Bitmap From Url Android

I'm trying to get a png Bitmap from URL but the Bitmap is always NULL in with this code: private class DownloadImageTask extends AsyncTask { Ima

Solution 1:

This is a simple one line way to do it:

URLurl=newURL("http://....");
    Bitmapimage= BitmapFactory.decodeStream(url.openConnection().getInputStream());

Solution 2:

I suggest to use a Thead (async) to avoid exception errors :

Threadthread=newThread(newRunnable(){
            @Overridepublicvoidrun() {
                Bitmap thumb;
                // Ur URLStringlink= value.toString();
                try {
                    URLurl=newURL(link);
                    thumb = BitmapFactory.decodeStream(url.openConnection().getInputStream());
                   // UI component
                    imageView.setImageBitmap(thumb);

                } catch (Exception e) {
                    Log.e("error message", Objects.requireNonNull(e.getMessage()));
                }
            }
        });
        thread.start();

Solution 3:

You can try code below...

publicstatic Bitmap loadBitmap(String url) {
        Bitmapbitmap=null;
        InputStreamin=null;
        BufferedOutputStreamout=null;
        intIO_BUFFER_SIZE=4 * 1024;
        try {
            URIuri=newURI(url);
            url = uri.toASCIIString();
            in = newBufferedInputStream(newURL(url).openStream(),
                    IO_BUFFER_SIZE);
            finalByteArrayOutputStreamdataStream=newByteArrayOutputStream();
            out = newBufferedOutputStream(dataStream, IO_BUFFER_SIZE);
            int bytesRead;
            byte[] buffer = newbyte[IO_BUFFER_SIZE];
            while ((bytesRead = in.read(buffer)) != -1) {
                out.write(buffer, 0, bytesRead);
            }
            out.flush();
            finalbyte[] data = dataStream.toByteArray();
            BitmapFactory.Optionsoptions=newBitmapFactory.Options();
            bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,
                    options);
        } catch (IOException e) {
            returnnull;
        } catch (URISyntaxException e) {
            e.printStackTrace();
        } finally {
            try {
                in.close();
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return bitmap;
    }

Solution 4:

If you try the http url in a browser you see that it redirects to a https. Thats your problem. BitmapFactory.decodeStream will not do this redirection so it returns null.

Solution 5:

To get a bitmap from URL, try this:

public Bitmap getBitmapFromURL(String src) {
        try {
            java.net.URLurl=newjava.net.URL(src);
            HttpURLConnectionconnection= (HttpURLConnection) url
                    .openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStreaminput= connection.getInputStream();
            BitmapmyBitmap= BitmapFactory.decodeStream(input);
            return myBitmap;
        } catch (IOException e) {
            e.printStackTrace();
            returnnull;
        }
    }

Or:

publicstatic Bitmap loadBitmap(String url) {
    Bitmapbitmap=null;
    InputStreamin=null;
    BufferedOutputStreamout=null;

    try {
        in = newBufferedInputStream(newURL(url).openStream(), IO_BUFFER_SIZE);

        finalByteArrayOutputStreamdataStream=newByteArrayOutputStream();
        out = newBufferedOutputStream(dataStream, IO_BUFFER_SIZE);
        copy(in, out);
        out.flush();

        finalbyte[] data = dataStream.toByteArray();
        BitmapFactory.Optionsoptions=newBitmapFactory.Options();
        //options.inSampleSize = 1;

        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
    } catch (IOException e) {
        Log.e(TAG, "Could not load Bitmap from: " + url);
    } finally {
        closeStream(in);
        closeStream(out);
    }

    return bitmap;
}