如何检查所有RadioGroup？

Question

I have RecyclerView With 60 Item. that Items Have RadioGroup and In this Have Two radio button

I use DataBinding Too

I Have FabButton And If Click On THis I will Go To Result Activity But If all RadioGroup Checked :)

I write Like This code And It is work but Has some bug ... When I click On 60th Item Even Do not Check 59 Item I will go to Result Activity.

why ?

This Is My code:

//Select All Radio Group
public boolean allSelected() {
    boolean allChecked = true;
    for (Question question : questions) {
        allChecked = question.getSelectedId() != 0;
    }
    return allChecked;
}

//Card background if Uncheck the question
private void showHideErrorBackground(boolean show) {
    for (Question question : questions) {
        question.setShowErrorBackground(show);
    }
    mbtiQuestAdapter.notifyDataSetChanged();
}

---

and like it I use This Method :

if (allSelected()) {

  Intent intent = new Intent(MbtiQuestionActivity.this, ResultActivity.class);

        startActivity(intent);

} else {
        snack bar =
          Snackbar.make(coordinator, R.string.check_all_ques_err, Snackbar.LENGTH_SHORT)

            .setAction(R.string.snack_find_unchecked_ques, new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                showHideErrorBackground(true);
              }
            });

        ViewCompat.setLayoutDirection(snackbar.getView(), ViewCompat.LAYOUT_DIRECTION_RTL);
        snackbar.show();
}

---

Question.java (Model data)

public class Question extends BaseQuestion {

  private int selectedId;
  private boolean showErrorBackground;

  @Bindable
  public void setShowErrorBackground(boolean showErrorBackground) {
    this.showErrorBackground = showErrorBackground;
    notifyPropertyChanged(BR.showErrorBackground);
  }

  @Bindable
  public int getSelectedId() {
    return selectedId;
  }

  public void setSelectedId(int selectedId) {
    this.selectedId = selectedId;
    notifyPropertyChanged(BR.selectedId);
  }

  public boolean isShowErrorBackground() {
    return showErrorBackground;
  }
}

Thank you for help me

Answer 1

Inside your allSelected method, you are directly setting the value of the variable allChecked to be the checked state of the current question in the loop. This means as long as the last question is checked, the value of allChecked will be true . Similarly, if it weren't checked, it would always be false , but that is in line with your app's behaviour, so you might not have faced any issues.

Instead, you should be using an AND operation as follows:

allChecked = allChecked && (question.getSelectedId() != 0);

Since your for loop should break if any question is unanswered, you can optimize the code by doing this:

for (Question question : questions) {
      if (question.getSelectedId() == 0) {
          allChecked = false;
          break;
      }
}

In this code, allChecked will be set to false as soon as an unanswered question is encountered, and the rest of the questions will be skipped. You need not use an AND operation each iteration.

Answer 2

The boolean returned by this method is just the value of the last question.getSelectedId().

public boolean allSelected() {
    boolean allChecked = true;
    for (Question question : questions) {
       allChecked = question.getSelectedId() != 0;
    }
    return allChecked;
}

Try this :

public boolean allSelected() {
    for (Question question : questions) {
        if (question.getSelectedId() == 0)
            return false;
    }
    return true;
}