Update items in adapter when other item clicked

Question

I am in stuck with pretty easy thing.

I have an activity with Fragment which includes RecyclerView and custom adapter with items. This activity is about radio stations.

So in my adapter I have several items with Play-Stop button. When I click on the button there is "play" symbol. One more click on those button - there will be "stop" button. This logic works.

BUT if I will click on other item, on other Play-Stop button, all previously clicked items will save different states, so I want to change state for previous clicked item - only current clicked item with current position can have different Play-Stop button. How can I get it?

I have tried some notify...() methods but without result that I want. I think I am trying notify adapter in the wrong places.

            holder.LLPLayStop.setOnClickListener(v->{
                if (isPlay[0] == false) {
                    isPlay[0] = true;
                    try {
                        if (mp != null) {
                            mp.stop();
                            mp.release();
                        }
                        mp = new MediaPlayer();
                        mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
                        mp.setDataSource("http://cast.radiogroup.com.ua:8000/avtoradio");
                        mp.prepareAsync();
    //                    notifyDataSetChanged();
                        holder.PBLoading.setVisibility(View.VISIBLE);
                        holder.list_item_play_stop.setVisibility(View.GONE);
                        mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                            public void onPrepared(MediaPlayer mp) {
                                mp.start();
                                holder.PBLoading.setVisibility(View.GONE);
                                holder.list_item_play_stop.setVisibility(View.VISIBLE);
                                holder.list_item_play_stop.setImageDrawable(mContext.getResources().getDrawable(R.drawable.radio_stop));
                            }
                        });
                    } catch (IOException e) {
                        Log.e(TAG, "prepare() failed");
                    }
                } else {
                    isPlay[0] = false;
                    mp.stop();
                    mp.release();
                    mp = null;
//                    notifyDataSetChanged();
                    holder.list_item_play_stop.setImageDrawable(mContext.getResources().getDrawable(R.drawable.radio_play));
                }
//                notifyItemChanged(position);
            });

Answer 1

you need to keep playing index and check each time on click, for all rows. so you need variable to keep clicked row, like this:

in your adapter:

private Integer selectedPos = -1;

in onClick of play/stop button:

{
   selectedPos = position;
   notifyDataSetChanged(); // notify list , then each row can handle it's state base on selectedPos
}

and finally check playing row in onBindViewHolder:

 if(selectedPos == position){ // position is the current row position
     //this row is selected for playing...
     //do appropriate works
 } else{
     //this row is not select for play so change button style to normal
 }