Can't write to sdcard even with permissions set and external storage in MEDIA_MOUNTED state

Question

While trying to write file to sdcard I get java.io.FileNotFoundException: /filename (Read-only file system) exception. Sadly none of the many solutions posted h

Answer 1

Try this:

File file = new File(Helpers.StripExtension(filePath) + ".blk");
file.createNewFile();
FileOutputStream fos = new FileOutputStream(file);
fos.write(digest.getBytes());
fos.close();

and if that doesn't work, I think you may have a problem when reading from the original file (digest.getBytes()). Post a little more code on this and we can go from there

Edit:

If it is not letting you write to the selected directory, try testing with a path like this:

File file = new File(Environment.getExternalStorageDirectory() + "test_file.blk");

It should work fine and you probably just don't have write permissions to the directory you are using.