Dropbox Sync Library

stefanoa · Oct 22, 2013

Erel said:
This means that the activity was not running when the event was raised. The event will be executed when the activity resumes.

You can use a service instead. Services are not paused like activities (and are easier to work with).

Thanks

stefanoa · Oct 23, 2013

Caused by: java.lang.NullPointerException
at anywheresoftware.b4a.dropbox.DbxAccountManagerWrapper.LinkAccount(DbxAccountManagerWrapper.java:89)

i use this function in two version of same app (free and full), without differences.
In free version it work, but in full (same form, same function, same dropbox key) i get this error. I can use same key and secret for two app, right?

Any ideas?

Code: Copy

DropboxManager.Initialize(key, secret, "dropboxmanager")
...
DropboxManager.LinkAccount
....

** Activity (menu) Resume **
** Activity (menu) Pause, UserClosed = false **
** Activity (utilities) Create, isFirst = true **
** Activity (utilities) Resume **
** Service (mlbbackupdbx) Create **
** Service (mlbbackupdbx) Start **

mlbbackupdbx_backupdb_dropbox (java line: 193)

java.lang.RuntimeException: java.lang.NullPointerException
at anywheresoftware.b4a.dropbox.DbxAccountManagerWrapper.LinkAccount(DbxAccountManagerWrapper.java:91)
at bloomob.mylifebook.mlbbackupdbx._backupdb_dropbox(mlbbackupdbx.java:193)
at bloomob.mylifebook.mlbbackupdbx._service_start(mlbbackupdbx.java:273)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:170)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:154)
at bloomob.mylifebook.mlbbackupdbx.handleStart(mlbbackupdbx.java:68)
at bloomob.mylifebook.mlbbackupdbx.onStartCommand(mlbbackupdbx.java:53)
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2060)
at android.app.ActivityThread.access$2800(ActivityThread.java:124)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1011)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3717)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at anywheresoftware.b4a.dropbox.DbxAccountManagerWrapper.LinkAccount(DbxAccountManagerWrapper.java:89)
... 19 more
java.lang.RuntimeException: Unable to start service bloomob.mylifebook.mlbbackupdbx@4050b1e8 with Intent { cmp=bloomob.mylifebook/.mlbbackupdbx }: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.NullPointerException

at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2073)
at android.app.ActivityThread.access$2800(ActivityThread.java:124)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1011)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3717)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.NullPointerException
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:196)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:154)
at bloomob.mylifebook.mlbbackupdbx.handleStart(mlbbackupdbx.java:68)
at bloomob.mylifebook.mlbbackupdbx.onStartCommand(mlbbackupdbx.java:53)
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2060)
... 10 more
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
at anywheresoftware.b4a.dropbox.DbxAccountManagerWrapper.LinkAccount(DbxAccountManagerWrapper.java:91)
at bloomob.mylifebook.mlbbackupdbx._backupdb_dropbox(mlbbackupdbx.java:193)
at bloomob.mylifebook.mlbbackupdbx._service_start(mlbbackupdbx.java:273)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:170)
... 14 more
Caused by: java.lang.NullPointerException
at anywheresoftware.b4a.dropbox.DbxAccountManagerWrapper.LinkAccount(DbxAccountManagerWrapper.java:89)
... 19 more
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (menu) Create, isFirst = true **

Erel · Oct 23, 2013

I was actually mistaken. You can only call LinkAccount from an Activity. This call can show a dialog and therefore cannot be called from a service.

You can still use it from the service. Just this call should be done from the activity.

Claude Brun · Nov 6, 2013

Hello,
At first one thank you for your software Basic4Android. It is really brilliant.
Excuse for my English which is not very good.

I wrote an app which uses the functions of the bookshop Dropbox Sync. It works well, but I have 2 problems:
- When a file already exists on dropbox and when I make an upload, the new version does not crush the old one on dropbox
- I do not know how to delete a file on dropbox since my application Thank you in advance for your help

Erel · Nov 6, 2013

1. The file should be updated. It may take a few minutes if it is a large file.

2. Currently it is not possible to delete a Dropbox file.

Claude Brun · Nov 6, 2013

Thanks,
Indeed the file is updated well. It is necessary to wait a little

albgreco · Nov 10, 2013

Hello,
I succeded in installing the Dropbox library. However, it works only if I use manager.UnlinkAccount before linkAccount as in the code below:

Sub Activity_Create(FirstTime As Boolean)
manager.Initialize(key, secret, "manager")
manager.UnlinkAccount
manager.linkAccount
Dim success As Boolean
Dim xyz
xyz=Manager_AccountReady(success)
If success Then
manager.uploadFile("/", Main.nomedatabase, File.DirRootExternal, Main.nomedatabase)
StartActivity (Main)
Else
Msgbox("Dropbox connection failed","")
End If
StartActivity (Main)
End Sub

So it works only once (and correctly synchronizes my database), unless I unlink the account every time, and as I understood this is not the correct procedure.

