如何在EditText中用逗号分隔数字 [英] How to comma-separate numbers in EditText

问题描述

我有一个EditText，其inputType为 number .用户输入时，我想用逗号分隔数字.这是一个小例子:

I have an EditText that has an inputType of number. While the user is typing, I want to comma-separate the numbers. Here's a little illustration:

123将表示为123

123 would be represented as 123

1234将表示为1,234

1234 would be represented as 1,234

12345将表示为12,345

12345 would be represented as 12,345

...等等.

我尝试使用TextWatcher添加逗号，如下所示:

I tried adding a comma with TextWatcher as shown below:

    EditText edittext = findViewById(R.id.cashGiven);

    edittext.addTextChangedListener(new TextWatcher(){

        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            
        }

        @Override
        public void afterTextChanged(Editable editable) {
            editText.setText(separateWithComma(editText.getText().toString().trim()));
        }
    });

在此处粘贴separateWithComma()方法会使这个问题变得冗长，但随后它起作用了:我在Eclipse上对其进行了测试.我认为addTextChangedListener无法以这种方式工作，因为执行此操作时我的应用程序冻结(然后崩溃).

Pasting the separateWithComma() method here would make this question extra lengthy but then, it works: I tested it on Eclipse. I think the addTextChangedListener does not work this way because my app freezes (and then crashes much later) when I do this.

是否有更好的方法来实现这一目标?谢谢您的积极回应.

Is there a better way to achieve this? Thanks in anticipation for a positive response.

推荐答案

尝试使用String.format而不是现在的版本.

替换此:

Try to use String.format instead of what you have now.

Replace this:

editText.setText(separateWithComma(editText.getText().toString().trim()));

与此:

editText.setText(String.format("%,d", your number));

另一件事-您的应用程序可能会崩溃，因为每次在afterTextChanged内部调用setText()时，都会调用另一个afterTextChanged，并且基本上会创建一个无限循环.如果这是您的问题，您可以找到一个很好的解决方案

Another thing - your app may be getting this crash because every time that you are calling setText() inside afterTextChanged, another afterTextChanged is called and basically will create an infinite loop. If that is your problem you can find a good solution in here.

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