Android Drawable Images from URL

Question

I am presently using the following piece of code to load in images as drawable objects form a URL.

Drawable drawable_from_url(String url, String src_name) 
throws java.net.MalformedURLException, java.io.IOException {
        return Drawable.createFromStream(((java.io.InputStream)new java.net.URL(url).getContent()), src_name);

}

This code works exactly as wanted, but there appears to be compatibility problems with it. In version 1.5, it throws a FileNotFoundException when I give it a URL. In 2.2, given the exact same URL, it works fine. The following URL is a sample input I am giving this function.

http://bks6.books.google.com/books?id=aH7BPTrwNXUC&printsec=frontcover&img=1&zoom=5&edge=curl&sig=ACfU3U2aQRnAX2o2ny2xFC1GmVn22almpg

How would I load in images in a way that is compatible across the board from a URL?

score 51 · Answer 1 · edited Jul 10 '19 at 13:02

51

Bitmap is not a Drawable. If you really need a Drawable do this:

public static Drawable drawableFromUrl(String url) throws IOException {
    Bitmap x;

    HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
    connection.connect();
    InputStream input = connection.getInputStream();

    x = BitmapFactory.decodeStream(input);
    return new BitmapDrawable(Resources.getSystem(), x);
}

(I used the tip found in https://stackoverflow.com/a/2416360/450148)

edited Jul 10 '19 at 13:02

Joonsoo

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answered Feb 28 '12 at 21:31

Felipe

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Great answer, but note that the constructor is deprecated. Use BitmapDrawable(Resources, Bitmap) to ensure that the drawable has correctly set its target density – avalancha Nov 11 '15 at 08:21
great, answered. should be updated due to deprecated – mochadwi Feb 19 '19 at 14:17

score 15 · Accepted Answer · edited Aug 23 '17 at 04:18

15

Solved it myself. I loaded it in as a bitmap using the following code.

Bitmap drawable_from_url(String url) throws java.net.MalformedURLException, java.io.IOException {

    HttpURLConnection connection = (HttpURLConnection)new URL(url) .openConnection();
    connection.setRequestProperty("User-agent","Mozilla/4.0");

    connection.connect();
    InputStream input = connection.getInputStream();

    return BitmapFactory.decodeStream(input);
}

It was also important to add in the user agent, as googlebooks denies access if it is absent

edited Aug 23 '17 at 04:18

OneCricketeer

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answered Aug 03 '10 at 14:44

Señor Reginold Francis

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It's Throws Exception like android.os.NetworkOnMainThreadException – Prince Dholakiya Feb 21 '19 at 04:30
This is incorrect, @Prince see my answer using an AsyncTask to avoid NetworkOnMainThreadException. – Jorgesys Jul 27 '19 at 16:36

score 5 · Answer 3 · answered Jul 30 '10 at 20:47

5

I'm not sure, but I think that Drawable.createFromStream() is more intended for use with local files rather than downloaded InputStreams. Try using BitmapFactory.decodeStream(), then wrapping the return Bitmap in a BitmapDrawable.

answered Jul 30 '10 at 20:47

Dan Lew

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I seem to remember running into that problem before; I was on 1.5 at the time. – I82Much Jul 31 '10 at 04:04

score 2 · Answer 4 · answered May 07 '19 at 18:06

To get a Drawable image from an URL you must use an AsyncTask to avoid NetWorkOnMainThreadException, and the result Drawable obtained in onPostExecute() you can set to your ImageView:

    final String urlImage = "https://www.android.com/static/2016/img/hero-carousel/banner-android-p-2.jpg";

    new AsyncTask<String, Integer, Drawable>(){

        @Override
        protected Drawable doInBackground(String... strings) {
            Bitmap bmp = null;
            try {
                HttpURLConnection connection = (HttpURLConnection) new URL(urlImage).openConnection();
                connection.connect();
                InputStream input = connection.getInputStream();
                bmp = BitmapFactory.decodeStream(input);
            } catch (IOException e) {
                e.printStackTrace();
            }
            return new BitmapDrawable(bmp);
        }

        protected void onPostExecute(Drawable result) {

            //Add image to ImageView
            myImageView.setImageDrawable(result);

        }


    }.execute();

score 1 · Answer 5 · edited Oct 30 '12 at 10:22

1

The following code works for me:

Matrix Mat = new Matrix();

Bitmap Source = BitmapFactory.decodeFile("ItemImagePath");

Bitmap Destination = Bitmap.createScaledBitmap( Source, 320, 320, true );

Source = Bitmap.createBitmap( Destination, 0, 0, Destination.getWidth(), Destination.getHeight(),Mat, true );

ItemImageView.setImageBitmap(Source);

edited Oct 30 '12 at 10:22

Aziz Shaikh

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answered Oct 30 '12 at 10:04

Dhukkaieswaran.N

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Adriaan Koster · Answer 6 · 2013-10-22T10:37:19.590

0

You can use com.androidquery.AndroidQuery to do this quite simply. For example:

AQuery aq = new AQuery(this);
aq.id(view).image("http://yourserver/yourimage.png", true, true, 300, new BitmapAjaxCallback() {
        @Override
        public void callback(String url, ImageView imageView, Bitmap bitmap, AjaxStatus status) {
            Drawable drawable = new BitmapDrawable(getResources(), bm);
        }
    });

If you use the BitmapAjaxCallback you will get access to the BitMap which you can wrap as a BitmapDrawable.

edited Oct 22 '13 at 10:37

answered Jul 15 '13 at 14:21

Adriaan Koster

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The person asked for some way to create a drawable from an url,yours one is doing that underneath,no way of getting the **drawable**;rather you pass a view and the library sets the image on it which is downloaded from the url.So how it can be considered to be an answer for the question? – Munim Oct 22 '13 at 06:42

Android Drawable Images from URL

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