Problems downloading JPEG from the Internet

I am using the following class to download an image. The URL I am sending is correct but url.getContext() returns null every time. Does anybody know why?

package com.WasserSportLotse;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;

import android.content.Context;
import android.graphics.drawable.Drawable;


class ImageDownloader {
    private Drawable d;

    public ImageDownloader(Context ctx, String url, String saveFilename) {
        try {
            InputStream is = (InputStream) this.fetch(url);
            d = Drawable.createFromStream(is, "src");
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrac开发者_如何学Ce();
        }
    }

    public Drawable getImage(){
        return d;
    }

    public Object fetch(String address) throws MalformedURLException,IOException {

        URL url = new URL(address);
        Object content = url.getContent();
        return content;
    }
}

calling url.getContent() will return an image if applicable and only a stream of it's not an image or an audio clip. Though that doesn't seem to be your problem now, it will be a problem once you figure this one out.

Your code looks right. The only thing I can think of is the address isn't built right. It may work in a browser, but the URL class may be more picky than your browser. Make sure you're using the full form URL, with prepending http:// (not just www)

I changed the class quite a bit and found a much simpler version

    private String path = "http://www.*YOURPATH.COM/SOMETHING*";
    private String file;
    private String url;

    public ImageDownloader(String file){
        this.file = URLEncoder.encode(file);
        url = path + this.file;

    }

    public Drawable getImage() throws IOException, MalformedURLException {
        return Drawable.createFromStream(((java.io.InputStream)new java.net.URL(url).getContent()), "name");
}