radio button recyclerview

gistfile1.java

abstract class RadioAdapter<T> extends RecyclerView.Adapter<RadioAdapter.ViewHolder> {

    public int mSelectedItem = -1;
    private Context mContext;
    private List<T> mItems;

    public RadioAdapter(Context context, List<T> items) {
        mContext = context;
        mItems = items;
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, final int i) {
        viewHolder.mRadio.setChecked(i == mSelectedItem);
    }

    @Override
    public int getItemCount() {
        return mItems.size();
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        final View view = LayoutInflater.from(mContext).inflate(R.layout.view_radio_item, viewGroup, false);
        return new ViewHolder(view);
    }

    public class ViewHolder extends RecyclerView.ViewHolder {

        public RadioButton mRadio;
        public TextView mText;

        public ViewHolder(final View inflate) {
            super(inflate);
            mText = (TextView) inflate.findViewById(R.id.text);
            mRadio = (RadioButton) inflate.findViewById(R.id.radio);
            View.OnClickListener l = v -> {
                mSelectedItem = getAdapterPosition();
                notifyItemRangeChanged(0, mItems.size());
            };
            itemView.setOnClickListener(l);
            mRadio.setOnClickListener(l);
        }
    }

}

please describe the purpose of this class :)

Having a RadioButton without a RadioGroup in a RecyclerView. The TextView is just required if you want to have some special appearance, RadioButton has a setText method.

What is this itemView.setOnClickListener(l);

Thank you very much. well itemView is inflate in your context, Hope you change it.

Android Studio doesn't support Java 8, so how did you get your lambda expression to compile (starting at line 37)?

@scottbiggs I would assume via Retrolambda

How then you are going to get the selected item in the class using this adapter class?

@mutexkid thanks

Thank u

Thank you so much, it helped me not to do it stupidly.

thanks, this clean my issue

I used the tutorial above. I have 3 radio buttons. when I checked on the 4x radio button it couldn't be checked but in the log it managed to bring up the index and text of the radio button