title: Checking checkboxes in RecyclerView
body: <p>I'm trying to add some checkboxes my recyclerview, anytime that I scroll the list, all checkboxes will be checked and unchecked! on creating the list, I need to make some checkboxes checked by default and I don't want to all checkboxes to be unchecked or checked when I scroll the list.</p>
  
  <pre><code> @Override
      public Holder onCreateViewHolder(ViewGroup viewGroup) {
          View view = LayoutInflater.from(viewGroup.getContext())
                                    .inflate(R.layout.inf_add_manager, viewGroup, false);
          Holder holder = new Holder(view, true);
  
          holder.checkbox.setOnCheckedChangeListener(this);
  
          for (Profile profile : mProfiles) {
              if (mComplex.getManagersId().contains(profile.getId()) &amp;&amp; !checkedContactsId.contains
                      (profile.getId())) {
                  checkedContactsId.add(profile.getId());
              }
          }
  
          return holder;
      }
  
  @Override
      public void onBindViewHolder(Holder holder, int position) {
          Profile item = mProfiles.get(position);
  
          holder.checkbox.setTag(item.getId());
  
          holder.checkbox.setChecked(checkedContactsId.contains(item.getId()));
      }
  
  @Override
      public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
          if (isChecked) {
              checkedContactsId.add((String) buttonView.getTag());
          } else {
              checkedContactsId.remove(buttonView.getTag());
          }
      }
  </code></pre>