How to save a BLOB data type file on a device?

Question

Any help on how to get a file which is saved in MySQL and then save it in a folder on my mobile phone.

I am working on an android application which in some stage it selects files from the database, these files are stored as BLOB....then I would like to save those selected files on my device (Environment.getExternalStorageDirectory().getAbsolutePath()+ "/Testing/")

Obviously I am connecting android to MySQL using PHP. How can I achieve this?

Answer 1

I think, you should convert Blob to Bitmap at first, and then covert that Bitmap to a File and save this file on your external storage. For example, if you're getting image from MySql database:

Blob blob = // get Blob from MySql database 
byte [] bytes = blob.getBytes(1, (int) blob.length());
Bitmap bmp = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Testing/";
File dir = new File(filePath);
File file = new File(dir, "filename.png");
FileOutputStream fOut = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.PNG, 85, fOut);
fOut.flush();
fOut.close();