invoked 'android.accounts.Account com.owncloud.android.lib.common.OwnCloudAccount.getSavedAccount()' on a null object reference

[cs8898]

I thought i just have used the Sample code, but it seems that there are some issues...

Because i'm trying to get some ics files from the server i needed some webdav client but sardine-android isn't working... "Only WebDAV Client allowed" ;/

So i tried that lib included as com.github.owncloud:android-library:oc-android-library-0.9.24

The used Code:

        Uri serverUri = Uri.parse("https://SOMESERVER.TLD/owncloud/");
        OwnCloudClient mClient = OwnCloudClientFactory.createOwnCloudClient(serverUri, context, true);
        OwnCloudCredentials creds = OwnCloudCredentialsFactory.newBasicCredentials("USERNAME","PASSWORD");
        mClient.setCredentials(creds);
        try {
            ReadRemoteFolderOperation readFolder = new ReadRemoteFolderOperation("/");
            RemoteOperationResult<ArrayList<RemoteFile>> readResponse = readFolder.execute(mClient);
            Log.d("WEBDav",readResponse.getLogMessage());
            if(readResponse.getData() != null)
            for(RemoteFile file : readResponse.getData()){
                Log.d("RemoteFile",file.getRemotePath());
            }
...

Heyo here is my Log:

Synchronized /: Unexpected exception
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.accounts.Account com.owncloud.android.lib.common.OwnCloudAccount.getSavedAccount()' on a null object reference
        at com.owncloud.android.lib.common.OwnCloudClient.getUserFilesWebDavUri(OwnCloudClient.java:263)
        at com.owncloud.android.lib.resources.files.ReadRemoteFolderOperation.run(ReadRemoteFolderOperation.java:79)
        at com.owncloud.android.lib.common.operations.RemoteOperation.runOperation(RemoteOperation.java:252)
        at com.owncloud.android.lib.common.operations.RemoteOperation.execute(RemoteOperation.java:215)

[davigonz]

Hi @cs8898 , as you can see in your Log, you can not use the remote operations with no account, so using OwnCloudClientFactory.createOwnCloudClient is not enough. I would recommend you to use something like:

Account account = new Account("name", "type") OwnCloudAccount ocAccount = new OwnCloudAccount(account, context); OwnCloudClientManagerFactory.getDefaultSingleton().getClientFor(ocAccount, context);

By using this, you will obtain an OwnCloudClient with a proper account and it should work.

[cs8898]

Thanks I will try that some day, currently i moved to Sardine-Android... They also support direct InputStreams what is pretty great in my case.

[DanielKedl]

@davigonz I have the same problem, and I don't understand your solution. I already have a working owncloud account. So I just updated the values for: server_base_url, username, password - with the exact values I use in the browser. So the sample should work with that, right? I also tried with https://demo.owncloud.com/, demo, demo. Also not working.

In the sample app, the client is set with:

OwnCloudClient createOwnCloudClient(Uri uri, Context context, boolean followRedirects)

How can this work? getSavedAccount() can only be null, cause it was never set, right? See the constructor:

public OwnCloudAccount(Uri baseUri, OwnCloudCredentials credentials) {
       if (baseUri == null) {
           throw new IllegalArgumentException("Parameter 'baseUri' cannot be null");
       }
       mSavedAccount = null;
       mSavedAccountName = null;
       mBaseUri = baseUri;
       mCredentials = credentials != null ?
               credentials : OwnCloudCredentialsFactory.getAnonymousCredentials();
       String username = mCredentials.getUsername();
       if (username != null) {
           mSavedAccountName = AccountUtils.buildAccountName(mBaseUri, username);
       }
   }

mSavedAccountName is set, but mSavedAccount never.

And in your solution, where would the client get my credentials from?

[hakeem91]

Hello ! I have the same problem with the getSavedAccount(). Any solutions ?

[davigonz]

How can this work? getSavedAccount() can only be null, cause it was never set, right? See the constructor:

@DanielKedl the error reported in the first comment is not about getting a null account when calling getSavedAccount() but trying to call getSavedAccount() from a null account, is not the same. Have a look at the logs:

java.lang.NullPointerException: Attempt to invoke virtual method 'android.accounts.Account com.owncloud.android.lib.common.OwnCloudAccount.getSavedAccount()' on a null object reference
        at com.owncloud.android.lib.common.OwnCloudClient.getUserFilesWebDavUri(OwnCloudClient.java:263)

And this occurs when you try to perform a network operation with a client without an account, as I explained in https://github.com/owncloud/android-library/issues/239#issuecomment-466339456

And in your solution, where would the client get my credentials from?

It would get your credentials from the account you use

https://github.com/owncloud/android-library/blob/24111a95d52204f81b61b178213dc5118b2015a3/owncloudComLibrary/src/main/java/com/owncloud/android/lib/common/SingleSessionManager.java#L78

But for that you might need to use a different constructor and create the credentials yourself.

https://github.com/owncloud/android-library/blob/24111a95d52204f81b61b178213dc5118b2015a3/owncloudComLibrary/src/main/java/com/owncloud/android/lib/common/OwnCloudAccount.java#L91

[JurajBegovac]

Hi, same issue here.

This is how I setup ownCloudClient

val ownCloudClient = OwnCloudClientFactory.createOwnCloudClient(Uri.parse(baseUrl), appContext, true)
ownCloudClient.credentials = OwnCloudCredentialsFactory.newBasicCredentials(username, password)

Above code works with this version: oc-android-library-0.9.15 but it doesn't work with 1.0.3:

2019-11-28 17:45:24.074 23808-23930/ch.arcade.cloudcam.new E/ReadRemoteFolderOperation: Synchronized /: Unexpected exception
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.accounts.Account com.owncloud.android.lib.common.OwnCloudAccount.getSavedAccount()' on a null object reference
        at com.owncloud.android.lib.common.OwnCloudClient.getUserFilesWebDavUri(OwnCloudClient.java:254)
        at com.owncloud.android.lib.resources.files.ReadRemoteFolderOperation.run(ReadRemoteFolderOperation.java:78)
        at com.owncloud.android.lib.common.operations.RemoteOperation.runOperation(RemoteOperation.java:251)
        at com.owncloud.android.lib.common.operations.RemoteOperation.run(RemoteOperation.java:270)