CODEWITHSUNDEEP
javaandroiddownloadlocal-storagedropbox
Nicolas LOFFREDO
Nicolas LOFFREDO

Reputation: 1

Download file from Dropbox to local android Java

I spent some days on this code without finding the solution. Could you help me please?

I want to download a file from a Dropbox account to the application storage (local memory). When I open the file for the first time, the application crashes then when I restart the application, the file can be open from the local memory.

private void ImportDB(String nameDB)
  {
          try {
              File data = Environment.getDataDirectory();

                  //Local file
                  String backupDBPath = "//data//[Package name]//databases//"+nameDB;
                  File backupDB = new File(data, backupDBPath);

                  //Dropbox file                      
                  DbxPath testPath = new DbxPath(DbxPath.ROOT, nameDB);
                  DbxFileSystem dbxFs = DbxFileSystem.forAccount(mDbxAcctMgr.getLinkedAccount());


                  DbxFile testFile = dbxFs.open(testPath);

                    FileChannel src = testFile.getReadStream().getChannel();
                    FileChannel dst = new FileOutputStream(backupDB).getChannel();

                     //Transfert to local
                      dst.transferFrom(src, 0, src.size());

                      //close
                      src.close();
                      dst.close();
                      testFile.close();
          }
          catch (Exception e)
          {

          }
  }

I guess it is a question of synchronization: the file is not yet copied when I try to open it. I tried this code for waiting the file but it doesn't work, the program stays in the while loop:

Thread mThread = new Thread()
            {
            @SuppressLint("NewApi") @Override
            public void run()
            {
                    //open the local file
                    File data = Environment.getDataDirectory();
                    String currentDBPath = "//data//[Package name]//databases//"+nameFileDB";
                    File currentDB = new File(data, currentDBPath);

                    // test when the file is downloaded
                    while (!currentDB.exists())
                    {
                        Log.i("tag", "In loop");

                        try {
                            Thread.sleep(1000);
                        } catch (InterruptedException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }

                    //CODE TO OPEN THE FILE HERE

                }
            }
            };
            mThread.start();

Any idea???

Upvotes: 0

Views: 654

Answers (1)

Wonil
Wonil

Reputation: 6727

I think you can use AsyncTask to achieve your goal.

Upvotes: 1

Related Questions