사용자 정의 RecyclerView QQ 슬라이딩 삭제 버튼

[본고는 안드로이드에서 RecyclerView를 기반으로 한 Item 사이드 슬라이딩 삭제를 전재합니다] 사용자 정의 RecyclerView를 통해 이루어진 효과는 item 왼쪽 슬라이딩 디스플레이 삭제 단추를 누르고 삭제를 누르면 두 인터페이스가 호출에 사용됩니다.실측 사용 가능
여기에 사용자 정의 RecyclerView가 붙었는데, 레이아웃 파일과 ViewHolder가 붙지 않았습니다

import android.content.Context;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.animation.LinearInterpolator;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;


public class MyRecyclerView extends RecyclerView {
    private Context mContext;

    //       
    private int mLastX, mLastY;
    //     item   
    private int mPosition;

    //item     
    private RelativeLayout mItemLayout;
    //    
    private TextView mDelete;

    //      (        )
    private int mMaxLength;
    //         
    private boolean isDragging;
    //item         
    private boolean isItemMoving;

    //item        
    private boolean isStartScroll;
    //         0：   1：     2：     3：  
    private int mDeleteBtnState;

    //             
    private VelocityTracker mVelocityTracker;
    private Scroller mScroller;
    private OnItemClickListener mListener;

    public MyRecyclerView(Context context) {
        this(context, null);
    }

    public MyRecyclerView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public MyRecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        mContext = context;

        mScroller = new Scroller(context, new LinearInterpolator());
        mVelocityTracker = VelocityTracker.obtain();
    }

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        mVelocityTracker.addMovement(e);

        int x = (int) e.getX();
        int y = (int) e.getY();
        switch (e.getAction()) {
            case MotionEvent.ACTION_DOWN:
                if (mDeleteBtnState == 0) {
                    View view = findChildViewUnder(x, y);
                    if (view == null) {
                        return false;
                    }

                    MyViewHolder viewHolder = (MyViewHolder ) getChildViewHolder(view);

                    mItemLayout = viewHolder.rv_News;
                    mPosition = viewHolder.getAdapterPosition();

                    mDelete = (TextView) mItemLayout.findViewById(R.id.tv_Delete);
                    mMaxLength = mDelete.getWidth();
                    mDelete.setOnClickListener(new OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            mListener.onDeleteClick(mPosition);
                            mItemLayout.scrollTo(0, 0);
                            mDeleteBtnState = 0;
                        }
                    });
                } else if (mDeleteBtnState == 3) {
                    mScroller.startScroll(mItemLayout.getScrollX(), 0, -mMaxLength, 0, 200);
                    invalidate();
                    mDeleteBtnState = 0;
                    return false;
                } else {
                    return false;
                }

                break;
            case MotionEvent.ACTION_MOVE:
                int dx = mLastX - x;
                int dy = mLastY - y;

                int scrollX = mItemLayout.getScrollX();
                if (Math.abs(dx) > Math.abs(dy)) {//     
                    isItemMoving = true;
                    if (scrollX + dx <= 0) {
                        mItemLayout.scrollTo(0, 0);
                        return true;
                    } else if (scrollX + dx >= mMaxLength) {//     
                        mItemLayout.scrollTo(mMaxLength, 0);
                        return true;
                    }
                    mItemLayout.scrollBy(dx, 0);//item      
                }
                break;
            case MotionEvent.ACTION_UP:
                if (!isItemMoving && !isDragging && mListener != null) {//item    
                    mListener.onItemClick(mItemLayout, mPosition);
                }
                isItemMoving = false;

                mVelocityTracker.computeCurrentVelocity(1000);//         
                float xVelocity = mVelocityTracker.getXVelocity();//      （    ）
                float yVelocity = mVelocityTracker.getYVelocity();//      

                int deltaX = 0;
                int upScrollX = mItemLayout.getScrollX();

                if (Math.abs(xVelocity) > 100 && Math.abs(xVelocity) > Math.abs(yVelocity)) {
                    if (xVelocity <= -100) {//      100，       
                        deltaX = mMaxLength - upScrollX;
                        mDeleteBtnState = 2;
                    } else if (xVelocity > 100) {//      100，       
                        deltaX = -upScrollX;
                        mDeleteBtnState = 1;
                    }
                } else {
                    if (upScrollX >= mMaxLength / 2) {//item                 ，       
                        deltaX = mMaxLength - upScrollX;
                        mDeleteBtnState = 2;
                    } else if (upScrollX < mMaxLength / 2) {//    
                        deltaX = -upScrollX;
                        mDeleteBtnState = 1;
                    }
                }
                //item         
                mScroller.startScroll(upScrollX, 0, deltaX, 0, 200);
                isStartScroll = true;
                invalidate();

                mVelocityTracker.clear();
                break;
        }

        mLastX = x;
        mLastY = y;
        return super.onTouchEvent(e);
    }

    @Override
    public void computeScroll() {
        if (mScroller.computeScrollOffset()) {
            mItemLayout.scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
            invalidate();
        } else if (isStartScroll) {
            isStartScroll = false;
            if (mDeleteBtnState == 1) {
                mDeleteBtnState = 0;
            }

            if (mDeleteBtnState == 2) {
                mDeleteBtnState = 3;
            }
        }
    }

    @Override
    protected void onDetachedFromWindow() {
        mVelocityTracker.recycle();
        super.onDetachedFromWindow();
    }

    @Override
    public void onScrollStateChanged(int state) {
        super.onScrollStateChanged(state);
        isDragging = state == SCROLL_STATE_DRAGGING;
    }

    public void setOnItemClickListener(OnItemClickListener listener) {
        mListener = listener;
    }

    public interface OnItemClickListener {
        /**
         * item    
         *
         * @param view
         * @param position
         */
        void onItemClick(View view, int position);

        /**
         *       
         *
         * @param position
         */
        void onDeleteClick(int position);
    }
}

코드는 여기까지입니다. 이것은 인터넷에서 사용자 정의 RecyclerView를 찾아서 사이드 슬라이딩 삭제를 실현하는 데 가장 좋은 것입니다. 예를 들어 삭제와 같습니다.