Question

当有人点击了RadioButton中的RadioButton时，我想停止对RadioGroup的第二次点击。如果有人单击2次，则用户无法更改所选的单击。我试图用boolean来阻止它，但它不起作用。我哪里错了？

这是我的代码：

radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            // checkedId is the RadioButton selected
            rb = (RadioButton) findViewById(checkedId);

            user_radio_answer = (String) rb.getText();

            rb.setOnClickListener(new View.OnClickListener() {

                private boolean isChecked = true;
                @Override
                public void onClick(View v) {

                    if (isChecked) {
                        if (rb.isChecked() ) {

                            isChecked = false;
                        }
                    }
                    if (correct_answer1.equals(user_radio_answer)) {
                        rb.setBackgroundColor(Color.GREEN);
                        //  Toast.makeText(getApplicationContext(), "Correct ☺ : " + user_radio_answer, Toast.LENGTH_LONG).show();
                    } else {
                        Toast.makeText(getApplicationContext(), "Incorrect Answer :( ..Correct Answer :  " + correct_answer1, Toast.LENGTH_LONG).show();
                        rb.setBackgroundColor(Color.parseColor("#FF5733"));
                        answer1 = rb_answer1.getText().toString();
                        answer2 = rb_answer2.getText().toString();
                        answer3 = rb_answer3.getText().toString();
                        answer4 = rb_answer4.getText().toString();

                        if (answer1.equals(correct_answer1)) {
                            rb_answer1.setBackgroundColor(Color.GREEN);
                        }
                        if (answer2.equals(correct_answer1)) {
                            rb_answer2.setBackgroundColor(Color.GREEN);
                        }
                        if (answer3.equals(correct_answer1)) {
                            rb_answer3.setBackgroundColor(Color.GREEN);
                        }
                        if (answer4.equals(correct_answer1)) {
                            rb_answer4.setBackgroundColor(Color.GREEN);
                        }


                    }

                    new RadioHttpAsyncTask().execute("http:xxxxxx-xxxxxxxxxx-xxxxxxxx");
                }
            });
        }
    });

Answer 1

请记住他们是否回答了问题，并记住产生第一个答案的视图（RadioButton），并在点击RadioButton时再次检查RadioButton。这假设RadioGroup中的所有RadioButtons都具有相同的onClick方法。

boolean answered = false;
RadioButton radioAnswer;
public void answer1(View view) {
    if (!answered) {
        radioAnswer = (RadioButton) view;
        answered = true;
    } else {
        radioAnswer.setChecked(true);
    }
}

Answer 2

您可以在点击停止收听点击事件后将其停用

rb.setEnabled(false);

编辑：

或者，您可以在点击后点击

删除点击监听器

rb.setOnClickListener(null);

Answer 3

您可以添加两种方法，然后在需要时调用它们。您可以添加条件，如果选中了radiobutton，则禁用该组，如果未选中，则将其设置为启用。清除无线电组时，也可以设置按钮启用。

public void disableRG() {
    for(int i = 0; i < radioGroup.getChildCount(); i++){
        ((RadioButton)radioGroup.getChildAt(i)).setEnabled(false);
    }
}

 public void enableRG() {
        for(int i = 0; i < radioGroup.getChildCount(); i++){
            ((RadioButton)radioGroup.getChildAt(i)).setEnabled(true);
        }
    }

Answer 4

也许你可以设置一个全局布尔标志。

  `private boolean alreadyChecked = false;
   radioGroup.setOnCheckedChangeListener(new    
   RadioGroup.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        // checkedId is the RadioButton selected
        rb = (RadioButton) findViewById(checkedId);

        user_radio_answer = (String) rb.getText();

        if (!alreadyChecked) {

          rb.setOnClickListener(new View.OnClickListener() {

              private boolean isChecked = true;
              @Override
              public void onClick(View v) {

                  if (isChecked) {
                      if (rb.isChecked() ) {

                          isChecked = false;
                      }
                  }
                  if (correct_answer1.equals(user_radio_answer)) {
                      rb.setBackgroundColor(Color.GREEN);
                      //  Toast.makeText(getApplicationContext(), "Correct ☺ : " + user_radio_answer, Toast.LENGTH_LONG).show();
                  } else {
                      Toast.makeText(getApplicationContext(), "Incorrect Answer :( ..Correct Answer :  " + correct_answer1, Toast.LENGTH_LONG).show();
                      rb.setBackgroundColor(Color.parseColor("#FF5733"));
                      answer1 = rb_answer1.getText().toString();
                      answer2 = rb_answer2.getText().toString();
                      answer3 = rb_answer3.getText().toString();
                      answer4 = rb_answer4.getText().toString();

                      if (answer1.equals(correct_answer1)) {
                          rb_answer1.setBackgroundColor(Color.GREEN);
                      }
                      if (answer2.equals(correct_answer1)) {
                          rb_answer2.setBackgroundColor(Color.GREEN);
                      }
                      if (answer3.equals(correct_answer1)) {
                          rb_answer3.setBackgroundColor(Color.GREEN);
                      }
                      if (answer4.equals(correct_answer1)) {
                          rb_answer4.setBackgroundColor(Color.GREEN);
                      }


                  }

                  new RadioHttpAsyncTask().execute("http:xxxxxx-xxxxxxxxxx-xxxxxxxx");
              }
              alreadyChecked = true;
          });
         }
    }
});`

如果已经在Android中点击了单选按钮，如何防止二次单击？

4 个答案: