Question

我有3个问题

 private static int NUMBER_OF_QUESTIONS = 3;
static boolean[] answer = new boolean[NUMBER_OF_QUESTIONS];
static boolean[] checked = new boolean[NUMBER_OF_QUESTIONS];
static boolean[] isAnswered = new boolean[NUMBER_OF_QUESTIONS];

当没有回答所有问题时，我有一个方法

private boolean allAnswersChecked() {
    for (boolean radioAnswer : isAnswered) {
        if (!radioAnswer) {
            return false;
        }
    }
    return true

显示文字"You haven't checked all answers"

问题在于，即使按下所有false，它也会以某种方式返回rbs。即使已经检查了所有"You haven't checked all answers"，仍然会显示另一个单词rbs。

如何更改上述方法？

或者可能

它发生了这行中的值

static boolean[] isAnswered = new boolean[NUMBER_OF_QUESTIONS];

不要改变所有人。也许必须在方法setOnCheckedChangeListener中添加一些额外的代码，到目前为止只检查答案是否正确。

以下是rb [0]

的代码

 rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            if (checkedId == R.id.radioButton1) {
                Toast.makeText(getActivity(), "True", Toast.LENGTH_SHORT).show();
                checked[0] = true;
                answer[0] = true;
            } else {
                checked[0] = true;
                answer[0] = false;
            }

        }
    });

Answer 1

您在哪里更新 isAnswered 数组。在您提供的代码段中，它仅更新答案和已检查的数组。

可能这就是为什么你总是对 isAnswered 数组的所有3个数组元素都是假的。

您在哪里更新 isAnswered 数组。在您提供的代码段中，它仅更新答案和已检查的数组。

可能这就是为什么你总是对 isAnswered 数组的所有3个数组元素都是假的。

嗨罗马，

我相信你有多个无线电组，每组有3个单选按钮。如果是这种情况，只需在上面的代码片段稍作修改就可以了。

rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        if (checkedId == R.id.radioButton1) {
            Toast.makeText(getActivity(), "True", Toast.LENGTH_SHORT).show();
            checked[0] = true;
            answer[0] = true;
        } else {
            checked[0] = true;
            answer[0] = false;
        }
        // update isAnswered[0] to true. as this gets invoked when you choose any radio button.
        isAnswered[0] = true;
    }
});

如果有帮助，请告诉我。

Answer 2

试试这个：

static boolean[] isAnswered = new boolean[NUMBER_OF_QUESTIONS]; // initially all false

.............
....................

rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        if (checkedId == R.id.radioButton1) {
            Toast.makeText(getActivity(), "True", Toast.LENGTH_SHORT).show();
            checked[0] = true;
            answer[0] = true;
        } else {
            checked[0] = true;
            answer[0] = false;
        }

        // Update value as user selected radio button
        isAnswered[0] = true;
    }
});

为您的其他RadioGroups（rg2, rg3, ......）执行相同操作。希望这会有所帮助〜

Answer 3

我已经实现了一个快速类来验证您的逻辑，并且在您的实现中没有发现任何问题。

public class MainActivity extends AppCompatActivity {

    private static int NUMBER_OF_QUESTIONS = 3;
    static boolean[] isAnswered = new boolean[NUMBER_OF_QUESTIONS];

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

    private void setBooleanValues() {
        isAnswered[0]=true;
        isAnswered[1]=false;
        isAnswered[2]=true;
    }

    private void allAnswersChecked() {
        for (boolean radioAnswer : isAnswered) {
            if (!radioAnswer) {
                //return false;
                Log.d("allAnswersChecked","false");
            }
            else {
                Log.d("allAnswersChecked","true");
            }
        }
        //return true;
    }

}

请参阅日志输出：

05-12 16:43:10.299 8448-8448/com.example.myapplicationtest D/allAnswersChecked: true
05-12 16:43:10.299 8448-8448/com.example.myapplicationtest D/allAnswersChecked: false
05-12 16:43:10.299 8448-8448/com.example.myapplicationtest D/allAnswersChecked: true

所以我建议在调用allAnswersChecked（）之前打印值并检查它是否正确设置到isAnswered数组中。

从方法中获得恒定的错误值

3 个答案: