Question

以下是该情景：

我在一个活动中提出了一些问题，每个答案都有一个要点（0到3）。例如，如果用户选择第一个，他得到0分，如果他选择了第一个，他将获得1分等（第三个为2分，第四个为3分）。

radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            if (checkedId == R.id.first_radiobutton) {
                totalPoint = totalPoint + 0;
            } else if (checkedId == R.id.secound_radiobutton) {
                totalPoint = totalPoint + 1;
            }else if (checkedId == R.id.third_radiobutton) {
                totalPoint = totalPoint + 2;
            }else if (checkedId == R.id.forth_radiobutton) {
                totalPoint = totalPoint + 3;
            }
        }
    });

我将totalPoint作为全局变量并将其初始化为public static int totalPoint = 0;。问题是，如果用户改变了主意并为当前问题选择了另一个答案，totalPoint变量会将该点添加到自身。例如，假设如果用户点击第三个radioButton，则totalPoint变量将为2，因此如果用户改变了主意并选择了第四个radioButton，则{{1必须是3，但它将是5（2 + 3）。我怎么能避免这个？

Answer 1

在类

中声明一个int数组

 int arrValues[]={0,0,0,0}; ///size can be differ as per question length you can create dynamic too as per your requirement

并维持问题的反击或立场 int iPosition=0; ///在上一个和下一个

处理它

然后在setOnCheckedChangeListener中添加以下代码

radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            if (checkedId == R.id.first_radiobutton) {
               arrValues[iPosition] = 0;
            } else if (checkedId == R.id.secound_radiobutton) {
                arrValues[iPosition] =  1;
            }else if (checkedId == R.id.third_radiobutton) {
               arrValues[iPosition]=  2;
            }else if (checkedId == R.id.forth_radiobutton) {
              arrValues[iPosition] =  3;
            }
        }
    });

并且最后一步从数组中添加所有值

Answer 2

1。使用数组answers[]存储特定points的答案question。

2。在onCheckedChanged()中，选中RadioButton，并使用{{1}的值将已分配的points存储在特定的question下}。

3。按currentQuestion total adding数组values计算answers点数。

以下是工作代码：

public class MainActivity extends AppCompatActivity {

    RadioGroup radioGroup;

    int totalPoint = 0;
    int answers[] = new int[10]; // Required for 10 questions (0 to 9)
    int currentQuestion = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        radioGroup = (RadioGroup) findViewById(R.id.radio_group);

        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {

                // Store points of specific question using position currentQuestion
                if (checkedId == R.id.first_radiobutton) {
                    answers[currentQuestion] = 0;
                } else if (checkedId == R.id.second_radiobutton) {
                    answers[currentQuestion] = 1;
                }else if (checkedId == R.id.third_radiobutton) {
                    answers[currentQuestion] = 2;
                }else if (checkedId == R.id.forth_radiobutton) {
                    answers[currentQuestion] = 3;
                }

                // Total
                totalPoint = getTotalPoint();
            }
        });
    }

    public int getTotalPoint() {

        int sum = 0;
        for (int i = 0; i < answers.length; i++)
            sum += answers[i];

        return sum;
    }
}

android中的RadioButton值

2 个答案: