CODEWITHSUNDEEP
androidandroid-recyclerviewradio-button
hossam rakha
hossam rakha

Reputation: 253

how to select just one RadioButton with RecyclerView android?

I have a RecyclerView with RadioButton I just want to select one RadioButton not many in the same time and my code make it works fine, but when I repeat the selection from top to bottom the select disappear how can I fix it please thanks.

enter image description here

private RadioButton lastCheckedRB = null;

 @Override
public void onBindViewHolder(final MyViewHolder holder, int position) {
    ContactUsModel contactUsModel = orderList.get(position);
    holder.orderNum.setText(contactUsModel.getOrderNum());
    holder.orderCost.setText(contactUsModel.getOrderCost());

    holder.radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {
            RadioButton checked_rb = (RadioButton) group.findViewById(checkedId);

            if (lastCheckedRB != null &&lastCheckedRB.isChecked()) {
                lastCheckedRB.setChecked(false);
            }
            //store the clicked radiobutton
            lastCheckedRB = checked_rb;


        }
    });

Upvotes: 4

Views: 10455

Answers (5)

Wade
Wade

Reputation: 45

I know I am way way way late to reply to this thread but if anyone in the future gets stuck in a similar problem please use the below example to resolve it, especially with RadioButton on RecyclerView :

At the TOP:

        //initialize as Global variable below variable

        int lastSelectedPosition = -1;// you can use any value but keep it 
         //at negative because array numbering starts at the positive
        int tempPosition;
        
        //Below code inside onBindViewHolder() function of RecyclerView
        //selectedRadio is my RadioButton

        holder.selectedRadio.setOnCheckedChangeListener(new 
        CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, 
             boolean b) 
             {

            tempPosition = position;//getting position of click radioButton

            if (lastSelectedPosition != position)//checking last position 
               //and present position
            {
                holder.selectedRadio.setChecked(true);
                
                if (lastSelectedPosition != -1){
                   
                   //very Important code below line where the magic happens
                   notifyItemChanged(lastSelectedPosition);

                }

                lastSelectedPosition = tempPosition;
            }
        }
    });

That's all, waaalaaaa..Tat tara raaaaaa... now your radio button is working as you have wanted it.

Thank you.

Upvotes: -1

Cassian
Cassian

Reputation: 121

You don't need keep the position with Tag or to reload the list with notifyDataSetChanged(). Just use checkedRadioButton and toggle it. Then you can use checkedRadioButton to get the selected item.

private var checkedRadioButton: CompoundButton? = null

override fun onBindViewHolder(holder: ViewHolder, position: Int) {
    holder.itemView.radio_button.setOnCheckedChangeListener(checkedChangeListener)
    if (holder.itemView.radio_button.isChecked) checkedRadioButton = holder.itemView.radio_button
}

private val checkedChangeListener = CompoundButton.OnCheckedChangeListener { compoundButton, isChecked ->
    checkedRadioButton?.apply { setChecked(!isChecked) }
    checkedRadioButton = compoundButton.apply { setChecked(isChecked) }
}

Upvotes: 8

Adeeb karim
Adeeb karim

Reputation: 302

1st: get individual radio button id. 2nd: assign click listener to individual radio button.

say you have 6 radio buttons:

{



radioButton1.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {

                        radioButton1.setChecked(true);
                        radioButton2.setChecked(false);
                        radioButton3.setChecked(false);
                        radioButton4.setChecked(false);
                        radioButton5.setChecked(false);
                        radioButton6.setChecked(false);
                    }
                });

//similarly add listeners to all radio buttons:

radioButton2.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {

                        radioButton2.setChecked(true);
                        radioButton1.setChecked(false);
                        radioButton3.setChecked(false);
                        radioButton4.setChecked(false);
                        radioButton5.setChecked(false);
                        radioButton6.setChecked(false);
                    }
                });


}

Upvotes: -5

Sanjay Kumar
Sanjay Kumar

Reputation: 1185

You can do as,Use RadioButton I just write without check But this is an hint for you - 

 private CompoundButton lastCheckedRB = null;

@Override
public void onBindViewHolder(final MyViewHolder holder, int position) {
    ContactUsModel contactUsModel = orderList.get(position);
    holder.orderNum.setText(contactUsModel.getOrderNum());
    holder.orderCost.setText(contactUsModel.getOrderCost());
    holder.readioBtn.setOnCheckedChangeListener(ls);
    holder.readioBtn.setTag(position);
}

private OnCheckedChangeListener ls = (new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton buttonView,
                                 boolean isChecked) {
        int tag = (int) buttonView.getTag();
        ;
        if (lastCheckedRB == null) {
            lastCheckedRB = buttonView;
        } else if (tag != (int) lastCheckedRB.getTag()) {
            lastCheckedRB.setChecked(false);
            lastCheckedRB = buttonView;
        }

    }
});

Upvotes: 11

Anil
Anil

Reputation: 1614

Use One temp Variable in your orderList

ex: isSelected = false;

Make sure this is added in all object of your arrayList

When u selects any radio button just update current position orderList isSelected = true and remaining isSelected = false;

and call notifyDataSetChanged()

also make sure you are checking 

if(isSelcted)
redioButton.setChecked(true);
else
redioButton.setChecked(false);

ex: if(csSelectedAddressPos == position) holder.radioBtn.setChecked(true); else holder.radioBtn.setChecked(false);

        holder.radioBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //set object isChecked here 
                csSelectedAddressPos = position;
                notifyDataSetChanged();
            }
        });

Upvotes: 1

Related Questions