Java android EditText中实时编辑的格式编号####

我正在从事Android项目。 我需要在实时编辑中格式化EditText中的数字

例如：

• 当我输入：1234时，它应该是1234
• 当我输入：0123时，它应该是0123

我现在拥有的东西不起作用：/，我已经将EditText设置为仅数字输入

editText.addTextChangedListener(new TextWatcher() {

                @Override
                public void afterTextChanged(Editable s) {
                    try {

                        //String str = s.toString();

                        //String str = String.format("%,d", s.toString()
                        //        .replaceAll(",", ""));
                        editText.removeTextChangedListener(this);
                        String str = s.toString().replaceAll(",", "");
                        String edit = "";
                        if(str.length()==2)
                        {
                            int pos = editText.getSelectionStart();
                            String firstChar = str.substring(0, 1);
                            String secondChar = str.substring(1, str.length()-1);
                            edit = firstChar+ "," +secondChar;  
                        }
                        else
                        {
                            edit = str;
                        }
                        editText.setSelection(edit.length());
                        editText.setText(edit);
                        editText.addTextChangedListener(this);
                    } catch (NumberFormatException e) {
                        e.printStackTrace();
                    }
                }
                public String doubleToStringNoDecimal(double d) {
                    DecimalFormat formatter = (DecimalFormat) NumberFormat.getInstance(Locale.US);;
                    formatter .applyPattern("#,###");
                    return formatter.format(d);
                }

                @Override
                public void beforeTextChanged(CharSequence c, int arg1, int arg2, int arg3) {
//                  String str = editText.getText().toString(); 
//                  len = str.length();
                }

                @Override
                public void onTextChanged(CharSequence s, int start, int before, int count) { 
//                  String str = editText.getText().toString();

                }


            });

---

您可以在代码中尝试此选项：

String num = "1234567";
num = new StringBuilder(num).reverse().toString().replaceAll("(\\d{3})", "$1,");
num = new StringBuilder(num).reverse().toString().replaceAll("^,|,$", "");
System.out.println(num);

输出：

1,234,567