EditText "," when input is displayed

1. Customizing the EditText control public class divisionedittext extends edittext {     /*  length of each group  */    private Integer length = 3;     /*  separators  */    private String delimiter =  ",";     private String text =  "";    public  Divisionedittext (Context context)  {        super (Context);         init ();     }    public  divisionedittext (context context, attributeset attrs)  {         super (Context, attrs);         init ();     }    public divisionedittext (Context context,  attributeset attrs, int Defstyle)  {        super (Context, attrs, defstyle);         init ();     }    /**   Get each group number  */    public integer getlength ()  {         return length;    }    /**  Set number of  */    public void setlength per group (integer length)  {         this.length = length;    }     /**  Get spacer  */    public string getdelimiter ()  {         return delimiter;    }    /**   Set the spacer  */    public void setdelimiter (string delimiter)  {         this.delimiter = delimiter;    }    public  string getinputtext ()  {        return  Super.gettext (). toString (). Replace (Getdelimiter (),  "");     }    / **     *  initialization      */    public  Void init ()  {        //  content change monitoring          this.addtextchangedlistener (New divisiontextwatcher ());         //  Get focus Monitoring          This.setonfocuschangelistener (New divisionfocuschangelistener ());    }     /**     *  Text Monitoring      *      *  @author  administrator     *     */    private class  divisiontextwatcher implements textwatcher {        @ Override        public void aftertextchanged (Editable s )  {        }        @ Override        public void beforetextchanged (CharSequence  s, int start, int count,                                        int after)  {         }         @Override          public voId ontextchanged (Charsequence s, int start, int before,int count)  {             //  Statistic Number              int len = s.length ();             if  (Len < getlength ())//  length is less than the required number                  return;             if  (count > 1)  {                 return;             }             //is inverted first, then inverted back              text = inversiOnstring (Formatsymbol (inversionstring (s.tostring ()));//Key points              settext (text);             SetSelection (Text.length ());        }    }     /**    *  If so, remove it first, and then add     */   after calculation     private string formatsymbol (STRING&NBSP;STR)  {         char[] chars = str.replace (Getdelimiter (),  ""). ToCharArray ();         stringbuffer sb = new stringbuffer ();                 for  (int  i = 0; i < chars.length; i++)  {             if  (I % geteachlength ()  == 0 && i != 0)//  Each time you traverse to a multiple of 4, add a space             {                 sb.append (GetDelimiter ());                 sb.append (Chars[i]) ;//  adding characters             } else {                 sb.append (Chars[i]) ;//  adding characters             }         }                return sb.tostring ();    }    /**      *  Reverse String *&NBsp;    *  @param  str     *  @return       */    private string inversionstring (STRING&NBSP;STR)  {         char[] chars = str.tochararray ();         stringbuffer sb = new stringbuffer ();         for (int i= 0; i < chars.length; i++)  {            sb.append (chars[chars.length &NBSP;-&NBSP;I&NBSP;-&NBSP;1]);        }                 return sb.tostring ();     }    /**     *  Get Focus Monitor      *      *&nbSP; @author  Administrator     *     */     private class divisionfocuschangelistener implements onfocuschangelistener {          @Override          Public void onfocuschange (View v, boolean hasfocus)  {             if  (Hasfocus)  {                 //  Set Focus                  setselection (GetText (). toString (). Length ());             }         }    } }

EditText "," when input is displayed