B4A Class Dropbox API V2. All HTTP! All using httputils2

Update April 2017:
Google has changed the ability to use a Webview to get an OAuth-Token. Due to this change it no longer works to get an OAuth-Token using a Webview.
This library is not useable anymore except if you use the Lib only using YOUR token which is hardcoded in your app. This will work.
But if you need to get Access to a Users Dropbox then you can´t use this lib anymore. I suggest to switch to my Java-Wrap for the Drobox Api V2. Here you are able to get an OAuth-Token as this lib does not depend on a Webview.

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As you can read here Dropbox has decided to deprecate the Sync and Datastore APIs over the next 12 months. Drobox has now released an new preview site for the new V2 API

Dropbox released an API Explorer for their V2 api.
See the announce too for the explorer.

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This thread is about the HTTP version of the new Dropbox V2 api.
See the documentation here: https://www.dropbox.com/developers-preview/documentation/http#documentation

The attached B4A Library is using this new HTTP Api

The Library is available as Library (jar + xml). Please download DropboxV2_libraryfiles_v091.zip to get the files. Extract the content to your additional Librariespath

Please download DropboxHTTPv2librarysource_V0.91 if you want to change the class. Use this project and compile it to a library to get the correct jar and xml created by yourself
In most cases you dont need this one.

DropboxHttpAPI
Author: DonManfred <msy1912@gmail.com>
Version: 0.93

• DropBox
  Events:
  • Account (meta As Map)
  • AddFolderMember (meta As Map)
  • Copy (meta As Map)
  • CreateFolder (path_lower As String, name As String)
  • CreateSharedLink (meta As Map)
  • CurrentAccount (meta As Map)
  • Delete (meta As Map)
  • Delta (meta As Map)
  • DownloadLink (meta As Map)
  • FileDownloadFinished (session As Map)
  • FileSearch (result As Map)
  • FileUpload (session As Map)
  • FolderMetadata (meta As Map)
  • GetSharedLinks (meta As Map)
  • GetURLJob (meta As Map)
  • JobStatus (meta As Map)
  • LatestCursor (meta As Map)
  • ListFolder (meta As Map)
  • ListFolders (folders As Map)
  • ListfolderMembers (meta As Map)
  • MetaData (meta As Map)
  • MountFolder (meta As Map)
  • Move (meta As Map)
  • Preview (meta As Map)
  • RelinquishFolderMembership (meta As Map)
  • RemoveFolderMember (meta As Map)
  • Revisions (revs As Map)
  • RevokeSharedLink (meta As Map)
  • SaveURL (meta As Map)
  • ShareFile (meta As Map)
  • ShareFolder (folders As Map)
  • ShareJobStatus (meta As Map)
  • SpaceUsage (meta As Map)
  • Thumbnail (bmp As Bitmap, Tag As Object)
  • TransferFolder (meta As Map)
  • UnmountFolder (meta As Map)
  • UnshareFolder (meta As Map)
  • UpdateFolderMember (meta As Map)
  • UpdateFolderPolicy (meta As Map)
  • UploadSessionFinish (session As Map)
  • UploadSessionStatus (session As Map)
  Methods:
  • IsInitialized As Boolean
    Tests whether the object has been initialized.
  • add_folder_member (shared_folder_id As String, email As String, dropbox_id As String, access_level As String, quiet As Boolean, custom_message As String) As String
    Allows an owner or editor (if the ACL update
    policy allows) of a shared folder to add
    another member.
    For the new member To get access To all the
    functionality For this folder, you will need
    To call mount_folder on their behalf.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • check_job_status (async_job_id As String) As String
    Returns the status of an asynchronous job.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • check_share_job_status (async_job_id As String) As String
    Returns the status of an asynchronous job for
    sharing a folder.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • copy (fromPath As String, toPath As String) As String
    Copy a file or folder to a different location in
    the user's Dropbox.
    If the source path Is a folder all its contents
    will be copied.
  • createfolder (path As String) As String
    Create a folder at a given path.
  • createsharedlink (path As String, shorturl As Boolean) As String
    Create a shared link.
    If a shared link already exists For the given path,
    that link Is returned.
    
