android - Change the colour of text as the user types hash tags -

i working on application user can post content feed. in edit text (used composing) text colour grey. when user types hash tag e.g. #help need colour text black type, when user types '#' text must coloured black until start new word, text colour needs revert grey.

i have been trying using text watcher , spannable string colour.

here have done textwatcher ontextchanged

        @override         public void ontextchanged(charsequence s, int start, int before, int count) {               //remove text watcher prevent infinite             mtextfield.removetextchangedlistener(contentfieldwatcher);             string startchar = null;                 startchar = character.tostring(s.charat(start));                 l.i(getclass().getsimplename(), "character of new word: " + startchar);     if (startchar.equals("#")) {                      tagcheck(s.tostring().substring(start), start, start + count);                 }             } 

tagcheck method

private void tagcheck(string s, int start, int end) {         mspannable.setspan(new foregroundcolorspan(getresources().getcolor(r.color.black_colour)), start, end, spanned.span_exclusive_exclusive);     } 

mspannable spannable.

the problem method '#' shows startchar, when user types next character, either symbol or letter, shows startchar. if user typed santa - 's' remains startchar. issue i'm facing how dynamically colour text user types hashtag.

so plain letters work correctly, when use symbol not. hope question has clarity..i've been looking @ few days , it's getting hazy :)

i tried , found soloution

you can use following code

spannable mspanable; int hashtagiscoming = 0; @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);        final edittext edt = (edittext) findviewbyid(r.id.edittext1);      mspanable = edt.gettext();      edt.addtextchangedlistener(new textwatcher() {          @override         public void ontextchanged(charsequence s, int start, int before, int count) {              string startchar = null;              try{                 startchar = character.tostring(s.charat(start));                 log.i(getclass().getsimplename(), "character of new word: " + startchar);             }             catch(exception ex){                 startchar = " ";             }                  if (startchar.equals("#")) {                      tagcheck(s.tostring().substring(start), start, start + count);                      hashtagiscoming++;                 }                  if(startchar.equals(" ")){                     hashtagiscoming = 0;                 }                  if(hashtagiscoming != 0) {                     tagcheck(s.tostring().substring(start), start, start + count);                     hashtagiscoming++;                 }         }          @override         public void beforetextchanged(charsequence s, int start, int count,                 int after) {             // todo auto-generated method stub          }          @override         public void aftertextchanged(editable s) {             // todo auto-generated method stub          }     });    }   private void tagcheck(string s, int start, int end) {     mspanable.setspan(new foregroundcolorspan(getresources().getcolor(r.color.color)), start, end, spanned.span_exclusive_exclusive); }