Universal Image Loader reuse images

问题

Using Universal Image Loader, is it possible to directly save images to disk and reuse those images between different runs of the application?

I know imageLoader.displayImage(imageURI, itemHolder.image, options); gets images from the cache the second time, but if you exit the app the cache is removed.

I want the display image method to save the image to a permanent location and use that location every time the app calls that method.

Is this possible using Universal Image Loader or do I need to find another way?

回答1:

Try to use

.discCache(new FileCountLimitedDiscCache(cacheDir, new Md5FileNameGenerator(), 1000))

option in ImageLoaderConfiguration

It work for me.

回答2:

you can save the image to a hidden folder then re-use it any time.

String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/.saved_images");    
myDir.mkdirs();
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image-"+ n +".jpg";
File file = new File (myDir, fname);
if (file.exists ()) file.delete (); 
try {
       FileOutputStream out = new FileOutputStream(file);
       finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
       out.flush();
       out.close();

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

and this in your manifest

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

note the . I inserted before the folder name, which will make the folder hidden.

来源：https://stackoverflow.com/questions/18812411/universal-image-loader-reuse-images

标签

android

image

universal-image-loader