MyItemTouchHelperCallback callback = new MyItemTouchHelperCallback(adapter); //此類繼承ItemTouchHelper.Callback,這是幫助處理RecylerView拖動(dòng)側(cè)滑操作的輔助類 ItemTouchHelper helper = new ItemTouchHelper(callback); //用上面實(shí)例化的callback實(shí)例化一個(gè)ItemTouchHelper對(duì)象。套路代碼，沒(méi)啥好說(shuō)的，固定做法 helper.attachToRecyclerView(recyclerView); //讓help幫助處理recylerview的滑動(dòng)，側(cè)滑操作

public interface OnMoveAndSwipeListener { public boolean onItemMove(int fromPosition, int toPosition); //注意返回boolean哦 public void onItemDismiss(int position); }

@Override public boolean onItemMove(int fromPosition, int toPosition) { if (fromPosition < toPosition) { //往下移動(dòng)時(shí),做數(shù)據(jù)交換 for (int i = fromPosition; i < toPosition; i++) { Collections.swap(list,i,i+1); } }else{ //往上移動(dòng),做數(shù)據(jù)交換 for (int i = fromPosition; i >toPosition ; i--) { Collections.swap(list,i,i-1); } } notifyItemMoved(fromPosition,toPosition); return true; } @Override public void onItemDismiss(int position) { //此例沒(méi)有對(duì)側(cè)滑做操作，如果需要就在此模仿onItemMove方法，刪除對(duì)應(yīng)位置的數(shù)據(jù)，并且刷新界面就可以了 }

public class MyItemTouchHelperCallback extends ItemTouchHelper.Callback { MyAdapter adapter; public MyItemTouchHelperCallback(MyAdapter adapter) { this.adapter = adapter; } @Override public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { //復(fù)寫此方法用來(lái)設(shè)置我需要處理哪些操作 //我要處理上下拖動(dòng)，就設(shè)置up down，如果是gridview類型的recylerview，up,down,left,right都可以處理 final int moveMode = ItemTouchHelper.UP | ItemTouchHelper.DOWN; //本例沒(méi)有處理側(cè)滑，如果需要處理側(cè)滑，就把注釋取消掉 //final int swipeMode = ItemTouchHelper.START | ItemTouchHelper.END; Log.e("getMovementFlags","getMovementFlags"); return makeMovementFlags(moveMode, 0);//不處理什么，就傳0 } @Override public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) { //當(dāng)你拖動(dòng)時(shí)就會(huì)觸發(fā)此回調(diào)，然后調(diào)用在adapter中復(fù)寫的onItemMove方法，去交換數(shù)據(jù) return adapter.onItemMove(viewHolder.getAdapterPosition(),target.getAdapterPosition()); } @Override public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) { //如果你要處理側(cè)滑就取消注釋，邏輯和上面的onMove一樣 // adapter.onItemDismiss(viewHolder.getAdapterPosition()); } @Override public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) { //此方法在你選中一個(gè)item拖動(dòng)時(shí)觸發(fā)，所以你可以在這里給選中的item設(shè)置一個(gè)背景色，用于高亮提示你選中了這個(gè)背景色 super.onSelectedChanged(viewHolder, actionState); if (actionState!= ItemTouchHelper.ACTION_STATE_IDLE){ viewHolder.itemView.setBackgroundColor(Color.LTGRAY); } } @Override public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { //因?yàn)槟阍O(shè)置了背景色，所以在你不選中的時(shí)候，要取消掉這個(gè)背景色。 super.clearView(recyclerView, viewHolder); viewHolder.itemView.setBackgroundColor(0); } }

<?xml version="1.0" encoding="utf-8"?> <!--背景view，用于提示用戶操作結(jié)果--> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/rl_background" android:layout_width="match_parent" android:layout_height="wrap_content"> <ImageView android:id="@+id/iv_done" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginLeft="16dp" android:layout_marginStart="16dp" android:src="@mipmap/bt_ic_done_white_24" /> <ImageView android:id="@+id/iv_schedule" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginEnd="16dp" android:layout_marginRight="16dp" android:src="@mipmap/bt_ic_schedule_white_24" /> <!--滑動(dòng)操作的view--> <LinearLayout android:id="@+id/ll_item" android:layout_width="match_parent" android:layout_height="64dp" android:background="@android:color/white" android:gravity="center_vertical" android:orientation="vertical" android:paddingLeft="16dp" android:paddingRight="16dp"> <TextView android:id="@+id/tv_item" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceMedium" tools:text="Item" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:layout_below="@id/ll_item" android:background="#B2B2b2" /> </RelativeLayout>

<span style="white-space:pre"> </span> @Override public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { // 釋放View時(shí)回調(diào)，清除背景顏色，隱藏圖標(biāo) // 默認(rèn)是操作ViewHolder的itemView，這里調(diào)用ItemTouchUIUtil的clearView方法傳入指定的view getDefaultUIUtil().clearView(((SampleAdapter.ItemViewHolder) viewHolder).vItem); ((SampleAdapter.ItemViewHolder) viewHolder).vBackground.setBackgroundColor(Color.TRANSPARENT); ((SampleAdapter.ItemViewHolder) viewHolder).ivSchedule.setVisibility(View.GONE); ((SampleAdapter.ItemViewHolder) viewHolder).ivDone.setVisibility(View.GONE); } @Override public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) { // 當(dāng)viewHolder的滑動(dòng)或拖拽狀態(tài)改變時(shí)回調(diào) if (viewHolder != null) { // 默認(rèn)是操作ViewHolder的itemView，這里調(diào)用ItemTouchUIUtil的clearView方法傳入指定的view getDefaultUIUtil().onSelected(((SampleAdapter.ItemViewHolder) viewHolder).vItem); } } @Override public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) { // ItemTouchHelper的onDraw方法會(huì)調(diào)用該方法，可以使用Canvas對(duì)象進(jìn)行繪制，繪制的圖案會(huì)在RecyclerView的下方 // 默認(rèn)是操作ViewHolder的itemView，這里調(diào)用ItemTouchUIUtil的clearView方法傳入指定的view getDefaultUIUtil().onDraw(c, recyclerView, ((SampleAdapter.ItemViewHolder) viewHolder).vItem, dX, dY, actionState, isCurrentlyActive); if (dX > 0) { // 向左滑動(dòng)是的提示 ((SampleAdapter.ItemViewHolder) viewHolder).vBackground.setBackgroundResource(R.color.colorDone); ((SampleAdapter.ItemViewHolder) viewHolder).ivDone.setVisibility(View.VISIBLE); ((SampleAdapter.ItemViewHolder) viewHolder).ivSchedule.setVisibility(View.GONE); } if (dX < 0) { // 向右滑動(dòng)時(shí)的提示 ((SampleAdapter.ItemViewHolder) viewHolder).vBackground.setBackgroundResource(R.color.colorSchedule); ((SampleAdapter.ItemViewHolder) viewHolder).ivSchedule.setVisibility(View.VISIBLE); ((SampleAdapter.ItemViewHolder) viewHolder).ivDone.setVisibility(View.GONE); } } @Override public void onChildDrawOver(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) { // ItemTouchHelper的onDrawOver方法會(huì)調(diào)用該方法，可以使用Canvas對(duì)象進(jìn)行繪制，繪制的圖案會(huì)在RecyclerView的上方 // 默認(rèn)是操作ViewHolder的itemView，這里調(diào)用ItemTouchUIUtil的clearView方法傳入指定的view getDefaultUIUtil().onDrawOver(c, recyclerView, ((SampleAdapter.ItemViewHolder) viewHolder).vItem, dX, dY, actionState, isCurrentlyActive); } });