    Note that in the returned PathLinkMetadata, the
    PathLinkMetadata.url field Is the shortened URL
    If CreateSharedLinkArg.short_url argument Is set
    to True.
    Previously, it was technically possible To break
    a shared link by moving Or renaming the corresponding
    File Or folder. In the future, this will no longer
    be the Case, so your app shouldn't rely on this
    behavior. Instead, if your app needs to revoke a
    shared link, use revoke_shared_link.
  • delete (path As String) As String
    Not yet finished....
  • download (path As String, destpath As String, destfile As String) As String
    Download a file from a user's Dropbox.
  • getaccount (accountID As String) As String
    Get information about a user's account.
    The Event
    <code>Example:
    dbx.GetAccount("454365363464")</code>
  • getcurrentaccount As String
    Get information about the current user's account.
    <code>Example:
    dbx.GetCurrentAccount()</code>
  • getdelta (cursor As String, locale As String, includeMediaInfo As Boolean) As String
  • getdownloadlink (path As String) As String
  • getfoldermetadata (SharedFolderID As String, IncludeMembership As Boolean) As String
    Returns shared folder metadata by its folder ID.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • getlatestcursor (path As String, recursive As Boolean) As String
    A way to quickly get a cursor for the folder's state.
    Unlike list_folder, list_folder/get_latest_cursor doesn't
    return any entries. This endpoint is for app which only
    needs to know about new files and modifications and doesn't
    need to know about files that already exist in Dropbox.
  • getmetadata (path As String) As String
    Returns the metadata for a file or folder.
  • getpreview (path As String) As String
    Get a preview for a file. Currently previews are only
    generated for the files with the following extensions:
    .doc, .docx, .docm, .ppt, .pps, .ppsx, .ppsm,
    .pptx, .pptm, .xls, .xlsx, .xlsm, .rtf
  • getrevisions (path As String, revlimit As Int) As String
    Return revisions of a file
  • getsharedlinks (path As String) As String
    Returns a list of LinkMetadata objects for this user,
    including collection links.
    If no path Is given Or the path Is empty, returns a
    list of all shared links For the current user,
    including collection links.
    If a non-empty path Is given, returns a list of all
    shared links that allow access To the given path.
    Collection links are never returned in this Case.
    
    Note that the url field in the response Is never the shortened URL.
  • getsharefilelink (path As String) As String
  • getspaceusage As String
    Get the space usage information for the current user's account.
    <code>Example:
    dbx.GetSpaceUsage()</code>
  • getthumbnail (path As String, format As String, size As String) As String
    Gets a thumbnail for an image.
    Parameters
    format - jpeg (default) Or png.
    For images that are photos, jpeg should be preferred,
    While png Is better For screenshots And digital art.
    
    size One of the following values (default: s):
    value dimensions (px)
    xs 32x32
    s 64x64
    m 128x128
    l 640x480
    xl 1024x768
  • geturljob (JobID As String) As String
  • getversion As String
  • initialize (CallbackModule As Object, EventName As String, AccessToken As String, debug As Boolean) As String
    Initialize the Dropbox Class.
    Parameters
    CallbackModule
    EventName
    AccessToken
    debug
    <code>Example:
    dbx.GetAccount("454365363464")</code>
  • listfolder (path As String) As String
    Returns the contents of a folder.
  • listfoldercontinue (cursor As String) As String
  • listfoldermembers (SharedFolderID As String) As String
    Returns shared folder membership by its folder ID.
    Warning: This endpoint is in beta and is subject to
    minor but possibly backwards-incompatible changes.
  • listfoldermemberscontinue (cursor As String) As String
  • listfolders As String
  • listfolderscontinue (cursor As String) As String
    Once a cursor has been retrieved from list_folder_members,
    use this to paginate through all shared folder members.
    
