Android：简单格式输入数字

我在学安卓。我有一个edittext来输入钱，如果我输入1000，结果必须是1.000，如果我输入1000000，结果必须是1.000.000

当我打字时，从最后到开始的每3个字符必须有一个“.”

像这样

    public class CurrencyFormatInputFilter implements InputFilter {

    Pattern mPattern = Pattern.compile("(0|[1-9]+[0-9]*)?(\\.[0-9]{0,2})?");

    @Override
    public CharSequence filter(
            CharSequence source,
            int start,
            int end,
            Spanned dest,
            int dstart,
            int dend) {

        String result = 
                dest.subSequence(0, dstart)
                + source.toString() 
                + dest.subSequence(dend, dest.length());

        Matcher matcher = mPattern.matcher(result);

        if (!matcher.matches()) return dest.subSequence(dstart, dend);

        return null;
    }

}

---

您可以使用InputFilter

public class CurrencyFormat implements InputFilter {

    Pattern mPattern = Pattern.compile("(0|[1-9]+[0-9]*)?(\\.[0-9]{0,2})?");

    @Override
    public CharSequence filter(CharSequence source, int start, int end,
            Spanned dest, int dstart, int dend) {

        String result = 
                dest.subSequence(0, dstart)
                + source.toString() 
                + dest.subSequence(dend, dest.length());

        Matcher matcher = mPattern.matcher(result);

        if (!matcher.matches()) return dest.subSequence(dstart, dend);

        return null;
    }
}

您可以设置如下过滤器：

editText.setFilters(new InputFilter[] {new CurrencyFormat()});

---

如果您觉得这有用，请接受它。

非常感谢您，让我在我的项目中尝试一下！非常感谢。祝你过得愉快，米歇尔

editText.setFilters(new InputFilter[] {new CurrencyFormat()});