For the interface I followed the authentication steps using OAuth 2.0. Thank you Malcolm for being the sponsor of this tutorial!
The test app can list the current user profile and the connections of the current user. The result will be provided in XML format.
Note: This app is for demo purposes only and does not have any official Linkedin relationship.
Important Note as of Feb, 12, 2015: LinkedIn to limit public developer access to its APIs, which means for the interface, the authentication still is working and you can get some basic profile information.
Tested successfully on Samsung Galaxy A5 running Android 8.
Updated version as of Nov 6th, 2019:
You can test with the apk file, which is available for download here: Download apk file
You can buy the source code of this project.
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I usually will send the download link not later than 24 hours after having received your payment.
Thank you! Taifun