android - arraylist.add 在 android 中的编译时错误

Question

i have one ArrayList; in this i can't able to add the items

下面是我的代码，我不知道我犯了什么错误，请帮助解决这个问题

private ArrayList<Question> question = new ArrayList<Question>();

问题是一个有getter和setter的类

public class Question {

private String id;
private String question;
private String option1;
private String option2;
private String option3;
private String option4;

public Question(String id, String question, String option1, String option2,
        String option3, String option4) {
    super();
    this.id = id;
    this.question = question;
    this.option1 = option1;
    this.option2 = option2;
    this.option3 = option3;
    this.option4 = option4;
}

public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public String getQuestion() {
    return question;
}
public void setQuestion(String question) {
    this.question = question;
}
public String getOption1() {
    return option1;
}
public void setOption1(String option1) {
    this.option1 = option1;
}
public String getOption2() {
    return option2;
}
public void setOption2(String option2) {
    this.option2 = option2;
}
public String getOption3() {
    return option3;
}
public void setOption3(String option3) {
    this.option3 = option3;
}
public String getOption4() {
    return option4;
}
public void setOption4(String option4) {
    this.option4 = option4;
}

@Override
public String toString() {
    return question;
}

here i am adding to the array list:

JSONArray questions = data.getJSONArray("questions");
                        for(int i =0; i<questions.length();i++)
                        {                               
                            question.add(questions.getJSONObject(i).getString("id"),questions.getJSONObject(i).getString("question"),questions.getJSONObject(i).getJSONObject("options").getString("option1"),questions.getJSONObject(i).getJSONObject("options").getString("option2"),questions.getJSONObject(i).getJSONObject("options").getString("option3"),questions.getJSONObject(i).getJSONObject("options").getString("option4"));
                        }

But i am getting the following compile time error

The method add(int, Question) in the type ArrayList is not applicable for the arguments (String, String, String, String, String, String)

如何解决这个问题？？

Answer 1

您需要在 for 循环中创建一个新问题:

JSONArray questions = data.getJSONArray("questions");
for(int i =0; i<questions.length();i++)
{                               
    question.add(new Question(
        questions.getJSONObject(i).getString("id"),
        questions.getJSONObject(i).getString("question"),
        questions.getJSONObject(i).getJSONObject("options").getString("option1"),
        questions.getJSONObject(i).getJSONObject("options").getString("option2"),
        questions.getJSONObject(i).getJSONObject("options").getString("option3"),
        questions.getJSONObject(i).getJSONObject("options").getString("option4")
    ));
}