Hi,
I have done an exact implementation as your requirement states, please check the below app to see a real time demo as how the implementation works, on the first instance you have to signin and once the app is authorized to your twitter account you will be able to send your tweets. This has been done using twitter4j.
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I am sure you must have created your new app under your dev account, if not you can do it from the below link and pass on your credentials to me.
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Looking forward for your reply, and wishing you good luck in case I dont hear back from you.
Regards
Alfred