Caesar cipher code app for android -

my question how can code 'space' empty space in coded text , because if enter text example abc'space'abc coded letters abc , instead of space # want empty space...and decode, reverse function if press space 7 want empty space..i don't want code space or decode him that's idea

public class mainactivity extends actionbaractivity {      textview mytext, mytext2;     button mycodebutton, mydecodebutton, deletebutton;     public static edittext enterededittext;     public string gettext;       @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          mytext = (textview) findviewbyid(r.id.textview1);         mytext2 = (textview) findviewbyid(r.id.textview2);         enterededittext = (edittext) findviewbyid(r.id.edittext1);         mycodebutton = (button) findviewbyid(r.id.button1);         mydecodebutton = (button) findviewbyid(r.id.button2);         deletebutton = (button) findviewbyid(r.id.button3);           code_my_textbutton();         decode_my_textbutton();          // clearing edit_texts , text_views         deleteclick();     }      public void code_my_textbutton()     {         mycodebutton.setonclicklistener(new onclicklistener() {              @override             public void onclick(view view) {                  caesar_cipher_coding_method();                 mytext2.settext("");             }         });     }      private void caesar_cipher_coding_method() {           int shift = 3;         editable msg = enterededittext.gettext();         string s = "";         int len = msg.length();         (int x = 0; x < len; x++) {             char c = (char) (msg.charat(x) + shift);             if (c > 'z' || (c > 'z' && c < 'd'))             {                 c -= 26;             }              s += c;         }         mytext.settext(s);     }       public void decode_my_textbutton()     {         mydecodebutton.setonclicklistener(new onclicklistener() {              @override             public void onclick(view view) {                 reverse_caesar_cipher_coding_method();              }         });     }      private void reverse_caesar_cipher_coding_method() {         int shift = -3;         editable msg = enterededittext.gettext();         string s = "";         int len = msg.length();         (int x = 0; x < len; x++) {             char c = (char) (msg.charat(x) + shift);             if (c < 'a' || (c < 'a' && c > 'w'))                 c += 26;             s += c;           }         mytext2.settext(s);         mytext.settext("");     }      // clearing edit_texts , text_views     public void deleteclick()     {         deletebutton.setonclicklistener(new onclicklistener() {              @override             public void onclick(view view) {                 enterededittext.settext("");                 mytext.settext("");                 mytext2.settext("");             }         });     }  } 

all have check in both loops so:

for (int x = 0; x < len; x++) {     if (character.iswhitespace(msg.charat(x))) {         s += " ";         continue;     }     char c = (char) (msg.charat(x) + 3);     if (c > 'z' || (c > 'z' && c < 'd')) {         c -= 26;     }      s += c; }