Android studio不接受字符串。当我想从edittext向类中放入字符串时

Question

我评论了它停止工作的地方，有人能帮忙吗！这个代码是一个罗马数字转换器。我把号码打给了roman，但roman打给了号码，应用程序崩溃了。如果有人知道代码崩溃的原因或方式，请lmk，以及如何修复它！我已经连续8个小时在做这件事了，但仍然找不到问题所在。我是android studio的新手，这也可能是原因。谢谢

Logcat错误：

2022-01-27 13:27:33.286 1575-1575/com.example.numeralromancalculator E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.numeralromancalculator, PID: 1575
    android.content.res.Resources$NotFoundException: String resource ID #0x5
        at android.content.res.Resources.getText(Resources.java:444)
        at android.widget.TextView.setText(TextView.java:6412)
        at com.example.numeralromancalculator.MainActivity$1.onClick(MainActivity.java:54)
        at android.view.View.performClick(View.java:7448)
        at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1131)
        at android.view.View.performClickInternal(View.java:7425)
        at android.view.View.access$3600(View.java:810)
        at android.view.View$PerformClick.run(View.java:28305)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

convertToNum.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                //converter class is called
                converter cn = new converter();

                //checks if input is int or not
                boolean digitCheck = TextUtils.isDigitsOnly(inputRoman.getText());


//App Crashes HERE
                if (digitCheck == false){
                    //the input from the user
                    String theRom = inputRoman.getText().toString();

                    //string output to user
                    int outputNum = cn.romanToInteger(theRom);

                    //outputs number to roman conversion
                    numOutput.setText(outputNum);
                }else{

                    //statement to print to screen
                    String reTry = "Invalid: Try Again";

                    //Outputs that users input is not valid
                    numOutput.setText(reTry);
                }

            }
        });

        //If Convert tto Roman button is clicked
        convertToRoman.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                //converter class is called
                converter nc = new converter();

                //checks if input is int or not
                boolean digitCheck = TextUtils.isDigitsOnly(inputNum.getText());

                if (digitCheck == true){
                    //the input from the user
                    int theNumber = Integer.parseInt(inputNum.getText().toString());

                    //string output to user
                    String theRoman = nc.toRoman(theNumber);

                    //outputs number to roman conversion
                    romanOutput.setText(theRoman);
                }else{

                    //statement to print to screen
                    String reTry = "Invalid: Try Again";

                    //Outputs that users input is not valid
                    romanOutput.setText(reTry);
                }

            }
        });

        }

    }

public class converter {

    public String toRoman(int numberInput) {

        //checks if integer conversion is possible
        if (numberInput < 1 || numberInput > 3999) {
            return "Sorry, Not Possible";
        }

        //Roman letter total
        String returnValue = "";

        //while statements to check for roman letters, and adds to total
        //descending order

        while (numberInput >= 1000) {
            returnValue += "M";
            numberInput -= 1000;
        }
        while (numberInput >= 900) {
            returnValue += "CM";
            numberInput -= 900;
        }
        while (numberInput >= 500) {
            returnValue += "D";
            numberInput -= 500;
        }
        while (numberInput >= 400) {
            returnValue += "CD";
            numberInput -= 400;
        }
        while (numberInput >= 100) {
            returnValue += "C";
            numberInput -= 100;
        }
        while (numberInput >= 90) {
            returnValue += "XC";
            numberInput -= 90;
        }
        while (numberInput >= 50) {
            returnValue += "L";
            numberInput -= 50;
        }
        while (numberInput >= 40) {
            returnValue += "XL";
            numberInput -= 40;
        }
        while (numberInput >= 10) {
            returnValue += "X";
            numberInput -= 10;
        }
        while (numberInput >= 9) {
            returnValue += "IX";
            numberInput -= 9;
        }
        while (numberInput >= 5) {
            returnValue += "V";
            numberInput -= 5;
        }
        while (numberInput >= 4) {
            returnValue += "IV";
            numberInput -= 4;
        }
        while (numberInput >= 1) {
            returnValue += "I";
            numberInput -= 1;
        }

        //return a string value of the numeral
        return returnValue;
    }

//APP CRASHES USING THIS CLASS

    public int romanToInteger(String roman) {
        int number = 0;
        for (int i = 0; i < roman.length(); i++) {
            char c = roman.charAt(i);
            switch (c) {
                case 'I':
                    number = (i != roman.length() - 1 && (roman.charAt(i + 1) == 'V' || roman.charAt(i + 1) == 'X'))
                            ? number - 1
                            : number + 1;
                    break;
                case 'V':
                    number += 5;
                    break;
                case 'X':
                    number = (i != roman.length() - 1 && (roman.charAt(i + 1) == 'L' || roman.charAt(i + 1) == 'C'))
                            ? number - 10
                            : number + 10;
                    break;
                case 'L':
                    number += 50;
                    break;
                case 'C':
                    number = (i != roman.length() - 1 && (roman.charAt(i + 1) == 'D' || roman.charAt(i + 1) == 'M'))
                            ? number - 100
                            : number + 100;
                    break;
                case 'D':
                    number += 500;
                    break;
                case 'M':
                    number += 1000;
                    break;
            }
        }

        return number;
    }

        }

Answer 1

似乎方法中的值被解释为资源ID，因此请确保类型为String：

 //string output to user
 String outputNum = Integer.toString(cn.romanToInteger(theRom));

 //outputs number to roman conversion
 numOutput.setText(outputNum);