java - 致命异常:切换按钮上的java.lang.NumberFormatException分配 double 值

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Best way to parseDouble with comma as decimal separator?

（9个答案）


2个月前关闭。





我在某些设备（主要是API29）中遇到此异常。因此，请为“切换”按钮分配双舍入值。当用户单击它们时，它将把该值添加到当前总计中，然后将该总计转换为String以便在TextView中显示。

我尝试添加异常，但是它无法显示分配给切换按钮的双倍价格。

另外，我在这里查看了其他一些线程，这些线程对我们没有帮助。

代码如下；有什么指导吗？

private void setListeners() {


        //boolean chemoIsChecked = false;

        chemoBtn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {

                    if (isChecked) {
                        try{

                            Double chemoPrice = Double.valueOf(chemoButtonPrice);
                            d = chemoPrice + d;
                            String totalPrice = String.valueOf(String.format(Locale.GERMAN, "%.2f", d));
                            premiumTitle.setText("Premie per maand incl. BTW: € " + totalPrice);

                        }catch (NumberFormatException e){

                        }

                    } else {
                        try{

                        }catch (NumberFormatException e){
                            Double chemoPrice = Double.valueOf(chemoButtonPrice);
                            d = d - chemoPrice;
                            String totalPrice = String.valueOf(String.format(Locale.GERMAN,"%.2f", d));
                            premiumTitle.setText("Premie per maand incl. BTW: € " + totalPrice);
                        }

                    }

            }
        });

        cremBtn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
                if (isChecked) {
                    Double cremPrice = Double.valueOf(cremationButtonPrice);
                    d = cremPrice + d;
                    String totalPrice = String.valueOf(String.format(Locale.GERMAN,"%.2f", d));
                    premiumTitle.setText("Premie per maand incl. BTW: € " + totalPrice);
                } else {
                    Double cremPrice = Double.valueOf(cremationButtonPrice);
                    d = d - cremPrice;
                    String totalPrice = String.valueOf(String.format(Locale.GERMAN,"%.2f", d));
                    premiumTitle.setText("Premie per maand incl. BTW: € " + totalPrice);
                }
            }

        });

        travenBtn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
                if (isChecked) {
                    Double travelPrice = Double.valueOf(travelButtonPrice);
                    d = travelPrice + d;
                    String totalPrice = String.valueOf(String.format(Locale.GERMAN,"%.2f", d));
                    premiumTitle.setText("Premie per maand incl. BTW: € " + totalPrice);
                } else {
                    Double travelPrice = Double.valueOf(travelButtonPrice);
                    d = d - travelPrice;
                    String totalPrice = String.valueOf(String.format(Locale.GERMAN,"%.2f", d));
                    premiumTitle.setText("Premie per maand incl. BTW: € " + totalPrice);
                }
            }

        });

        btnContinue.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                createAdditionalPackages();


}

Fatal Exception: java.lang.NumberFormatException: For input string: "3,78"
       at sun.misc.FloatingDecimal.readJavaFormatString + 2043(FloatingDecimal.java:2043)
       at sun.misc.FloatingDecimal.parseDouble + 110(FloatingDecimal.java:110)
       at java.lang.Double.parseDouble + 538(Double.java:538)
       at java.lang.Double.valueOf + 502(Double.java:502)
       at nl.risk.www.smart2coverapp.activity.PetplanAdditionalPlansActivity$2.onCheckedChanged + 165(PetplanAdditionalPlansActivity.java:165)
       at android.widget.CompoundButton.setChecked + 182(CompoundButton.java:182)
       at android.widget.ToggleButton.setChecked + 71(ToggleButton.java:71)
       at android.widget.CompoundButton.toggle + 136(CompoundButton.java:136)
       at android.widget.CompoundButton.performClick + 141(CompoundButton.java:141)
       at android.view.View.performClickInternal + 7312(View.java:7312)
       at android.view.View.access$3200 + 846(View.java:846)
       at android.view.View$PerformClick.run + 27794(View.java:27794)
       at android.os.Handler.handleCallback + 873(Handler.java:873)
       at android.os.Handler.dispatchMessage + 99(Handler.java:99)
       at android.os.Looper.loop + 214(Looper.java:214)
       at android.app.ActivityThread.main + 7099(ActivityThread.java:7099)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run + 494(RuntimeInit.java:494)
       at com.android.internal.os.ZygoteInit.main + 965(ZygoteInit.java:965)

最佳答案

而不是做：

Double travelPrice = Double.valueOf(travelButtonPrice);

首先用replace将逗号转换为点：

Double travelPrice = Double.valueOf(travelButtonPrice.replace(",", "."));