Question

I am working on a function to download an image from a web server, display it on the screen, and if the user wishes to keep the image, save it on the SD card in a certain folder. Is there an easy way to take a bitmap and just save it to the SD card in a folder of my choice?

My issue is that I can download the image, display it on screen as a Bitmap. The only way I have been able to find to save an image to a particular folder is to use FileOutputStream, but that requires a byte array. I am not sure how to convert (if this is even the right way) from Bitmap to byte array, so I can use a FileOutputStream to write the data.

The other option I have is to use MediaStore :

MediaStore.Images.Media.insertImage(getContentResolver(), bm,     barcodeNumber + '.jpg Card Image', barcodeNumber + '.jpg Card Image'); 

Which works fine to save to SD card, but does not allow you to customize the folder.

Answer 1

try (FileOutputStream out = new FileOutputStream(filename)) {     bmp.compress(Bitmap.CompressFormat.PNG, 100, out); // bmp is your Bitmap instance     // PNG is a lossless format, the compression factor (100) is ignored } catch (IOException e) {     e.printStackTrace(); }