我已经看到许多与此有关的问题，但我无法解决此问题。我有一个带有用户要填充的EditTexts的表单，也有一个计算器。完成数学运算后，总保费就会变成一个值。然后，用户需要单击“提交”按钮以将详细信息添加到他的购物车，然后他可以从另一种相同类型的表格重新开始或进行结帐。如果他填写另一张表格，然后再次单击“提交”按钮。这些数据将显示在RecyclerView中，每种表格的总保费应添加到其中，并显示在购物车的底部，以便他可以付款。 问题是一旦我在数学运算后单击提交按钮即可继续购物车。该应用程序崩溃并给我“由java.lang.NumberFormatException引起：无效的int：“ null” ..请帮助。我看不到错误在哪里。完成数学运算后，我将结果转换为字符串，然后单击“提交”按钮，将其添加到购物车中。然后在购物车类上。表格应将所有总保费相加。
Caused by: java.lang.NumberFormatException: Invalid int: "null"
at java.lang.Integer.invalidInt(Integer.java:138)
at java.lang.Integer.parse(Integer.java:410)
at java.lang.Integer.parseInt(Integer.java:367)
at java.lang.Integer.parseInt(Integer.java:334)
at com.urbanx.urbaninsure.Cart.loadListProposals(Cart.java:167)
at com.urbanx.urbaninsure.Cart.onCreate(Cart.java:113)
at android.app.Activity.performCreate(Activity.java:6178)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2648)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2769)
at android.app.ActivityThread.access$900(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1430)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5910)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)
这是我的提案表单类的一部分，我在其中填写表单并提交
private void fillProposalForm() {
if (etFirstNameOfProposer.getText().toString().isEmpty()){
etFirstNameOfProposer.setError("First name cannot be empty");
} else{
firstNameProposer = etFirstNameOfProposer.getText().toString();
}
if (etSurnameProposer.getText().toString().isEmpty()){
etSurnameProposer.setError("Surname cannot be empty");
} else {
surnameProposer = etSurnameProposer.getText().toString();
}
if (etLastNameProposer.getText().toString().isEmpty()){
etLastNameProposer.setError("Last name cannot be empty");
} else
{
lastNameProposer = etLastNameProposer.getText().toString();
}
if (etPassportNo.getText().toString().isEmpty()){
etPassportNo.setError("ID/Passport number cannot be empty");
} else{
idNumber = etPassportNo.getText().toString();
} if (etPinNo.getText().toString().isEmpty()){
etPinNo.setError("KRA pin number cannot be empty");
}else {
pinNo = etPinNo.getText().toString();
}if (etMobile.getText().toString().isEmpty()){
etMobile.setError("Mobile number cannot be empty");
}else {
mobile = etMobile.getText().toString();
} if (etEmail.getText().toString().isEmpty()){
etEmail.setError("Email cannot be empty");
}else if (!Patterns.EMAIL_ADDRESS.matcher(etEmail.getText().toString()).matches()){
etEmail.setError("Invalid email address");
}
else {
email = etEmail.getText().toString();
}if (etDrivingTime.getText().toString().isEmpty()){
etDrivingTime.setError("Driving time duration cannot be empty");
} else {
drivingTime = etDrivingTime.getText().toString();
}if (etDuration.getText().toString().isEmpty()) {
etDuration.setError("Duration of insurance cannot be empty");
} else {
duration = etDuration.getText().toString();
}if (etVehicelReg.getText().toString().isEmpty()){
etVehicelReg.setError("Vehicle registration cannot be empty");
} else {
vehicleReg = etVehicelReg.getText().toString();
}if (etEstimate.getText().toString().isEmpty()) {
etEstimate.setError("The present estimated value of vehicle cannot be empty");
bSubmit.setEnabled(false);
} else {
marketValue = etEstimate.getText().toString();
}
spTypeOfCoverage.setAdapter(TypeOfCoverageAdapter);
spTypeOfCoverage.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
typeOfCoverage = spTypeOfCoverage.getItemAtPosition(position).toString();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
spMake.setAdapter(MakeAdapter);
spMake.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if (i == 0) {
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 1) {
spModel.setAdapter(subaruCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 2) {
spModel.setAdapter(toyotaCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 3) {
spModel.setAdapter(nissanCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 4) {
spModel.setAdapter(mercedesBenzCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 5) {
