度娘搜索RecyclerView长按拖拽排序，很多文章讲解，没找到缩短长按响应时间的，所以自己研究了一下

android开发分享荐 RecyclerView长按拖拽排序 ，缩短长按响应时间，长按0.1秒就可以开始拖动借鉴其他博客实现基本的拖拽排序功能，修改长按响应时间是自己实现的，转载请注明原文链接

先看效果图

上代码（核心代码 重写itemtouchhelper）

代码有注释，有问题可以评论回复，尽量及时答复

package com.example.itemtouchhelper;  import android.app.Service; import android.graphics.Color; import android.os.Handler; import android.os.Vibrator; import android.view.MotionEvent;  import androidx.annotation.NonNull; import androidx.recyclerview.widget.GridLayoutManager; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView;  import java.util.Collections; import java.util.List;  /**  * @author FANG SHIXIAN  * @date 2020/6/23.  * description：  */ public class MyItemTouchHelper {      /**      * 已选图片拖动改变顺序，      * 禁止添加图片的item拖拽，      * 拖拽到添加图片的位置不响应位置交换      */     public static <T> void initItemTouchHelper(final RecyclerView recycler, final RecyclerView.Adapter adapter, final List<T> list) {          ItemTouchHelper helper;         ItemTouchHelper.Callback callback = new ItemTouchHelper.Callback() {             @Override             public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {                 //某个类型的viewHolder不可拖动 //                if (viewHolder instanceof XXViewHolder){ // XXViewHolder 是不可拖动的viewHolder类型，使用的时候替换 //                    return makeMovementFlags(0,0); //                }                 int dragFlag = 0;                 if (recyclerView.getLayoutManager() instanceof GridLayoutManager) {                     //GridLayout布局允许 上下左右 拖动                     dragFlag = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;                 } else if (recyclerView.getLayoutManager() instanceof LinearLayoutManager) {                     //LinearLayout布局 只允许 上下 拖动                     dragFlag = ItemTouchHelper.UP | ItemTouchHelper.DOWN;                 }                 //dier个参数swipeFlags应该是拖动删除                 return makeMovementFlags(dragFlag, 0);             }              @Override             public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {                 //滑动事件  下面注释的代码，滑动后数据和条目错乱，被舍弃 //            Collections.swap(datas,viewHolder.getAdapterPosition(),target.getAdapterPosition()); //            ap.notifyItemMoved(viewHolder.getAdapterPosition(),target.getAdapterPosition());                  //得到当拖拽的viewHolder的Position                 int fromPosition = viewHolder.getAdapterPosition();                 //拿到当前拖拽到的item的viewHolder                 int toPosition = target.getAdapterPosition();                 if (fromPosition < toPosition) {                     for (int i = fromPosition; i < toPosition; i++) {                         Collections.swap(list, i, i + 1);                     }                 } else {                     for (int i = fromPosition; i > toPosition; i--) {                         Collections.swap(list, i, i - 1);                     }                 }                 adapter.notifyItemMoved(fromPosition, toPosition);                 return true;             }              @Override             public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {                 //侧滑删除可以使用；             }               @Override             public boolean isLongPressDragEnabled() {                 return true;             }              /**              * 长按选中Item的时候开始调用              * 长按高亮              * @param viewHolder              * @param actionState              */             @Override             public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {                  if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {                     viewHolder.itemView.setBackgroundColor(Color.RED);//（拖动开始 修改item的背景色，我这里设置了红色）                     //获取系统震动服务//震动70毫秒 (需要添加震动权限)                     Vibrator vib = (Vibrator) recycler.getContext().getSystemService(Service.VIBRATOR_SERVICE);                     vib.vibrate(70);                 }                 super.onSelectedChanged(viewHolder, actionState);             }              /**              * 手指松开的时候还原高亮              * @param recyclerView              * @param viewHolder              */             @Override             public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {                 super.clearView(recyclerView, viewHolder);                 viewHolder.itemView.setBackgroundColor(Color.BLUE);//（拖动结束后恢复item的背景色，我这里故意设置了蓝色） //                adapter.notifyDataSetChanged();  //完成拖动后刷新适配器，这样拖动后删除就不会错乱（拖动排序不是必须的）             }         };          helper = new ItemTouchHelper(callback);         helper.attachToRecyclerView(recycler);//ItemTouchHelper绑定recyclerView  //        ItemTouchHelperGestureListener原生不是public修饰的，需要把源码复制到项目里才能实例化         ItemTouchHelper.ItemTouchHelperGestureListener listener = helper.getmItemTouchHelperGestureListener();          //Handler最后是全局使用同一个，避免内存泄漏，         // 我这里demo为了方便直接new Handler()         setLongClickDelay(new Handler(), recycler, 100, listener);     }       /**      * 修改item长按拖动的响应时间      * @param handler Handler      * @param v RecyclerView      * @param delay  长按响应时间      * @param itemTouchHelperGestureListener 修改源码后的ItemTouChHelper的itemTouchHelperGestureListener      */     private static void setLongClickDelay(final Handler handler, final RecyclerView v, long delay,                                           final ItemTouchHelper.ItemTouchHelperGestureListener itemTouchHelperGestureListener) {         final long delayMillis = delay < 50 ? 