Share image with hastag

Hi guys, This is android platform game, I creating the game which contain share option now in my game I can share images after taking screenshots. In that share content I have to add a default title and caption. For eg. I taken high score so I decided to share my image, I took screenshot and share into Facebook and more, now the user have to type title for the image, instead of I have to give the title pre-definedly for eg. #SuperContest. Is there any option to achieve this task. so far I created script for taking screenshots and sharing the screenshot in android method.

Try

 wwwForm.AddField("message", "Your Message with #tag");

add this before calling FB.API

You can’t post pre-set text to Facebook… New policies.