在一个 activity 内使用单选按钮

Question

我正在制作一个测验应用程序，其中有一些问题：

当用户单击 NEXT QUESTION 时，将显示另一个问题。我做了现在的代码：

public void onRadioButtonClicked(View view) {
    // Is the button now checked?
    boolean checked = ((RadioButton) view).isChecked();

    // Check which radio button was clicked
    switch(view.getId()) {
        case R.id.number_1:
            if (checked)
                point = 0;
            Toast.makeText(this, ""+ point,
                    Toast.LENGTH_LONG).show();

            break;
        case R.id.number_2:
            if (checked)
                point = 1;
            Toast.makeText(this, ""+ point,
                    Toast.LENGTH_LONG).show();

            break;
        case R.id.number_3:
            if (checked)
                point = 2;
            Toast.makeText(this, ""+ point,
                    Toast.LENGTH_LONG).show();

            break;
        case R.id.number_4:
            if (checked)
                point = 3;
            Toast.makeText(this, ""+ point,
                    Toast.LENGTH_LONG).show();

            break;
    }
}

如何在单击 NEXT QUESTION 时发生这种情况，在同一 activity 中弹出另一个问题？

Answer 1

你有问题TextView，只需使用questionTextView.setText(newQuestion)

将所有单选按钮设置为 false/unselected idk 是正确的。

但最好在您的 activity 中放置一个 FrameLayout 并在您的用户每次回答问题并构建一个新的 View 时调用一个新的 QuestionFragment ，您的控制器将更加独立。

Answer 2

你可以这样做

public void nextQuestion(View view){

   questionTextView.setText(gtString(R.string.nextQuestion));
   checkBox1.setText("option1");
   checkBox2.setText("option2");
   checkBox3.setText("option3");
   checkBox4.setText("option4");
}

将以上所有视图名称替换为您的名称

Answer 3

1. 如果您使用的是 RadioGroup，那么当 NextQestion 按钮首先被点击时 clear [=14] 的状态=]调用方法RadioGroup.clearCheck()。

2. 从您的 database 或其他地方获取下一个 question 并将值设置为您的 TextView 和 RadioButtons.

举个例子：

public class Main2Activity extends AppCompatActivity {

    TextView textQuestion;
    RadioGroup radioGroup;
    RadioButton radioButton1,radioButton2,radioButton3;
    Button buttonNextQuestion;

    int questionNo = 1;

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

        textQuestion = (TextView) findViewById(R.id.text_question); 
        radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
        radioButton1 = (RadioButton) findViewById(R.id.radioButton1);
        radioButton2 = (RadioButton) findViewById(R.id.radioButton2);
        radioButton3 = (RadioButton) findViewById(R.id.radioButton3);
        buttonNextQuestion = (Button) findViewById(R.id.button_next_question);

        buttonNextQuestion.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                questionNo++;
                loadNextQuestion();
            }
        });
    }

    public void loadNextQuestion() {

        String question, option1, option2, option3, option4;

        // Get question and options from database or from other place
        // and store into >> question, option1, option2, option3, option4

        // Update UI
        // Clear radio button state
        radioGroup.clearCheck();

        // Set new question and its options to view
        textQuestion.setText(question);
        radioButton1.setText(option1);
        radioButton2.setText(option2);
        radioButton3.setText(option3);
        radioButton4.setText(option4);
    }
}

在一个 activity 内使用单选按钮

Use RadioButtons within one activity

android

radio-button

android-radiobutton