Restricting user to MultiSelect <=5 items only in cardview android-CodePudding

Here is the code for Adapter. Cards change color on selection. I want the user to select <= 5 cards only. How can I restrict? The user should not be allowed to select more than 5 cards.

 @Override
public void onBindViewHolder(final OptionsViewHolder holder, int position) {
    final OptionModel option=Options.get(position);
    holder.OptionName.setText(option.getName());
    holder.iv_card.setColorFilter(option.isSelected()? holder.item_view.getResources().getColor(R.color.Yellow) : holder.item_view.getResources().getColor(R.color.Dark_Blue));
   if(!Disabled){
       holder.iv_card.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View view) {
                   option.setSelected(!option.isSelected());
                   holder.iv_card.setColorFilter(option.isSelected() ? view.getResources().getColor(R.color.Yellow) : view.getResources().getColor(R.color.Dark_Blue));
           }
       });
   }else {
       holder.iv_card.setOnClickListener(null);
   }

}

CodePudding user response：

Based your question try to make some changes, like declare an global variable in adapter and then use that variable.

    int selectedCards=0;
@Override
public void onBindViewHolder(final OptionsViewHolder holder, int position) {
    final OptionModel option=Options.get(position);
    holder.OptionName.setText(option.getName());
    holder.iv_card.setColorFilter(option.isSelected()? holder.item_view.getResources().getColor(R.color.Yellow) : holder.item_view.getResources().getColor(R.color.Dark_Blue));
    if(!Disabled){
        holder.iv_card.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(selectedCards<=5) {
                    selectedCards  ;
                    option.setSelected(!option.isSelected());
                    holder.iv_card.setColorFilter(option.isSelected() ? view.getResources().getColor(R.color.Yellow) : view.getResources().getColor(R.color.Dark_Blue));
                }
            }
        });
    }else {
        holder.iv_card.setOnClickListener(null);
    }

if you are de-selecting any card then on de-select make sure you are decreasing the global variable's value as

selectedCards--;

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