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • logversioninfo As String
  • mount_folder (SharedFolderID As String) As String
    The current user mounts the designated folder.
    Mount a shared folder For a user after they have
    been added As a member. Once mounted, the shared
    folder will appear in their Dropbox.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • move (fromPath As String, toPath As String) As String
    Move a file or folder to a different location in
    the user's Dropbox.
    If the source path Is a folder all its contents
    will be moved.
  • relinquish_folder_membership (SharedFolderID As String) As String
    The current user relinquishes their membership
    in the designated shared folder and will no
    longer have access to the folder. A folder
    owner cannot relinquish membership in their
    own folder.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • remove_folder_member (shared_folder_id As String, email As String, dropbox_id As String, leave_a_copy As Boolean) As String
    Allows an owner or editor (if the ACL update policy
    allows) of a shared folder to remove another member.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • revokesharedlink (url As String) As String
    Revoke a shared link.
    This API Is only supported For full dropbox apps.
  • saveurl (url As String, destpath As String) As String
  • search (path As String, searchquery As String) As String
    Searches for files and folders.
  • sharefolder (Path As String, MemberPolicy As String, acl_update_policy As String, shared_link_policy As String, forceAsync As Boolean) As String
    Parameters:
    path String
    The path To the folder To share. If it does Not exist, Then a new one Is created.
    
    member_policy String
    MemberPolicy Who can be a member of this shared folder.
    Policy governing who can be a member of a shared folder.
    Only applicable To folders owned by a user on a team.
    The value will be one of the following datatypes.
    New values may be introduced As our API evolves.
    
    "team" Only a teammate can become a member.
    "anyone" Anyone can become a member.
    
    acl_update_policy String
    AclUpdatePolicy Who can add And remove members of this shared folder.
    Policy governing who can change a shared folder's access control
    list (ACL). In other words, who can add, remove, or change the
    privileges of members.The value will be one of the following
    datatypes. New values may be introduced as our API evolves.
    
    "owner" Only the owner can update the ACL.
    "editors" Any editor can update the ACL.
    This may be further restricted To editors on the same team.
    
    shared_link_policy String
    The policy To apply To shared links created For
    content inside this shared folder.
    Policy governing who can view shared links.The value
    will be one of the following datatypes. New values
    may be introduced As our API evolves.
    
    "anyone" Links can be shared with anyone.
    "members" Links can only be shared among
    members of the shared folder.
    
    force_async Boolean
    Whether To force the share To happen asynchronously.
    The default For this field Is False.
  • transfer_folder (SharedFolderID As String, toDropboxID As String) As String
    Transfer ownership of a shared folder to a
    member of the shared folder.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • unmount_folder (SharedFolderID As String) As String
    The current user unmounts the designated folder.
    They can re-mount the folder at a later time using
    mount_folder.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • unsharefolder (SharedFolderID As String, leaveacopy As Boolean) As String
    Allows a shared folder owner to unshare the folder.
    You'll need to call check_job_status to determine
    if the action has completed successfully.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • update_folder_member (shared_folder_id As String, email As String, dropbox_id As String, access_level As String, quiet As Boolean, custom_message As String) As String
    Allows an owner or editor of a shared folder to
    update another member's permissions.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • update_folder_policy (SharedFolderID As String, MemberPolicy As String, acl_update_policy As String, shared_link_policy As String) As String
    Update the sharing policies For a shared folder.
    Warning: This endpoint Is in beta And Is subject To
    minor but possibly backwards-incompatible changes.
  • upload (localpath As String, localFilename As String, dstpath As String, dstfilename As String) As String
    Create a new file with the contents provided
    in the request. Do Not use this To Upload a
    File larger than 150 MB. Instead, create
    an Upload session with UploadSessionStart.
  • uploadsessionstart (sessionMap As Map) As String

First we need to initialize the Class

dbx.Initialize(Me,"DropBox","access_token",True)

If you want to use the class just "with your dropbox" then you can create a access_token in the Dropbox App console.

You can find an example of not using pre-created access_token in Post #45 of this thread.. It is using the OAuth2 Flow to get access to a users Dropbox.

In order they are listed on the Previewdocumentation site i´ll post Examples (or just description on how to) for each of the used endpoints.

dbx.GetAccount("dbid:AAB2cfhttqMg1RjLLRlFzYWWoY6lUpWKsKo")
' Event
Sub DropBox_Account(meta As Map)
    Log("Dropbox_Account: "&meta)
End Sub

Get information about a user's account. In this case it wil get informations about MY (DonManfred) dropboxaccount.

dbx.GetCurrentAccount
' Event
Sub DropBox_CurrentAccount(meta As Map)
    Log("Dropbox_CurrentAccount: "&meta)
End Sub

Get information about the current user's account. It will result in giving YOUR (the developer) account.

dbx.GetSpaceUsage

' Event
Sub DropBox_SpaceUsage(space As Map)
    Log($"DropBox_SpaceUsage(${space})"$)
End Sub

Get the space usage information for the current user's account.

dbx.GetMetadata("/b4arulez.gif")

' Event
Sub DropBox_MetaData(meta As Map)
    Log("Dropbox_MetaData: "&meta)
End Sub

Returns the metadata for a file or folder.

dbx.Listfolder("/Export")
' dbx.ListfolderContinue is called from the result-sub
' automatically if there are more results

' Event
Sub DropBox_ListFolder(meta As Map)
    Log("Dropbox_Listfolder: "&meta)
    Dim cursor As String = meta.Get("cursor")
    Dim has_more As String = meta.Get("has_more")
    Dim entries As List = meta.Get("entries")
    For Each colentries As Map In entries
        Dim path_lower As String = colentries.Get("path_lower")
        Dim name As String = colentries.Get("name")
        filelistfolder.Add(name)

        Dim tag As String = colentries.Get(".tag")
    Next
    If has_more = True Then
        dbx.ListfolderContinue(cursor)
    Else
        Log("No more files")
        Log($"FilesInFolder(${filelistfolder.Size})"$)
        For i = 0 To filelistfolder.Size-1
            LogColor(filelistfolder.Get(i),Colors.Yellow)
        Next
        Dim resulting_files As List = WildCardFilesList(filelistfolder,"*.csv",True,True)
        For i = 0 To resulting_files.Size-1
            LogColor(resulting_files.Get(i),Colors.Green)
        Next

        'kvs.PutObject("filelistfolder", filelistfolder)
    End If

End Sub

Returns the contents of a folder.
NOTE (from Dropbox): We're definitely going to streamline this interface.

dbx.GetLatestCursor("/",False)

' Event
Sub DropBox_LatestCursor(meta As Map)
    Log("DropBox_LatestCursor()")
    Dim cursor As String = meta.Get("cursor")
    longpollcursor = cursor
    kvs.PutSimple("longpollcursor",cursor)
    Log("longpollcursor set: "&cursor)
End Sub

A way to quickly get a cursor for the folder's state. Unlike list_folder, list_folder/get_latest_cursor doesn't return any entries. This endpoint is for app which only needs to know about new files and modifications and doesn't need to know about files that already exist in Dropbox.

dbx.Download("/9-patch-assets.zip",File.DirDefaultExternal,"9patch.zip")


' Event is missing as yet.

Download a file from a user's Dropbox.
As i´m writing this forumpost i see that this method is missing a event when finished. It is working and saving the file as you can see it in the logs but the event is missing. TODO

    Dim session As Map
    session.Initialize
    session.Put("srcpath","/storage/emulated/0/Download")
    session.Put("srcfile","20150716151904894.pdf")
    session.Put("dstpath","/Export")
    session.Put("dstfile","20150716151904894.pdf")
    session.Put("offset",0)
    session.Put("packetsize",16384)
    dbx.UploadSessionStart(session)
' This is raising multiple events.
Sub DropBox_UploadSessionStatus(session As Map)
    Dim pro As Double = session.Get("offset")/(session.Get("filesize")/100)
    Label1.Text = session.Get("offset")&" / "&session.Get("filesize")&" -> "&pro
End Sub
Sub DropBox_UploadSessionFinish(session As Map)
    Log("DropBox_UploadSessionFinish()")
    Log(session)
End Sub

