Java 当EditText输入为空时,Android应用程序崩溃
我试图在EditText为空且按钮被单击时显示祝酒词 单击按钮时,应用程序崩溃 我可能做错了什么?请帮助我,因为我是新的移动应用程序开发。 为了完成这项工作,我需要在哪里进行更改或纠正什么?感谢您的帮助Java 当EditText输入为空时,Android应用程序崩溃,java,android,mobile,crash,android-edittext,Java,Android,Mobile,Crash,Android Edittext,我试图在EditText为空且按钮被单击时显示祝酒词 单击按钮时,应用程序崩溃 我可能做错了什么?请帮助我,因为我是新的移动应用程序开发。 为了完成这项工作,我需要在哪里进行更改或纠正什么?感谢您的帮助 import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; im
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
public class EmployeeActivity extends AppCompatActivity {
EditText hourlyWage, totalRegularHours, totalOvertimeHours;
Button btnCalculate;
TextView result;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.employee_activity);
hourlyWage = findViewById(R.id.et_hourlyWage);
totalRegularHours = findViewById(R.id.et_totalRegularHours);
totalOvertimeHours = findViewById(R.id.et_totalOvertimeHours);
btnCalculate = findViewById(R.id.btnCalculate);
result = (TextView) findViewById(R.id.tv_Result);
}
// method to be called on onClick
public void calculateResult(View view) {
double regularHours = Integer.parseInt(totalRegularHours.getText().toString());
double overtimeHours;
overtimeHours = Integer.parseInt(totalOvertimeHours.getText().toString());
// check if EditText is empty
if (hourlyWage.getText().toString().trim().equals("")) {
Toast.makeText(this, "Please Enter The Value.", Toast.LENGTH_LONG).show();
}
// check if EditText is empty
else if (totalRegularHours.getText().toString().trim().equals("")) {
Toast.makeText(this, "Please Enter The Value.", Toast.LENGTH_LONG).show();
}
// check if EditText is out of range
else if (regularHours <= 0 && regularHours >= 40) {
Toast.makeText(this, "Please Enter The Value of Hours Between 0 to 40.", Toast.LENGTH_LONG).show();
}
// check if EditText is out of range
else if (overtimeHours <= 0 && overtimeHours >= 30) {
Toast.makeText(this, "Please Enter The Value of Hours Between 0 to 30.", Toast.LENGTH_LONG).show();
}
// calculates the answer
else if (regularHours >= 0 && regularHours <= 40) {
// formula for calculation
double regularWage;
regularWage = (Integer.parseInt(hourlyWage.getText().toString()) * Integer.parseInt(totalRegularHours.getText().toString())) + (Integer.parseInt(totalOvertimeHours.getText().toString()) * Integer.parseInt(hourlyWage.getText().toString()) * (1.5));
//displays the result in a TextView
result.setText(String.valueOf(regularWage));
}
}
}
导入android.os.Bundle;
导入android.view.view;
导入android.widget.Button;
导入android.widget.EditText;
导入android.widget.TextView;
导入android.widget.Toast;
导入androidx.appcompat.app.appcompat活动;
公共类EmployeeActivity扩展了AppCompatActivity{
EditText hourlyWage、totalRegularHours、totalOvertimeHours;
按钮BTN计算;
文本视图结果;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.employee_活动);
hourlyWage=findViewById(R.id.et_hourlyWage);
totalRegularHours=findViewById(R.id.et_totalRegularHours);
totalOvertimeHours=findViewById(R.id.et_totalOvertimeHours);
btnCalculate=findViewById(R.id.btnCalculate);
结果=(TextView)findViewById(R.id.tv_结果);
}
//要在onClick上调用的方法
公共无效计算结果(视图){
double regularHours=Integer.parseInt(totalRegularHours.getText().toString());
双倍超时;
overtimeHours=Integer.parseInt(totalOvertimeHours.getText().toString());
//检查EditText是否为空
if(hourlyWage.getText().toString().trim().equals(“”){
Toast.makeText(这是“请输入值”,Toast.LENGTH_LONG.show();
}
//检查EditText是否为空
else if(totalRegularHours.getText().toString().trim().equals(“”){
Toast.makeText(这是“请输入值”,Toast.LENGTH_LONG.show();
}
//检查EditText是否超出范围
否则,如果(正常小时数=40){
Toast.makeText(这是“请输入0到40之间的小时值”,Toast.LENGTH_LONG).show();
}
//检查EditText是否超出范围
否则如果(超时小时=30){
Toast.makeText(这是“请输入0到30之间的小时值”,Toast.LENGTH_LONG).show();
}
//计算答案
如果(regularHours>=0&®ularHours您正在使用带有空字符串的Integer.parseInt
进行解析。此外,您正在将整数存储在另一种类型中-double。以下是您的修复方法:
// method to be called on onClick
public void calculateResult(View view) {
// check if EditText is empty
if (hourlyWage.getText().toString().isEmpty()){
Toast.makeText(this, "Please Enter The Value.", Toast.LENGTH_LONG).show();
return;
}
// check if EditText is empty
if(totalRegularHours.getText().toString().isEmpty())
{
Toast.makeText(this, "Please Enter The Value.", Toast.LENGTH_LONG).show();
return;
}
