(3) // default
    .threadPriority(Thread.NORM_PRIORITY - 1) // default
    .tasksProcessingOrder(QueueProcessingType.FIFO) // default
    .denyCacheImageMultipleSizesInMemory()
    .memoryCache(new LruMemoryCache(2 * 1024 * 1024))
    .memoryCacheSize(2 * 1024 * 1024)
    .memoryCacheSizePercentage(13) // default
    .diskCache(new UnlimitedDiscCache(cacheDir)) // default
    .diskCacheSize(50 * 1024 * 1024)
    .diskCacheFileCount(100)
    .diskCacheFileNameGenerator(new HashCodeFileNameGenerator()) // default
    .imageDownloader(new BaseImageDownloader(context)) // default
    .imageDecoder(new BaseImageDecoder()) // default
    .defaultDisplayImageOptions(DisplayImageOptions.createSimple()) // default
    .writeDebugLogs()
    .build();

Answer 2

But if you restart your device or clean your cache by anyway it will not work offline as the cached files will be deleted.
To Show offline images you have to download images on sd-card to a specific folder and have to pick from there in case on offline.