android dynamically change style at runtime

Changing the style after creating the view is not supported .. so what you can do is:

1. create a new android xml file of type values
2. add new theme
3. add your elements to that theme and their values and save the file

Now, when you are dynamically creating the new view you call the constructor that will allow to define a defStyle. Then, you point to the style ID you have just created by pointing to R."the XML file name"."your style ID"

myTextView.setTextAppearance(getApplicationContext(), R.style.boldText);