FileCache.java

package org.softeg.slartus.forpdaplus.classes.LazyGallery;

/**
 * User: slinkin
 * Date: 25.11.11
 * Time: 13:11
 */

import android.content.Context;

import java.io.File;
import java.io.IOException;

public class FileCache {

    private File cacheDir;

    public FileCache(Context context) throws IOException {
        cacheDir = context.getCacheDir();
        if (!cacheDir.exists())
            cacheDir.mkdirs();
    }

    public File getFile(String url) {
        //I identify images by hashcode. Not a perfect solution, good for the demo.
        String filename = String.valueOf(url.hashCode());
        //Another possible solution (thanks to grantland)
        //String filename = URLEncoder.encode(url);
        File f = new File(cacheDir, filename);
        return f;

    }

    public void clear() {
        File[] files = cacheDir.listFiles();
        for (File f : files)
            f.delete();
    }

}