Any help? Thank you

Erel · Nov 11, 2013

See the example code in post #1. You should initialize Manager when FirstTime is True and only link it once.

albgreco · Nov 11, 2013

Erel said:
See the example code in post #1. You should initialize Manager when FirstTime is True and only link it once.

Thanks. But this means that I should unlink also at FirstTime, before initialize and link account? if I try to just initialize and link, I don't get success when calling Manager_AccountReady.
So the Dropbox screen (asking for consent to Dropbox file access authorization) should normally be invoked at every program execution/restart?

Erel · Nov 11, 2013

You should initialize it once when FirstTime is True.

Do you want to link the account immediately when your app starts?

albgreco · Nov 11, 2013

Erel said:
You should initialize it once when FirstTime is True.

Do you want to link the account immediately when your app starts?

Perhaps I don't understand properly what "linking the account" means. I supposed that the Dropbox dialog for "file access consent" should appear only once in the life of a particular device, after it had been linked to Dropbox, not every time the app starts. Perhaps I was mistaken because PC Dropbox is "machine-based", not "app-based".

So my question is: what happens after the first linking (i.e.: answering Yes, I consent file access)? how long is Dropbox supposed to remember this linking? So there is really need to Unlink the account every time the app starts before linking? (see capitalized comment in the code below)

Sub Activity_Create(FirstTime As Boolean)
If FirstTime Then
manager.Initialize(key, secret, "manager")
manager.UnlinkAccount 'IF THIS LINE IS MISSING IT DOES'NT WORK
manager.linkAccount
End If
Dim success As Boolean
Dim xyz
xyz=Manager_AccountReady(success)
If success Then
manager.uploadFile("/", Main.nomedatabase, File.DirRootExternal, Main.nomedatabase)
StartActivity (Main)
Else
Msgbox("Dropbox connection failed","")
End If
StartActivity (Main)
End Sub

Erel · Nov 12, 2013

Please use [ code ] [ /code ] tags (without spaces) when posting code.

I tried this code and it worked fine:

Code: Copy

Sub Activity_Create(FirstTime As Boolean)
   If FirstTime Then
     manager.Initialize("xxx", "yyy", "manager")
     manager.LinkAccount
   End If
   Activity.LoadLayout("1")
End Sub

Which error do you get when you don't call UnlinkAccount?

According to Dropbox documentation the user should only need to approve the link once.

albgreco · Nov 12, 2013

Erel said:
Please use [ code ] [ /code ] tags (without spaces) when posting code.

I tried this code and it worked fine:

Code: Copy

Sub Activity_Create(FirstTime As Boolean) If FirstTime Then manager.Initialize("xxx", "yyy", "manager") manager.LinkAccount End If Activity.LoadLayout("1") End Sub

Which error do you get when you don't call UnlinkAccount?

According to Dropbox documentation the user should only need to approve the link once.

If I install the app without UnlinkAccount, Manager_AccountReady does not return success. Yet, even if no success, changed files are automatically synchronized with Dropbox for a while. This works until the app is active (no device restart, no app reinstall).
When I reinstall the app (which is usual during program debugging) it does'nt work at all (no success, no synchro). In this case, to make it working again, Unlink is needed before linking.
It seems that I must resign and accept the Dropbox approving dialog every time the app restarts. Thank you again in any case for help.

a_carignan · Nov 17, 2013

What do you mean by "Copy the attached wrapper files to the libraries folder"?

Erel · Nov 17, 2013

Download the zip file and copy DropboxSync.xml and jar to the libraries folder. You will also need to download the Dropbox SDK.

a_carignan · Nov 17, 2013

how do I choose Sync API?

a_carignan · Nov 17, 2013

What XML file, there is not in the zip "dropbox-sync-android-sdk-2.0.3"?

Erel · Nov 17, 2013

a_carignan said:
how do I choose Sync API?

No need to be angry... There is a link to the wrapper at the bottom of the first post.

a_carignan · Nov 17, 2013

Tell you "Edit:. V1.20 released Works with DropBox SDK v2.0"?

Erel · Nov 17, 2013

Don't you see the link? Here is a screenshot:

Dropbox Sync Library

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