Android 获取双变量值时发生致命异常

Question

当用户在应用程序中输入折扣率时，我使用一个按钮来计算折扣。当我得到低于 1000 的总价值时，它工作正常并提供折扣。但如果总值大于 1000，它会给出致命异常并使应用程序崩溃。你能帮我解决这个问题吗？谢谢

 calculate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Double discountRate = Double.parseDouble(input_rate.getText().toString());
                Double  discount = 0.0;

                if(discountRate.equals("")){
                    Toast.makeText(CreateInvoiceActivity.this, "Discount Rate is Empty", Toast.LENGTH_SHORT).show();
                }
                else {
                    Double totalValue = Double.parseDouble(invoiceTotal.getText().toString());
                    
                    try {
                        discount = (totalValue * (discountRate / 100));
                        
                        Toast.makeText(CreateInvoiceActivity.this, "Discount is" + discount, Toast.LENGTH_SHORT).show();
                    }catch (NumberFormatException ignore){}
                }
            }
        });

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.antlergroup.aits.ierunt.ai, PID: 26795
    java.lang.NumberFormatException: For input string: "1,008.00"
        at java.lang.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1306)
        at java.lang.Double.parseDouble(Double.java:547)
        at com.antlergroup.aits.ierunt.ai.view.activity.CreateInvoiceActivity.onClick(CreateInvoiceActivity.java:291)
        at android.view.View.performClick(View.java:5647)
        at android.view.View$PerformClick.run(View.java:22479)
        at android.os.Handler.handleCallback(Handler.java:761)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:156)
        at android.app.ActivityThread.main(ActivityThread.java:6623)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:942)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:832)
I/Process: Sending signal. PID: 26795 SIG: 9

Answer 1

您应该删除千位分隔符（逗号）。

Double totalValue = Double.parseDouble(invoiceTotal.getText().toString().replace(",", ""));

您还应该：

首选java.text.NumberFormat解析数字
使用正确的语言环境
验证输入

Android 获取双变量值时发生致命异常

FATAL EXCEPTION in Android When getting Double Varible Values

double

android

exception

numberformatexception

android-studio