Google Drive Android api - Downloading db file from drive

Question

I am using the below code for downloading an already uploaded sqlite db file from google drive to the data/data/packagename/databases folder, but when the method completes,

Answer 1

I was able to finally fix my own issue, by replacing the file.openContents with file.open and setting a result call back with DriveContents result back rather than ContentsResult.

Also, used the DriveContents to set an InputStream on the same (initially opened in Mode_Read_Only in open method) and then writing it out into a physical ".db" file on the data base path location.

Now, the database doesn't get corrupted and restores data successfully.

Answer 2

This solution is not working for me. The sqlite files I got from google drive is more longer than I saved in google drive. That, probably, happen because you are using a Buffereader class and the method readline that reads data in char. In my project and experience this solutions does not work, I got a corrupted sqlite db. So... I save sqlite db in google drive in byte so **I read from google drive the same sqlite db in byte, using BufferedInputStream. This works perfectly for me:

DriveContents contents = result.getDriveContents();
                BufferedInputStream bis = new BufferedInputStream(contents.getInputStream());
                byte[] buffer = new byte[1024];
                int bytesread = 0;
                FileOutputStream outStream;

                /*if(currentDB != null)
                    currentDB.delete();*/

                try
                {
                    outStream = new FileOutputStream(currentDB);
                    while( (bytesread = bis.read(buffer)) != -1)
                    {
                        outStream.write(buffer,0,bytesread);
                    }

                    outStream.flush();
                    bis.close();
                    outStream.close();
                }
                catch (FileNotFoundException e)
                {
                    Log.i(TAG,e.getMessage());
                }
                catch (IOException e)
                {
                    Log.i(TAG,e.getMessage());
                }
                finally {
                    Toast.makeText(getActivity().getBaseContext(),"Data from Google Drive restored successfully." , Toast.LENGTH_LONG).show();
                }
                contents.discard(mGoogleApiClient);