android - Validating a Dialog EditText using .contains and \\W -


i have ontextchangedlistener watches edittext see if contains "non-word" characters so;

input.addtextchangedlistener(new textwatcher() {         public void aftertextchanged(editable s) {}         public void beforetextchanged(charsequence s, int start, int count, int after) {}         public void ontextchanged(charsequence s, int start, int before, int count) {             if (input.gettext().tostring().contains("\\w")) {                 input.seterror("error");             }             else{              }          }});

however code not seem recognise ("\\w") non-word characters. have used check other edittexts in instances replaces non-word characters without prompting works fine;

string locvalidated = textlocation.gettext().tostring().replaceall("\\w", "-");

it seem cannot use \\w check if edittext contains such characters, replace them. there workaround this?

string.contains() not check regular expressions. in case, checking string "\w". simple (sub-)string compare.

a workaround is

string s = input.gettext().tostring(); boolean hasnonword = !s.equals(s.replaceall("\\w", "x"));

so, in case:

public void ontextchanged(charsequence s, int start, int before, int count) {     string s = input.gettext().tostring();     if (!s.equals(s.replaceall("\\w", "x"))) {         input.seterror("error");     } else {         input.seterror(null);     } }

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