Android Recyclerview Addition & Removal of Items

Android RecyclerView addition & removal of items

I have done something similar.
In your MyAdapter:

public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
    public CardView mCardView;
    public TextView mTextViewTitle;
    public TextView mTextViewContent;
    public ImageView mImageViewContentPic;
    
    public ImageView imgViewRemoveIcon;
    public ViewHolder(View v) {
        super(v);
        mCardView = (CardView) v.findViewById(R.id.card_view);
        mTextViewTitle = (TextView) v.findViewById(R.id.item_title);
        mTextViewContent = (TextView) v.findViewById(R.id.item_content);
        mImageViewContentPic = (ImageView) v.findViewById(R.id.item_content_pic);
        //......
        imgViewRemoveIcon = (ImageView) v.findViewById(R.id.remove_icon);

        mTextViewContent.setOnClickListener(this);
        imgViewRemoveIcon.setOnClickListener(this);
        v.setOnClickListener(this);
        mTextViewContent.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                if (mItemClickListener != null) {
                    mItemClickListener.onItemClick(view, getPosition());
                }
                return false;
            }
        });
    }


    @Override
    public void onClick(View v) {
        //Log.d("View: ", v.toString());
        //Toast.makeText(v.getContext(), mTextViewTitle.getText() + " position = " + getPosition(), Toast.LENGTH_SHORT).show();
        if(v.equals(imgViewRemoveIcon)){
            removeAt(getPosition());
        }else if (mItemClickListener != null) {
            mItemClickListener.onItemClick(v, getPosition());
        }
    }
}

public void setOnItemClickListener(final OnItemClickListener mItemClickListener) {
    this.mItemClickListener = mItemClickListener;
}
public void removeAt(int position) {
    mDataset.remove(position);
    notifyItemRemoved(position);
    notifyItemRangeChanged(position, mDataSet.size());
}

Edit:

getPosition() is deprecated now, use getAdapterPosition() instead.

How to remove item from recyclerView in android

I think you should call remove(holder.getAdapterPosition()) instead of remove(position) because, when the holder's countdown finishes, it might have changed its position.

Suppose the following situation:

1º holder -> 5 seconds countdown

2º holder -> 10 seconds countdown

Since the second holder finishes after the first one, after 10 seconds, remove(1) will be called but, since the first holder has already been removed, the second holder's position will be 0. Hence, it should call remove(0) instead of remove(1) (which will cause an IndexOutOfBoundsException).

Remove certain items which are empty from RecyclerView list?

I suggest performing that removal logic in the constructor of the adapter rather than in onBind. onBind happens as the recycler view is finalising the details of each view holder immediately before it's shown to the user. You want to do as little as possible logic in here to keep the recycler view performant.

Inside the constructor (or even before the list is passed in) you should perform a loop and remove those items that don't meet the criteria before setting the instance variable.

It's been a long time since I wrote code in java and so I'd end up with unhelpful incorrect syntax if I tried to do it here.

How to remove items from recyclerview adapter

Try this would work notifyItemRemoved(position)

holder.canBtn.setOnClickListener(v -> {
    cancelConfirmation(position);
});

Then pass as parameter of the current position as below cancelConfirmation(int position) and finally when the response is successful remove the item as below

if (response.isSuccessful()) {
    mData.remove(position)
    notifyItemRemoved(position);
}

Take a look at the official documentation

items not removed correctly from RecyclerView

Corresponding to your code it's expected behaviour. So, your code fetches files data from device file system in onCreate() method of your activity and creates a list of representation of the files.
When recordingArrayList.remove(position); is invoked, it removes item from the representation list, but not file from file system.
When you call another activity and goes back, activity with the list is created again and onCreate() is called again and your code fetches again all the files from device file system and shows it in a list.
Possible solution can be: remove file from file system, if you have read-write access to this folder or save a list in your app. For example, in Room database and add to your file representation field isDeleted and use data from database to show in a list.

Hope it helps!

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