Add share page to the app

Avg Bid (USD)
Project Budget (USD)
$30 - $100

Project Description:
I need an Android expert to add share function to my app.
You should put the share button under every post.
After user click it new share page should open, where user can choose what to share: image, text + image, text and possibility to put his own post.
User can use any to share: facebook,, twitter, google+,
Example, if user shares with facebook, it asks to authorize once. Once user authorized, next time facebook doesn't ask to authorize again.
The same for google+, twitter,,

I have a variant how to share post, image. Please, look the screens.
If you can offer your variant, I will appreciate. I need as simpler as possible.

I will give you the source of the app.
After you finish your work you should prepare the document what changes in code did you do.
Example, open the file src/.../ find this .... replace with .... or find this .... add after ...

Skills required:
Android, Mobile Phone
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