Android ItemTouchHelper onChildDraw make itemView return to its original position

Question

I override in SimpleItemTouchHelper class the method onChildDraw the following way:

@Override
public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
    if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {
        float width = (float) viewHolder.itemView.getWidth();
        float alpha = 1.0f - Math.abs(dX) / width;
        viewHolder.itemView.setAlpha(alpha);
        viewHolder.itemView.setTranslationX(dX);
    } else {
        super.onChildDraw(c, recyclerView, viewHolder, dX, dY,
                actionState, isCurrentlyActive);
    }
}

This simply enables a fade in animation when you swipe to left or right .

In my adapter, I've implemented the ItemTouchHelperAdapter and override onItemDismiss the following way in order to show an AlertDialog to confirm if you want to remove the selected element:

public class TeambuilderAdapter extends RecyclerView.Adapter<TeambuilderAdapter.ViewHolder> implements ItemTouchHelperAdapter {

    @Override
    public void onItemDismiss(int position) {

        DialogInterface.OnClickListener dialogClickListener =(dialog, which) -> {
            if (which == DialogInterface.BUTTON_POSITIVE) {
                mData.remove(position);
                notifyItemRemoved(position);
                ((PokemonTeambuilderTabActivity) mContext).refreshTeamList();
            }
        };

        new AlertDialog . Builder (mContext)
                .setTitle(mContext.getString(R.string.remove_team))
                .setMessage(mContext.getString(R.string.remove_team_question))
                .setPositiveButtonIcon(ContextCompat.getDrawable(mContext, R.drawable.ic_baseline_check_circle_14))
                .setPositiveButton(mContext.getString(R.string.confirm), dialogClickListener)
                .setNegativeButtonIcon(ContextCompat.getDrawable(mContext, R.drawable.ic_baseline_cancel_14))
                .setNegativeButton(mContext.getString(R.string.decline), dialogClickListener)
                .show();

    }
...
}

All is working, the problem resides that if I press the cancel button, the item swiped disappears and only appears again when I re-enter the activity.

How can I restore the original position when I press cancel or I leave the dialog?

Answer 1

Your dialogClickListener is not handling the cancel button action.
For the cancel action, get your itemView and setTranslationX(0) and setAlpha(1).