50 : delay;           v.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {             private static final int TOUCH_MAX = 50;             MotionEvent mEvent;             private int mLastMotionX;             private int mLastMotionY;             private boolean mHasPerformedLongPress = false;              private Runnable performLongClick = new Runnable() {                 @Override                 public void run() { //                    mHasPerformedLongPress = v.performLongClick();                     if (mEvent != null) {                         mHasPerformedLongPress = true;                         //响应长按onLongPress                         itemTouchHelperGestureListener.onLongPress(mEvent);                         mEvent = null;                     }                 }             };               @Override             public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent event) {                 int x = (int) event.getX();                 int y = (int) event.getY();                  switch (event.getAction()) {                     case MotionEvent.ACTION_UP:                         mEvent = null;                         handler.removeCallbacks(performLongClick);                         // case 1                         v.setTag(mHasPerformedLongPress);                         v.performClick();                         // case 2                         /*if (!mHasPerformedLongPress) {                             v.performClick();                         }*/                         break;                     case MotionEvent.ACTION_MOVE:                          if (Math.abs(mLastMotionX - x) > TOUCH_MAX || Math.abs(mLastMotionY - y) > TOUCH_MAX) {                             mEvent = null;                             handler.removeCallbacks(performLongClick);                         }                         break;                     case MotionEvent.ACTION_DOWN:                          mHasPerformedLongPress = false;                         handler.removeCallbacks(performLongClick);                         mLastMotionX = x;                         mLastMotionY = y;                          // 不能直接用mEvent = event，这样赋值 mEvent 的 getX 和 getY 得到的值是相对屏幕（或者是父布局）的，                         // 具体原理不清楚                         mEvent = MotionEvent.obtain(event);                         handler.postDelayed(performLongClick, delayMillis);                          break;                     case MotionEvent.ACTION_CANCEL:                         handler.removeCallbacks(performLongClick);                         break;                 }                 return false;             }              @Override             public void onTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent event) {              }              @Override             public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {              }         });  //        v.setOnTouchListener(new View.OnTouchListener() { //            private static final int TOUCH_MAX = 50; // //            private int mLastMotionX; //            private int mLastMotionY; //            private boolean mHasPerformedLongPress = false; // //            private Runnable performLongClick = new Runnable() { //                @Override //                public void run() { //                    mHasPerformedLongPress = v.performLongClick(); //                } //            }; // //            @Override //            public boolean onTouch(View v, MotionEvent event) { //                int x = (int) event.getX(); //                int y = (int) event.getY(); // //                switch (event.getAction()) { //                    case MotionEvent.ACTION_UP: //                        handler.removeCallbacks(performLongClick); //                        // case 1 //                        v.setTag(mHasPerformedLongPress); //                        v.performClick(); //                        // case 2 //                        /*if (!mHasPerformedLongPress) { //                            v.performClick(); //                        }*/ //                        break; //                    case MotionEvent.ACTION_MOVE: //                        if (Math.abs(mLastMotionX - x) > TOUCH_MAX || Math.abs(mLastMotionY - y) > TOUCH_MAX) { //                            handler.removeCallbacks(performLongClick); //                        } //                        break; //                    case MotionEvent.ACTION_DOWN: //                        time = System.currentTimeMillis(); //                        Log.e("test", time + "  ACTION_DOWN "); // //                        mHasPerformedLongPress = false; //                        handler.removeCallbacks(performLongClick); //                        mLastMotionX = x; //                        mLastMotionY = y; //                        handler.postDelayed(performLongClick, delayMillis); //                        break; //                } //                return false; //            } //        });     } }   

最后上源码地址 ItemTouchHelper 缩短长按响应时间