title: How to correct the manipulation of elements in the child view in expandableListView android, when changing data in the item?
body: <p>I have this view with each item and, when I want to change the status due to an interaction, that item changes and also affects the others that are in the other view groups, but in different positions, in fact every 3 positions.</p>
  
  <p>When updating the textView, other elements are updated as well, which should not be modified.</p>
  
  <p>This image, show how is working the update on view.
  Don't worry about the data, it's simulated for development.</p>
  
  <p><a href="https://i.postimg.cc/156kJRbM/ndice.jpg" rel="nofollow noreferrer">https://i.postimg.cc/156kJRbM/ndice.jpg</a></p>
  
  <pre><code>@Override
  public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild,
                           View convertView, final ViewGroup parent) {
  
      if (convertView == null) {
          convertView = inflater.inflate(R.layout.item_task, null);
      }
  
      final Task task = getChild(groupPosition, childPosition);
      nameTask.setText(task.getTask());
  
  
      final  TextView nameTask = (TextView) convertView.findViewById(R.id.nameTask);
      final  TextView tvDurationTask = (TextView) convertView.findViewById(R.id.tvDurationTask);
      final  TextView tvTimeRemining = (TextView) convertView.findViewById(R.id.tvTimeRemining);
      final View identifier = (View) convertView.findViewById(R.id.identifier);
      final LinearLayout taskItem = convertView.findViewById(R.id.taskItem);
      final LinearLayout btnStartTask = convertView.findViewById(R.id.btnStartTask);
  
      tvDurationTask.setText(pomodorosTask[task.getPomodoros()]);
  
      taskItem.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
              mClickListener.onClickListener(task);
          }
      });
  
      btnStartTask.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View view) {
              notifyDataSetChanged();
              //Here I want to update a view, but change another item too
              mClickListener.onStartPomodoro(task, view, tvTimeRemining);
          }
      });
  
      return convertView;
  
  }
  </code></pre>
  
  <p>`</p>