spModel.setAdapter(BMWCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 6) {
spModel.setAdapter(audiCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 7) {
spModel.setAdapter(landRoverCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 8) {
spModel.setAdapter(hondaCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 9) {
spModel.setAdapter(mazdaCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 10) {
spModel.setAdapter(mitsubishiCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 11) {
spModel.setAdapter(peugeotCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 12) {
spModel.setAdapter(isuzuCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else if (i == 13) {
spModel.setAdapter(volkswagenCarsAdapter);
vehicleMake = spMake.getItemAtPosition(position).toString();
} else {
vehicleMake = spMake.getItemAtPosition(position).toString();
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
spUseOfVehicle.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
useOfVehicle= spUseOfVehicle.getSelectedItem().toString();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
spModel.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if (spModel.getSelectedItem().toString().contains("Other")) {
vehicleModel = spModel.getSelectedItem().toString();
} else {
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
spinnerModelYear.setAdapter(yearAdapter);
spinnerModelYear.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
yearOfManf = spinnerModelYear.getSelectedItem().toString();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
if (etLimitWindscreen.getText().toString().isEmpty()){
etLimitWindscreen.setText(String.valueOf(0));
}
windscreenValue = etLimitWindscreen.getText().toString();
if (etLimitDvd.getText().toString().isEmpty()){
etLimitDvd.setText(String.valueOf(0));
}
dvd = etLimitDvd.getText().toString();
if ( etLimitRiot.getText().toString().isEmpty()){
etLimitRiot.setText(String.valueOf(0));
}
riot = etLimitRiot.getText().toString();
if ( etLimitExcessProtect.getText().toString().isEmpty()){
etLimitExcessProtect.setText(String.valueOf(0));
}
excessProtector = etLimitExcessProtect.getText().toString();
if (etLimitTerrorism.getText().toString().isEmpty()){
etLimitTerrorism.setText(String.valueOf(0));
}
terrorism = etLimitTerrorism.getText().toString();
if (etCourtesyCar.getText().toString().isEmpty()){
etCourtesyCar.setText(String.valueOf(0));
}
courtesyCar = etCourtesyCar.getText().toString();
calculateInsurance();
proposalId = "number";
currentProposer = new ProposalDetails(proposalId, firstNameProposer
,lastNameProposer,surnameProposer, idNumber, pinNo,
email, mobile, drivingTime, duration, vehicleReg,
marketValue, typeOfCoverage, useOfVehicle, vehicleMake, vehicleModel,
yearOfManf, windscreenValue, dvd, riot,
excessProtector, terrorism, courtesyCar, basicPremium, trainingLevy,
policyHolders, stampDuty, totalPremium);
currentProposer.setFirstNameProposer(firstNameProposer);
currentProposer.setSurnameProposer(surnameProposer);
currentProposer.setLastNameProposer(lastNameProposer);
currentProposer.setEmail(email);
currentProposer.setMobile(mobile);
currentProposer.setDrivingTime(drivingTime);
currentProposer.setIdNumber(idNumber);
currentProposer.setVehicleReg(vehicleReg);
currentProposer.setDuration(duration);
currentProposer.setMarketValue(marketValue);
currentProposer.setTypeOfCoverage(typeOfCoverage);
currentProposer.setUseOfVehicle(useOfVehicle);
currentProposer.setVehicleMake(vehicleMake);
currentProposer.setVehicleModel(vehicleModel);
currentProposer.setYearOfManf(yearOfManf);
currentProposer.setWindscreenValue(windscreenValue);
currentProposer.setDvd(dvd);
currentProposer.setRiot(riot);
currentProposer.setExcessProtector(excessProtector);
currentProposer.setTerrorism(terrorism);
currentProposer.setCourtesyCar(courtesyCar);
currentProposer.setBasicPremium(basicPremium);
currentProposer.setTrainingLevy(trainingLevy);
