java - Add a character in an EditText -


i need add character "s" right after last written number in edittext (oe) so:

if write number : "123", must send "123s" instead. if write "1234", must send "1234s" instead.

how ?

my code: 

((button) findviewbyid(r.id.btn_write_hrm_noty)).setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v)          {             str = oe.gettext().tostring();             str = str.substring(0, 0) + "g" + str.substring(0, str.length());             mservice.enablehrnotification(mdevice, str);         }     });

i'm little confused. asking how add character string? if so: str+='s'; work. add string edittext .settext(str) or put notification 's' added (as blundell suggested).


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