[Actifit Fitness Tracker] [0.3.1] Should not allow special character on tags

[sourovafrin]

Expected Behavior

I expected user won't be able to put any special characters in tags (except single -).

Actual Behaviour

On Actifit fitness tracker app user can add any special character in tags and also can publish it on steem blockchain. For this reason it creates a invalid tag on the post after posting.

Steps to Reproduce

• First of all install the app from google playstore
• Then you have to do some walking to make 1000 activity in the app
• After doing 1000 activity, click on POST TO STEEMIT to post on steem blockchain
• On username put your steemit username and on next field put your accounts private posting key.
• On activity type select any one of them.
• On the field of tags, put any tag with special character such as !@#$^*
• On Post Content write atleast 30 words and click on POST TO STEEMIT

Recordings of the Bug

https://youtu.be/rgW3s9dacrw

Post with the issue- https://steemit.com/actifit/@shrishmeyy/actifit-shrishmeyy-20180808t052803136z

Device : Huawei y9
Operating System : Android OREO(8.0.0)
App Version : 0.3.1