Remove brackets [] from a list set to a textview?

Yes, its because of the List. You have to Options:
Subclass whatever TextList is, and override toString() or

String temp = textList.toString();
text = temp.subString(1, temp.size() -2);

Using regex to replace the leading and trailing brackets, String.replace() doesn't work for the edge cases that the list's content contains brackets.

String text = textList.toString().replaceAll("(^\\[|\\]$)", "");

Replace:

text = textList.toString();

with:

text = textList.toString().replace("[", "").replace("]", "");

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