Bank card Input Effect 4 plus a space

private static Final charKongge="';
PrivateTextwatcherTextwatcher=NewTextwatcher () {

    //before the changetextlength
 intBeforetextlength=0;
 //Change the text before
 PrivateCharsequenceBeforechar;
 //after the changetextlength
 intOntextlength=0;
 //Whether to change the space or cursor
 Booleanischanged=false;
 // record the position of the cursor
 int Location=0;
Private Char[]Tempchar;
PrivateStringBufferBuffer=NewStringBuffer ();
 //number of spaces already available
 intKonggenumberb=0;

 @Override
 Public voidbeforetextchanged(Charsequence s, intStart, intCount, intAfter) {
        Beforetextlength= S.length ();
if(Buffer. Length () >0) {
            Buffer. Delete (0, Buffer. Length ());
}
        Konggenumberb=0;
 for(inti =0; I < S.length (); i++) {
            if(S.charat (i) = ="') {
                Konggenumberb++;
}
}
}

    @Override
 Public voidontextchanged(Charsequence s, intStart, intBefore, intCount) {

        Ontextlength= S.length ();
 Buffer. Append (S.tostring ());
if(Ontextlength==Beforetextlength||Ontextlength<=3
||ischanged) {
            ischanged=false;
return;
}
        ischanged=true;

}

    @Override
 Public voidaftertextchanged(Editable s) {
        off(ischanged) {
             Location=yourcardnumed. Getselectionend ();
intindex =0;
 while(Index <Buffer. Length ()) {
                if(Buffer. charAt (Index) = =Kongge) {
                    Buffer. Deletecharat (Index);
}Else{
index++;
}
}
index =0;
intKONGGENUMBERC =0;
 while(Index <Buffer. Length ()) {
                off(Index = =4|| index = =9|| index = = -|| index = = +)) {
                    Buffer. Insert (Index, Kongge);
Konggenumberc++;
}
index++;
}
            if(Konggenumberc >Konggenumberb) {
                 Location+ = (KONGGENUMBERC-Konggenumberb);
}
            
            Tempchar=New Char[Buffer. Length ()];
 Buffer. GetChars (0, Buffer. Length (), Tempchar, 0);
String str =Buffer. ToString ();
if( Location> Str.length ()) {
                 Location= Str.length ();
}else if( Location<0) {
                 Location=0;
}

            yourcardnumed. SetText (str);
Editable etable =yourcardnumed. GetText ();
if( Location> -){
Toastutil.Toastshow("to enter at most -bit");
return;
}
            
Selection.setselection(etable,  Location);
           
 ischanged=false;
}
}

};

Bank card Input Effect 4 plus a space