public Bitmap getBitmapFromURL(String imageUrl) {
        try {
            URL url = new URL(imageUrl);
            HttpURLConnection connection = (HttpURLConnection)
                    url.openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStream inputStream = connection.getInputStream();
            Bitmap imageBitmap = BitmapFactory.decodeStream(inputStream);
            return imageBitmap;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

I use this function to get image from url as a bitmap. For a large image bitmap return null. How can ı solve this?

CodePudding user response：

try this bro

 private Bitmap getBitmap(String image_link)
    {
        URL website;

        try {
            website = new URL(image_link);
            HttpURLConnection connection = (HttpURLConnection) website.openConnection();
            InputStream is = connection.getInputStream();

            if(req_width == 0)
            {
                return BitmapFactory.decodeStream(is);
            }


            final BitmapFactory.Options options = new BitmapFactory.Options();
            options.inJustDecodeBounds = true;
            BitmapFactory.decodeStream(is, null, options);
            is.close();


            connection = (HttpURLConnection) website.openConnection();
            is = connection.getInputStream();
            options.inSampleSize = calculateInSampleSize(options, req_width, req_height);
            options.inJustDecodeBounds = false;
            return BitmapFactory.decodeStream(is, null , options);

        } catch (Exception  e) {
            return null;
        }
    }

    public static int calculateInSampleSize(
            BitmapFactory.Options options, int reqWidth, int reqHeight) {
        // Raw height and width of image
        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (height > reqHeight || width > reqWidth) {

            final int halfHeight = height / 2;
            final int halfWidth = width / 2;

            // Calculate the largest inSampleSize value that is a power of 2 and keeps both
            // height and width larger than the requested height and width.
            while ((halfHeight / inSampleSize) >= reqHeight
                    && (halfWidth / inSampleSize) >= reqWidth) {
                inSampleSize *= 2;
            }
        }

        return inSampleSize;
    }

CodePudding user response：

Code modified. See if this works If the bitmap is null, this code will replace it with another sample bitmap.

  public Bitmap getBitmapFromURL(String imageUrl) {
        try {
            URL url = new URL(imageUrl);
            HttpURLConnection connection = (HttpURLConnection)
                    url.openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStream inputStream = connection.getInputStream();
            Bitmap imageBitmap = BitmapFactory.decodeStream(inputStream);
            if(bitmap == null){
                imageBitmap = 
  BitmapFactory.decodeResource(context.getResources(),R.drawable.your_sample_image);
    
            return imageBitmap;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }