Android Question how can I detect if a string have a characters like this one ?

[Addo]

i have an app that client send some string input and store it in the database

but there are some annoying characters that has been sent from [a bad client]

These is the following characters and it can be increased how should I filter out this kind of chars?

here is the characters when it printed out in HTML it looks very annoying

ทืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืืื

 

[DonManfred]

use Regex to filter out non standard-characters