Formatting the Strings into blocks in EditTExt . Usable for Credit Card Number :).

SignupField.java

boolean splitFlag = true;
                            String splitBlock[] = copyTextField.getText().toString().split(" ");
                            for (int j = 0; j < splitBlock.length; j++) {
                                if (splitBlock[j].length() > 4) {
                                    splitFlag = false;
                                }
                            }
                            if (splitFlag) {
                                copyTextField.setOnKeyListener(new View.OnKeyListener() {

                                    @Override
                                    public boolean onKey(View v, int keyCode, KeyEvent event) {

                                        if (keyCode == KeyEvent.KEYCODE_DEL) {
                                           keyDel = 1;
                                        }
                                        return false;
                                    }
                                });

                                if (keyDel == 0) {

                                    if (((copyTextField.getText().length() + 1) % 5) == 0) {

                                        if (copyTextField.getText().toString().split(" ").length <= 3) {
                                            copyTextField.setText(copyTextField.getText() + " ");
                                            copyTextField.setSelection(copyTextField.getText().length());
                                        }
                                    }
                                    a = copyTextField.getText().toString();
                                } else {
                                    a = copyTextField.getText().toString();
                                    keyDel = 0;
                                }

                            } else {
                                copyTextField.setText(a);
                            }