is there any Java sdk method to generate access token on the run by taking app key and app secret??

Hi Reshma ,

Every supported SDK do this automatically byself (without any additional method/function call). You just have to initialize your client object using refresh token instead of access token. 😉 That's it.

Hope this helps.

Thanks for the suggestion. I have created a Refresh token using this curl

curl https://api.dropbox.com/oauth2/token -d code=<receivedcode>-d grant_type=authorization_code -u <Appkey>:<Appsecret>

Then I have initialized/created drop box client object with Refresh token in place of access token

private static final String REFRESH_TOKEN = "<REDACTED_REFRESH_TOKEN> -u <REDACTED_APP_KEY>:<REDACTED_APP_SECRET>";

// Create drop box client

DbxRequestConfig config = DbxRequestConfig.newBuilder("dropbox/AppToCreateIT's").build();
DbxClientV2 client = new DbxClientV2(config, REFRESH_TOKEN);

But unfortunately this dint work, it is throwing below error
Invalid authorization value in HTTP header "Authorization": "Bearer <REDACTED_REFRESH_TOKEN> -u <REDACTED_APP_KEY>:<REDACTED_APP_SECRET>". Expecting "Bearer <oauth2-access-token>".

pardon If my understanding is wrong , could you please guide me with the exact steps to be followed? 

I have taken the below reference to create dropbox client. instead of access token I have used refresh token as per your suggestion

GitHub - dropbox/dropbox-sdk-java: A Java library for the Dropbox Core API.

Reshma As Здравко indicated, you cannot use a refresh token as an access token. Refresh tokens and access tokens serve different purposes and are not interchangeable. You can find examples of using the authorization flow in the Java SDK here. You can find an example of using a credential with a client to make call here.

Also, for future reference, do not publicly post your refresh token or app secret. I've redacted them from your post. You may want to revoke it for the sake of security.

the links are dead. Please update.

Thang2000 Thanks for letting us know! I've updated the links in my previous post.