Start a new upload session. This is used to upload a single file with multiple calls. I´ve tried it with files up to 20mb but should work with 500mb as well.

dbx.Upload(extsdcard,"app-release.apk","/","app-releaseTEST.apk")
' Event
Sub DropBox_FileUpload(meta As Map)
    Log("Dropbox_FileUpload: "&meta)

    Dim path As String = meta.Get("path_lower")
    Log("Path: "&path)
    Dim rev As String = meta.Get("rev")
    Log("Rev: "&rev)
    Dim name As String = meta.Get("name")
    Log("Name: "&name)
    Dim size As Int = meta.Get("size")
    Log("FileSize: "&size)
    Dim client_modified As String = meta.Get("client_modified")
    Dim server_modified As String = meta.Get("server_modified")
    Log("ClientModified: "&client_modified)
    Log("ServerModified: "&server_modified)
End Sub

Create a new file with the contents provided in the request. Should only be used for small files. Maybe up to for example 2mb... It is using ONE httputilscall to transfer the file.

dbx.Search("","libmysql")
' Event
Sub DropBox_FileSearch(meta As Map)
    Log("Dropbox_FileSearch: "&meta)
End Sub

Searches for files and folders in your dropbox.

dbx.CreateFolder("/Export")
' Event
Sub DropBox_Createfolder(path As String,filename As String)
    Log($"DropBox_Createfolder(${path},${filename})"$)
End Sub

Create a folder at a given path.
No file or folder may exist at the path. The parent folder will be created if it does not already exist (and so on). If the parent exists it must be a folder (and the same for any ancestor). If an ancestor is a shared folder it must have write access.

dbx.delete(("/9-patch-assets.zip")
' Event

Delete the file or folder at a given path.
If the path is a folder all its contents will be deleted too.

    ' Copy a FILE
    ' Source and Destination should point to a file
    'dbx.copy("/Export/b4arulez.gif","/copyofb4arulez.gif")

    ' Copy a FOLDER
    'dbx.copy("/Export","/copyfoldertest")
    ' will resulting in creating a folder copyfoldertest
    ' and then all files from Export will be copied to copyfoldertest/

' Event
Sub Dropbox_copy(copyinfo As Map)
    Log($"DropBox_copy(${copyinfo})"$)
End Sub

If the path is a folder all its contents will be deleted too.

    ' Move  a FILE
    ' Move a FILE
    'dbx.move("/copyofb4arulez.gif","/newnameofb4arulez.gif")

    ' Move a FOLDER
    dbx.move("/copyfoldertest","/newdestfoldertest")

' Event
Sub Dropbox_move(moveinfo As Map)
    Log($"DropBox_copy(${moveinfo})"$)
End Sub

This method is NOT FINISHED as yet. DON´T USE it actually. TODO

  dbx.GetThumbnail("/2000likes.png","png","s")
   'Parameters
   'format jpeg (default) Or png. For images that are photos,
   ' jpeg should be preferred, While png Is better For screenshots And digital art.
  '
  ' size One of the following values (default: s):
  'value   dimensions (px)
  ' xs     32x32
  ' s       64x64
  ' m       128x128
  ' l       640x480
  ' xl     1024x768

' Event
Sub Dropbox_Thumbnail(thumb As Bitmap, Tag As Object)
   Log($"DropBox_Thumbnail(${Tag})"$)
   iv1.Bitmap = thumb
End Sub

Get a thumbnail for an image.