int regularHours = Integer.parseInt(totalRegularHours.getText().toString());
int overtimeHours;
overtimeHours = Integer.parseInt(totalOvertimeHours.getText().toString());
// check if EditText is out of range
if (regularHours <= 0 && regularHours >= 40) {
Toast.makeText(this, "Please Enter The Value of Hours Between 0 to 40.", Toast.LENGTH_LONG).show();
}
// check if EditText is out of range
else if (overtimeHours <= 0 && overtimeHours >= 30) {
Toast.makeText(this, "Please Enter The Value of Hours Between 0 to 30.", Toast.LENGTH_LONG).show();
}
// calculates the answer
else if(regularHours >= 0 && regularHours <= 40) {
// formula for calculation
double regularWage;
regularWage = (Integer.parseInt(hourlyWage.getText().toString()) * Integer.parseInt(totalRegularHours.getText().toString())) + (Integer.parseInt(totalOvertimeHours.getText().toString()) * Integer.parseInt(hourlyWage.getText().toString()) * (1.5));
//displays the result in a TextView
result.setText(String.valueOf(regularWage));
}
}
//要在onClick上调用的方法
公共无效计算结果(视图){
//检查EditText是否为空
if(hourlyWage.getText().toString().isEmpty()){
Toast.makeText(这是“请输入值”,Toast.LENGTH_LONG.show();
返回;
}
//检查EditText是否为空
if(totalRegularHours.getText().toString().isEmpty())
{
Toast.makeText(这是“请输入值”,Toast.LENGTH_LONG.show();
返回;
}
int regularhouss=Integer.parseInt(totalregularhouss.getText().toString());
int超时小时;
overtimeHours=Integer.parseInt(totalOvertimeHours.getText().toString());
//检查EditText是否超出范围
如果(正常小时数=40){
Toast.makeText(这是“请输入0到40之间的小时值”,Toast.LENGTH_LONG).show();
}
//检查EditText是否超出范围
否则如果(超时小时=30){
Toast.makeText(这是“请输入0到30之间的小时值”,Toast.LENGTH_LONG).show();
}
//计算答案
如果(regularHours>=0&®ularHours您正在使用带有空字符串的Integer.parseInt
进行解析。此外,您正在将整数存储在另一种类型中-double。以下是您的修复方法:
// method to be called on onClick
public void calculateResult(View view) {
// check if EditText is empty
if (hourlyWage.getText().toString().isEmpty()){
Toast.makeText(this, "Please Enter The Value.", Toast.LENGTH_LONG).show();
return;
}
// check if EditText is empty
if(totalRegularHours.getText().toString().isEmpty())
{
Toast.makeText(this, "Please Enter The Value.", Toast.LENGTH_LONG).show();
return;
}
int regularHours = Integer.parseInt(totalRegularHours.getText().toString());
int overtimeHours;
overtimeHours = Integer.parseInt(totalOvertimeHours.getText().toString());
// check if EditText is out of range
if (regularHours <= 0 && regularHours >= 40) {
Toast.makeText(this, "Please Enter The Value of Hours Between 0 to 40.", Toast.LENGTH_LONG).show();
}
// check if EditText is out of range
else if (overtimeHours <= 0 && overtimeHours >= 30) {
Toast.makeText(this, "Please Enter The Value of Hours Between 0 to 30.", Toast.LENGTH_LONG).show();
}
// calculates the answer
else if(regularHours >= 0 && regularHours <= 40) {
// formula for calculation
double regularWage;
regularWage = (Integer.parseInt(hourlyWage.getText().toString()) * Integer.parseInt(totalRegularHours.getText().toString())) + (Integer.parseInt(totalOvertimeHours.getText().toString()) * Integer.parseInt(hourlyWage.getText().toString()) * (1.5));
//displays the result in a TextView
result.setText(String.valueOf(regularWage));
}
}
//要在onClick上调用的方法
公共无效计算结果(视图){
//检查EditText是否为空
if(hourlyWage.getText().toString().isEmpty()){
Toast.makeText(这是“请输入值”,Toast.LENGTH_LONG.show();
返回;
}
//检查EditText是否为空
if(totalRegularHours.getText().toString().isEmpty())
{
Toast.makeText(这是“请输入值”,Toast.LENGTH_LONG.show();
返回;
}
int regularhouss=Integer.parseInt(totalregularhouss.getText().toString());
int超时小时;
overtimeHours=Integer.parseInt(totalOvertimeHours.getText().toString());
//检查EditText是否超出范围
如果(正常小时数=40){
Toast.makeText(这是“请输入0到40之间的小时值”,Toast.LENGTH_LONG).show();
}
//检查EditText是否超出范围
否则如果(超时小时=30){
Toast.makeText(这是“请输入0到30之间的小时值”,Toast.LENGTH_LONG).show();
}
//计算答案
否则,如果(regularHours>=0&®ularHours您可以检查EditText
是否为空,或者是否使用TextUtils
类,如下所示:
if(TextUtils.isEmpty(yourEditText.getText().toString())) {
Toast.makeText(this, "Edit text is empty", Toast.LENGTH_SHORT).show();
return;
}
您可以使用TextUtils
类检查EditText
是否为空,如下所示:
if(TextUtils.isEmpty(yourEditText.getText().toString())) {
Toast.makeText(this, "Edit text is empty", Toast.LENGTH_SHORT).show();
return;
}
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