How to get the file ID so I can perform a download of a file from Google Drive API on Android

Question

I am working on an Android project and I am trying to make use of the Google Drive API and I ve got most of it working but I am having an issue in how I perform a download    I can t find anywhere how I get the file ID so that I can perform the download  In order to test I ve retrieved all files in my drive account and added them to a list array and then got the ID for the first file in the list    I then copied the file ID in to the command to download the file and this worked successfully but I have no idea how to get the file id of the specific file I want to download    Below is the code I am using to download the file   private void downloadFile         Thread thread   new Thread new Runnable               Override         public void run                 try                                com google api services drive model File file   service files   get  0B-Iak7O9SfIpYk9zTjZvY2xreVU   execute                      FileList file   service files   list   execute                      List lt com google api services drive model File gt  fileList   file getItems                      com google api services drive model File fileItem   fileList get 0                     Log d  FileID    fileItem getId                       Log d  Count    Retreived file list                    if  file getDownloadUrl      null  amp  amp  file getDownloadUrl   length    gt  0                                        HttpResponse resp   service getRequestFactory   buildGetRequest new GenericUrl file getDownloadUrl     execute                        InputStream inputStream   resp getContent                        writeToFile inputStream                                                catch  IOException e                                Log e  WriteToFile   e toString                     e printStackTrace                                        thread start        0B-Iak7O9SfIpYk9zTjZvY2xreVU is the file ID of the file that I download which I retrieved when I did a list and selected the first file  but how can I say I want to download  File 1 and get its ID to then pass this to the service get   execute function    Basically my end goal is within my app  I upload an XML file to Google Drive  and then later on Download the file  It will only be one file and will always have the same name  Am I going about it the right away or is there a better way to achieve what I am trying to do

User · Answer

Click with the right mouse button on the file in your Google Drive  Choose the option to get a link which can be shared from the menu  You will see the file id now  Don t forget to undo the share

User · Answer

In my opinion the easiest and fastest way to get a Google Drive file ID is from Google Drive on the web  Right-click the file name and select Get shareable link  The last part of the link is the file ID  Then you can cancel the sharing

User · Answer

This script logs all the file names and ids in the drive        Log the name and id of every file in the user s Drive function listFiles       var files   DriveApp getFiles      while   files hasNext           var file   files next        Logger log  file getName           file getId                Also  the  Files  list  page has a form at the end that lists the metadata of all the files in the drive  that can be used in case you need but a few ids

User · Answer

Stan0 intial idea is not a good idea  There can be multiple files with the same name  Very error prone implementation  Stan0 s second idea is the correct way   When you first upload the file to google drive store its id  in SharedPreferences is probably easiest  for later use  ie   file  mDrive files   insert body  execute           initial insert of file to google drive  whereverYouWantToStoreIt  file getId      now you have the guaranteed unique id                                            of the file just inserted  Store it and use it                                            whenever you need to fetch this file

User · Answer

Well the first option I could think of is that you could send a list request with search parameters for your file  like title  File 1 xml  and fileExtension  xml   It will either return an empty list of files  there isn t one matching the serach criteria   or return a list with at least one file  If it s only one - it s easy  But if there are more - you ll have to select one of them based on some other fields  Remember that in gdrive you could have more than 1 file with the same name  So the more search parameters you provide  the better

User · Answer

One way is to associating unique properties with your file while creation   properties            key  somekey  and       value  somevalue       then create a query   query    title              title                    AND    mimeType              mimeType                    AND    trashed   false              AND    properties has     properties   All the file properties title  etc  already known to you can go here   properties

User · Answer

If you know the the name of the file and if you always want to download that specific file  then you can easily get the ID and other attributes for your desired file from  https   developers google com drive v2 reference files list  towards the bottom you will find a way to run queries   In the q field enter title    your file name  and run it  You should see some result show up right below and within it should be an  id  field  That is the id you are looking for    You can also play around with additional parameters from  https   developers google com drive search-parameters

[android] How to get the file ID so I can perform a download of a file from Google Drive API on Android?

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