我在SimpleItemTouchHelper类中以以下方式覆盖方法onChildDraw：

@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);
    }
}

当您向左或向右滑动时，这仅启用淡入淡出动画。

在我的适配器中，我已经实现了ItemTouchHelperAdapter并通过以下方式覆盖onItemDismiss以便显示AlertDialog来确认是否要删除所选元素：>

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();

    }
...
}

一切正常，问题在于，如果我按“取消”按钮，则滑动的项目消失，仅当我重新进入活动时才再次出现。

当我按取消或退出对话框时，如何恢复原始位置？