Android - Using Universal Image Loader in static class

Question

Can I use Universal Image Loader lib in a static class? Meaning creating one instance of image loader and modifying it to static.

What is the best method to use this lib in different multiple fragments and classes? How can I improve caching feature?

Answer 1

The best way to use Universal Image Loader is to create a single instance when your App starts up and then get that instance throughout the app

Here is the App class

 public class App extends Application {

    public ImageLoader imageLoader;

    public ImageLoader getImageLoader() {
        return imageLoader;
    }

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

        // UNIVERSAL IMAGE LOADER SETUP
        DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder()
                .resetViewBeforeLoading(true)
                .cacheOnDisk(true)
                .cacheInMemory(true)
                .displayer(new FadeInBitmapDisplayer(300))
                .build();

        ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext())
                .defaultDisplayImageOptions(defaultOptions)
                .memoryCache(new WeakMemoryCache())
                .diskCacheSize(100 * 1024 * 1024)
                .build();

        this.imageLoader = ImageLoader.getInstance();
        imageLoader.init(config);

        // END - UNIVERSAL IMAGE LOADER SETUP
    }
}

Make sure the application tag in AndroidManifest.xml has android:name=”.App” attribute

To get the instance, in an Activity

ImageLoader imageLoader = ((App)getApplicationContext()).getImageLoader();

outside Activity

ImageLoader imageLoader = ((App)context.getApplicationContext()).getImageLoader();

You can refer this blog.