没有“$”符号的Android EditText钱输入正则表达式

Question

我想输入十进制数字，如“23.50”、“250.75”。下面的代码提供了这个，但它在数字前面放了一个“$”符号，比如“$23.50”、“$250.75”……我想删除美元符号并尝试了一些方法，但我不能。如何更改正则表达式和显示？

以下代码：

    inputAmount.setRawInputType(Configuration.KEYBOARD_12KEY);


    inputAmount.addTextChangedListener(new TextWatcher() {
        public void afterTextChanged(Editable s) {}
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

        public void onTextChanged(CharSequence s, int start, int before, int count) {
            if(!s.toString().matches("^\\$(\\d{1,3}(\\,\\d{3})*|(\\d+))(\\.\\d{2})?"))
            {
                String userInput= ""+s.toString().replaceAll("[^\\d]", "");
                StringBuilder cashAmountBuilder = new StringBuilder(userInput);

                while (cashAmountBuilder.length() > 3 && cashAmountBuilder.charAt(0) == '0') {
                    cashAmountBuilder.deleteCharAt(0);
                }
                while (cashAmountBuilder.length() < 3) {
                    cashAmountBuilder.insert(0, '0');
                }
                cashAmountBuilder.insert(cashAmountBuilder.length()-2, '.');
                cashAmountBuilder.insert(0,'$');

                inputAmount.setText(cashAmountBuilder.toString());
                // keeps the cursor always to the right
                Selection.setSelection(inputAmount.getText(), cashAmountBuilder.toString().length());

            }

        }
    });

Answer 1

  @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

            if(!s.toString().matches("^\\ (\\d{1,3}(\\,\\d{3})*|(\\d+))(\\.\\d{2})?$"))
            {
                String userInput= ""+s.toString().replaceAll("[^\\d]", "");
                StringBuilder cashAmountBuilder = new StringBuilder(userInput);

                while (cashAmountBuilder.length() > 3 && cashAmountBuilder.charAt(0) == '0') {
                    cashAmountBuilder.deleteCharAt(0);
                }
                while (cashAmountBuilder.length() < 3) {
                    cashAmountBuilder.insert(0, '0');
                }
                cashAmountBuilder.insert(cashAmountBuilder.length()-2, '.');
                cashAmountBuilder.insert(0, ' ');

                edAmountAddMoney.setText(cashAmountBuilder.toString());
                // keeps the cursor always to the right
                Selection.setSelection(edAmountAddMoney.getText(), cashAmountBuilder.toString().length());

            }
        }

我使用空格而不是 $，它对我有用