要實現滑動刪除功能，您需要使用ItemTouchHelper類。以下是實現滑動刪除的步驟：

1. 首先，確保您的項目已經添加了RecyclerView支持庫的依賴項。在app的build.gradle文件中添加以下依賴：

dependencies {
    implementation 'androidx.recyclerview:recyclerview:1.2.1'
}

2. 創建一個適配器類，繼承自RecyclerView.Adapter，并實現必要的方法。在這個類中，您需要定義一個接口來處理滑動事件：

public interface OnItemSwipeListener {
    void onItemSwiped(int position);
}

3. 在適配器類中添加一個OnItemSwipeListener成員變量，并在構造函數中接收一個實例。然后，在onBindViewHolder方法中設置滑動監聽器：

private OnItemSwipeListener mListener;

public MyAdapter(OnItemSwipeListener listener) {
    mListener = listener;
}

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
    holder.itemView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                mStartX = event.getX();
                mStartY = event.getY();
            } else if (event.getAction() == MotionEvent.ACTION_UP) {
                float endX = event.getX();
                float endY = event.getY();
                float deltaX = endX - mStartX;
                float deltaY = endY - mStartY;

                if (Math.abs(deltaX) > Math.abs(deltaY)) {
                    if (deltaX > 0) {
                        if (mListener != null) {
                            mListener.onItemSwiped(position);
                        }
                    } else {
                        // Handle left swipe
                    }
                } else {
                    if (deltaY > 0) {
                        // Handle down swipe
                    } else {
                        // Handle up swipe
                    }
                }
            }
            return false;
        }
    });
}

4. 在您的Activity或Fragment中，創建一個ItemTouchHelper.Callback子類，并重寫onInterceptTouchEvent和onMove方法：

private class MyItemTouchHelperCallback extends ItemTouchHelper.Callback {

    private final MyAdapter mAdapter;

    public MyItemTouchHelperCallback(MyAdapter adapter) {
        mAdapter = adapter;
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent e) {
        return false;
    }

    @Override
    public void onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
    }

    @Override
    public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
        if (viewHolder instanceof MyViewHolder) {
            mAdapter.notifyItemRemoved(viewHolder.getAdapterPosition());
            mAdapter.notifyItemRangeChanged(viewHolder.getAdapterPosition(), mAdapter.getItemCount());
        }
    }
}

5. 在Activity或Fragment中，初始化ItemTouchHelper并附加到RecyclerView：

MyAdapter mAdapter = new MyAdapter(/* pass your data here */);
RecyclerView recyclerView = findViewById(R.id.recycler_view);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(mAdapter);

ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new MyItemTouchHelperCallback(mAdapter));
itemTouchHelper.attachToRecyclerView(recyclerView);

現在，當用戶滑動列表項時，將觸發onSwiped方法，從而刪除相應的列表項。您可以根據需要自定義刪除動畫和其他細節。