Get the file into ByteArray in Android ?

private byte[] convertToByteArray(final File file) {
   if (file.isDirectory())
       throw new RuntimeException("Unsupported operation, file "
                       + file.getAbsolutePath() + " is a directory");
   if (file.length() > Integer.MAX_VALUE)
       throw new RuntimeException("Unsupported operation, file "
                       + file.getAbsolutePath() + " is too big");

   Throwable pending = null;
   FileInputStream in = null;
   final byte buffer[] = new byte[(int) file.length()];
   try {
       in = new FileInputStream(file);
       in.read(buffer);
   } catch (Exception e) {
       pending = new RuntimeException("Exception occured on reading file "
                       + file.getAbsolutePath(), e);
   } finally {
       if (in != null) {
               try {
                       in.close();
               } catch (Exception e) {
                       if (pending == null) {
                               pending = new RuntimeException(
                                       "Exception occured on closing file"
                            + file.getAbsolutePath(), e);
                       }
               }
       }
       if (pending != null) {
               throw new RuntimeException(pending);
       }
   }
   return buffer;
}