英文:
How to convert the values of CheckBoxes into a sum of integers?
问题
我创建了3个包含颜色的CheckBox：红色、蓝色和白色。每个复选框都包含一个值。红色复选框包含值10。蓝色复选框包含值20。白色复选框包含值30。
当任何用户点击任何CheckBox，然后按下calculateResult按钮时，名为showResult的textView将显示用户点击的CheckBox值的总和。
我的代码：
package com.mycode.testingcheckbox;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
CheckBox red;
CheckBox blue;
CheckBox white;
Button calculateResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
red = findViewById(R.id.red);
blue = findViewById(R.id.blue);
white = findViewById(R.id.white);
calculateResult = findViewById(R.id.calculateResult);
final TextView showResult = findViewById(R.id.showResult);
calculateResult.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int result = 0;
if (red.isChecked()) {
result += 10;
}
if (blue.isChecked()) {
result += 20;
}
if (white.isChecked()) {
result += 30;
}
showResult.setText(result);
}
});
}
}
英文:
I created 3 CheckBox containing the colors: red, blue and white. Each checkbox contains a value. The red checkbox contains the value 10. The blue checkbox contains the value 20. And the white checkbox contains the value 30.
I would like that when any user clicked on any CheckBox and then pressed the calculateResult button, the textView called showResult would show the sum of the CheckBox values clicked by the user.
My code:
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
CheckBox red;
CheckBox blue;
CheckBox white;
Button calculateResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
red = findViewById(R.id.red);
blue = findViewById(R.id.blue);
white = findViewById(R.id.white);
calculateResult = findViewById(R.id.calculateResult);
final TextView showResult = findViewById(R.id.showResult);
calculateResult.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int result = 0;
if (red.isChecked()) {
result += 10;
}
if (blue.isChecked()) {
result += 20;
}
if (white.isChecked()) {
result += 30;
}
showResult.setText(result);
}
});
}
}```
</details>
# 答案1
**得分**: 1
这是您想要的：
```java
public class MainActivity extends AppCompatActivity {
CheckBox red;
CheckBox blue;
CheckBox white;
Button calculateResult;
Integer[] checkBoxValues = {10, 20, 30};
int result = 0;
int redValue = 0, blueValue = 0, whiteValue = 0;
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
red = findViewById(R.id.red);
blue = findViewById(R.id.blue);
white = findViewById(R.id.white);
calculateResult = findViewById(R.id.calculateResult);
final TextView showResult = findViewById(R.id.showResult);
calculateResult.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (red.isChecked()) redValue = checkBoxValues[0];
else redValue = 0;
if (blue.isChecked()) blueValue = checkBoxValues[1];
else blueValue = 0;
if (white.isChecked()) whiteValue = checkBoxValues[2];
else whiteValue = 0;
result = redValue + blueValue + whiteValue;
showResult.setText(String.valueOf(result));
}
});
}
}
英文:
Here's what you want :
public class MainActivity extends AppCompatActivity {
CheckBox red;
CheckBox blue;
CheckBox white;
Button calculateResult;
Integer[] checkBoxValues = {10, 20, 30};
int result = 0;
int redValue = 0, blueValue = 0, whiteValue = 0;
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
red = findViewById(R.id.red);
blue = findViewById(R.id.blue);
white = findViewById(R.id.white);
calculateResult = findViewById(R.id.calculateResult);
final TextView showResult = findViewById(R.id.showResult);
calculateResult.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (red.isChecked()) redValue = checkBoxValues[0];
else redValue = 0;
if (blue.isChecked()) blueValue = checkBoxValues[1];
else blueValue = 0;
if (white.isChecked()) whiteValue = checkBoxValues[2];
else whiteValue = 0;
result = redValue + blueValue + whiteValue;
showResult.setText(String.valueOf(result));
}
});
}
}
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