Android RecyclerView and custom Adapter position elements changes

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I have a RecylcerView filled with a Custom Adapter recylerView.setAdapter(myAdapter), and the adaper is filled with different elements by an ArrayList. In the ViewHolder i overrided the public void onBindViewHolder(@NonNull ViewHolder viewHolder, int position) method. In the custom ViewHolder i put a button. The button has a click listener on it. When i click the button i read the variable position and i am facing that the variable changes every time i click the same button. Why this happens?

Thanks to everyone helping me to understand



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