Question

How I can impement two cahing strategy in one application. Eg images from one app section should be cashing in one folder and have max memory/time limit etc. And images from another section should be have another folder etc. These strategies should not depend on each other.

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Solution

ImageLoader is singleton but it provides protected constructor so you can extend ImageLoader and create the 2nd singleton:

public class ImageLoader2 extends ImageLoader {

    private volatile static ImageLoader instance;

    /** Returns singleton class instance */
    public static ImageLoader getInstance() {
        if (instance == null) {
            synchronized (ImageLoader2.class) {
                if (instance == null) {
                    instance = new ImageLoader2();
                }
            }
        }
        return instance;
    }
}

and use it with other configuration.

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