How to Select Just One Radiobutton With Recyclerview Android

Select only one radiobutton in a recyclerview

Here is another method to do the same. This is more elegant than my previous answer. But I have kept both as the previous answer provides more flexibility.

private RadioButton lastCheckedRB = null;
...
@Override
public void onBindViewHolder(final CoachListViewHolder holder, final int position) {
   holder.priceRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            RadioButton checked_rb = (RadioButton) group.findViewById(checkedId);
            if (lastCheckedRB != null) {
                lastCheckedRB.setChecked(false);
            }
            //store the clicked radiobutton
            lastCheckedRB = checked_rb;
        }
    });

Single selection in RecyclerView

The solution for the issue:

public class yourRecyclerViewAdapter extends RecyclerView.Adapter<yourRecyclerViewAdapter.yourViewHolder> {

    private static CheckBox lastChecked = null;
    private static int lastCheckedPos = 0;


    public void onBindViewHolder(ViewHolder holder, final int position) {
    
        holder.mTextView.setText(fonts.get(position).getName());
        holder.checkBox.setChecked(fonts.get(position).isSelected());
        holder.checkBox.setTag(new Integer(position));

        //for default check in first item
        if(position == 0 && fonts.get(0).isSelected() && holder.checkBox.isChecked())
        {
           lastChecked = holder.checkBox;
           lastCheckedPos = 0;
        }
           
        holder.checkBox.setOnClickListener(new View.OnClickListener() 
        {
            @Override
            public void onClick(View v) 
            {
               CheckBox cb = (CheckBox)v;
               int clickedPos = ((Integer)cb.getTag()).intValue(); 

               if(cb.isChecked())
               {
                  if(lastChecked != null)
                  {
                      lastChecked.setChecked(false);
                      fonts.get(lastCheckedPos).setSelected(false);
                  }                       
                 
                  lastChecked = cb;
                  lastCheckedPos = clickedPos;
              }
              else
                 lastChecked = null;

              fonts.get(clickedPos).setSelected(cb.isChecked);
           }
       });
    }
}

Single choice Radion Button in Recycler view (Duplicate)

Add your onCheckedChnageListener() in your onBindViewHolder() method and maintain your mSelectedItem inside the onCheckedChnageListener()

 viewHolder.rdCategoryItem.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
             mSelectedItem=position;
             notifyDataSetChanged();
            }
        });

How to select one radio button from radiogroup in a RecylcerView in android?

Use an interface as a listener of radio button click.

public interface AnswerSelectedListener {
    void answerSelected(String answer);
}

Add an AnswerSelectedListener class attribute to your DailyQuestionModel class and constructor & Pass an implementation of this interface to each of your DailyQuestionModel:

questionList.add(new DailyQuestionModel(
    getResources().getString(R.string.q01),
    new AnswerSelectedListener() {
        @Override
        public void answerSelected(String answer) {
            //Here you have the selected answer to question 01
        }
    })
)

Inside you RecyclerView adapter, call this listener when an answer is selected:

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
    final DailyQuestionModel model = questionList.get(position);
    String question = model.getQuestion();
    holder.questionText.setText(question);
    answers.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            RadioButton checkedRadioButton = (RadioButton)group.findViewById(checkedId);
            boolean isChecked = checkedRadioButton.isChecked();
            if (isChecked) {
                model.answerListener.answerSelected(checkedRadioButton.getText()))
            }
        }
    });
}

This code is not tested but I think it gives the overall flow.

android - Single RadioButton in RecyclerView

You can manage it by creating a model class with a boolean variable isChecked.

when you select a RadioButton first do isChecked = false for all and then make true for your selected button and then call notifyDataSetChanged.

In adapter use

radioButton.setChecked(list.get(position).isChecked())

It will help you definitely.

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