dbx.GetRevisions("/B4A/LibMySQL/MySQLExample.zip",100)
' Event
Sub DropBox_Revisions(revlist As Map)
   Log("DropBox_Revisions()")
   Log(revlist)
   Dim is_deleted As String = revlist.Get("is_deleted")
   Dim entries As List = revlist.Get("entries")
   For Each colentries As Map In entries
     Dim path As String = colentries.Get("path_lower")
     Dim revision As String = colentries.Get("rev")
     Dim name As String = colentries.Get("name")
     Dim client_modified As String = colentries.Get("client_modified")
     Dim size As Int = colentries.Get("size")
     Dim server_modified As String = colentries.Get("server_modified")
     Log($"FileRev(${path}):${revision}->${size} "$)
   Next


   'kvs.PutSimple("longpollcursor",cursor)
End Sub

Return revisions of a file

Update:: August, 20th, 2017
If you want to use Dropbox to connect to the USERS Dropbox (not YOURS) then you should look at the DropboxV2-OAuth2.zip example. It shows the way on how to get an Axccesstoken using the V2 endpoints.


The following methods are missing totally as yet: TODO

- Restore

TODO:

-

Dependencies:
- httputils2 (okHTTP)
- JSON
- RandomAcessFile
- KeyValueStore (used in example but not really needed by the class or Library)


This Class is open source and free to used and extended by anyone!

If you want to donate for my work building the class you can do it here:

 

[RafaelC]

Don,
Ok. I'll go once more around this post. Of course I did it before (not only this post but several other in the forum). But I'll try again

No; Of course I am not using both ICR1 and ICR2 on the same App. I just tried it compiling everytime a different App.

Thank you for your comments

 

[DonManfred]

Thank you for your comments

One more comment:

You are downloading the file in your sample to the ASSETS folder (files folder) of your app. The files-folder is readonly.
You should download to a different folder

 

[RafaelC]

Thanks. I am downloading to the external SDCard. And they download well when I use the Dropbox Generated Token. I understood that it was only allowed to write to the subfolders of your App in the SDCard. Maybe I was wrong.

 

[DonManfred]

BTW: Have you seen this? https://www.b4x.com/android/forum/threads/beta-dropbox-sdk-v2-java.74019/

This is a complete new wrapper for the java dropbox sdk V2...

It is not finished as of now (but it will be finished this year i guess) but you already can do a lot of things. Even Up- and downloading. But most of the methods are not tested as of now. Just did the coding so far in the last days...

At the end it will be much more complete than this http Dropbox Class.

Maybe you want to contribute to this lib (testing)... I´ll give priorized support on the java lib against this one here.

 

[RafaelC]

Yes DO; I'll be glad to contribuye to test this library. Elthough my requirements with Dropbox are very basic and I myself am just a newby with limited experience en Android and Java. But I'll do what a I can. Thanks

 

[Descartex]

Does anyone make this work on B4i???
Thank you!

 

[DonManfred]

Please create a new thread for your question.

If B4I does have a compatible okhttp module then you should be able to adapt the class-source to use the B4I http module....

Edit: I´m not able to do as i don´t use/have B4i

 

[jpvniekerk]

I'm making backup files of the data used in an app, and use this library to copy these backup files to and from the user's Dropbox. After quite a bit of struggle I have everything working now: authentication, file upload, file delete, directory listing, file download, etc. I need some help/advice with some items though...

1) I would like to capture when each job is completed, but I am having difficulty with it. I just want to show a toast message when the upload or download is complete. Any tips on how to do this will be appreciated.

2) Every now and then I also see an unexpected error in the log "JobError: Conflict", but it doesn't seem to affect the app at all - everything works even when I get this error. I have no idea what is causing this - I just don't like things giving me errors!

3) When the app exits, I make an automatic backup. the local backup works, but the dropbox upload of the file does not happen, it gives this in the log: "Object context is paused. Ignoring CallSubDelayed: JobDone". All the dropbox instructions are given before the app closes, but the dropbox actions do not execute. Any idea how I can make this work?

Any help will be appreciated!

 

[DonManfred]

All the dropbox instructions are given before the app closes

But you did not wait for the result event get raised.... Wait for the result and THEN exit...

1) I would like to capture when each job is completed, but I am having difficulty with it. I just want to show a toast message when the upload or download is complete. Any tips on how to do this will be appreciated.

Upload, Download... they both give a Result-Event after it finishes. Show the Toast in this event

2) Every now and then I also see an unexpected error in the log "JobError: Conflict"

i never saw this problem/error. Don´t know what the problem is.

 

[jpvniekerk]

Thanks Manfred,
Now busy implementing the wait and execute... Must change a lot of the programming logic to accomplish it!

2) Every now and then I also see an unexpected error in the log "JobError: Conflict"

I found the culprit...
The program creates a folder on Dropbox, and this error shows if the folder already exists. I (wrongly) assumed that it will work the same as b4a that it will simply create the folder if it doesn't exist. It does no harm in the program execution, but it throws up an annoying toast message. This may scare the users. I've tried to initialize Dropbox with debug True or False - no difference. Is there any way I can prevent this toast message from showing?

 

[jpvniekerk]

I did the hard yards and first checked if the folder exists on Dropbox, and only create it if it doesn't exist. Error gone now. It's a long way around, but in the end it is the better option.

 

[DonManfred]

It's a long way around, but in the end it is the better option.

Aggree

 

[joazzz]

Thank you for providing your source.
Some bug fixes are needed.

Bug1:
Sub JobDone(Job As HttpJob)
...
If Job.Success Then
Dim res As String
'res=Job.GetString '<<<---large file download out of memory error
'Bug fixes (large file download OK)
If (Job.JobName <> "filedownload") And (Job.JobName <> "getthumbnail") Then
res=Job.GetString
end if
...

Bug2:
Sub Upload(localpath As String, localFilename As String, dstpath As String, dstfilename As String)
...
job.GetRequest.SetHeader("Dropbox-API-Arg", $"{"path":"${File.Combine(dstpath,dstfilename)}", "mode": "overwrite"}"$)

unicode filename error
java.lang.IllegalArgumentException:
Unexpected char 0xac00 at 10 in Dropbox-API-Arg value: {"path":"/印刷.txt", "mode": "overwrite"}

'Bug Fix
Dim StrUniEsc As String = UnicodeEscape(File.Combine(dstpath,dstfilename))
job.GetRequest.SetHeader("Dropbox-API-Arg", $"{"path":"${StrUniEsc}", "mode": "overwrite"}"$)


Sub Download(path As String, destpath As String, destfile As String)
.....
' job.GetRequest.SetHeader("Dropbox-API-Arg", $"{"path":"${path}"}"$)
'Bug Fix
Dim StrUniEsc As String = UnicodeEscape(path)
job.GetRequest.SetHeader("Dropbox-API-Arg", $"{"path":"${StrUniEsc}"}"$)


HTTP header "Dropbox-API-Arg": could not decode input as JSON
https://www.dropboxforum.com/t5/API...ot-could-not-decode-input-as/m-p/195155#M8876

https://www.b4x.com/android/forum/threads/help-to-convert-from-unicode.32402/
Sub UnicodeEscape (s As String) As String
Dim sb As StringBuilder
sb.Initialize
For i = 0 To s.Length - 1
Dim u As String = Bit.ToHexString(Asc(s.CharAt(i)))
sb.Append("\u")
For i2 = 1 To 4 - u.Length
sb.Append("0")
Next
sb.Append(u)
Next
Return sb.ToString
End Sub

Bug3:
[beta] Dropbox SDK V2 - Java : bug : delete error message


Etc..
dbxAuth : Login Activity Form
'*Prevent : Login Textbox hidden below keyboard
Sub Globals
Private www As WebView
Dim Ime1 As IME
End Sub
Sub Activity_Create(FirstTime As Boolean)
Ime1.Initialize("EvtIme")
Ime1.AddHeightChangedEvent
End Sub
Sub EvtIme_HeightChanged(NewHeight As Int, OldHeight As Int)
www.Height=NewHeight '(www ->WebView1)
End Sub