1

首先，我知道双打并不是最好的货币，但在这种情况下，精度并不是非常重要。因此，我在 Play 商店中有一个实时应用程序，我发现欧元货币存在问题。出于某种原因，如果使用欧元本地化（无法使用 ADB 本地化重现），用户可以在 numberDecimal EditText 中输入逗号来分隔美元和美分。因此，当您期望从北美的用户那里获得“1000.00”时，您可能会从挪威的某个用户那里获得“1000,00”。

话虽这么说，numberDecimal 这样本地化并允许逗号是典型的吗？如果是这样，你知道它是否限制用户只插入最后一个逗号？我正在使用以下代码来解决此问题，如您所见，它依赖于它们只是一个逗号来替换：

 // Required to handle European use of commas instead of decimals places
    // in their currency.
    edittext_amount.addTextChangedListener(new TextWatcher() {
        public void afterTextChanged(Editable edittext_amount) {
            String amount = "";
            if (edittext_amount != null) {
                try {
                    amount = edittext_amount.toString().replace(",", ".");
                    double_edittext_amount = Double.parseDouble(amount);
                }
                catch (NumberFormatException e) {
                    // Error
                }
            }

        }

如前所述，上述代码是为了防止逗号产生错误，我收到的错误如下：

java.lang.NumberFormatException: Invalid double: "1000,00"
at java.lang.StringToReal.invalidReal(StringToReal.java:63)
at java.lang.StringToReal.parseDouble(StringToReal.java:269)
at java.lang.Double.parseDouble(Double.java:295)
at java.lang.Double.valueOf(Double.java:332)
at com.ootpapps.saving.made.simple.SavingsPlanEditor.validateSavingsPlan(SavingsPlanEditor.java:233)
at com.ootpapps.saving.made.simple.SavingsPlanEditor.access$1(SavingsPlanEditor.java:217)
at com.ootpapps.saving.made.simple.SavingsPlanEditor$2.onClick(SavingsPlanEditor.java:109)
at android.view.View.performClick(View.java:3644)
at android.view.View$PerformClick.run(View.java:14313)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4517)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)
at dalvik.system.NativeStart.main(Native Method)

感谢您的洞察力，我希望一劳永逸地解决这个问题！

编辑 - 将代码更改为使用 NumberFormat，如下所示：

// Required to handle European use of commas instead of decimals places
    // in their currency.
    edittext_amount.addTextChangedListener(new TextWatcher() {
        public void afterTextChanged(Editable edittext_amount) {
            String amount = "";
            if (edittext_amount != null) {
                try {
                    amount = edittext_amount.toString();

                    NumberFormat number_format = NumberFormat.getNumberInstance();
                    double_edittext_amount = number_format.parse(amount).doubleValue();

                }
                catch (NumberFormatException e) {
                    // Error
                }
                catch (ParseException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

        }
4

1 回答 1

0

这是做你正在做的事情的另一种方法；

String amount = null;
String fist = null;
String second = null;
if (edittext != null){
    amount = edittext.to string();
    if (amount.contains(","){
        StringTokenizer tokens = new StringTokenizer(CurrentString, ",");
         first = tokens.nextToken();// this will contain the whole number
         second = tokens.nextToken();//this will contain the decimal part
    } else if (amount.contains("."){
        StringTokenizer tokens = new StringTokenizer(CurrentString, ".");
        first = tokens.nextToken();// this will contain the whole number
        second = tokens.nextToken();//this will contain the decimal part
    }//That bit removed the decimal points, from the strings, now we just put them back together
String fullNumber = first + "." + second;
double_edittext_amount = Double.parseDouble(fullNumber);

希望这可以帮助

于 2012-10-20T22:00:19.893 回答