currentProposer.setPolicyHolders(policyHolders);
currentProposer.setStampDuty(stampDuty);
currentProposer.setTotalPremium(totalPremium);
// mProposalInformation.child(proposalId).setValue(currentProposer);
new Database(getBaseContext()).addToCart(new Order(
currentProposer.getFirstNameProposer(),
currentProposer.getSurnameProposer(),
currentProposer.getLastNameProposer(),
currentProposer.getMobile(),
currentProposer.getIdNumber(),
currentProposer.getDuration(),
currentProposer.getVehicleReg(),
currentProposer.getTotalPremium()));
startActivity(new Intent(ProposalForm1.this,Cart.class));
}
private void calculateInsurance() {
double MarketValue,
Duration ,
TotalPremium;
try {
MarketValue = Double.valueOf(etEstimate.getText().toString());
} catch (NumberFormatException e) {
MarketValue = 0; // your default value
}
try {
Duration = Double.valueOf(etDuration.getText().toString());
} catch (NumberFormatException e) {
Duration = 0; // your default value
}
double Windscreen ;
try {
Windscreen = Double.valueOf(etLimitWindscreen.getText().toString());
} catch (NumberFormatException e) {
Windscreen = 0; // your default value
}
double Riot ;
try {
Riot = Double.valueOf(etLimitRiot.getText().toString());
} catch (NumberFormatException e) {
Riot = 0; // your default value
}
double Terrorism ;
try {
Terrorism = Double.valueOf(etLimitTerrorism.getText().toString());
} catch (NumberFormatException e) {
Terrorism = 0; // your default value
}
double Excessprotect ;
try {
Excessprotect = Double.valueOf(etLimitExcessProtect.getText().toString());
} catch (NumberFormatException e) {
Excessprotect = 0; // your default value
}
double Dvd ;
try {
Dvd = Double.valueOf(etLimitDvd.getText().toString());
} catch (NumberFormatException e) {
Dvd = 0; // your default value
}
double CourtesyCar ;
try {
CourtesyCar = Double.valueOf(etCourtesyCar.getText().toString());
} catch (NumberFormatException e) {
CourtesyCar = 0; // your default value
}
double Prata = 1;
if (Duration == 0){
Prata = 1;
}
else if (Duration == 1){
Prata = 0.3;
}
else if (Duration == 2){
Prata = 0.4;
}
else if (Duration == 3){
Prata = 0.5;
}
else if (Duration == 4){
Prata = 0.6;
}
else if (Duration == 5){
Prata = 0.7;
}
else if (Duration > 5){
Prata = 1;
}
double Basicpremium = (MarketValue/100.0f) * coverageInt * Prata;
etBasicPremium.setText(String.valueOf(Basicpremium));
etBasicPremium.setText(""+Basicpremium);
double Traininglevy = (Basicpremium/100.0f)* 0.45;
etTrainingLevy.setText(String.valueOf(Traininglevy));
etTrainingLevy.setText(""+Traininglevy);
double PolicyholdersFund = (Basicpremium/100.0f) * 0.25;
etPolicyHolders.setText(String.valueOf(PolicyholdersFund));
etPolicyHolders.setText(""+PolicyholdersFund);
double Stampduty = 40;
etStampDuty.setText(String.valueOf(Stampduty));
etStampDuty.setText(""+Stampduty);
TotalPremium = Basicpremium + Traininglevy + PolicyholdersFund + Stampduty + Windscreen + Dvd + Riot + Terrorism + Excessprotect + CourtesyCar;
int tp = (int) TotalPremium;
totalPremium = String.valueOf(tp);
etTotalPremium.setText(totalPremium);
basicPremium = etBasicPremium.getText().toString();
trainingLevy = etTrainingLevy.getText().toString();
policyHolders = etPolicyHolders.getText().toString();
stampDuty = etStampDuty.getText().toString();
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.bSubimt:
fillProposalForm();
break;
}
}
这是Cart类的一部分，给我一个错误
private void loadListProposals() {
cart = new Database(this).getCarts();
adapter = new CartAdapter(cart,this);
recyclerView.setAdapter(adapter);
//Calculate totalPremium
int total = 0;
for (Order order:cart) {
// try
// {
// if( null != order.getTotalPremium() )
// {
total += Integer.parseInt( order.getTotalPremium());
Locale locale = new Locale("en", "US");
NumberFormat fmt = NumberFormat.getCurrencyInstance(locale);
txtTotalPrice.setText(fmt.format(total));
// }
// } catch (NumberFormatException ignored){
}
}
答案 0 :(得分：1)
此处order.getTotalPremium()将“ null”保留为String。像String val = "null"